Production process of tertiary amyl benzene

Abstract

The invention discloses a production process of tertiary amyl benzene which is prepared by F-C alkylation of benzene and tertiary amyl alcohol. The production process comprises the following steps of: adding 6.53mol of benzene, 0.15mol of AlCl3 and 0.38mol of FeCl3 in a four-opening bottle, reducing the temperature to 0 to 5 DEG C, then adding 1mol of tertiary amyl alcohol by dropping for 1 hour, continuing reaction for 6 hours at the temperature of 0 to 5 DEG C after the dropwise adding, adding water for hydrolysis, standing and layering, separating the organic horizon, washing with water again, layering, absorbing water with calcium chloride, debenzolizing and conducting pressure reduction and distillation, thus obtaining the tertiary amyl benzene. In the production process, lewis acid AlCl3 and FeCl3 are used as catalysts, and the use amount of AlCl3 is reduced properly, thus avoiding the defects caused by only adopting AlCl3 or adopting two acids of AlCl3 and H2SO4 as the catalysts, leading the yield of tertiary amyl benzene to reach 90 percent and the content of isomer to be less than 0.2 percent.

Description

technical field [0001] The invention relates to the field of chemical raw material production, in particular to a production process of tert-amylbenzene. Background technique [0002] Tert-amylbenzene, also known as dimethylethylphenylmethane and p-amylbenzene, is a raw material for organic synthesis and can be used as a new working carrier for medicine, liquid crystal materials and hydrogen peroxide. The molecular formula of tert-amylbenzene is C 11 h 16 , Prepared by F-C alkylation of benzene and tert-amyl alcohol. The technical key of the tert-amylbenzene synthesis process is to control the ratio of isomers in the product. The reaction catalyst represented by aluminum trichloride plays a catalytic role in the tert-amylbenzene synthesis process, and at the same time, it has an isomerization effect on the tert-amyl structure, and because the dissolution of aluminum trichloride in the reaction system is not good, It is prone to the phenomenon that the concentration of lo...

AI Technical Summary

Problems solved by technology

The reaction catalyst represented by aluminum trichloride plays a catalytic role in the tert-amylbenzene synthesis process, and at the same time, it has an isomerization effect on the tert-amyl structure, and because the dissolution of aluminum trichloride in the reaction system is not good, It is prone to the phenomenon that the concentration of local reaction catalyst is too large, which intensifies the occurrence of isomerization reaction

AlCl is used alone in the traditional process 3 or use AlCl 3 and H 2 SO 4 Diacids are used as catalysts. Due to the rearrangement of tert-amyl groups in the F-C reaction process, a large number of sec-amylbenzene isomers are produced, which has the disadvantage of low yield.