Preparation method of high-temperature inactivation resistant gold-based catalyst for synthesizing chlorethylene

A catalyst, the technology of gold trichloride, which is applied in the field of preparation of high temperature deactivation resistance, can solve the problems of increased deactivation rate and less use of other group substances, so as to improve thermal stability, reduce energy consumption, and operate convenient effect

Active Publication Date: 2014-08-27
内蒙古海驰高科新材有限公司
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  • Abstract
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Problems solved by technology

However, there is still a problem in their research: catalysts with Au as the active center will have different deactivation rates at different temperatures (the deactivation rate is the reduction rate of acetylene conversion in the acetylene hydrochlorination reaction), And with the increase of reaction temperature, the deactivation rate has

Method used

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  • Preparation method of high-temperature inactivation resistant gold-based catalyst for synthesizing chlorethylene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The first step, the washing of activated carbon:

[0072] At room temperature, weigh 5g of activated carbon and add 50g of water, oscillate under ultrasonic conditions to sink all activated carbon particles under water; pour out the supernatant and then add the same amount of water, and then keep the system for no less than 30s After supersonic treatment, the supernatant was poured out and an equal amount of water was added. This step was repeated three times to obtain sample A.

[0073] The second step, configuration of cysteine ​​solution:

[0074] Under the condition of ultrasonic vibration at room temperature, 0.5 g of cysteine ​​was added to 38.5 g of hydrochloric acid with a concentration of 1.2 mol / L to prepare a cysteine ​​solution.

[0075] The third step, surface modification of activated carbon:

[0076] While stirring at room temperature, add the cysteine ​​solution dropwise to sample A, start timing after the dropwise addition, and after stirring for at l...

Embodiment 2

[0084] Except that in the second step, the mass of cysteine ​​added is 0.1 g, the others are the same as in Example 1.

Embodiment 3

[0086] Except that in the second step, the mass of cysteine ​​added is 0.05g, other are the same as embodiment 1.

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Abstract

The invention discloses a preparation method of a high-temperature inactivation resistant load type gold catalyst for synthesizing chlorethylene in acetylene hydrochlorination. The catalyst takes active carbon as a carrier, takes aminothiopropionic acid, cystine, methionine and thiocarbamide as active carbon organic surface modifiers and takes auric chloride as an activity center. During the reaction of synthesizing chlorethylene in acetylene hydrochlorination, the active carbon surface modified load type gold catalyst has a high-temperature inactivation resistant performance better than that of an unmodified active carbon load type gold catalyst.

Description

technical field [0001] The invention proposes a preparation method for enhancing the anti-high temperature deactivation performance of an activated carbon-loaded gold trichloride catalyst using cysteine, cystine, methionine and thiourea as active carbon organic surface modifiers. The catalyst uses gold trichloride as an active component and activated carbon modified by an organic surface modifier as a carrier. The preparation steps of the catalyst include two steps of surface modification of activated carbon and loading of active components. The catalyst exhibits high resistance to high temperature deactivation in the reaction of acetylene hydrochlorination to synthesize vinyl chloride. Background technique [0002] Polyvinyl chloride (PVC), as the third largest plastic product, is widely used all over the world. Its demand is also increasing year by year. As far as China is concerned, the total output of PVC has been increasing at a growth rate of no less than 20% since ...

Claims

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Application Information

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IPC IPC(8): B01J31/26C07C17/08C07C21/06
Inventor 李伟李荣观关庆鑫
Owner 内蒙古海驰高科新材有限公司
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