Seplite

SEPLITE ® Weak Base Anion Exchange Resin The Weak Base Anion Exchange Resin with primary, secondary, tertiary amine or mixed amine group as active functional groups show different strengths of alkalinity. Most weak Base Anion Exchange Resins with mixed amine group equiped a extremely high operating capacity with the ability to remove both strong and weak acids from solution. There are two kinds of weak base anion exchange resins, Gel type and Macroporous type, which have acrylic backbone, styrene backbone or mixed backbone. Weak base anion exchange resins are more chemically stable and higher resistant to organic fouling than strong base anions. The weak base anion exchange resin is easier to regenerate than the strong base resin, and can be efficiently regenerated with a small amount of sodium hydroxide. Weak base anion exchange resins are commonly used in pharmaceutical, food engineering, and chemical engineering, such as the removal of mineral acid, organic acids an

SEPLITE ® Weak Acid Cation Exchange Resin The weak acid cation exchange resin is the type of ion exchange resin with functional group of carboxylic acid group (-COOH) . They show weak acidity like acetic acid, having the ability to exchange with bases such as NaOH and weak acid salts such as NaHCO3. The weak acid cation exchange resins have two kinds of chemical structures, a methacrylic acid type and an acrylic acid type. This makes a difference for the ion exchange ability. The methacrylic acid type can be used at pH above 5, while the acrylic acid type can be used at pH above 4. Even though use is restricted, it is easier to regenerate than a strong acid cation exchange resin. WAC Resin  are suitable in the fields of removal of water dealkalization, carbonate hardness, purification of antibiotics and amion acid. It is not used much for water processing because of the less acidity, but for antibiotic and amino acid purification. Typical Applications For Weak Acid i

The fmoc ltd  method is a new method for solid phase synthesis of peptides developed by Carpino and Hart based on the Boc method. The fundamental difference between the Fmoc/t-Bu(9-fluorenylmethoxycarbonyl/tert-butoxy) strategy and the Boc/Bzl strategy is the use of alkali-removable Fmoc is a protecting group for α -amino group, the side chain is protected by t-Bu which can be removed by TFA, and the solid phase carrier Wang resin with acid-sensitive linking arm is used, and the final step of the synthesis is removed by TFA. Han Xiang et al. successfully synthesized the 32-peptide thymosin α 1 by Fm oc solid phase method, starting from Fm oc-Asn(Trt)-W angResin, Boc protecting the side chain amino group of Lys, and tert-butyl ester group (O-t-Bu Protecting the side chain carboxyl group of Asp and Glu, t -Bu protects the side chain hydroxyl group of Ser and Thr, and trityl group (Trt) protects the side chain amide group of Asn, and the total synthesis yield is 33.2%, and the purity

SEPLITE ® Strong Base Anion  Exchange Resin The Strong Base Anion Exchange Resin is the type of ion exchange resin with functional group of quaternary ammonium, which is strongly alkaline and dissociates just like NaOH and KOH. In chemical structure, there are two types of strong base anion exchange resin with different alkalinity strengths, Type Ⅰ with a trimethyl ammonium group, Type Ⅱ with a dimethylethanol ammonium group. Type Ⅰ shows a higher alkaline than Type Ⅱ . Compared with type 1 strong base anion, this resin is more suitable for applications needing good rinsing performance and excellent regeneration efficiency. The Strong Base Anion Resin  shows an excellent physical and chemical stability, which is capable of exchanging the different anion under a wide range of pH. The Strong Base Anion Exchange Resin is mainly used in water treatment, to produce high purity demineralized water, making use of the ability to adsorb anions strongly. As the anion exchange

SEPLITE ® Strong Acid Cation Exchange Resin The Strong Acid Cation Exchange Resin is the type of ion exchange resin  with functional group of sulfonic acid The Strong Acid Cation Exchange Resins have two types, the gel and the macroporous type. The macroporous strong acid cation exchange resin shows an excellent dynamic characteristics. The gel type has excellent properties for industrial water softening and demineralization application. It has standard crosslinkage, which is usually used in mixed bed; the higher crosslinkage resin shows a longer operating life, and used in regenerable mixed bed. The Strong Acid Cation Exchange Resin shows an excellent physical and chemical stability, which operates at any pH(0-14), and are relatively stable to temperture, even in high temperatures of 100-120℃. The Strong Acid Cation Exchange Resin is applied in a wide variety of fields including water purification, water softening, waste water treatment, purification of pharmaceutical

Separation Technique Based on Ion Exchange & Adsorption Stevioside is mainly extracted from the roots and leaves of stevia leaves, with the highest content of stevioside in leaves. Its sweet taste mainly consists of stevioside A, B, C, D, E. Stevioside can be extracted with water, and after clarification and crystallization, extracts of different purities can be obtained. Stevioside is 250-450 times sweeter than sucrose, but because of the presence of stevioside A, it has a distinct bitter taste and astringency. Our technology in stevioside extraction  is based on the principle of ion exchange and adsorption, using a series supporting separation system to achieve extraction, decolorization, demineralization, purification and other important steps. Our technology has achieved great success in China. Sunresin has conducted in-depth research in the field of stevia refining. Sunresin once hosted the China Stevia Industry Technical Exchange Conference and achieved g

Peptide Synthesis Resins Since Solid Phase Peptide Synthesis was first proposed by Robert Bruce Merrifield, the method of synthetic peptides became more popular than liquid phase peptide synthesis because of high efficiency. This method could assemble a peptide chain rapidly through successive reactions of amino acid derivatives on an insoluble support. Peptide Synthesis Resins The original peptide antibiotics are also biosynthesized and extracted from the culture of polymyxa or aeruginosa. Another synthetic method of peptides is chemical synthesis, which is divided into liquid phase chemical synthesis and solid phase chemical synthesis. The liquid phase method is mainly used for the synthesis of short peptides. The solid phase synthesis method can be used to prepare long-chain peptides, cyclic peptides, and complex. Peptide. The solid phase method is divided into a Boc method and an Fmoc method. It requires the solid phase synthesis of the carrier to achieve the growth of

D emineralization P rocess O f W ater S oftening Water hardness is usually calculated as Ca2+ and Mg2+. Softening resin is a special resin specially used to soften water. It reduces the concentration of calcium and magnesium by ion exchange technology, so that the hardness of water is controlled less than 50 mg/L (CaCO3). Common softening resin is a strong acid cation exchange resin which is typically regenerated with sodium chloride. Industrial water is often softened with a gel strong acid cation exchange resin, and macroporous strong acid cation exchange resin can be used at a high temperature. For a hard water having a high carbonate content, a weak acid cation exchange resin is usually used for softening. Water Demineralization Demineralization is deionization, removing cations and anions in water, also called ion exchange demineralization ; the result is reduced solution soluble solids, so it is also called deashing. The water after demineralization is similar to d

SUNRESIN IS DRIVING THE INNOVATION FOR SEPARATION TECHNIQUES Sunresin is an innovation size exclusion chromatography media , specialized in supplying Ion exchange resins, adsorption & separation resins, equipment solutions and relevant technical services. With almost 20 years of manufacturing experience, it is the listed company in the IER industry (Shenzhen Stock code 300487) which provides a high level of transparency to its customers. Sunresin manufactures about 50,000M ³ of ion exchange resins and adsorbers annually, supplying furthermore customers with tens of adsorption and separation equipment. Sunresin's resin portfolio include about 25 product categories and more than 200 different resin types which are broadly used in industries such as: Water and Waste water treatment, Food Processing, Biotech, Pharmaceuticals, Plant Extraction, Membrane Caustic Soda, Hydrometallurgy, as well as Municipal Water Treatment among others. SUNRESIN IS DRIVING THE INNOVATION

4-(2', 4'-Dimethoxyphenyl-Fmoc-aminomethyl)-phenoxymethyl resin Rink amide resin  is an excellent support for the Fmoc SPPS of peptide amides. This resin is more acid sensitive than Rink Amide-AM and Rink Amide-MBHA resins. Cleavage with high concentrations of TFA can lead to the breakdown of the linker, with the concomitant formation of by-products that can not be removed by simple washes. These problems appear to be minimized through the use of low TFA concentrations or by the addition of trialkylsilanes to the cleavage mixture. Sunresin is an innovation oriented high-tech enterprise. It is specialized in R&D, manufacturing and sales of adsorption and separation polymer resins, equipments and customized solutions including support services. As the first and the only A-share listed company ion exchange resin china  and Adsorption Resin Industry, Sunresin manufactures about 50,000 cubic meters of ion exchange and adsorption resins annually, and supplies customers wit