Resorcinol Process Optimization And Styrene Chloromethylation

Resorcinol is an important fine organic intermediate, the technics at home gives low resorcinol yield but too many pollutants polluting the environment seriously. The technics of resorcinol from diisoprorylbenzene can offer us a better environmental effect, fewer pollutants, a higher material using ratio and a larger market for subsidiary productions, but need too much investment, too high technics.This paper has studied a novel process for producing resorcinol from benzene as a starting material. More specifically it relates to a process that benzene is suifonated by 98% sulphuric acid, disulfonated by gas sulphur trioxde, neutralized and fused with NaOH to form the sodium salt of resorcinol, acidified with hydrochlororic acid to form resorcinol. It improves resorcinol yield, gives low subsidiary products yield to pollute the environment.Chloromethylstyrene (CMS) is an important fine organic intermediate. This paper introduces phase-transfer catalysis technique, CMS is synthesized by chloromethylation of formaldehyde and hydrochloric acid to styrene. Under the optimum reaction conditions that formaldehyde is 1.2 mol of styrene, sulphur is 0.3 g of styrene, the reaction time is 5 hours and the reaction temperature is 80℃, the yied of CMS is improved. And the yield of a subsidiary production 4-phenyl-1,3-dioxane was increased largely.