D751chelating ion-exchange resin is cross-linked polystyrene copolymer structure, the introduction of iminodiacetic acid functional group of the weak acid macroporous cation exchange resin, The selectivity of metal ions similar to EDTA, to remove it from the aqueous solution of divalent cations in order of preference is as follows: Cu2+﹥VO2+﹥UO22+﹥Pb2+﹥Ni2+﹥Zn2+﹥Cd2+﹥Fe2+﹥Be2+﹥Mn2+﹥Ca2+﹥Mg2+﹥Sr2+﹥Ba2+﹥Na+

Can be seen from the previous, D751 chelating resin demonstrated two divalent metal ions with high selectivity and high affinity. At the same time have been exchanged divalent metal ions in the low PH of the solution is easy to desorption (regeneration) so that chelation group restore exchange adsorption capabilities.

D750 is a chelating resin with weak acid imide two acetic acid [-CH₂N-(CH₂OOH)₂] on the special macroporous structure of styrene and two ethylene benzene copolymers.It can immobilize and chelate one or more specific cations in a large range or even from a high concentration solution.

D752 is a special strong alkali anion resin, which is mainly used to remove nitrate from aqueous solution，especially groundwater and fish and shrimp aquaculture.The resin has a special skeleton and three ethylamine functional groups, and has a very high selectivity for nitrate.The resin has high exchange capacity, stronger wear resistance and physical stability.

D753 is a chelating resin specially designed for removal of high arsenic in drinking water.The resin can effectively adsorb trivalent arsenic and pentvalent arsenic in water by carrying iron oxide and has high adsorption capacity.Through adsorption of resin, arsenic content in water can be effectively reduced to drinking water safety level.This resin can be continuously regenerated and can maintain a long working cycle. The economic benefit is very high. Because of its unique chemical characteristics, it can be used in neutral and alkaline environments.

D755 is macroporous polystyrene chelating resin with thiourea group ,it is mainly used for selective removal of heavy metal ions in solution, especially for mercury, gold, platinum, palladium and other noble metal ions.D755 is suitable for extracting mercury ions from different solutions, and can reduce the mercury content to less than 5ppb.The resin can also be used in different chemical industries, such as recovering precious metals from waste water from the electronics industry.

D760 is a selective ion exchange resin for removing boron and its salts from aqueous solution.Macroporous structure chelating resin with N- methyl glucosamine and complex anion formed between polyvalent alcohol base and boron，The amine part conduct anion exchange group to form complex anion, thus the adsorption of borate ion is selected.The resin is not affected by salt substances and is strictly required for PH. Complex ions can be formed only in neutral or alkaline solutions, and complex ions are decomposed in acid solutions.