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Ion exchange resins for the chemical and petrochemical industry

Steam plays a vital role as an energy carrier in the chemical and petrochemical industries. It is generated centrally and transported through pipe bridges to various points of consumption. To protect the infrastructure of boilers, pipelines, and heat exchangers from scale formation and corrosion, ion exchangers are employed.

In addition to steam, process water with specific requirements is necessary. Lewatit® ion exchangers are used to soften or demineralize the process water and can be combined to achieve desirable outcomes. This ensures a reliable and cost-effective water supply for various processes. Our LewaPlus® design software allows users to model different combinations to find the optimal treatment solution with maximum confidence.

Proper treatment of wastewater from chemical production facilities is crucial to prevent environmental pollution. LANXESS' ion exchangers play a significant role in this process, ensuring thorough and reliable treatment.

Ion exchangers also find application in the selective adsorption of carbon dioxide, a greenhouse gas, from flue gas or the air.

Basic chemicals like sodium hydroxide, chlorine gas, and hydrogen gas are essential in the production of materials such as PVC, paper, cellulose, disinfectants, bleach, and aluminum compounds. These chemicals are derived from chloralkali electrolysis of sodium chloride brine. Ion exchangers are effective in treating highly concentrated hot brines for chloralkali electrolysis, removing alkaline earth or heavy metal ions and protecting membranes used in eco-friendly and energy-efficient membrane techniques from contamination. Similar treatment methods can be applied to other process solutions like pickling acids, rinse water, and electroplating baths.

Catalysts play a critical role in the chemical industry, accelerating reactions and controlling their selectivity. Ion exchangers have established themselves as versatile and efficient catalysts. They are used in acid-catalyzed ester/ether synthesis, condensation reactions (such as in the production of bisphenol A), and hydrogenation reactions (when noble metal ions are involved). After the reaction, the catalyst can be easily and quickly removed.

We collaborate closely with customers to explore new and innovative applications for polymer catalysts and develop customized product types to meet their specific needs.

 

 

CONDENSATION REACTIONS (BISPHENOL A)

Bisphenol A, a crucial component in the production of polycarbonate plastics and epoxy resins, is synthesized through a condensation reaction between phenol and acetone. This reaction is catalyzed by strongly acidic Lewatit® ion exchangers in gel form.

ETHERIFICATIONS (MTBE, ETBE, TAME, TAEE)

Antiknock agents such as MTBE (methyl tert-butyl ether), TAME (tert-amyl methyl ether), and TAEE (tert-amyl ethyl ether) are commonly used in gasoline production. These agents are synthesized through etherification reactions, specifically an addition reaction between olefins (such as isobutylene) and alcohols (such as methanol or ethanol). These reactions are catalyzed by strongly acidic and macroporous Lewatit® cation exchangers. The cation exchangers provide the necessary acidity to facilitate the etherification process and promote the formation of the desired antiknock agents.

BIODIESEL PRODUCTION

Fatty acid methyl esters, which serve as biodiesel or feedstock for fatty alcohols, are manufactured through the esterification of fatty acids with methanol. This reaction is catalyzed by our strongly acidic and macroporous Lewatit® GF 101 ion exchanger or concentrated mineral acids. These catalysts provide the necessary acidity to facilitate the esterification process and promote the formation of fatty acid methyl esters.

Furthermore, our Lewatit® GF 202 ion exchanger is utilized for the purification of anhydrous biodiesel. It helps remove impurities and contaminants from the biodiesel, ensuring a high-quality end product.

CHLORALKALI ELECTROLYSIS (BRINE PURIFICATION)

The membranes utilized in chloralkali electrolysis for the membrane technique are highly sensitive and susceptible to damage. To safeguard these valuable fluorinated membranes from contamination, targeted treatment of brines with ion exchange resins becomes imperative.

Two types of chelating ion exchange resins, namely IDA (iminodiacetic acid) and AMPA (aminomethylphosphonic acid), are employed for treating the brines. Our product range includes Lewatit® MonoPlus TP 208 and Lewatit® MonoPlus TP 260, which are specifically designed for brine softening and removal of alkaline earth metals. Additionally, for enhanced efficiency, we offer finely dispersed types such as Lewatit® MDS TP 208 and Lewatit® MDS TP 260. These finely dispersed resins provide highly effective treatment solutions for brines in chloralkali electrolysis processes.

ESTERIFICATIONS

The esterification reaction between carboxylic acids (such as acetic acid, fatty acids, or (meth-)acrylic acid) and alcohols (such as methanol, ethanol, or butanol) is catalyzed by strongly acidic and macroporous Lewatit® ion exchangers.

These ion exchangers provide the necessary acidity to facilitate the esterification process and promote the formation of the desired esters. By selectively binding and releasing ions, Lewatit® ion exchangers help drive the reaction towards ester formation, resulting in the production of the corresponding esters. This catalytic process is crucial in various industries where ester synthesis is required, such as in the production of solvents, fragrances, flavors, and various other chemical products.

PHENOL PURIFICATION

In the Hock process, phenol and acetone are produced by air oxidation of cumene followed by acid decomposition. However, this process generates by-products that cannot be separated from phenol through conventional means. To address this challenge, the by-products are converted into high boilers using Lewatit® K 2431 or Lewatit® K 2420 ion exchangers. These ion exchangers facilitate the conversion of the by-products into higher molecular weight compounds, which can then be easily separated from phenol through distillation. This purification step ensures the production of high-quality phenol without the presence of unwanted by-products.

HYDROGENERATION / OXYGEN REMOVAL

Efficient removal of oxygen from water or other solvents can be achieved by catalyzing its reaction with hydrogen. Palladium-doped weakly or strongly alkaline Lewatit® anion exchangers serve as catalysts in this process. These ion exchangers promote the reaction between oxygen and hydrogen, resulting in the removal of oxygen from the solvent. Alternatively, reducing agents such as hydrazine or formic acid can be used as alternatives to hydrogen for this purpose.

Furthermore, in the hydrogenation of unsaturated organic substrates, palladium-doped strongly acidic Lewatit® cation exchangers are employed. These ion exchangers serve as catalysts for hydrogenation reactions and simultaneously enable acid-catalyzed addition and elimination reactions. This allows for efficient and selective transformations of unsaturated organic compounds under controlled reaction conditions.

The utilization of Lewatit® ion exchangers, doped with palladium and possessing specific acidic or alkaline properties, enables various catalytic reactions and contributes to the development of efficient and versatile processes in organic synthesis.

ADSORPTION OF CARBON DIOXIDE

Our Lewatit® VP OC 1065 ion exchanger facilitates the selective adsorption of carbon dioxide from the air, flue gases, or exhaust gases at room temperature. This ion exchanger has the ability to selectively capture carbon dioxide molecules from these gas streams.

By raising the temperature and applying a vacuum, the pure carbon dioxide can be desorbed from the Lewatit® VP OC 1065 ion exchanger. This allows for the recovery of high-purity carbon dioxide, which can then be utilized as a raw material in various chemical processes. For example, carbon dioxide can be used in the production of chemicals like methanol or in the generation of alternative fuels known as "e-fuels." These e-fuels can contribute to reducing carbon emissions and promoting sustainable energy solutions.

The utilization of Lewatit® VP OC 1065 ion exchanger offers an effective method for capturing and utilizing carbon dioxide, supporting efforts towards carbon capture and utilization in various industries.

 

 

ATS WATER TECHNOLOGY Co., Ltd.

Head office: 54/18 Bui Quang La Street, Ward 12, Go Vap District, Ho Chi Minh City, Viet Nam.

Office: 12 ĐHT10B, Dong Hung Thuan Ward, District 12, City. Ho Chi Minh City, Viet Nam.

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Email: info@atswatertechnology.com

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