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Physical and chemical performance indicators of Suqing brand macroporous adsorption resin

Suqing brand	Specific surface area （m2/g）	Average aperture（nm）	Pore volume （ml/g）	Wet apparent density （g/ml）	Wet specific gravity （g/ml）	水份 （%）	Use
DA201-B	500-600	8-9	1.1-1.2	0.65-0.70	1.03-1.07	50-60	Non polar macroporous adsorption resin is mainly used for the extraction and separation of stevia and other natural products.
DA201-C	900-1100	3-5	1.0-1.1	0.68-0.75	1.03-1.10	50-60	Large mesh non polar adsorption resin is mainly used for adsorption and separation of phenols and other aromatic compounds from wastewater. Large adsorption capacity.
DA201-CII	1000-1300	3-4	1.1-1.3	0.65-0.75	1.03-1.10	60-70	Large mesh non polar adsorption resin, mainly used for the treatment of fruit juice, has good decolorization, odor removal, and the ability to remove patulin and pesticide residues.
DA201-D	600-800	5-7	1.2-1.4	0.62-0.72	1.02-1.07	62-72	Non polar macroporous adsorption resin is mainly used for the treatment of fruit juice and has good decolorization ability.
DA201-E	800-1000	4-6	1.2-1.4	0.62-0.72	1.02-1.08	60-70	Large mesh non polar adsorption resin. It has a high specific surface area and strong adsorption capacity. It can be used for the adsorption of various organic substances.
DA201-G	300-500	5-7		0.72-0.82	1.05-1.20	50-60	Polar adsorption resin in bromination. Especially suitable for the adsorption of compounds with easily polarized groups.
DA201-H	＞800	5-6	1.2-1.4	0.65-0.70	1.02-1.07	55-65	Adsorption, separation of antibiotics, stevia sugar, and ginsenosides, with a large adsorption capacity.
DA201-M8	400-600	6-8	1.0-1.3	0.62-0.72	1.02-1.08	55-65	Macroporous non polar adsorption resin is mainly used for the adsorption and separation of stevia and ginsenosides, with good selectivity.
DA201-ACA	＞1100	5-8	1.4-1.8	0.63-0.73	1.03-1.10	55-65	Macroporous non polar adsorption resin is mainly used for the adsorption and purification of cephalosporin C.

2、 The main uses of Suqing brand macroporous adsorption resin
The use of macroporous adsorption resin is very extensive, and only a few items are listed as follows:
1. Environmental protection
Utilizing the high specific surface area of macroporous adsorption resin to adsorb organic compounds in wastewater, such as benzene, chlorobenzene, nitrobenzene, phenol, benzoic acid, benzyl alcohol, niacin, and other aromatic compounds; Aliphatic compound such as hydrocarbons and chlorinated hydrocarbons. wait. Not only has wastewater been treated, but raw materials have also been recycled. You can get more with one move.
2. Processing and refining of industrial by-products
In the production of chlorobenzene, a large amount of hydrochloric acid will be produced as a byproduct. However, the presence of small amounts of benzene and chlorobenzene affects its application. After removing benzene and chlorobenzene by adsorption with adsorption resin, the quality of by-product hydrochloric acid is greatly improved and widely used.
3. Processing and refining of food and beverage
Macroporous adsorption resins have been widely used in the processing of fruit juice, such as decolorization of apple juice, pear juice, grapefruit juice, etc., removal of bitterness and astringency, as well as removal of patulin and pesticide residues. Macroporous adsorption resins are also widely used for removing odors from starch sugars.
4. Separation and extraction of natural products
Macroporous adsorption resins are widely used in the extraction of natural products, such as stevia, various saponins, flavonoids, and active ingredients of traditional Chinese medicine. wait. And adsorption resin plays a crucial role in it.
5. Extraction and Separation of Drugs and Their Intermediates
Adsorption resins have also been widely used in the chemical or biological synthesis of drugs and their intermediates. For example, vitamin B12, cephalosporin C, etc.
3、 The Use and Regeneration Method of Suqing Brand Macroporous Adsorption Resin
From the above description, it can be seen that adsorption resins have a wide range of uses. Due to the different adsorption targets, their usage and regeneration methods also vary. It is difficult to provide a unified answer. But there are the following common points to refer to:
1. Among the existing adsorption resins, most are non polar or weakly polar. If its internal moisture is lost during storage, its performance will be greatly reduced. To determine whether the adsorption resin has lost water, it mainly depends on whether it floats in large quantities on the water surface.
2. If the resin loses some or all of its moisture, it should be soaked in polar organic solvents such as methanol, ethanol, or acetone for several hours. Then wash off the polar solvent with water, and the resin can be used.
3. The target substances adsorbed by adsorption resin treatment are all organic molecules or ions, which are generally larger and move slowly in the medium. Therefore, when using adsorption resin, the flow rate is generally slower, such as 5-10m/h.
4. Analysis and regeneration of adsorption resin:
4.1. Due to the different adsorbed substances, the types of analytical agents also vary greatly. But there are two principles for the selection of analytical agents, effective and cheap, that is, to try to be as cheap as possible while ensuring the analysis effect.
4.2. Analysis is the reverse process of adsorption. Therefore, the choice of the adsorbent is to maximize the solubility of the adsorbed substance in the adsorbent. For example, phenol has weak acidity, so adsorption should be carried out in a neutral acidic environment, while dilute NaOH can be used for its resolution. For example, aniline has weak alkalinity, so adsorption should be carried out in a neutral to alkaline environment, while dilute HCl can analyze it.
4.3. Some adsorbed substances, such as benzene, chlorobenzene, and low molecular weight fatty hydrocarbon compounds, have low water solubility and low boiling points. At this point, steam can be directly introduced into the adsorption column for thermal regeneration. The condensate can be separated from oil and water to recover the adsorbed organic matter.
4.4. The solubility of some organic substances is very sensitive to temperature. This type of substance can be adsorbed at lower temperatures and desorbed at higher temperatures without the need to introduce other analytical agents. Like phenylalanine, it can be adsorbed by DA201-C at room temperature near its isoelectric point, and water can resolve it from the resin at around 80 ℃.
Sometimes, due to the strong adsorption capacity of the resin on the target substance, it causes difficulties in analysis. At this point, joint analysis can be considered. For example, using alkaline or acidic ethanol while increasing the temperature of the analyte, etc.
Sometimes, in order to improve the purity of the target substance in the analytical solution, the best analytical agent is not selected. In the production of stevia, instead of using 95% alcohol as the resolving agent, approximately 55% -65% ethanol is used.
Sometimes, in order to simplify the entire system, the cheapest analytical agent is not chosen. For example, in the treatment of phenol containing wastewater from the production of bisphenol A, acetone is used to analyze the phenol adsorbed by DA201-C instead of NaOH solution. Because acetone is required in the bisphenol A system, using acetone for analysis makes the entire system simpler.
In short, although the selection of analytical agents is complex, there are certain rules to follow. Namely: effective, inexpensive, and compatible with production requirements and systems.