Method for preparing benzalcohol by hydrogenation of hydrogen peroxide cumene

Abstract

The invention relates to a method for preparing benzoic alcohol through hydrogenation of cumene hydroperoxide. The method comprises the following steps that cumene hydroperoxide and hydrogen pass through a reactor containing hydrogenation catalyst; the reactor adopts an ebullated bed reactor of a high-efficiency mass transfer and heat transfer reactor; a reaction raw material is fed in from the bottom of the reactor; and materials are discharged from the top of the reactor after reaction, and hydrogen is recycled after deoxidation. Through adopting strong mass transfer and heat transfer reactors such as the ebullated bed reactor to carry out hydro catalytic reduction for CHP, the method solves the problems of reaction mass transfer and heat transfer during reaction; a deoxidation reactor is arranged on a hydrogen circulation line, so the method solves the problem of stability during reaction. Moreover, the process of the method can realize continuous production, and does not discharge the three wastes during production, thereby preventing environmental pollution.

Description

technical field [0001] The present invention relates to a kind of method of producing alcohol by peroxide, specifically the method for preparing benzyl alcohol by hydrogenation of cumene hydroperoxide. Background technique [0002] Dicumyl peroxide (DCP for short) is a commonly used symmetrical di-tertiary alkyl peroxide. It is mainly used as a crosslinking agent for polyethylene, chlorinated polyethylene, and polystyrene, and secondly as a polymerization initiator. agent and blowing agent for ethylene-vinyl acetate copolymer. [0003] Theoretically speaking, there are multiple synthetic methods of DCP, such as US 3829503, DE2016108, etc. These methods all have the following disadvantages: the one is multi-step reaction and each step is intermittent production; the 2nd, the synthetic methods of these DCP all use Cumyl hydroperoxide (abbreviated as CHP) is used as a reaction intermediate product, and CHP belongs to aralkyl hydroperoxide, which is very unstable to acid, alkal...

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Problems solved by technology

[0003] Theoretically speaking, there are multiple synthetic methods of DCP, such as US 3829503, DE2016108, etc. These methods all have the following disadvantages: the one is multi-step reaction and each step is intermittent production; the 2nd, the synthetic methods of these DCP all use Cumyl hydroperoxide (abbreviated as CHP) is used as a reaction intermediate product, and CHP belongs to aralkyl hydroperoxide, which is very unstable to acid, alkali, heat, reducing agent, heavy metal ion, etc. All th

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