室町ケミカル List of Products and Services

Muromachi Chemical leverages its long-standing experience in ion exchange resins and separation membranes to propose systems tailored to customer needs as a specialist in water treatment, providing total support. We also conduct regeneration treatment of ion exchange resins. We handle various ion exchange resins, including Muromac, Lewatit, and DUOLITE. For more details, please check the catalog download.

The Muromac UL series is a high-level cross-linked cation exchange resin that has successfully achieved high oxidation resistance by increasing the degree of cross-linking, significantly reducing the leaching of high molecular weight organic substances. ≪Features of the UL Series≫ ● Due to its high degree of cross-linking, it exhibits outstanding oxidation resistance. ● Because of its excellent oxidation resistance, it has low organic substance leaching. ● It has low leaching of high molecular weight organic substances, which can cause performance degradation in anion resins. ● Compared to general-purpose resins, its exchange capacity is approximately 20% larger. ● With a larger exchange capacity, the amount of water that can be sampled is greater, reducing the frequency of regeneration. ● From these perspectives, it is expected to help suppress water quality deterioration, extend resin lifespan, and increase sampling capacity.

The Muromac HG series is a newly developed high-purity ion exchange resin designed to enable the high purification of various chemicals and process liquids required in the manufacturing process of electronic industrial products. ● To minimize elution from the resin, impurities such as metal and TOC contained in the resin are reduced in advance. ● Suitable for the purification of electronic material chemicals and process liquids in both aqueous and organic solvent systems. ● Specializes in the removal of ionic impurities in the ppm and ppb range.

We offer cleaning and mixed products of strong acid cation exchange resin type H and strong base anion exchange resin (types 1 and 2) OH type according to your application. Depending on the target values set, we can provide consultation on the selection of ion exchange resins, mixing ratios, cleaning methods, and more.

The ion exchange resin "chelate resin" selectively retains metal ions by forming chelates between the exchange groups and metal ions, rather than through adsorption via ion exchange, within its effective pH range. Depending on the selected metal, there are various resins with different exchange groups such as iminodiacetic acid groups, thiourea groups, aminophosphonic acid groups, and semithiocarbamic acid groups. ● For more details, please contact us or download the catalog.

The "Muromac UL Series" is a cation exchange resin that enhances crosslinking to achieve high oxidation resistance and significantly reduces the leaching of organic substances. It has a large exchange capacity, which increases the amount of water that can be collected, reduces the frequency of regeneration treatment, and contributes to the longevity of the ion exchange resin. It is suitable for applications that require high water quality, such as pure water production systems and condensate desalination systems. There are standard grades and high-grade products that further reduce leaching. [Examples of Applications] ■ Condensate desalination systems for thermal power plants and nuclear power plants ■ Pure water production systems for boiler feed water ■ Final stage polishers for ultra-pure water production systems, such as those used in semiconductor manufacturing ■ Pure water systems that use ozone, hydrogen peroxide, or ultraviolet irradiation equipment ■ Metal removal from liquids containing oxidizing substances ★ Resin samples are currently being offered. Please feel free to contact us. You can view product catalogs and water treatment glossaries from the "PDF Download" section.

Ion exchange resins "Muromac," "Lewatit," "DUOLITE" ○ Strongly acidic cation exchange resin ○ Weakly acidic cation exchange resin ○ Strongly basic anion exchange resin ○ Weakly basic anion exchange resin ○ Ion exchange resins for special applications (chelate resins) ○ Mixed bed resins ○ AMBERCHROME Finemesh We offer a wide range of ion exchange resins to meet various needs. For more details, please download the catalog.

The ion exchange resin "AMBERCHROME Finemesh" is a product line of strong acid cation exchange resins with varying degrees of cross-linking (the percentage of divinylbenzene relative to styrene). There are three types with different particle size distributions: 2%, 4%, and 8%. They are used in a wide range of applications including analysis, separation, and purification. For more details, please download the catalog.

The weakly basic anion exchange resin "tertiary amine group" is an anion exchange resin that has a weakly basic tertiary amine -N+(CH3)2 as its exchange group. In the acidic region where pH < 7, it coordinates with Cl- to form the Cl- type, but in the region where pH > 7, it does not form the OH- type, and a pair of free electrons remains on the tertiary amine group (free base). It is easy to regenerate and can be processed using the batch method. For more details, please download the catalog.

We would like to introduce a case where we resolved the construction of a cleaning method to meet individual user quality requirements and the contracting of cleaning work. The user has an ion exchange resin used for analytical purposes, but issues arose due to trace contaminants (such as residues from surfactants) on the surface of the ion exchange resin. However, according to the Certificate of Analysis (COA) from the resin manufacturer, it was deemed a pass, and the manufacturer stated that further cleaning was difficult. Since the ion exchange resin from the LOT that experienced issues during user testing could no longer be used, we sought a cleaning method to meet the required quality. Umemura Chemical has extensive knowledge of various ion exchange resins, so we received a request to consider a resin cleaning method. [Overview] - Industry: Analytical Testing - Area: Confidential - Key Technology: Cleaning of Ion Exchange Resins *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce a case of the installation of a removal device for nitrate nitrogen contained in wastewater from metal finishing processes. The customer was concerned that "the concentration of nitrate nitrogen in the cleaning wastewater of zinc phosphate coated products is high and needs to be reduced." In response, Muromachi Chemical first conducted water sampling at the customer's site, analyzed the wastewater components in the lab, and then performed a flow test using ion exchange resin with the sampled wastewater to confirm the removal performance of nitrate nitrogen. By conducting the flow test, we were able to propose a suitable treatment device for the customer. 【Overview】 ■ Industry: Metal Finishing ■ Area: Kanto ■ Source Water Type: Cleaning wastewater from zinc phosphate coated products ■ Treatment Capacity: 1m3/h ■ Key Technology: Anion exchange resin *For more details, please refer to the PDF document or feel free to contact us.

The "Muromac WMT-718B-FB" is an ion exchange resin specifically designed for the adsorption of organic fluorine compounds known as PFAS. It has high selectivity and adsorption capacity for PFAS, contributing to the removal of PFAS present in groundwater and wastewater. Based on data from flow-through tests, we can propose equipment designs tailored to the characteristics of the raw water and treatment target concentrations. We are currently offering a catalog. 【Features】 ■ Capable of removing a wide range of organic fluorine compounds from long-chain to short-chain ■ Proposals suitable for the types and compositions of PFAS in the raw water ■ Improved treatment accuracy is expected when used in conjunction with activated carbon treatment ■ Flexible installation options that can be added to existing equipment *For more details, please refer to the PDF materials. Feel free to contact us with any inquiries.

We would like to introduce a case study confirming the effectiveness of treating Cu and Cd in on-site water using chelating resin. The facility was struggling with the desire to "lower and stabilize the values of Cu and Cd in the on-site water generated at the site," and the challenge was whether the chelating resin could achieve a lower and more stable treatment. Currently, the generated on-site water is stored in a reservoir, and treatment is performed by adding neutralizing agents and coagulants, but they were considering whether there might be a better treatment method. In response, Muromachi Chemical proposed "conducting actual treatment data acquisition using a testing machine on-site with chelating resin." [Overview] - Area: Chubu region - Treatment capacity: 60m3/h - Main technology: Ion exchange resin *For more details, please refer to the PDF document or feel free to contact us.

We will introduce a case of drying and grinding ion exchange resin. The recurring challenge was the selection method for ion exchange resin, which serves as the material for developing new filters. Additionally, to use the ion exchange resin in filters, it needed to be dried and ground. Since we relied on outsourcing to companies capable of handling each process, manufacturing took longer, leading to increased material costs. By managing the entire process from application development to processing of ion exchange resin in-house, we were able to select suitable products from a wide range of ion exchange resins and perform the drying and grinding of the resin in the same factory, resulting in improved efficiency. [Overview] ■Industry: Chemical Manufacturer ■Area: Ion Exchange Resin (Drying and Grinding) *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce a case of removing fluoride (F) and boron (B) from wastewater using ion exchange resin. In the cleaning process of a new product being manufactured at a facility, fluoride is generated, and we want to treat it to meet the sewer discharge standards. However, the chemicals used in the production contain hydrofluoric acid and boric acid, and after cleaning the products, the concentrations of fluoride and boron in the wastewater exceeded the standard values. Since the existing wastewater treatment facility could not accept this, it was a challenge to reduce the concentrations to the standard values before merging with the existing treatment facility. Therefore, Muromachi Chemical proposed "removal of fluoride and boron using a device with cartridges." 【Overview】 ■ Industry: Manufacturing ■ Area: Kanto region ■ Source water type: Cleaning wastewater from manufactured products ■ Treatment capacity: 0.1 m3/h ■ Main technology: Ion exchange resin *For more details, please refer to the PDF document or feel free to contact us.

We would like to introduce a case where manganese (Mn) in wastewater from a business was reduced to below the discharge standard using chelating resin for wastewater treatment. The company is engaged in industrial waste disposal and has already installed and is operating coagulation and sedimentation equipment; however, during certain seasons, the Mn concentration exceeded the discharge standard. The cause was identified as seasonal fluctuations in the industrial water used by the business, and improvements to the existing equipment or the addition of new equipment were being considered to resolve the issue. Generally, methods proposed by other companies are common, but due to the low treatment volume and the minimal presence of heavy metals other than Mn, a method using chelating resin was implemented. 【Overview】 ■Industry: Industrial waste disposal ■Area: Kanto region ■Source water type: Effluent from existing wastewater treatment equipment ■Treatment volume: 1m3/h ■Main technology: Chelating resin *For more details, please refer to the PDF document or feel free to contact us.

Selenium at a concentration of 0.4 ppm is present in the drainage generated from tunnel construction, and since construction cannot proceed unless the drainage is reduced to below the standard value of 0.1 ppm, we considered whether treatment using ion exchange resin could be implemented. Generally, the drainage generated from tunnel construction undergoes coagulation and sedimentation treatment; however, this requires a large equipment space and may lead to factors causing poor coagulation. Therefore, we sampled the actual drainage occurring at the site and conducted a liquid flow test using ion exchange resin at our lab. We confirmed the adsorption performance for selenium and demonstrated that treatment from 0.4 ppm to below 0.1 ppm is possible. [Issues with Coagulation and Sedimentation Treatment] ■ Removal of Selenium from Drainage - The concentration of selenium in the drainage generated from construction fluctuates, causing variations in the selenium concentration of the treated water from coagulation and sedimentation. - These fluctuations can also lead to variations in the amount of coagulant used, potentially resulting in poor coagulation. ■ Large equipment space required. *For more details, please refer to the related links or feel free to contact us.

There is an ion exchange resin used for analytical purposes, but issues have arisen due to trace contaminants (such as residues from surfactants) on the surface of the ion exchange resin. Additionally, the manufacturer has indicated that further cleaning beyond what has already been done is difficult, and we have been exploring cleaning methods to meet the customer's specific quality requirements. Since the customer's quality evaluation test methods were not disclosed, we created several cleaning samples by adjusting the chemicals and process times used for cleaning. After evaluating multiple samples, we established a cleaning method that meets the required quality. 【Case Overview】 ■ Industry: Analytical Testing ■ Key Technology: Cleaning of Ion Exchange Resin ■ Challenge: Resolving issues caused by surface contaminants on ion exchange resin used for analytical purposes *For more details, please refer to the related links or feel free to contact us.

Ion exchange resins are used to adsorb ions of impurities present in water through ion exchange reactions, thereby purifying the water. The capacity to adsorb these ions has its limits, but once the limit is reached, it can be reused by performing a "regeneration" operation using chemicals. This column explains "regeneration operations" and "regeneration characteristics" using diagrams. Cation exchange resins are regenerated using mineral acids such as hydrochloric acid or sulfuric acid, while anion exchange resins are regenerated using alkalis such as sodium hydroxide (caustic soda). Additionally, water softeners that use cation exchange resins are regenerated with a salt (sodium chloride) solution. [Overview] ■ Regeneration Operations ■ Regeneration Characteristics *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

Ion exchange resins are used in a wide range of applications, such as the production of pure water and the recovery of metals. In normal usage environments, they can be used for over a year while performing regeneration operations with chemicals as needed. However, as they are used, various performance aspects of the ion exchange resins deteriorate, necessitating replacement. In this column, we will introduce an example of the factors that lead to the decline in performance of ion exchange resins, such as "decreased reaction speed" and "physical degradation." [Overview] ■ Insufficient ion exchange capacity ■ Decreased reaction speed ■ Physical degradation *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

Ion exchange resins are spherical substances with a diameter of approximately 0.3 to 1.2 mm, and there are ion exchange resins with a wide range of particle size distributions known as "Gaussian distribution" and those with a nearly uniform particle size distribution called "uniform particle size distribution." These are used differently depending on their applications, but ion exchange resins with a uniform particle size distribution often have advantageous characteristics. In this column, we explain topics such as "differences in particle size distribution due to manufacturing methods" and "differential pressure characteristics (pressure loss)." [Overview] ■ Differences in particle size distribution due to manufacturing methods ■ Differences in characteristics based on particle size distribution ■ Differential pressure characteristics (pressure loss) ■ Backwashing expansion and separation characteristics ■ Swelling ratio *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

Ion exchange resins are widely used in the production of pure water and wastewater treatment. They are plastic spheres with a diameter of about 0.7 mm, strong and stable objects that do not easily break even when pressed with a finger. Typically, they can be used for several years, but just as blue sheets and PVC pipes deteriorate, ion exchange resins also gradually degrade with age. This column explains topics such as "methods for evaluating physical strength" and "accelerated aging tests" using diagrams. When used for long periods, it is advisable to regularly sample and check the physical properties. [Overview] ■ Importance of physical strength ■ Methods for evaluating physical strength ■ Accelerated aging tests *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

An important item for evaluating the performance of ion exchange resins is "ion exchange capacity." The ion exchange capacity of standard cation exchange resins is about 2 equivalents per liter. The amount that can be adsorbed varies by element; for sodium ions, it is 46g per liter of cation exchange resin, for magnesium ions, it is 24g, and for cesium ions, it is 266g. In this column, we introduce topics such as "the relationship between the types of ion exchange resins and their exchange capacity" and "the measurement procedures for ion exchange capacity." [Overview] ■ Overview of ion exchange capacity ■ Pre-treatment of ion exchange capacity ■ Collection of ion exchange capacity ■ Measurement procedures for ion exchange capacity ■ Measurement of continuous flow exchange capacity *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.

As an evaluation item for the performance of ion exchange resins, an important physical property alongside "ion exchange capacity" is "reaction rate." Generally, those with a large ion exchange capacity have a low reaction rate, while those with a small ion exchange capacity have a high reaction rate. Therefore, the priority of either characteristic depends on the application conditions. In this column, we introduce an example where a water solution is prepared in a beaker and ion exchange resin is added. *For detailed content of the column, please refer to the related links. For more information, feel free to contact us.*

There are various types of ion exchange resins, and to select the appropriate type, it is necessary to recognize their characteristics. One particularly important characteristic is called "selectivity," which can be described as the "preferences of the ions" for the ion exchange resin. Additionally, the ease of adsorption varies depending on the type of ion exchange resin and the type of ions it reacts with, with characteristics such as "ions with higher valence are easier to adsorb" and "for elements in the same group, ions with a larger atomic number are easier to adsorb." In this column, we will provide a detailed explanation with reference to the periodic table and the selectivity coefficients of cation exchange resins and anion exchange resins. *For more detailed content of the column, please refer to the related links. For further inquiries, feel free to contact us.

PFAS refers to a group of compounds known as per- and polyfluoroalkyl substances. They were not originally found in nature but were artificially developed in the 1940s. These substances demonstrate stability, such as heat resistance, water repellency, oil repellency, and flame retardancy, which has led to their widespread use in industrial applications like foam fire extinguishers at airports and military facilities, cooling solvents used in semiconductor manufacturing, and metal plating solutions, as well as in consumer products like non-stick frying pan coatings, water-repellent outdoor gear, and food packaging. They repel water and oil, are resistant to heat and chemicals, and do not absorb light. Because they are difficult to break down in the natural environment and tend to accumulate, they are referred to as "forever chemicals." *For more details, please refer to the related links. Feel free to contact us for more information.*

This document introduces recent trends in ion exchange resins, focusing on semiconductor applications (such as ultrapure water production and chemical purification). It includes explanations about water, the structure, types, and characteristics of ion exchange resins, the production of pure and ultrapure water, and the role of ion exchange resins. Additionally, you can also view our proprietary technologies, unique resins, and testing equipment. We encourage you to read it. 【Contents】 ■ Introduction ■ Structure and Types of Ion Exchange Resins ■ Characteristics of Ion Exchange Resins ■ Production of Pure and Ultrapure Water and the Role of Ion Exchange Resins ■ Conclusion *For more details, please download the PDF or feel free to contact us.

● Effective in removing various organic fluorine compounds, from long-chain to short-chain. ● Based on laboratory test results, we will propose the optimal ion exchange resin depending on the types and composition of PFAS in the raw water. ● It can be added to existing equipment without significantly altering the current setup.

The "Muromac WMT-718B-FB" is an ion exchange resin specifically designed for the adsorption of organic fluorine compounds known as PFAS. It has high selectivity and adsorption capacity for PFAS, contributing to the removal of PFAS present in groundwater and wastewater. Based on data from flow tests, we can propose equipment designs tailored to the characteristics of the raw water and treatment target concentrations. We are currently offering a catalog. 【Features】 ■ Capable of removing a wide range of organic fluorine compounds from long-chain to short-chain ■ Proposals suitable for the types and compositions of PFAS in the raw water ■ Improved treatment accuracy can be expected when used in conjunction with activated carbon treatment ■ Flexible installation options that can be added to existing equipment *For more details, please refer to the PDF materials. Feel free to contact us with any inquiries.

The Muromac SG series is a higher-grade product of our HG series. It is a newly developed high-purity ion exchange resin that enables the high purification of various chemicals and process liquids required in the manufacturing process of electronic industrial products. ● To minimize elution from the resin, impurities and TOC are reduced by addressing unreacted materials contained in the resin. ● Effective for the purification of aqueous and organic solvent-based chemicals and process liquids. ● Specializes in the removal of ionic impurities at levels below ppb (patented technology).