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1-butene catalyst prepared through selective hydrogenation of butadiene as well as preparation method and application thereof

A technology for selective hydrogenation and butadiene, applied in catalysts, metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, etc. Advanced problems, to achieve the effect of high catalytic activity, reduced loss, and stable online operation

Active Publication Date: 2018-11-20
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is to provide a butadiene selective hydrogenation catalyst for the problems of low hydrogenation selectivity of butadiene and alkynes, large loss of monoolefins and low catalytic activity of existing catalysts. Catalyst for preparing 1-butene and its preparation method, the catalyst is characterized by high hydrogenation selectivity to butadiene and alkyne, and has high reactivity and stability at the same time

Method used

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  • 1-butene catalyst prepared through selective hydrogenation of butadiene as well as preparation method and application thereof
  • 1-butene catalyst prepared through selective hydrogenation of butadiene as well as preparation method and application thereof
  • 1-butene catalyst prepared through selective hydrogenation of butadiene as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Catalyst preparation

[0053] Take by weighing 70.00 grams of gamma-alumina, pseudo-boehmite with a quality equivalent to 20.00 grams of alumina, 6.00 grams of asparagus powder, 45.00 grams of citric acid monohydrate, 44.35 grams of magnesium nitrate hexahydrate (256.41), add poly Add 18.00 grams of vinyl alcohol aqueous solution (mass concentration: 5%), add 150 ml of water, extrude, dry at 80°C for 4 hours, dry at 120°C for 6 hours, and roast at 980°C for 4 hours to obtain a modified carrier .

[0054] The modified carrier was impregnated with an equal volume of 7.00 grams of manganese nitrate aqueous solution (mass concentration: 50%) (178.95) for 8 hours. After the impregnation was completed, it was aged at room temperature for 6 hours, dried at 80°C for 4 hours, and dried at 120°C for 6 hours. hour, roasting at 400°C for 4 hours to obtain a catalyst precursor; prepare an aqueous solution with a concentration of palladium nitrate dihydrate (266.46) of 0.10mol / L ...

Embodiment 2

[0060] 1. Catalyst preparation

[0061] Take by weighing 71.00 grams of gamma-alumina, pseudo-boehmite whose quality is equivalent to 20.00 grams of alumina, 6.00 grams of asparagus powder, 45.00 grams of citric acid monohydrate, 19.64 grams of magnesium nitrate hexahydrate (256.41), add poly Add 18.00 grams of vinyl alcohol aqueous solution (mass concentration: 5%), add 150 ml of water, extrude, dry at 50°C for 4 hours, dry at 120°C for 6 hours, and roast at 980°C for 4 hours to obtain a modified carrier .

[0062] The above-mentioned modified carrier and 21.20 grams of manganese nitrate aqueous solution (mass concentration: 50%) (178.95) were impregnated in an equal volume for 8 hours. After the impregnation was completed, it was aged at room temperature for 5 hours, dried at 80° C. for 4 hours, and dried at 120° C. for 6 hours. hour, roasting at 500°C for 4 hours to obtain a catalyst precursor; prepare an aqueous solution with a concentration of palladium nitrate dihydrate...

Embodiment 3

[0067] 1. Catalyst preparation

[0068] Take by weighing 71.00 grams of gamma-alumina, pseudo-boehmite whose quality is equivalent to 20.00 grams of alumina, 6.00 grams of asparagus powder, 45.00 grams of citric acid monohydrate, 32.95 grams of magnesium nitrate hexahydrate (256.41), add poly Add 18.00 grams of vinyl alcohol aqueous solution (mass concentration: 5%), add 150 ml of water, extrude, dry at 70°C for 3 hours, dry at 100°C for 5 hours, and roast at 1100°C for 4 hours to obtain a modified carrier .

[0069]The above-mentioned modified carrier and 14.00 grams of manganese nitrate aqueous solution (mass concentration: 50%) (178.95) were impregnated in an equal volume for 8 hours. After the impregnation was completed, it was aged at room temperature for 4 hours, dried at 80° C. for 4 hours, and dried at 120° C. for 6 hours. hour, roasting at 550°C for 4 hours to obtain a catalyst precursor; prepare an aqueous solution with a concentration of palladium nitrate dihydrate...

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Abstract

The invention relates to a 1-butene catalyst prepared through selective hydrogenation of butadiene as well as a preparation method and application thereof. The butadiene selective hydrogenation catalyst adopted in the invention comprises the following components in percentage by mass: (a) 0.02-0.60% of metal palladium or oxides thereof; (b) 1.0-10.0% of alkaline-earth metals or oxides thereof; (c)0.5-7.0% of an assistant X1 or oxides thereof; (c) 0.1-3.0% of an assistant X2 or oxides thereof; (d) the balance of a carrier alumina. The catalyst disclosed in the invention can be used for the selective hydrogenation reaction of materials containing trace butadiene. Problems in the prior art that the catalyst is high in preparation cost, poor in stability, short in life, poor in selectivity ofbutadiene and extremely high in loss of 1-butene are mainly solved.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation catalysts, and relates to a catalyst for preparing 1-butene through selective hydrogenation of butadiene, a preparation method and application thereof. Background technique [0002] In addition to ethylene, the cracking products of the ethylene cracking unit also produce a large amount of C4 hydrocarbons, the main components of which are butadiene, 1-butene, isobutene, n-butane, isobutane, vinyl acetylene, and ethyl acetylene. Butadiene and alkyne can be recovered and utilized through rectification, extraction and other processes in the butadiene plant in the early stage, and the remaining material is the raffinated carbon four components. In addition to 1-butene, isobutene and butane, its components still contain a small amount of butadiene. One of the main functions of the 1-butene plant is to produce polymer-grade 1-butene. As a basic chemical raw material, 1-butene is mainly used as a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656C07C5/05C07C11/08
CPCC07C5/05B01J23/002B01J23/6562C07C2523/656B01J2523/00C07C11/08B01J2523/22B01J2523/31B01J2523/3712B01J2523/72
Inventor 王兰磊孔祥明田宇李江蒋锋徐艳飞温达芬常林刘宝军张宏科华卫琦
Owner WANHUA CHEM GRP CO LTD
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