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Preparation method of SOF2 hydrolysis catalyst

A hydrolysis catalyst, deionized water technology, applied in catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of low hydrolysis reaction rate constant and complicated operation, achieve good catalytic effect and simple preparation process , the effect of good response

Inactive Publication Date: 2020-03-24
JIYUAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] SOF 2 is SF 6 It is a typical intermediate product that appears in the fault state of electrical appliances, and its concentration is relatively high. It is considered to be a more effective fault marker. At present, SOF 2 Most of the detection of the use of expensive instruments, complicated operation; some portable instruments can only detect SOF 2 +SO 2 The total concentration of SOF cannot be identified individually 2 , by SOF 2 The hydrolysis reaction, the SOF 2 Hydrolyzed to SO 2 , using conventional SO 2 Portable detection instrument detection SO 2 Concentration, and back calculated SOF by chemical balance formula 2 concentration, this method can effectively achieve SOF 2 quick and easy detection of, however, SOF 2 The rate constant of the hydrolysis reaction is very low. -23 order of magnitude, even at 100°C, the rate constant is 10 -10 order of magnitude, in order to improve the SOF 2 The number rate constant of the hydrolysis reaction must use a catalyst to accelerate the hydrolysis reaction; therefore, it is necessary to provide a method for preparing a SOF2 hydrolysis catalyst with good catalytic effect, simple preparation process and accelerated hydrolysis reaction

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1. Preparation of mesoporous template solution

[0020] Accurately weigh a total of 3.2g±0.01g of triblock copolymer F127, weigh 36g±0.01g of deionized water, add the taken deionized water into a beaker, and add the weighed triblock copolymer F127 , and stirred until a clear solution;

[0021] 2. Preparation of zeolite precursor

[0022] Accurately weigh 0.256g ± 0.001g of aluminum isopropoxide and 10.4g ± 0.01g of tetraethyl orthosilicate, put the two in a beaker, and stir until completely fused with a stirrer;

[0023] 3. Mix the mesoporous template solution and the zeolite precursor, and stir vigorously for 3-5 hours until the two are completely fused;

[0024] 4. Add 4.096g±0.001g of tetrapropylammonium hydroxide solution dropwise, and keep stirring until it solidifies to form a gel while adding, and keep it in the gel state for drying at 90°C to remove excess residual liquid and gel The molecular formula of the substance contained is 0.75Al 2 o 3 : 60SiO 2 :0...

Embodiment 2

[0031] A kind of SOF 2 The preparation method of hydrolysis catalyst is characterized in that: it comprises the following steps:

[0032] Step 1): The Ag triblock copolymer F127 (HO·(C 2 h 4 O) m ·(C 3 h 6 O) n H) as a mesoporous templating agent, add to deionized water with a weight of Bg, and stir until a clear solution;

[0033] Step 2): Aluminum isopropoxide (C 3 h 7 O) 3 Al is the aluminum source, and tetraethyl orthosilicate Si(OC 2 h 5 ) 4 To prepare a zeolite precursor for the silicon source, add Cg aluminum isopropoxide and Dg tetraethyl orthosilicate in sequence to the solution in step 1) and stir vigorously for 3-5 hours;

[0034] Step 3): In the solution obtained in step 2), add the small molecule template agent tetrapropylammonium hydroxide C with a weight of Eg dropwise 12 h 28 NOH solution, continue to stir until it solidifies to form a gel, and dry at 90°C for at least 12 hours until the weight of the solid dry gel does not change substantially; ...

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PUM

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Abstract

The invention relates to a preparation method of an SOF2 hydrolysis catalyst. The preparation method comprises the following steps: firstly, adding a triblock copolymer F127 serving as a mesoporous template agent into deionized water; then sequentially adding aluminum isopropoxide and ethyl orthosilicate and carrying out violent stirring for 3 to 5 hours; dropwise adding a small-molecular templateagent, namely tetrapropylammonium hydroxide into the obtained solution; continuing to stir until a gel is formed through curing; crystallizing the solid dried gel at 160 DEG C by using a steam-assisted method; carrying out water washing and alcohol washing after crystallization treatment; then conducting drying and calcining to obtain an mZSM-5 molecular sieve; impregnating the mZSM-5 molecular sieve in a chloroplatinic acid standard solution to allow the molecular sieve to be loaded with metal Pt; and performing drying, calcining, tabletting, crushing, and sieving successively to obtain thecatalyst Pt / mZSM-5. The catalyst has the advantages of good catalytic effect, simple preparation process and capability of accelerating a hydrolysis reaction.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a method for preparing a SOF2 hydrolysis catalyst. Background technique [0002] SOF 2 is SF 6 It is a typical intermediate product that appears in the fault state of electrical appliances, and its concentration is relatively high. It is considered to be a more effective fault marker. At present, SOF 2 Most of the detection of the use of expensive instruments, complicated operation; some portable instruments can only detect SOF 2 +SO 2 The total concentration of SOF cannot be identified individually 2 , by SOF 2 The hydrolysis reaction, the SOF 2 Hydrolyzed to SO 2 , using conventional SO 2 Portable detection instrument detection SO 2 Concentration, and back calculated SOF by chemical balance formula 2 concentration, this method can effectively achieve SOF 2 quick and easy detection of, however, SOF 2 The rate constant of the hydrolysis reaction is very l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/44B01J35/10C01B39/40C01B17/50
CPCB01J29/44B01J37/0018C01B39/40C01B17/50B01J2229/18B01J35/60B01J35/643
Inventor 赵珩苗堃李峙韩光王金子霍明霞王锋张永乐郭红梅
Owner JIYUAN POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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