Catalyst for hydrogenating and purifying crude 2,6-naphthalic acid and preparation method of catalyst

Abstract

The invention relates to a catalyst for hydrogenating and purifying crude 2,6-naphthalic acid and a preparation method of the catalyst, aiming at solving the problems that the crude 2,6-naphthalic acid can be excessively hydrogenated to generate 2,6-dicarboxyl tetrahydronaphthalene when being subjected to hydrogenation and purification in the prior art. According to the catalyst, carbon-covered aluminum oxide is used as a carrier, Pd is used as an active component, and Mo and W are used as catalyst promoters; the content of carbon in the carbon-covered aluminum oxide is 5-15wt%, the Pd content of the catalyst is 0.1-1wt%, and the Mo content is 0.1-1wt%; and the mass ratio of Mo to W is 1: (0.1-1). The catalyst can solve the problem well and can be used for industrial production of hydrogenation and purification of the crude 2,6-naphthalic acid.

Description

technical field

[0001] The present invention relates to a kind of catalyst that is used for crude 2,6-naphthalene dicarboxylic acid hydrogenation purification and preparation method thereof, and described catalyst produces air by 2,6-dimethylnaphthalene in the presence of Co-Mn-Br catalyst Application in hydrogenation purification of crude 2,6-naphthalene dicarboxylic acid obtained by oxidation. Background technique

[0002] 2,6-Naphthalene dicarboxylic acid (2,6-NDCA) is an important monomer for the preparation of various polyesters, polyurethane materials and liquid crystal polyester resins (LCP), especially prepared by the reaction of 2,6-NDCA and ethylene glycol The new high-performance polyester-polyethylene 2,6-naphthalate (PEN) has high strength, superior heat resistance, gas barrier properties, light resistance, chemical resistance, etc., and can be used to make films, food And beverage containers, fibers, magnetic base tapes, electronic components, etc. In additio...

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