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This post was last edited by ljtjbx on 2015-11-18 at 12:54. An introduction to the types and uses of macroporous adsorption resins: 1. D101 macroporous adsorption resin. Macroporous adsorption resins are artificially synthesized polymer adsorbents with a porous, spongy structure; they rely on the van der Waals forces between the resin framework and the molecules to be adsorbed (adsorbates), and through their large specific surface area, they achieve physical adsorption in order to separate and extract organic macromolecules with poor water solubility from aqueous solutions. The use of macroporous adsorption resins to extract active components from traditional Chinese herbs, such as saponins, flavonoids, and alkaloids, offers advantages including simple operation, low cost, and the ability to reuse the resins, making it suitable for industrial-scale production. D101 resin is a non-polar adsorbent with a specific surface area of 480–530 m2/g. Purpose: Extraction of saponins such as gypenosides, notoginsenosides, and camptothecin, as well as alkaloids. 2. D101B macroporous adsorption resin: a weakly polar adsorbent with a specific surface area of 450–500 m2/g. It is a refinement and improvement of D101 resin; although its specific surface area is slightly lower than that of D101, the presence of weakly polar groups on the surfaces of the pores within the resin enables it to adsorb yellow-colored organic compounds with poor water solubility at a faster rate and in larger quantities, as the diffusion from the aqueous phase into the resin phase is more difficult for such compounds. Use: Extraction of ginkgolides, tea polyphenols, astragalin, etc. 3. XDA-1 macroporous adsorption resin: The Tietu brand XDA-1 macroporous adsorption resin is a non-polar polymer adsorbent with a high degree of cross-linking, a high specific surface area, and no functional groups. Its continuous polymer phase and continuous pore structure endow it with excellent adsorption properties. The polymer structure of XDA-1 endows it with excellent physical, chemical, and thermal stability. Depending on the properties of the adsorbed medium, XDA-1 can be regenerated using propane, methanol, or dilute alkaline solutions, allowing it to be reused in cyclic industrial processes. Uses: XDA-1 is mainly used by companies that produce phenol, companies that manufacture dye and chemical intermediates, as well as other companies in the chemical, pharmaceutical, and pesticide industries. It can also be used to separate and remove organic compounds such as anilines, benzyl chloride, benzyl alcohol, chlorobenzenes, sorbic acid, and halohydrocarbons from aqueous solutions containing large amounts of inorganic salts; it can also be employed for the enrichment of non-polar substances in other polar solvents. 4. XDA-1B macroporous adsorption resin: an adsorbent with weakly polar groups, with a specific surface area of 500–600 m2/g. It is a supplement and improvement to XDA-1 resin. Although its specific surface area is smaller than that of XDA-1, the presence of weakly polar groups on the surfaces of the pores within the resin allows it to adsorb organic compounds with poor water solubility at a rapid rate and in large quantities, as there is less resistance to their diffusion from the aqueous phase into the resin phase. Advertisement in the text: For supply of epoxy resin reactive toughening agents, contact 13513318968, 031189276098. 5.XDA-7 uniform-porosity decolorizing resin: A specialized resin for decolorization, synthesized using specific cross-linking agents and processes; it is a strongly basic resin containing quaternary amine groups. It features a uniform cross-linked structure, a narrow pore size distribution range, and a large average pore size, making it suitable for removing negatively charged pigments and large molecular organic substances with a molecular weight between 200 and 10,000. It can also be used for the adsorption and desorption of electrically neutral pigment molecules with a certain degree of hydrophobicity. XDA-7 resin has strong selectivity for pigments, is easy to regenerate, and can recover easily after being contaminated by organic substances. Applications: XDA-7 is widely used in industrial processes such as antibiotic purification, extraction of biochemical products, the food industry, and the chemical industry. 6. H-10 hydrogen peroxide-decomposed organic carbon: white, opaque spherical particles; a non-polar adsorbent with good stability in hydrogen peroxide, and a specific surface area of 830–850 m2/g. It can effectively remove anthraquinone compounds from hydrogen peroxide, significantly reducing its organic carbon content. The treated hydrogen peroxide can be used directly for fabric bleaching. Used in combination with H-10A and H-10B, it can remove all organic carbon and metal ions from hydrogen peroxide, thereby producing highly pure hydrogen peroxide that meets the standards required by the microelectronics industry. 7. Extraction of active ingredients from Chinese herbal medicines such as H-20 saponins and alkaloids; white, opaque spherical particles, non-polar adsorbent, with a specific surface area of 520–560 m2/g. Used for the extraction of saponins and alkaloids. 8.H-30 is used for the extraction of stevioside; it enables the extraction and separation of white, opaque spherical particles. It is a weakly polar adsorbent with a specific surface area of 480–520 m2/g. Suitable for stevioside and flavonoid extracts. 9. H-40: White, opaque spherical particles used as an organic matter scavenger in water treatment; a weakly polar adsorbent with a specific surface area of 460–510 m2/g. It is used as a protective column before ion exchange columns in water treatment processes where COD is above 20 ppm, to protect the subsequent ion exchange columns from organic contamination. 10 H-50: an advanced fatty acid ester used for removing white, opaque spherical particles; it is a non-polar adsorbent with a specific surface area of 400–430 m2/g. Due to their high alcohol content, medium-to-high alcohol spirits prevent the higher fatty esters from precipitating out. Low-alcohol baijiu with an alcohol content of 30 degrees or less, due to its low alcohol content, causes higher fatty acid esters such as ethyl oleate, ethyl linoleate, and ethyl palmitate to precipitate at low temperatures, which affects the appearance of the liquor. Low-alcohol beverages can have their long-chain fatty acid esters removed using H-50 without affecting the flavor of the beverage. 11. H-60 alkaloid and flavonoid extract: white, opaque spherical particles; a weakly polar adsorbent with a specific surface area of 540–580 m2/g. Suitable for the extraction of alkaloids and flavonoid-type organic compounds