3 results about "Dithionite" patented technology

A polymer comprising pyridinium salt moieties, wherein the polymer has the following structure: In this structure, R1 and R6 are each N. At least a portion of R2 and R7 groups in the polymer are each negatively charged counterions selected from the group consisting of carboxylates, nitrates, nitrites, azides, metasilicates, tetraborate, perborates, boronates, oxalatob orates, metaborates, phosphorus-containing anions, halides, sulfates, SO4 -2, HSO4 -1, thiosulfate, dithionite, metabisulfite, persulfate, methanesulfonate, dioctyl sulfosuccinate, 3-sulfopropyl ethoxylate laurylphenyl ether, and combinations thereof. R3, R4, R8, R9, R11, R13, R14, R15, and R16 are each selected from the group consisting of H and groups including one or more carbon atoms. R5 and R10 are any group including one or more carbon atoms. The n is an integer from 2 to about 100,000.

This invention provides a method for preparing an EGFR inhibitor intermediate (compound of formula V), using dithionite as a reducing agent to prepare compound V from compound IV; the preparation method has higher safety and is more conducive to industrial production.

The application discloses a method for treating dibenzene organic pollutants in water bodies, which comprises the following steps: electrolyzing wastewater to be treated and adding dithionite to carry out a redox reaction to obtain purified water; and the wastewater to be treated contains sodium chloride and dibenzene organic pollutants. The method for treating dibenzene organic pollutants in water bodies is carried out under normal temperature and pressure, is mild in reaction, is environmentally friendly, is easy to operate, is low in cost, has good degradation effect on dibenzene organic pollutants in the environment, and has great application potential in the field of environmental pollution treatment.