Carried molecular sieve catalyst and application thereof in 2,6-naphthalene dicarboxylic acid synthesis

Abstract

The invention discloses a carried molecular sieve catalyst and application thereof in 2,6-naphthalene dicarboxylic acid synthesis, the carrier molecular sieve of the carried molecular sieve catalyst is selected from one of Na-Y type molecular sieve, H-Y type molecular sieve, beta type molecular sieve, USY type molecular sieve and mordenite molecular sieve, the active component of the carried molecular sieve catalyst is zinc or cadmium, the load capacity of the active component is 7 to 10%. In the invention, the carried molecular sieve catalyst is used for the synthesis of 2,6-naphthalene dicarboxylic acid, the synthesis method takes 1,8-naphthalene dicarboxylic acid as raw material, has reasonable process, lower production cost, safety and reliability, high reaction yield, high product purity, no ''three wastes'' (waste gas,waste water and industrial residue), application value and social benefit and economic benefit.

Description

Supported molecular sieve catalyst and its application in the synthesis of 2,6-naphthalene dicarboxylic acid (1) Technical field The invention relates to a supported molecular sieve catalyst and its application in the synthesis of 2,6-naphthalene dicarboxylic acid, in particular to a synthesis method of 2,6-naphthalene dicarboxylic acid. (2) Background technology 2,6-Naphthalene dicarboxylic acid and its derivatives are important monomers for the preparation of various polyesters, polyurethane materials and liquid crystal polyester resins. Existing 2, the synthetic method of 6-naphthalene dicarboxylic acid has many kinds, has 1) Heinkel method, comprises disproportionation method and isomerization method; 2) 2,6-dialkyl naphthalene oxidation method (alkyl Can be methyl, ethyl and isopropyl, etc.), wherein the oxidation of 2,6-diisopropylnaphthalene to prepare 2,6-naphthalene dicarboxylic acid is the most common, the reaction of this method to synthesize 2,6-naphthalene di...

AI Technical Summary

Problems solved by technology

The first technical problem to be solved by the present invention is to overcome the defects of small specific surface area and poor catalytic effect of existing catalysts, and provide a new type of supported molecular sieve catalyst

Images