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Hydrogenation dechlorinating catalyst for synthesizing trifluoroethylene and novel preprocessing process of carrier of catalyst

A technology of trifluoroethylene and hydrodechlorination, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., which can solve the constraints of mass production and activity of trifluoroethylene Problems such as easy loss of components, poor catalyst stability, etc., to achieve the effect of reaction stability and catalyst efficiency improvement, excellent catalytic activity, and catalytic performance improvement

Active Publication Date: 2014-01-29
SINOCHEM LANTIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The hydrodechlorination catalysts for the preparation of trifluoroethylene in the above-mentioned patents all have poor activity, especially the active components are easy to lose, agglomerate, sinter, etc., resulting in poor catalyst stability and easy deactivation, which greatly restricts the production of trifluoroethylene. mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0035] Embodiment 2Pd-Cu-Bi / C catalyst is prepared, coconut shell charcoal carrier adopts HNO 3 -KF for pretreatment (sample 2)

[0036] Configuration 15.0% HNO 3 , 100ml of 10.0% KF mixed solution, add 50g of activated carbon to be treated, stir and heat up to 90°C, reflux at constant temperature for 2.0h, cool down to room temperature, wash with distilled water until neutral, and vacuum dry at 80°C for 5.0h for later use.

[0037] Weigh 0.5gBiCl 3 , 1.8g CuCl 2 2H 2 O, add 10.0g deionized water to form a mixed solution, add 10.0g of the above-mentioned HNO to the solution 3 - Coconut shell charcoal carrier treated with KF, impregnated for 24h, vacuum dried at 90°C for 4.0h, and cooled to room temperature. Then weigh 4.5g of chloropalladium acid aqueous solution, add 8.6g of deionized water to form a solution, add Bi and Cu-impregnated carbon supports to the solution, impregnate for 24h, vacuum-dry at 90°C for 4.0h, and cool down to room temperature for later use.

Embodiment 3

[0038]Embodiment 3Pd-Fe-K-Bi / C catalyst preparation, coconut shell charcoal carrier adopts HCl-HF to carry out pretreatment (sample 3)

[0039] Prepare 200ml of 10.0% HCl, 12.0% HF mixed solution, add 100g of activated carbon to be treated, stir and heat up to 100°C, reflux at constant temperature for 2.0h, cool down to room temperature, wash with distilled water until neutral, and vacuum dry at 90°C for 5.0h for later use.

[0040] Weigh 0.2gKCl, 0.3gBiCl 3 , 2.0gFeCl 3 , 10.5g chloropalladium acid aqueous solution, add 5.5g deionized water to make a mixed solution, add 10.0g coconut shell charcoal carrier that has been treated with HCl-HF to the solution, impregnate for 24h, vacuum dry at 90°C for 4.0h, reduce to Set aside at room temperature.

Embodiment 4

[0041] Embodiment 4Pd-Cu-K / C catalyst is prepared, coconut shell charcoal carrier adopts HCl-KF to carry out pretreatment (sample 4)

[0042] Prepare 100ml of 12.0% HCl, 13.0% KF mixed solution, add 50g of activated carbon to be treated, stir and heat up to 110°C, reflux at constant temperature for 1.0h, cool down to room temperature, wash with distilled water until neutral, and vacuum dry at 90°C for 5.0h for later use.

[0043] Weigh 0.4g KCl, add 10.0g deionized water to make KCl solution, add 10.0g coconut shell charcoal carrier treated with HCl-KF to the solution, impregnate for 24h, vacuum dry at 90°C for 4.0h, and cool down to room temperature. Then weigh 1.0g CuCl 2 2H 2 O, 16.5g aqueous solution of chloropalladium acid, add 3.0g deionized water to form a solution, add K-impregnated carbon support to the solution, impregnate for 24h, vacuum dry at 90°C for 4.0h, and cool down to room temperature for later use.

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Abstract

The invention discloses a catalyst used for preparing trifluoroethylene by hydrogenating and dechlorinating trifluorochlor oethylene, comprising a first catalyst, a second catalyst and an assistant, wherein the first catalyst is one or combination of more than two of palladium, ruthenium and platinum, the second catalyst is Fe and / or Cu, and the assistant is selected from one or combination of more than two of V, Bi and K. The invention also discloses an activated carbon carrier preprocessing method of the catalyst for preparing the trifluoroethylene by hydrogenating and dechlorinating the trifluorochlor oethylene and an application of the prepared catalyst in trifluoroethylene preparation. The catalyst prepared by the method disclosed by the invention has the advantages of high catalytic activity and catalyst efficiency, good trifluoroethylene selectivity, strong reaction stability, mild reaction condition, simple catalyst preparation and processing process and the like.

Description

technical field [0001] The invention relates to a hydrodechlorination catalyst for synthesizing trifluoroethylene and a carrier pretreatment process thereof. Background technique [0002] Trifluoroethylene is an important fluorine-containing synthetic monomer, which can be polycondensed with ethanol to produce environmentally friendly cleaning agent hydrofluoroether; added with bromine, and then dehydrobrominated to obtain bromotrifluoroethylene, which is used for synthesis Electronic etching gas hexafluorobutadiene and high-grade pure cotton fabric finishing agent; especially the P(VDF-TRFE) copolymer obtained by copolymerization with vinylidene fluoride has extremely wide application prospects and Market potential for accelerometers, vibration / motion film sensors, audio / acoustics, ultrasonics, switches, piezoelectric cables, and traffic sensors. [0003] There are two main synthesis methods of trifluoroethylene, one is to co-produce chlorotrifluoroethylene and trifluoroet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J21/18B01J37/00C07C21/18C07C17/23
Inventor 刘武灿徐卫国
Owner SINOCHEM LANTIAN
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