2 results about "Borohydride" patented technology

The invention discloses a treatment method for nitrile rubber production wastewater. The method comprises the following steps of: a, adjusting the pH value of nitrile rubber production wastewater to be greater than 7, and mixing the wastewater, the pH value of which is adjusted, with borohydride and aluminum chloride to reduce acrylonitrile in the wastewater; and b, performing coagulation and air-flotation treatment, hydrolytic acidification treatment, activated sludge treatment and purification treatment in a biological aerated filter sequentially on the wastewater reduced by acrylonitrile. The wastewater treated by the method disclosed by the invention is basically free of acrylonitrile residues, and the COD value is less than 50 mg/L and the ammonia nitrogen content is less than 5 mg/L. The wastewater is colorless and transparent in appearance and the effluent water quality is relatively high.

The invention provides a purifying agent for a compound containing aldehyde impurities and application of the purifying agent. The purifying agent comprises borohydride of alkali metal and hydrazine hydrate, wherein the molar percentage of the borohydride of alkali metal is 2-20%, and the molar percentage of the hydrazine hydrate is 80-98%. When the purifying agent is added in the rectification and purification process of crude epoxypropane or crude isopentenyl alcohol containing 50-1000 ppm of aldehyde impurities, the content of the aldehyde impurities can be reduced to 20 ppm or below. The problems that in the prior art, the removal efficiency of impurity aldehydes in the crude epoxypropane or crude isopentenyl alcohol is low, and the purity of the obtained product is limited are solved. The purifying agent provided by the invention is high in impurity removal efficiency and convenient to apply.