Preparation method of isopropylbenzene and obtained isopropylbenzene

A technology for cumene and propylbenzene catalysts, which is applied in chemical instruments and methods, catalyst activation/preparation, and hydrocarbon production from oxygen-containing organic compounds, etc., can solve the problems of acetophenone hydrogenation, low selectivity of cumene, and catalyst Poor stability and other issues
CN112569930AInactive Publication Date: 2021-03-30CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2021-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of isopropylbenzene and the obtained isopropylbenzene, and the preparation method comprises the following steps: step 1, loading a compound containing a metal active component and a carbon-containing precursor on an alumina carrier, and then conducting drying and roasting to obtain an isopropylbenzene catalyst; and step 2, in the presence of the isopropylbenzene catalyst, carrying out a reaction on an organic material containing alpha,alpha-dimethyl benzyl alcohol and hydrogen as raw materials to prepare the isopropylbenzene. The isopropylbenzene catalyst prepared in the step 1 contains residual carbon, the effect of passivating the catalyst is achieved, excessive hydrogenolysis hydrogenation of alpha,alpha-dimethyl benzyl alcohol and hydrogenation of acetophenone in an organic material can be inhibited in the reaction in the step 2, the isopropylbenzene selectivity is effectively improved, the ethylbenzene content in the product is controlled, the later separation cost is reduced, and the Pd-based catalyst has good stability in preparation of isopropylbenzene by hydrogenolysis of alpha,alpha-dimethylbenzyl alcohol, and has high industrial application value.
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Description

technical field

[0001] The invention relates to the preparation of cumene, in particular to a method for preparing cumene by hydrogenolysis of dimethyl benzyl alcohol. Background technique

[0002] At the beginning of this century, Sumitomo Chemical Company developed a new process for producing PO with CHP as an oxidant, mainly including oxidation of cumene, epoxidation of propylene, recovery and refining of propylene and PO, hydrogenolysis of α,α-dimethylbenzyl alcohol and Separation of harmful impurities and other processes. The process has the following advantages: the conversion rate and selectivity of the whole process are very high; the product is only PO, there is no co-production product, and it is not affected by the price fluctuation of by-products, which can bring more stable economic benefits to the manufacturer; the process flow Compared with the co-oxidation method with ethylbenzene, it is relatively simple; and it has lower requirements for equipment anticorr...

Claims

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