Preparation method of isopropyl benzene

A technology of cumene and acetophenone, which is applied in the field of hydrogenation of acetophenone into ethylbenzene, which can solve problems such as environmental pollution and poor catalyst stability
CN104230643AActive Publication Date: 2014-12-24CHINA PETROLEUM & CHEM CORP +1
8 Cites 11 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2014-12-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to a preparation method of isopropyl benzene, and mainly solves the problem of poor stability of catalyst in the processes of benzyl alcohol hydrogenolysis and acetophenone hydrogenation. The invention adopts hydrogen and hydrocarbons containing alpha, alpha-dimethyl benzylalcohol and acetophenone as raw materials. The raw materials successively contact with a catalyst A and a catalyst B for reaction under the conditions of molar ratio of alpha, alpha-dimethyl benzylalcohol in the hydrogen / hydrocarbon material being 5-15:1, reaction temperature of 160-240 DEG C, reaction pressure of 0.5-5.0 MPa and volume space velocity of hydrocarbon material of 1.0-10.0 / h. The catalyst A and B catalyst are in the volume ratio of 0.5-3:1, the catalyst A is a Pd catalyst, and the catalyst B is a copper catalyst. The technical scheme can well solve the problem and can be used in industrial production of epoxypropane through dicumyl peroxide method.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for preparing cumene, in particular to a method for preparing cumene by catalytic hydrogenolysis of α,α-dimethylbenzyl alcohol raw materials and converting acetophenone into ethylbenzene through hydrogenation. Background technique

[0002] Propylene oxide (referred to as PO) commercial production methods mainly include chlorohydrin method, co-oxidation method and cumene peroxide cycle method (CHP). In addition, direct oxidation of hydrogen peroxide and direct oxygen oxidation can also be used to produce PO. At present, in terms of propylene oxide production process, European and American countries mainly use co-oxidation method, which can be divided into ethylbenzene co-oxidation method and isobutane co-oxidation method (PO / TBA method) according to raw materials and co-production products. In other areas, the chlorohydrinization process is the main method.

[0003] At the beginning of this century, Japan’s Sumitomo C...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More