Regeneration method of inactivated COS hydrolytic agent

A technology of hydrolysis agent and regeneration device, which is applied in catalyst regeneration/reactivation, chemical instruments and methods, physical/chemical process catalysts, etc., and can solve problems such as waste of resources, loss of active components, and complex processes

Active Publication Date: 2020-10-02
中琉科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects that active components will be lost by solution washing in the regeneration process of the existing COS hydrolyzer, and then need to add an active agent, resulting in waste of resources and complex process, and then provide a deactivated COS hydrolyzer. regeneration method

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0033] The K 2 CO 3 / Ti-Al 2 o 3 In the hydrolyzing agent, the active component is potassium carbonate, and the carrier is a mixed carrier of titanium oxide and aluminum oxide, and the K 2 CO 3 / Ti-Al 2 o 3 The preparation method of hydrolyzing agent comprises the steps:

[0034] 1) Carrier preparation: mix titanium oxide powder and aluminum oxide powder by mass, ball mill for 10 hours, and then bake at 1100°C for 2 hours to prepare the carrier and set aside;

[0035] 2) preparation mass fraction is 10% K 2 CO 3 aqueous solution, place the carrier in K 2 CO 3 Soaked in aqueous solution for 3 hours, then dried at 90 °C for 0.8 hours to obtain the K 2 CO 3 / Ti-Al 2 o 3 hydrolyzing agent, the K 2 CO 3 / Ti-Al 2 o 3 K in hydrolyzing agent 2 CO 3 The mass ratio to the carrier is 6:58; the K 2 CO 3 / Ti-Al 2 o 3 The particle size of the hydrolyzing agent is 2-3mm.

[0036] The Na 2 CO 3 / Ti-SiO 2 -Al 2 o 3 In the hydrolyzing agent, the active component is N...

Embodiment 1

[0043] The present embodiment provides a kind of regeneration method of deactivated COS hydrolysis agent, comprises the following steps:

[0044] 1) Add 1 mL of inactivated carbonyl sulfide COS hydrolyzer K 2 CO 3 / Ti-Al 2 o 3 (wherein the active ingredient is K 2 CO 3 , the carrier is titanium oxide and aluminum oxide) into the U-shaped quartz tube, then the U-shaped quartz tube is placed in the heating furnace; nitrogen is passed into the quartz tube at a rate of 20mL / min (the volumetric space velocity of nitrogen is 1200h -1 ) was purged for 10 minutes, and then the inactivated COS hydrolysis agent was heated to 180° C. and kept at 180° C. for 60 minutes while maintaining the above nitrogen flow;

[0045] 2) In the state of maintaining nitrogen gas flow, carbon monoxide gas is passed into the quartz tube at a rate of 20mL / min (the volumetric space velocity of carbon monoxide gas is 1200h -1 ), then slowly raise the temperature of the heating furnace, heat the deactiva...

Embodiment 2

[0049] The present embodiment provides a kind of regeneration method of deactivated COS hydrolysis agent, comprises the following steps:

[0050] 1) Add 1 mL of inactivated carbonyl sulfide COS hydrolyzer Na 2 CO 3 / Ti-SiO 2 -Al 2 o 3 (wherein the active component is Na 2 CO 3 , the carrier is titanium oxide, silicon oxide and aluminum oxide) into the U-shaped quartz tube, and then the U-shaped quartz tube is placed in the heating furnace; in the quartz tube, nitrogen gas (the volumetric space of the nitrogen gas) is passed into the quartz tube at a rate of 20mL / min Speed ​​is 1200h -1 ) was purged for 10 minutes, and then the inactivated COS hydrolysis agent was heated to 150° C. and kept at 150° C. for 60 minutes while maintaining the above nitrogen flow;

[0051] 2) In the state of keeping the nitrogen flowing, pass the mixed gas of carbon monoxide and hydrogen into the quartz tube (the passing rate of carbon monoxide is 10mL / min, the volume space velocity is 600h -...

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Abstract

The invention relates to the technical field of regeneration of deactivated catalysts, in particular to a regeneration method of a deactivated COS hydrolytic agent. The regeneration method of the inactivated COS hydrolytic agent comprises the following steps: under the atmosphere of reducing gas, carrying out primary heating and heat preservation on the inactivated COS hydrolytic agent to obtain afirst regenerated COS hydrolytic agent; and maintaining the atmosphere of the reducing gas, carrying out secondary heating on the first regenerated COS hydrolytic agent, introducing carbon dioxide gas containing saturated steam into the atmosphere of the reducing gas, and carrying out heat preservation at a secondary heating temperature to obtain the regenerated COS hydrolytic agent. The regeneration method of the inactivated COS hydrolytic agent provided by the invention is a green regeneration method which does not need to be washed by a solution, does not add an active component additive and can effectively save the regeneration period.

Description

technical field [0001] The invention relates to the technical field of deactivated catalyst regeneration, in particular to a regeneration method of a deactivated COS hydrolysis agent. Background technique [0002] COS, the Chinese name carbonyl sulfide, often appears in the reducing atmosphere produced by industry, even a trace amount of COS (200mg / Nm 3 Left and right) not only is it easy to corrode industrial production equipment, but also untreated carbonyl sulfide COS directly discharged into the atmosphere will promote photochemical reactions and form sulfate aerosols, which seriously endanger people's health. At present, the treatment method of COS generally adopts catalytic hydrolysis method, and uses COS hydrolysis agent to convert COS into hydrogen sulfide (H2S) which is easy to handle. 2 S), and then the hydrogen sulfide is removed. However, after the COS hydrolysis agent is used in a micro-oxygen atmosphere for a period of time, sulfur element or sulfur salt spec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/04B01J38/06B01J38/02B01J38/10
CPCB01J38/02B01J38/04B01J38/06B01J38/10
Inventor 郑勇曹彦宁梁诗景肖益鸿刘时球江莉龙
Owner 中琉科技有限公司
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