Industry application and technology of macroporous adsorption resin

Macroporous resin is a kind of synthetic polymer adsorbent with porous three-dimensional structure It is a new type of resin developed on the basis of the application of ion exchanger and other adsorbents It works by virtue of van der Waals' attraction between it and the adsorbed molecule (adsorbate) through its huge specific surface for physical adsorption In practical application, it has strong adsorption capacity for some molecules with similar skeleton structure, such as aromatic ring compounds Macroporous adsorption resin is widely used in the extraction and separation of active components such as saponins, flavonoids, lipids, alkaloids and other macromolecular compounds in pharmaceutical and natural plants To extract ginsenoside, Notoginsenoside, Gypenoside, diosgenin, stevioside, glycyrrhizin, gingko flavonoid internal fat, hawthorn flavone, astragaloside, hesperidin, Epimedium flavone, soybean isoflavone, tea polyphenol, digitalis cardiac glycoside, ephedra powder, naringin, Ilex pubescens flavonoid glycoside, Taxus alkaloid, various natural pigments, Chinese medicine compound drugs, etc The purification, separation and recovery of biochemical products have good results It has been widely used in the purification of antibiotics, vitamins, amino acids, proteins and biochemical pharmacy Macroporous resin adsorption and separation technology is one of the technologies which have great influence on the extraction process of traditional Chinese medicine and drive Zui widely The process is easy to operate, low cost, resin can be used repeatedly, suitable for industrial production According to the calculation of 3 tons of crude drugs put into production every day, the investment in fixed assets is increased by 150000 yuan, and the energy consumption, auxiliary materials, packaging materials, storage and transportation costs saved every year are at least over one million yuan Therefore, it has a strong promotion and application value, and will play a role in promoting the leaping progress of traditional Chinese medicine extraction technology At the same time, macroporous adsorption resin is widely used in the treatment of industrial wastewater and waste liquid For example, the waste water contains benzene, nitrobenzene, chlorobenzene, fluorobenzene, phenol, nitrophenol, aminophenol, bisphenol A, p-cresol, naiphenol, aniline, o-phenylenediamine, p-phenylenediamine, salicylic acid, 2,3 acid, nesulfonic acid and other organic matters, which have good adsorption, recovery and purification effect Moreover, it has strong adaptability to the concentration of harmful substances in the waste liquid, and can reach the one-time standard The utility model can realize the purposes of recycling and reusing harmful substances in industrial production, turning harm into profit and turning waste into treasure Precautions for application of ion exchange resin: 1) storage and transportation ① shall be stored in sealed containers to avoid cold or sun exposure ② storage temperature: 4 ℃ - 40 ℃ ③ the storage period of resin is 2 years, and it can be used only after passing the re inspection for more than 2 years If it is found that the resin is dehydrated, it is not allowed to add water directly to the resin, and a proper amount of concentrated brine should be added first to restore the resin to be wet 2) pretreatment of resin shall be carried out according to the following steps before operation ① pretreatment of cation resin the pretreatment steps of cation resin are as follows: First, use saturated salt water, take the amount equal to twice the volume of the resin to be treated, immerse the resin in salt solution for 18-20 hours, then put all the salt water, rinse with clean water, so that the discharged water does not have yellow color; second, use 2% - 4% NaOH solution, the amount is the same as above, soak in it for 2-4 hours (or small flow cleaning), after putting out the alkali solution, wash the resin until After Zui, use 5% HCl solution, the same amount as above, soak for 4-8 hours, drain the acid solution, and float it to neutral with clear water ② the * step in the pretreatment method of anion resin is the same as that in the pretreatment method of cation resin; then soak in 5% HCl for 4-8 hours, drain off the acid solution, wash with water to neutral; then soak in 2% - 4% NaOH solution for 4-8 hours, drain off the alkali solution, and wash with water to neutral for use 3) There are several situations to prevent resin pollution, one is organic matter and colloidal silicon in raw water; the other is heavy metal pollution; the other is polymer cracking during long-term operation of resin itself, resulting in crushing or exchange capacity reduction, so it is necessary to distinguish the causes of pollution and poisoning.