Method for preparing silver carbonized Raney copper catalyst, catalyst and application

Abstract

The invention discloses a method for preparing a silver carbonized Raney copper catalyst, a catalyst and an application. The method comprises the steps: (1) uniformly mixing Raney alloy particles witha curing system of carbonizable organic matters, and carrying out curing, so as to obtain a catalyst precursor; (2) carbonizing the obtained catalyst precursor at a high temperature under the protection of inert gas, and then, carrying out activation, so as to obtain a carbonized Raney copper catalyst; (3) preparing a mixed solution from soluble organic amine and water, and then, dissolving a soluble silver salt and soluble salts of other auxiliaries, so as to prepare a silver source solution; and (4) adding the carbonized Raney copper catalyst into deionized water, carrying out stirring to form a suspension solution, dropwise adding the silver source solution obtained in the step (3) into the carbonized Raney copper catalyst solution, and carrying out a reaction and washing, thereby preparing the silver carbonized Raney copper catalyst. According to the catalyst disclosed by the invention, alkyne in liquid-phase C4 distillate can be removed until the concentration is 30ppm or less, and the loss rate of 1,3-butadiene is controlled to be 3% or less.

Description

technical field [0001] The invention relates to the field of carbon four selective hydrogenation deacetylene catalysts, and furthermore, relates to a preparation method, catalyst and application of a silver carbonized Raney copper catalyst. Background technique [0002] 1,3-butadiene is an important chemical raw material for the production of synthetic rubber. The cracked mixed carbon four contains about 40-50% of 1,3-butadiene, which is the main source of butadiene. 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 polymerization grade, it is necessary to remove alkyne from the C4 fraction. At present, the industrial separation of butadiene from mixed carbon four mainly adopts two-stage solvent extraction and rectification technology, wherein one stage separates butene, butane, etc. from crude butadiene, an...

AI Technical Summary

Problems solved by technology

Although there are many documents and patents, such as patent CN103170349, US3912789A relates to the addition of promoter metals and can improve the selectivity and stability of the catalyst, but the problem of the low space velocity of the catalyst still cannot be changed

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