Selective hydrogenation catalyst and preparation method thereof

A hydrogenation catalyst and selectivity technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems such as poor selectivity and short life, and achieve extended The effect of long life, strong anti-gelation ability and high stability

Active Publication Date: 2016-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] Aiming at the defects of short service life and poor selectivity of existing catalysts, the present invention provides a selective hydrogenation catalyst, which has excellent hydrogenation performance and good selectivity and stability

Method used

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  • Selective hydrogenation catalyst and preparation method thereof
  • Selective hydrogenation catalyst and preparation method thereof
  • Selective hydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Mix and knead pseudo-boehmite, niobium pentoxide, nitric acid, and water, extrude into strips, dry at 120°C, and roast at 950°C for 3 hours to obtain a catalyst carrier; then prepare palladium nitrate solution, adjust the pH value to 3.0 with ammonia water, Immerse on the catalyst carrier, remove the remaining liquid after 20 minutes, wash with distilled water, age, dry at 120°C for 2 hours, and roast at 400°C for 3 hours to obtain a palladium-containing catalyst precursor; finally prepare a lead acetate solution and impregnate it on the catalyst precursor , dried at 120°C for 4h, and calcined at 500°C for 4h to prepare the desired catalyst C-1.

Embodiment 2

[0059] Mix and knead pseudo-boehmite, niobium oxalate, nitric acid, and water, extrude, dry at 120°C, and roast at 1000°C for 3 hours to obtain a catalyst carrier; then prepare a palladium chloride solution, adjust the pH to 2.8 with sodium carbonate, and impregnate Put it on the catalyst carrier, remove the remaining liquid after 20 minutes, wash with distilled water, age, dry at 120°C for 2 hours, and roast at 450°C for 3 hours to obtain a palladium-containing catalyst precursor; then prepare a lead nitrate solution and impregnate it in front of the palladium-containing catalyst On the body, it was dried at 120°C for 2h and calcined at 450°C for 4h to prepare the desired catalyst C-2.

Embodiment 3

[0061] Pseudoboehmite, niobium oxalate, nitric acid, and water were mixed and kneaded, extruded, dried at 120°C, and calcined at 500°C for 3 hours to obtain a composite carrier of niobium oxide and alumina; then a certain amount of magnesium nitrate solution was impregnated in the catalyst On the carrier, dry at 110°C for 4 hours and roast at 1080°C for 5 hours to make a catalyst carrier containing magnesium; then prepare a palladium acetate solution, adjust the pH to 3.0 with sodium carbonate, impregnate it on the catalyst carrier, remove the remaining liquid after 20 minutes, and wash with distilled water , after aging, drying at 120°C for 3 hours, and roasting at 420°C for 3 hours to obtain a palladium-containing catalyst precursor; then prepare a lead nitrate solution, impregnate it on the palladium-containing catalyst precursor, dry at 120°C for 3 hours, and roast at 500°C for 4 hours to obtain Desired Catalyst C-3.

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Abstract

The invention discloses a selective hydrogenation catalyst and a preparation method thereof. The catalyst is composed of a composite alumina / niobium oxide and active components. The catalyst includes 0.1-1.0 wt% of palladium, 2-10 wt% of lead, and 0.5-3.0 wt% of niobium oxide. The catalyst has high hydrogenation activity and selectivity, has good stability, and is suitable for selective hydrogenation alkyne removal for C4 material being high in alkyne content from extraction of butadiene.

Description

technical field [0001] The invention relates to a selective hydrogenation catalyst and a preparation method thereof, in particular to a high-activity, high-selectivity noble metal catalyst and a preparation method thereof. The catalyst of the invention is particularly suitable for the selective hydrogenation and removal of alkynes of C4 materials with high alkyne content after butadiene extraction. Background technique [0002] The cracked C4 fraction usually contains 40wt%-60wt% butadiene and about 0.5-2.0% alkyne impurities, mainly including methylacetylene (MA), ethyl Acetylene (EA), vinyl acetylene (VA) and butyne, etc. Butadiene is an important monomer in the synthetic rubber industry. Solvent extraction methods are usually used to extract butadiene from cracked C4 fractions, such as acetonitrile method (ACN), N-methylpyrrolidone method (NMP) and dimethylformamide method (DMF). At present, these methods basically meet the requirements for Butadiene purity requirement...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648B01J23/89B01J23/652C07C7/167C07C11/08
Inventor 郑云弟钱颖王宗宝马好文张忠东王斌李晓军胡晓丽王战军孙利民梁顺琴潘曦竹梅菊美杨大伟王涛郭珺范国宁董海军
Owner PETROCHINA CO LTD
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