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Catalyst for preparing chloroethylene by acetylene hydrochlorination

A technology for producing vinyl chloride and catalysts by chlorination, which is applied in the direction of physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, hydrogen halide addition preparation, etc. Issues such as the second element, to achieve the effect of stabilizing the active center

Inactive Publication Date: 2013-06-26
冯良荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are studies on complex catalysis and activated carbon modification, no good results have been obtained.
So far, no literature reports have been found that specifically study this second element.

Method used

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  • Catalyst for preparing chloroethylene by acetylene hydrochlorination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Carbon carrier: activated carbon, bulk density 0.50g / ml, BET specific surface area 387m 2 / g, particle size 3.5~4.0mm, particle length 3~10mm. Measure 40ml of the activated carbon, soak it with 50ml of concentrated sulfuric acid and concentrated nitric acid at a volume ratio of 1:1 for 24h, wash, dry, soak with 30ml of 0.005g bismuth subcarbonate hydrochloric acid solution, dry, add 40ml of 30% hydrazine hydrate solution for soaking for 24h, wash and dry .

[0049] Active component: weigh CuCl 2 2.70 g of 2H2O (chemically pure, molecular weight 170.48, content 99%) was dissolved in about 30 ml of distilled water. Take by weighing 2.29g 8-hydroxyquinoline (molecular weight 145.16 analytically pure, content 99.5%), add in the above-mentioned solution of solution, then add 20ml concentrated hydrochloric acid to dissolve, the color changes from green to deep blue purple, adjust the total volume to about 50ml, obtain the solution a.

[0050] Catalyst: Pour the dried acti...

Embodiment 2

[0053] Carbon carrier: activated carbon, bulk density 0.38g / ml, BET specific surface area 1091m 2 / g, particle size 2.5mm, particle length 2-5mm. Measure 40ml of the activated carbon, impregnate it with a solution obtained by dissolving 5g of acrylonitrile and 0.01g of dibenzoyl peroxide in 50ml of ethanol, remove the ethanol in a vacuum at room temperature, leave it for 24 hours, and then dry it in an air atmosphere at 230°C for 1 hour.

[0054] Catalyst: prepare 50 ml of 0.016 mol nickel chloride aqueous solution, impregnate the above-mentioned activated carbon, dry, then impregnate 50 ml of 0.016 mol o-phenanthroline ethanol solution, and dry again. Then, evaluation was performed using the aforementioned evaluation device.

[0055] Phenomenon: relatively high activity, no ligand or loss of organic base, slightly lower selectivity.

Embodiment 3

[0057] Carbon carrier: activated carbon, bulk density 0.38g / ml, BET specific surface area 1091m 2 / g, particle size 2.5mm, particle length 2-5mm. Measure 40ml of the activated carbon, impregnate it with aniline hydrochloric acid solution, then impregnate ammonium persulfate hydrochloric acid aqueous solution, stand still in a nitrogen atmosphere at room temperature for 5 hours, and dry under reduced pressure at 50°C.

[0058] Catalyst: Prepare 50ml of 0.016mol copper chloride aqueous solution, impregnate the above activated carbon, dry, then add 12g of phthalic anhydride, 12g of urea, seal the autoclave, heat at 280°C for 24h, take it out and wash it with distilled water for 5 times, then wash with ethanol 5 times, dry. Then, evaluation was performed using the aforementioned evaluation device.

[0059] Phenomenon: relatively high activity, no loss of ligand or organic base.

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Abstract

The invention provides a mercury-free and precious metal-free catalyst used for preparing chloroethylene by acetylene gas phase hydrochlorination, which is characterized in that organic base uncoordinated with a metallic element and a metallic element complex are loaded on active carbon or a graphite carrier; a ligand of the metallic element complex is two-teeth, three-teeth, four-teeth, five-teeth or six-teeth ligand, and wherein at least one ligating atom is nitrogen atom, and the nitrogen atom contains one double bond, the organic base which is not coordinated with the metallic element is primary amine, secondary amine, tertiary amine or nitrogen atom which forms a conjugated pi bond.

Description

technical field [0001] The invention provides a mercury-free and noble metal-free acetylene hydrochlorination catalyst, which is used for the reaction of acetylene and hydrogen chloride gas to synthesize vinyl chloride. Background technique [0002] Polyvinyl chloride (PVC) is one of the five major thermoplastic synthetic resins, and its output and consumption rank first among the five major synthetic resins in China. According to statistics, in 2010, the national demand for PVC reached 12 million tons, and the output reached 11.28 million tons. Almost all (more than 98%) of vinyl chloride monomer is used to produce polyvinyl chloride resin, and the rest is used to produce polyvinyl chloride chloride and chlorinated solvents. The technical level of producing vinyl chloride monomer directly affects the quality, production cost and market competitiveness of polyvinyl chloride resin. [0003] At present, there are two main preparation processes for the production of industria...

Claims

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Application Information

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IPC IPC(8): B01J31/20C07C21/06C07C17/08
Inventor 冯良荣张淑清甘亚
Owner 冯良荣
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