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Preparation method of catalyst used for preparing vinyl chloride by acetylene hydrochlorination

A technology for chlorinating vinyl chloride and catalysts, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., which can solve environmental pollution and other problems, and achieve the effect of avoiding uneven heating

Inactive Publication Date: 2013-12-04
冯良荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TENHC1 largely inhibits the sublimation loss of HgC1 and prolongs the life of the catalyst, but HgC1 seriously pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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 400ml of this activated carbon.

[0030] Active component: weigh CuCl 2 2H 2 O (analytically pure, molecular weight 170.48, content 99%) 27.0 g was dissolved in about 300 ml of distilled water to obtain solution A.

[0031] Catalyst: Pour the dried activated carbon into the solution A and soak for 1 hour at room temperature. Two graphite electrodes are arranged at a distance of 1m in the vertical direction in the drying tower. One end of the graphite electrode is inserted into the impregnated activated carbon, and a voltage is applied to the other end of the two graphite electrodes. The impregnated activated carbon is heated to 100°C and dried for 10 minutes. It is the black color of activated carbon itself. Then, evaluation was performed using the aforementioned evaluation device.

[0032] Activity evaluation results: th...

Embodiment 2

[0039] 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 this activated carbon.

[0040] Active ingredient: Weigh 0.209gHAuCl 3 4H 2 O (analytical pure, molecular weight 411.85, content 99%) was dissolved in about 30 ml of distilled water to obtain solution B.

[0041] Catalyst: Pour the dried activated carbon into solution B, impregnate it at room temperature for 1 hour, and place it in a drying tower. Copper tubes are set outside the drying tower, and alternating current is passed through the copper tubes, thereby generating an induced current in the activated carbon particle pile of the catalyst, and at the same time feeding nitrogen gas from the lower part of the drying tower to bring the generated water vapor out from the upper part of the drying tower. The impregnated activated carbon is heated and dried until the temperature of the activated carbon reaches 250°C ...

Embodiment 3

[0049] Take 400ml of the same carrier activated carbon as Comparative Example 3, with a particle size of 3.2-4.2mm and a length of 3.5-6.5mm≥85%, soak it in 400ml of an aqueous solution containing 10% mercury chloride at room temperature for 1h, and drip dry. Put it into a glass tube drying tower with a diameter of 50mm, set three electrodes on the inner wall of the glass tube drying tower, the electrodes run through the glass tube drying tower up and down, apply three-phase alternating current to the three electrodes, and inject nitrogen into the glass tube to control the temperature rise Keep it at 90°C for 10 minutes, stop the electric heating, and the surface of the catalyst is black like activated carbon itself. The water content of the dried catalyst is measured by the Karl Fischer method, and the water content is lower than the standard requirement of 0.3%. Mercury chloride content analysis, containing 11.0% mercury chloride. Take 40ml of the catalyst, and carry out th...

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Abstract

The invention provides a preparation method of a catalyst used for preparing vinyl chloride by acetylene gas-phase hydrochlorination. Active carbon is used as a carrier. The preparation method comprises following steps: active carbon is used as a carrier, a reactive metal is fixed on active carbon by immersing; and after that, the active carbon carrier is placed in a drying tower, and is provided with electricity so that heat is generated and the drying process of the catalyst preparation is completed. The activity of the catalyst prepared by the preparation method is higher than that of the catalyst prepared by traditional drying method.

Description

technical field [0001] The invention provides a method for preparing a catalyst for producing vinyl chloride by hydrochlorination of acetylene, which is used for the reaction of acetylene and hydrogen chloride gas to synthesize vinyl chloride. Background technique [0002] Polyvinyl chloride (abbreviated as PVC) is one of the five major thermoplastic synthetic resins, and has become the second largest general-purpose resin after polyethylene resin in the world, accounting for 29% of the world's total consumption of synthetic resins. Its products have good physical and chemical properties, and are widely used in industry, construction, agriculture, daily life, packaging, electric power and other fields. According to incomplete statistics, the national demand for PVC reached 12 million tons in 2010, and the output reached 11.28 million tons. Almost (more than 98%) of vinyl chloride monomer is used to produce polyvinyl chloride resin, and the rest is used to produce polyvinyl ...

Claims

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Application Information

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IPC IPC(8): B01J27/122B01J27/08B01J37/34C07C21/06C07C17/08
Inventor 冯良荣张淑青甘亚
Owner 冯良荣
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