US 12,091,375 B2 · Preparation method for triphenylchloromethane

Abstract

Disclosed is a preparation method for triphenylchloromethane, comprising the following steps: adding hydrochloric acid or a mixture of hydrochloric acid and Lewis acid to a mixture of triphenylmethanol and an organic solvent; stirring for reaction; removing the water layer after the completion of reaction to obtain an organic solution containing triphenylchloromethane. In the method, the conversion rate of triphenylmethanol is almost quantitative to be above 99%, and the content of triphenylchloromethane in the product obtained is above 99%. The operation is simple, and no waste gas is generated. Therefore, the method is environmentally friendly and suitable for industrialized production and can achieve better economic benefits.

Claims19

Dependent claims

A method for preparing triphenylchloromethane, comprising the following steps:

adding a mixture of hydrochloric acid and Lewis acid to a mixture of triphenylmethanol and an organic solvent, reacting at 5-35° C. under stirring, separating a product from an organic phase after the reaction is completed to obtain a solid containing triphenylchloromethane;
and
obtaining triphenylchloromethane after drying;
wherein the reaction scheme is as follows:
wherein the molar concentration of hydrochloric acid is 1-10 mol/L and
wherein the molar ratio of hydrochloric acid to Lewis acid is 1.1-1:0.01.

3 more elements

Dependencies are inferred from the claim text.

Preparation method for triphenylchloromethane

Life of this patent

Preparation method for triphenylchloromethane

Life of this patent

Abstract

Claims19