Gold-containing catalyst for preparing vinyl chloride by using acetylene method as well as preparation method and application of catalyst

A technology of catalyst and vinyl chloride, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of fast sublimation loss, environmental pollution, short production life, etc., to overcome high toxicity and high pollution, and prepare Simple method, high selectivity effect

Inactive Publication Date: 2012-01-25
TIANJIN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

due to HgCl 2 The vapor pressure is high, and the catalyst is easily sublimated during the reaction, resulting in deactivation, and the lost mercuric chloride will cause toxicity to organisms and the environment
The main shortcomings of the mercuric chloride catalyzed acetylene method to produce vinyl chloride: 1. After replacing the new catalyst in production, it must be maintained for 7 to 20 days, which affects production; 2. Since mercury ions are physically adsorbed on the inner wall of the activated carbon channel, heat The stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] After calculation: when gold accounts for 1% of the mass of the gold-containing catalyst for the preparation of vinyl chloride by the acetylene method;

[0044] 0.2124g HAuCl 4 4H 2 O was dissolved in 12ml aqua regia, and CoCl was added according to the Co / Au molar ratio of 1:1 2 ·6H 2 O, La / Au molar ratio is 2:1, add LaCl 3 , Cu / Au molar ratio is 2:1, add CuCl 2 , and stir evenly, until all the solids are dissolved to obtain the impregnated mother liquor; pour 10g of activated carbon carrier into the prepared impregnated mother liquor, impregnate at 25°C for 16 hours, age at 140°C for 8 hours, take it out and cool it for later use, and obtain the catalyst precursor body; activated in hydrogen chloride at 120°C for 3 hours to obtain AuCl 3 Catalyst loading at 1%.

[0045] In the acetylene hydrochlorination reaction, the catalyst adopts a fixed-bed reactor, and the catalyst consumption is 3g, and the reaction gas distribution is C 2 h 2 The molar ratio of / HCl is...

Embodiment 2

[0047] After calculation: when gold accounts for 1% of the mass of the gold-containing catalyst for the preparation of vinyl chloride by the acetylene method;

[0048] 0.2124g HAuCl 4 4H 2 O was dissolved in 12ml of aqua regia, and CoCl was added according to the Co / Au molar ratio of 2:1 2 ·6H 2 O, La / Au molar ratio is 1:1, add LaCl 3 , K / Au molar ratio is 1:1, add KCl, and stir evenly, until all the solids are dissolved to obtain the impregnating mother liquor; pour 10g of MCM-41 molecular sieve carrier into the prepared impregnating mother liquor, after immersing at 60°C for 14 hours , aged at 80°C for 24 hours, took it out and cooled it for later use, and obtained the catalyst precursor; activated hydrogen chloride at 160°C for 0.5 hour to obtain AuCl 3 Catalyst loading at 1%.

[0049] In the acetylene hydrochlorination reaction, the catalyst adopts a fixed-bed reactor, and the catalyst consumption is 3g, and the reaction gas distribution is C 2 h 2 The molar ratio o...

Embodiment 3

[0051] After calculation: when gold accounts for 2% of the mass of the gold-containing catalyst for the preparation of vinyl chloride by the acetylene method;

[0052] 0.4247g HAuCl 4 4H 2 O was dissolved in 14ml of aqua regia, and CoCl was added according to the Co / Au molar ratio of 10:1 3 (prepared according to the literature method), La / Au molar ratio is 2:1, adding La(NO 3 ) 3 , Na / Au molar ratio is 2: 1, add NaCl, and stir evenly, until the solids are all dissolved to obtain the impregnation mother liquor; pour the prepared impregnation mother liquor into a container containing 10g SiO 2 In the container of the carrier, after immersing at 70°C for 12 hours, aging at 90°C for 16 hours, taking out and cooling for later use, the catalyst precursor was obtained; activating hydrogen chloride at 140°C for 1 hour to obtain AuCl 3 Catalyst loading at 2%.

[0053] In the acetylene hydrochlorination reaction, the catalyst adopts a fixed-bed reactor, and the catalyst consumptio...

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PUM

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Abstract

The invention discloses a gold-containing catalyst for preparing vinyl chloride by using an acetylene method as well as a preparation method and application of the catalyst. The catalyst contains a gold element, a lanthanum element, a cobalt element, a co-catalytic metal element and a carrier with a porous micro-structure. The gold accounts for 0.3%-2% by mass of the catalyst; the gold element in the catalyst comes from gold chlorides or gold nitrates; the cobalt element comes from chlorides of the cobalt or cobalt nitrates; and the lanthanum element comes from lanthanum chlorides or lanthanum nitrates. The catalyst disclosed by the invention in use is free from inactivation phenomenon caused by sublimation of industrial catalyst mercury chloride, has no pollution to the environment, overcomes defects of high toxicity and high pollution of the conventional industrial catalyst mercury chloride, has the characteristics of simple preparation method, high conversion rate of the acetylene and selectivity of the vinyl chloride, long service life up to 1000 hours or more, high temperature resistance, and high intensity and is renewable, and the conversion rate of the acetylene and selectivity of the vinyl chloride approximate to or exceed the technical indexes of the mercury chloride catalyst.

Description

technical field [0001] The invention relates to a gold-containing catalyst for preparing vinyl chloride by an acetylene method, a preparation method and application. Background technique [0002] Polyvinyl chloride material is widely used in various industries due to its excellent performance in physical properties and chemical stability, and is one of the most widely used general-purpose plastics in the world. Polyvinyl chloride (PVC) is polymerized from vinyl chloride (VCM). The industrial production methods of vinyl chloride monomer mainly include ethylene oxychlorination method and acetylene carbide method. In developed countries such as the United Kingdom and the United States, due to the advantages of the petroleum industry, vinyl chloride is mainly produced by the ethylene oxychlorination method, while the output of vinyl chloride by the calcium carbide method is only more than ten percent of the world's total output. However, in recent years, with the gradual reduc...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J29/74B01J27/224C07C21/06C07C17/08
Inventor 张金利代斌王绪根刘楠李韡
Owner TIANJIN UNIV
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