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Carbonyl sulfide hydrolysis and preparation method thereof

A hydrolysis catalyst, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of high desulfurization accuracy

Inactive Publication Date: 2010-04-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] According to literature reports, the COS hydrolysis reaction is a base-catalyzed reaction, and the composite oxide after high-temperature calcination of hydrotalcite-like has a high specific surface area, dispersion and strong alkalinity, but the derivative composite oxide of hydrotalcite-like is applied to COS Hydrolysis studies have not been reported

Method used

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  • Carbonyl sulfide hydrolysis and preparation method thereof
  • Carbonyl sulfide hydrolysis and preparation method thereof
  • Carbonyl sulfide hydrolysis and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Weigh 8.1788g Ni(NO 3 ) 2 ·6H 2 O, 7.2115g Mg(NO 3 ) 2 ·6H 2 O and 7.575gFe(NO 3 ) 3 9H 2 O was dissolved in distilled water to make solution A, so that the total metal mole was 0.075mol; with NaOH, Na 2 CO 3 As a precipitating agent, take 5.2995g Na 2 CO 3 (0.05mol) and 6.75g NaOH were dissolved in distilled water to form solution B;

[0027] (2) Transfer the prepared A solution to the separatory funnel, drop the A solution into the B solution at a rate of 3.6mL / min under room temperature and mechanical stirring, control the pH of the solution at the end of the dropping to 9, drop After the addition, the stirring was continued for 30 minutes, and finally a suspension was obtained;

[0028] (3) crystallize the suspension obtained in step (2) in a water bath at 50° C. for 12 hours;

[0029] (4) suction filter the product obtained by crystallization, and wash it with distilled water to make it neutral; put the obtained product in an oven and dry at a temp...

Embodiment 2

[0032] (1) Weigh 4.3654g Co(NO 3 ) 2 ·6H 2 O, 8.724g Ni(NO 3 ) 2 ·6H 2 O and 11.2539gAl(NO 3 ) 3 9H 2 O was dissolved in distilled water to make solution A, so that the total metal mole was 0.075mol; with NaOH, Na 2 CO 3 As a precipitating agent, take 5.2995g Na 2 CO 3 (0.05mol) and 7.2g NaOH were dissolved in distilled water to form solution B;

[0033] (2) Transfer the prepared A solution to the separatory funnel, drop the A solution into the B solution at a rate of 3.6mL / min under room temperature and mechanical stirring, control the pH of the solution at the end of the dropping to 10, drop After the addition, the stirring was continued for 30 minutes, and finally a suspension was obtained;

[0034] (3) crystallize the suspension obtained in step (2) in a water bath at 60° C. for 12 hours;

[0035] (4) suction filter the product obtained by crystallization, and wash it with distilled water to make it neutral; put the obtained product in an oven and dry at a tem...

Embodiment 3

[0038] (1) Weigh 2.718g Cu(NO 3 ) 2 ·3H 2 O, 7.2115g Mg(NO 3 ) 2 ·6H 2 O and 7.575gAl(NO 3 ) 3 9H 2 O was dissolved in distilled water to make solution A, so that the total metal mole was 0.075mol; with NaOH, Na 2 CO 3 As a precipitating agent, take 5.2995g Na 2 CO 3 (0.05mol) and 6.75g NaOH were dissolved in distilled water to form solution B;

[0039] (2) Transfer the prepared A solution to the separatory funnel, drop the A solution into the B solution at a rate of 3.6mL / min under room temperature and mechanical stirring, control the pH of the solution at the end point of the addition to be 8, drop After the addition, the stirring was continued for 30 minutes, and finally a suspension was obtained;

[0040] (3) crystallize the suspension obtained in step (2) in a water bath at 40° C. for 12 hours;

[0041] (4) suction filter the product obtained by crystallization, and wash it with distilled water to make it neutral; put the obtained product in an oven and dry a...

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Abstract

The invention relates to a carbonyl sulfide (COS) hydrolysis and a preparation method thereof; the hydrolysis is prepared by taking hydrotalcite like compound as a precursor and is used for low-temperature carbonyl sulfide hydrolysis; the invention is characterized in that: divalent metal saline solution and trivalent metal saline solution are mixed according to mole ratio, the mixed solution of sodium hydroxide and sodium carbonate is added by adopting a coprecipitation method, the crystallization temperature is 40-80 DEG C, the solution flow rate is controlled to be 3.6mL / min under being stirred, the sediment pH is controlled, and then filtration, washing, drying and baking are carried out to obtain derive composite oxide catalyst of the hydrotalcite like compound. The catalyst prepared by taking the hydrotalcite like compound as the precursor in the invention has obvious catalytic activity and high selectivity.

Description

technical field [0001] The invention relates to a carbonyl sulfide (COS) hydrolysis catalyst and a preparation method thereof, in particular to a low-temperature carbonyl sulfide hydrolysis catalyst and a preparation method thereof, which are mainly used for removing carbonyl sulfide in raw material gas. Background technique [0002] COS is the main form of organic sulfur in industrial gases. Trace amounts of COS in industrial production can easily cause catalyst poisoning and deactivation, and have a corrosive effect on industrial production equipment. In addition, COS emitted to the atmosphere without treatment can form SO 2 , promote photochemical reactions, and eventually transform into sulfate aerosols, causing serious environmental problems. Due to chemical activity ratio H 2 S is much smaller, its acidity and polarity are weaker than H 2 S, generally used to remove H 2 The method of S cannot completely remove COS effectively, so the removal of COS is the key to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J23/75B01J23/72B01J23/745B01J37/03B01D53/86B01D53/48B01D53/52
Inventor 易红宏王红妍唐晓龙于丽丽杨丽娜
Owner KUNMING UNIV OF SCI & TECH
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