Raney copper catalyst, method for preparing same and application of Raney copper catalyst

Abstract

The invention relates to the field of petrochemical engineering, and discloses a Raney copper catalyst, a method for preparing the same and application of the Raney copper catalyst. The Raney copper catalyst comprises carbon and main active components. The carbon is used as a carrier, the main active components are dispersed in the carrier and comprise Zn-doped Raney copper, organic matters capable of being carbonized are carbonized to obtain the carbon used as the carrier, and mixtures with metal copper, metal aluminum and metal zinc are sequentially calcined, alloyed and activated to obtain the main active components; the content of the metal zinc in the Zn-doped Raney copper is 0.01-30% on the basis of the total weight of the Raney copper catalyst. The Raney copper catalyst, the method and the application have the advantage that the content of alkyne in C4 fractions can be effectively lowered when the alkyne in the C4 fractions is removed by means of selective hydrogenation.

Description

technical field [0001] The invention relates to a catalyst for hydrogenation and alkyne removal in petrochemical industry, in particular to a Raney copper catalyst, a preparation method of the Raney copper catalyst, a Raney copper catalyst prepared by the method and applications thereof. Background technique [0002] C 4 Distillate refers to a mixture of various alkanes, olefins, dienes and alkynes containing four carbon atoms, among which 1,3-butadiene is an important chemical raw material for the production of synthetic rubber. Polymerized dienes have high requirements on alkyne impurities. For example, polymerized butadiene requires a purity of more than 99.7% and an alkyne content of less than 50ppm. In order to meet the requirements of the aggregation level, the C 4 The distillate was treated to remove alkyne. [0003] In the industry, alkynes are mainly removed by two-stage solvent extraction and rectification. One stage of extraction separates butene, butane, etc. ...

AI Technical Summary

Problems solved by technology

The catalyst has better selectivity and stability than the prior art, but the catalyst still cannot overcome the problem of low space velocity operation

US3912789A uses Cu as the active component, alumina as the carrier, and the selected additives include Ag, Pt, Pd, Mg, Ni, Co, Cr, Mo, etc. The catalyst has a short active cycle and a service life of only 175-200h

In addition, this catalyst is only suitable for treating C with alkyne content below 0.2 wt%. 4 distillate

US4440956A has improved carrier, uses this catalyst, in C 4 The feed rate is 300mL / h, the hydrogen-alkyne ratio is 4, the hydrogen flow rate is 2.8L / h, and the reaction temperature is 60°C, the remaining alkyne after selective hydrogenation is zero, and the loss of 1,3-butadiene rate can also be controlled within 0.8%, but this catalyst can only handle C with an alkyne content below 0.2% by weight. 4 distillate with low space velocity