Preparation method of alkyl naphthalene oxidation catalyst

Abstract

The invention relates to a preparation method of alkyl naphthalene oxidation catalyst, which is characterized in that: (1) molecular sieve containing Ti, Fe, A1 and Si and used as a catalytic active monomer is pulverized in a supermicro way; (2) the catalytic active monomer processed by the supermicro pulverization way is put in modified medium solution with 10-40 percent of mass concentration , the mixture is stirred in a closed way, heated to 130-180 degrees and modified for 5-24 hours under the pressure of 0.4MPa to 3.0MPa; (3) the modified catalytic active monomer is dried by a low-temperature and vacuum way, added with high-purity agglomerant containing silicon, shaped by extrusion and processed by drying and baking, and then the oxidation catalyst is prepared. The prepared oxidationcatalyst enables the catalytic oxidation conversion rate and the selectivity of the 2,6-dimethyl naphthalene to be larger than or equal to 98 percent and the single-pass stability life test to be over 500 hours.

Description

technical field [0001] The invention relates to a method for preparing an oxidation catalyst, in particular to a method for preparing an oxidation catalyst for catalytic oxidation of 2,6-dimethylnaphthalene to generate 2,6-naphthalene dicarboxylic acid. Background technique [0002] 2,6-Naphthalene dicarboxylic acid (NDA) is the main monomer for preparing various polyesters, polyurethane materials and liquid crystal polymers. The polyester materials made can be used as high-quality packaging materials and F-class insulating materials, especially in It has a very broad prospect of being applied to fields such as beer bottles and beverage bottles. [0003] Due to the high symmetry in the structure of 2,6-naphthalene dicarboxylic acid (NDA), the polyethylene naphthalate (PEN) obtained by reacting with ethylene glycol has the characteristics of a straight chain polymer and is a kind of good rigidity, High performance material with high strength and thermal workability. Compare...

AI Technical Summary

Problems solved by technology

The catalytic selectivity and conversion rate of Co-Mn-Br catalysts are all low, about ≤95%, which cannot meet the requirements of polyester polymerization and cannot realize large-scale industrial production