3 results about "Benzyl chloride" patented technology

The invention relates to the field of production preparation of compounds, in particular to preparation and purification methods of 4-biphenylacetic acid. The preparation and purification methods comprise steps as follows: 1) biphenyl is subjected to a chloromethylation reaction to produce 4-phenyl benzyl chloride; 2) 4-phenyl benzyl chloride reacts with sodium cyanide to produce 4-biphenyl acetonitrile; 3) 4-biphenyl acetonitrile is hydrolyzed and a crude 4-bphenylacetic acid product is obtained; 4) the crude 4-bphenylacetic acid product and methanol are subjected to an esterification reaction to produce 4-biphenyl methyl acetate, 4-biphenyl methyl acetate is purified and hydrolyzed into 4-biohenylacetic acid, 4-bihenylacetic acid is refined, and a finished product is prepared.

The invention relates to the field of quaternary ammonium salt production, in particular to a production process of mixed quaternary ammonium salt. The production method includes: tertiary amine of C12-C12 mixed carbon to react with benzyl chloride to produce alkyl dimethyl benzyl ammonium chloride; using tertiary amine of C12-C14 mixed carbon to react with ethyl benzyl chloride to generate alkyl dimethyl ethyl benzyl ammonium chloride; mixing and compounding the alkyl dimethyl benzyl ammonium chloride with the alkyl dimethyl ethyl benzyl ammonium chloride according to a certain proportion to produce cation mixed quaternary ammonium salt. The production process has the advantages that the process is complete, free amine content is low and is less than or equal to 1, and the mixed quaternary ammonium salt is convenient for customers to use in the aspect of fluidity.