Preparation method of catalyst for hydrogenation of phthalic acid dicarboxylic ester

Abstract

The invention discloses a preparation method of a catalyst for hydrogenation of phthalic acid dicarboxylic ester. According to the catalyst, an aluminum oxide-monox mixture carrier is adopted; a transitional metal Ni aid is added in the forming stage of the carrier; and noble metal active components Ru or / and Pd are loaded by an equivalent-volume impregnation method. Due to addition of the aid Ni, the activity of the catalyst can be improved, the conversion rate of the phthalic acid dicarboxylic ester and the selectivity of the products can reach over 99 percent, and the using amount of the noble metal can be reduced to a certain degree. The preparation method is simple in preparation process and easy in industrial production.

Description

technical field

[0001] The invention relates to the technical field of catalysis, and relates to a preparation method of a phthalic acid dicarboxylate hydrogenation catalyst. technical background

[0002] Phthalic acid long-chain esters represented by dioctyl phthalate (DOP) (dibutyl phthalate, diisononyl phthalate, butyl benzyl phthalate, phthalate Diisodecyl dicarboxylate, di-n-octyl phthalate) are important plasticizers that have been widely used for many years, but in view of the negative impact of phthalic plasticizers on the human body and the environment, many countries are studying And develop non-toxic green plasticizer products.

[0003] German BASF company (US6248924, US7355084) first developed 1,2-cyclohexane diisononyl plasticizer (DINCH) as a substitute for DOP. The preparation route of this product is for dibasic phthalates The hydrogenation of benzene ring, the catalyst is the eggshell catalyst supported by Ru. Patent US6284917B1 and patent US7893295B2 int...

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