A kind of deacetylation hydrogen catalyst and its preparation method and application

A catalyst and auxiliary technology, applied in the field of alkyne hydrogenation catalytic removal, can solve the problems of difficult reaction temperature and pressure control, short catalyst life, low ethylene selectivity, etc., and achieve wide reaction control, high selectivity, and olefin selectivity. high effect

Active Publication Date: 2019-12-17
大连圣得环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of low ethylene selectivity, short catalyst life and difficult control of reaction temperature and pressure in the prior art, the present invention provides a multi-element, high-activity and selective deacetylation hydrogenation catalyst

Method used

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  • A kind of deacetylation hydrogen catalyst and its preparation method and application
  • A kind of deacetylation hydrogen catalyst and its preparation method and application
  • A kind of deacetylation hydrogen catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh PdCl in proportion 2 , Ni(NO 3 ) 2 , Mn(NO 3 ) 2 and Cu(NO 3 ) 2 , the proportioning ratio is shown in Table 1. Dissolve the above components and make them fully mixed in the alcohol (concentration 80%) solution, spray on the supporting carrier γ-Al 2 o 3 The surface of the ball is burned to fix the active components, and the pre-configured hydrazine hydrate reducing solution is used for reduction treatment for 8-12 hours, and the impurity components are eluted with deionized water for 4-12 times, and finally dried at 130 ° C to obtain the catalyst for use .

[0029] Take 50ml of catalyst and put them into a stainless steel reactor of Φ30mm×2.5mm×250mm, feed the raw material gas at 50°C and a pressure of 2.0MPa, and the gas phase space velocity of the raw material gas is 3000h -1 , the inlet acetylene content is 0.50%, and the deacetylation depth is ≤0.1ppm.

Embodiment 2～4

[0031] The preparation method and testing method are the same as in Example 1, the difference is only in the composition of the catalyst, see Table 1 for details.

[0032] Table 1 Embodiment 1-4 Composition and evaluation results of the deykyne hydrogenation catalyst

[0033]

Embodiment 5

[0035] Weigh PdCl 2 , Ni(NO 3 ) 2 , Mn(NO 3 ) 2 and Cu(NO 3 ) 2 , the proportioning is (wt) 0.03%, 0.03%, 0.2% and 0.2% respectively, PdCl 2 Add hydrochloric acid to dissolve into a palladium chloride solution, fully and evenly dissolve it and the remaining components in the food-grade alcohol (concentration 80%) solution, and spray the mixed solution on the γ-Al 2 o 3 The surface of the ball is then burned to fix the active components, and the pre-configured hydrazine hydrate reducing solution is used for reduction treatment for 8-12 hours, and the impurity components are eluted with deionized water for 4-12 times, and finally dried at 130°C for use. Take 50ml of catalyst and put them into a stainless steel reactor of Φ30mm×2.5mm×250mm, feed the raw material gas under the conditions of 80°C and pressure 2.0MPa, and the gas phase space velocity of the raw material is 3000h -1 , the inlet acetylene content is 0.50%, and the deacetylation depth is ≤0.1ppm.

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Abstract

The invention relates to deacetylene hydrogen catalyst and a preparation method and application thereof. The deacetylene hydrogen catalyst is mainly prepared from multicomponent active component, assistant and a supporting carrier; in the active component, active elements Pd and Ni are 0.01-0.05 and 0.01-0.1% of the total mass of the catalyst; assistant elements Mn and Cu are 0.01-0.6% and 0.01-0.9% of the total mass of the catalyst; the supporting carrier gama-Al2O3 is 99.7-99.9% of the total mass of the catalyst. By using the features of mutual activity supplementation of different components and restoring multiple components to reach low value state, the catalysis and concerted catalysis abilities are realized. The effect of the deacetylene hydrogen catalyst is better than that of single active component, and the deacetylene hydrogen catalyst has advantages of high activity, high selectivity, wide reaction control and long service life; moreover, the catalyst is widely applicable to the field of olefin deacetylene hydrogen, and can be applied to a large-scale industrial production.

Description

technical field [0001] The invention relates to the catalytic removal of alkyne hydrogenation in petrochemical alkenes, in particular to the preparation method and application of a multi-element high-activity component de-alkyne hydrogenation catalyst. Background technique [0002] With the transformation of polyolefin process equipment and the expansion of the market, while the demand for deacetylation hydrogen catalysts is increasing, the requirements for its activity and selectivity are also gradually increasing. The existing single noble metal Pd catalyst is difficult to meet the technology of ethylene refining. Indicators, although the Pd catalyst has good ethylene selectivity and high acetylene conversion rate, but the catalyst is gradually deactivated due to easy carbon deposition. [0003] Therefore, how to obtain a catalyst with high activity and long life is a technical problem to be solved urgently in this field. Contents of the invention [0004] In order to s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J21/04B01J37/16C07C7/167C07C11/04C07C11/06C07C5/09
CPCB01J21/04B01J23/8986B01J37/16C07C5/09C07C7/167C07C2521/04C07C2523/89C07C11/04C07C11/06Y02P20/52
Inventor 缪廷春
Owner 大连圣得环保新材料有限公司
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