A kind of method of low temperature plasma modification catalyst carrier

A low-temperature plasma, catalyst carrier technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc. It can achieve the effect of improving the activity or stability of the acetylene hydrochlorination catalyst, being environmentally friendly, and having a simple modification process.

Active Publication Date: 2020-01-24
XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The carrier treatment and modification in the above patents all adopt relatively conventional treatment methods such as impregnation and roasting. The number of functional groups introduced is small, the process is complicated, the environmental pollution is serious, and the effect of improving the performance of the catalyst is not obvious.

Method used

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  • A kind of method of low temperature plasma modification catalyst carrier
  • A kind of method of low temperature plasma modification catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Refer to attached figure 1 , including a power supply, a plasma generator, and a device composed of a reaction gas in sequence. The plasma generator can be provided with a heating device; the carrier activated carbon is placed in the plasma generator, the reaction gas is passed through, and the plasma generator is turned on.

[0018] Recipe: Dissolve 0.82g of mercuric chloride in 20ml of hot water, and add 10g of the following carrier. Carrier 1: Untreated dry coal-based carbon; Carrier 2: Soak in 2M / L hydrochloric acid for 8 hours, wash with deionized water until neutral, and dry at 120°C for 8 hours; Carrier 3: Put dry activated carbon into a plasma reactor, and the reaction gas is Chlorine gas, reaction temperature 45°C, discharge power per unit volume 2.9W / cm 3 , the reaction time is 1min. Nitrogen was used to replace the remaining reaction gas.

Embodiment 2

[0020] The difference from Example 1 is that the formula: 0.1046g of chloroauric acid is dissolved in 20ml of water, and 10g of the following carrier is added. Carrier 1: Untreated dried coconut shell carbon; Carrier 2: Soak in 2M / L nitric acid for 8 hours, wash with deionized water until neutral, and dry at 120°C for 8 hours; Carrier 3: Put dry activated carbon into a plasma reactor, and the reaction gas is Nitrogen, reaction temperature 60°C, discharge power per unit volume 5W / cm 3 , The reaction time is 0.5min. Nitrogen was used to replace the remaining reaction gas.

Embodiment 3

[0022] The difference with Examples 1 and 2 is that the formula: 0.1046g of chloroauric acid is dissolved in 20ml of water, and 10g of the following carriers are added. Carrier 1: Untreated dry wood charcoal; Carrier 2: Soak in 2M / L sulfuric acid for 8 hours, wash with deionized water until neutral, and dry at 120°C for 8 hours; Carrier 3: Put dry activated carbon into a plasma reactor, and the reaction gas is sulfur dioxide , the reaction temperature is 80°C, and the discharge power per unit volume is 6W / cm 3 , The reaction time is 10min. Nitrogen was used to replace the remaining reaction gas.

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Abstract

The invention discloses a method for modifying catalyst carriers by plasmas at the low temperatures. The method is characterized by comprising steps of mixing catalyst carrier activated carbon and modified gas with chlorine, nitrogen, phosphorus, sulfur and the like with each other in plasma discharge environments in a reactor; carrying out low-temperature plasma modification reaction; removing residual gas to obtain the activated carbon carriers with a type or a plurality of types of functional groups with high contents of chlorine, nitrogen, sulfur, phosphorus and the like. The method for modifying the catalyst carriers by the plasmas at the low temperatures has the advantages that the carriers with the functional groups with the chlorine, the nitrogen, the sulfur, the phosphorus and the like can be quickly modified, the method is high in modification speed as compared with conventional methods for modifying activated carbon by means of acid treatment, high-temperature calcination and the like, the modified functional groups are high in content, and obvious effects of enhancing the activity or the stability of acetylene hydrochlorination catalysts can be realized; the method is little in environmental pollution, and the catalyst carriers are convenient to modify.

Description

technical field [0001] The invention relates to the field of catalyst carrier modification for synthesis of vinyl chloride by acetylene hydrochlorination, in particular to a method for modifying the catalyst carrier by low-temperature plasma. Background technique [0002] Vinyl chloride monomer is an important synthetic raw material for polyvinyl chloride, polyvinyl chloride is one of the synthetic resins with the largest consumption and output in my country, and the basic national conditions of our country with more coal and less oil determine that the production of PVC by calcium carbide method still occupies a dominant position in our country . The main problems faced by calcium carbide synthesis of PVC are the environmental pollution caused by the use of mercury catalysts and the massive consumption of mercury resources. In response to the problem of mercury pollution in the calcium carbide PVC industry, the Ministry of Industry and Information Technology and the Ministr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/08C07C21/06B01J21/18B01J37/34
CPCB01J21/18B01J37/349C07C17/08C07C21/06
Inventor 郑伟玲陈万银李春华司江坤李国栋周军熊新阳
Owner XINJIANG CORPS MODERN GREEN CHLOR ALKALI CHEM ENG RES CENT LTD
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