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Acetylene hydrochloride gold-based catalyst and preparation method thereof

An acetylene hydrochloride gold-based, catalyst technology, applied in physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, hydrogen halide addition preparation, etc., can solve the problem of high cost of double precious metals and unfavorable industrialization Production, unsatisfactory stability of gold-based catalysts, etc., to reduce the preparation cost and improve the catalytic activity.

Pending Publication Date: 2022-03-08
内蒙古鄂尔多斯电力冶金集团股份有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For example, the Chinese patent CN110614093A uses gold-ruthenium bimetal as the active component, and prepares the catalyst by ultrasonic impregnation. The dual active sites greatly improve the conversion rate and selectivity, but the high cost caused by the dual noble metal is not conducive to industrial production; Chinese patent CN112237945A prepared gold nanoclusters through halogen or alcohol ligands, the particle size is about 2nm, and can maintain stability well
Chinese patent CN104707602A uses PVP to protect Au ions, which also improves the overall stability of the catalyst, but the stability of the obtained gold-based catalyst is still not ideal

Method used

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  • Acetylene hydrochloride gold-based catalyst and preparation method thereof

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Effect test

Embodiment 1

[0040] Embodiment 1 A kind of preparation method of acetylene hydrochloride gold-based catalyst

[0041] Take the following steps:

[0042] Weigh 50g of wood-based activated carbon, immerse the activated carbon in 200mL of 5%wt hydrochloric acid solution for 5h, filter, wash with deionized water until the pH of the aqueous solution is close to 5, and dry at 120°C for 8h to obtain a precursor; mix 50g of the precursor with 500mL of 15 % dichlorophenylphosphorus aqueous solution was mixed and stirred for 5 hours, and dried at 120°C for 12 hours to obtain modified activated carbon; after that, 40 g of modified activated carbon was taken, and the mixed solution A was added dropwise to the modified activated carbon, and then transferred to Dry in an oven at 120°C for 12 hours to obtain the Au-SCN / AC(P1) catalyst;

[0043] The preparation method of the mixed solution A is as follows: 0.08g of chloroauric acid and 2g of potassium thiocyanate were weighed and dissolved in 30mL of dei...

Embodiment 2

[0045] Embodiment 2 A kind of preparation method of acetylene hydrochloride gold-based catalyst

[0046] Take the following steps:

[0047] Weigh 50g of wood-based activated carbon, immerse the activated carbon in 200mL 5%wt hydrochloric acid solution for 5h, filter, wash with deionized water until the pH of the aqueous solution is close to 5, and dry at 120°C for 8h to obtain a precursor; mix 50g of the precursor with 15% Mix and stir 500mL of di-tert-butylphosphorus chloride aqueous solution for 5 hours, dry at 120°C for 12 hours to obtain modified activated carbon; finally obtain 40g of modified activated carbon, add the mixed solution A to the modified activated carbon drop by drop, and impregnate for 4 hours Afterwards, it was transferred to an oven and dried at 120°C for 12 hours to obtain the Au-SCN / AC(P2) catalyst.

[0048] The preparation method of the mixed solution A is as follows: 0.08g of chloroauric acid and 2g of potassium thiocyanate were weighed and dissolved...

Embodiment 3

[0050] Embodiment 3 A kind of preparation method of acetylene hydrochloride gold-based catalyst

[0051] Take the following steps:

[0052] Weigh 50g of wood-based activated carbon, immerse the activated carbon in 200mL of 5%wt hydrochloric acid solution for 5h, filter, wash with deionized water until the pH of the aqueous solution is close to 5, and dry at 120°C for 8h to obtain a precursor; mix 50g of the precursor with 500mL of 15 % tetrakis hydroxymethyl phosphorus sulfate aqueous solution was mixed and stirred for 5 hours, and dried at 120°C for 12 hours to obtain modified activated carbon; finally, 40 g of modified activated carbon was obtained, and the mixed solution A was added dropwise to the modified activated carbon, and after immersion for 4 hours Transfer to an oven and dry at 120°C for 12 hours to obtain the Au-SCN / AC(P3) catalyst.

[0053]The preparation method of the mixed solution A is as follows: 0.08g of chloroauric acid and 2g of potassium thiocyanate were...

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Abstract

The invention provides an acetylene hydrochloride gold-based catalyst and a preparation method thereof, and belongs to the technical field of organic synthesis. Activated carbon is pretreated by adopting a P-containing aqueous solution, and the catalyst is prepared by adopting an impregnation method; according to the catalyst, metal salt of gold is used as an active component, and a sulfur-containing ligand is used as a co-catalysis component. The addition of the P element and the sulfur ligand in the obtained catalyst significantly inhibits the reduction of high-valence gold species, reduces the loss of the gold species, and improves the stability and catalytic activity of the catalyst; the catalyst is simple to prepare, free of pollution and high in catalytic activity, and is an effective mercury-free catalyst.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to an acetylene hydrochloride gold-based catalyst and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is one of the three major plastics in the world. It has many advantages such as low cost, strong durability, and good physical and chemical properties. It has been accepted and recognized by more and more people. Acetylene hydrochlorination is suitable for production The traditional Chinese medicine reaction of vinyl chloride monomer, however, the catalyst commonly used in this reaction is mercury chloride, which has high volatility, toxicity and persistence, so it is urgent to develop a mercury-free catalyst. Although gold catalysts have excellent acetylene conversion and certain stability, problems such as gold sintering have limited the industrialization process, and the stability of gold-based catalysts is usually improv...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J31/16B01J27/14C07C17/08C07C21/06
CPCB01J31/226B01J31/16B01J27/14C07C17/08B01J2231/32B01J2531/18C07C21/06
Inventor 杨京林代元元解荣永牛强
Owner 内蒙古鄂尔多斯电力冶金集团股份有限公司
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