Inner framework metal high-silicon beta molecular sieve catalyst as well as preparation method and application thereof

Abstract

The invention discloses an inner framework metal high-silicon beta molecular sieve catalyst which comprises the following raw materials in parts by weight (100 parts by weight): 1-8 parts of copper, 1-5 parts of zinc, 0.1-2 parts of lanthanum and the balance of a silicon-aluminum type boron-containing beta molecular sieve. Meanwhile, the invention discloses a preparation method of the catalyst and application of the catalyst in preparation of butanediamine, and the preparation method comprises the following steps: (1) grinding the silicon-aluminum type boron-beta-containing molecular sieve, and conducting sieving with a 80-100-mesh sieve; and (2) mixing the amino acid complex solutions of copper, zinc and lanthanum according to the weight parts of the raw materials in the catalyst to obtain an amino acid metal complex solution, adding the ground and sieved silicon-aluminum type boron-beta-containing molecular sieve, conducting grinding, and carrying out ion lattice exchange, filtration, washing and drying. According to the catalyst provided by the invention, loading of metal atoms on an inner framework of the beta molecular sieve and monatomic confinement are realized, and when the catalyst is used for preparing butanediamine, byproducts are few, and the product selectivity is high.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to an inner skeleton metal high-silicon beta molecular sieve catalyst and a preparation method and application thereof. Background technique [0002] 1,4-Butanediamine, also known as putrescine, has the molecular formula H 2 N(CH 2 ) 4 NH 2 , Colorless flaky crystals, smelly, soluble in water, ethanol, slightly soluble in ether. The relative density is 0.877, the melting point is 27~28℃, and the boiling point is 158~159℃. It is used as the main raw material for chemical intermediates and polyamide synthetic materials. [0003] Butylenediamine is mainly used to synthesize nylon 46, a new type of polyamide material. Polyamide 46 was first industrialized in 1984 by the Dutch DSM company. As early as the 1930s, DuPont conducted research on the synthesis of polyamide 46 and produced polyamide 46 with low molecular weight. In 1979, the solid-state polycondensation meth...

AI Technical Summary

Problems solved by technology

This method uses highly toxic acrylonitrile and hydrocyanic acid as raw materials, the cost of raw materials is high, the toxicity is high, the reaction process is long, and the product yield is low

Chinese patent CN101735067A discloses a method of using 1,4-dibromobutylamine as a raw material to prepare phthalimide imine butane by reflux of potassium phthalimide butane and then methylating it to produce 1,4-butanediamine , also has the disadvantages of long process flow and expensive raw materials