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Regeneration method of inactivated carbonyl sulfide hydrolysis catalyst taking activated carbon as carrier

A technology of hydrolysis catalyst and carbonyl sulfide, which is applied in the field of regeneration after deactivation of the preparation of carbonyl sulfide hydrolysis catalyst, can solve the problems such as non-regeneration, and achieve the effect of simple regeneration method, high activity, and simple and easy-to-obtain impregnation solution

Inactive Publication Date: 2010-03-17
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiency that the existing carbonyl sulfide hydrolysis catalyst cannot be regenerated after being deactivated, and to provide a method for regenerating the deactivated carbonyl sulfide hydrolysis catalyst with activated carbon as the carrier, so that the carbonyl sulfide hydrolysis catalyst can be regenerated after deactivation , to save resources and improve economic efficiency

Method used

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  • Regeneration method of inactivated carbonyl sulfide hydrolysis catalyst taking activated carbon as carrier

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Experimental program
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Effect test

Embodiment 1

[0023] The 3g carbonyl sulfide hydrolysis catalyst I with the coal-based activated carbon as the carrier after the above-mentioned deactivation is put in a conventional tube furnace, under N 2 Under air protection, roast at 150°C for 3 hours, then wash with distilled water for 40 minutes on a conventional ultrasonic instrument at a temperature of 30°C and a frequency of 45KHz ultrasonic waves, dry at 120°C for 3 hours, and then add 0.24g Na 2 CO 3 Dissolve in 6ml of distilled water, impregnate the dried catalyst in it, use the same ultrasonic instrument as above, immerse for 20min under the conditions of 30°C and 40Hz ultrasonic assist, and finally dry at 120°C for 3h. The activity test of the catalyst was carried out in a fixed-bed reactor (Φ4mm×100mm), and the reaction conditions were: take 0.4g of the regenerated catalyst, the temperature was 70°C, and the space velocity was 1000h -1 , COS concentration 2565mg / m 3 , the oxygen concentration is 0.5%, and no H is detected a...

Embodiment 2

[0026] Put the deactivated 3g carbonyl sulfide hydrolysis catalyst II with coal-based activated carbon as the carrier in a conventional tube furnace, N 2 Under protection, it was roasted at 200°C for 4h, and then washed with distilled water for 30min on a conventional ultrasonic instrument at a temperature of 30°C and a frequency of 45KHz ultrasonically assisted, and dried at 130°C for 3h, and then 0.3g NaHCO 3Dissolve in 6ml of distilled water, impregnate the dried catalyst in it, use the same ultrasonic instrument as above, immerse for 30min under the assisted conditions of 30°C and 40Hz ultrasonic waves, and finally dry at 110°C for 6h. The activity test of the catalyst was carried out in a fixed-bed reactor (Φ4mm×100mm), and the reaction conditions were: take 0.4g of the regenerated catalyst, temperature 70°C, space velocity 1000h -1 , COS concentration 2245mg / m 3 , the oxygen concentration is 0.5%, and no H is detected at the reaction outlet 2 S, and COS catalytic hydro...

Embodiment 3

[0029] The deactivated 3g carbonyl sulfide hydrolysis catalyst III with coconut shell activated carbon as a carrier is placed in a tube furnace, N 2 Under protection, it was roasted at 250°C for 3h, then washed with distilled water for 20min on a conventional ultrasonic instrument at a temperature of 30°C and a frequency of 28KHz, and then dried at 110°C for 6h, and then 0.27g NaOH was dissolved in Immerse the dried catalyst in 6ml of distilled water, use the same ultrasonic instrument as above, immerse for 40min at 30°C and 40Hz ultrasonic assist conditions, and finally dry at 120°C for 4h. The activity test of the catalyst was carried out in a fixed-bed reactor (Φ4mm×100mm), and the reaction conditions were: take 0.4g of the regenerated catalyst, the temperature was 70°C, and the space velocity was 2000h -1 , COS concentration 1825mg / m 3 , the oxygen concentration is 0.5%, and no H is detected at the reaction outlet 2 S, and COS catalytic hydrolysis purification effect is ...

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Abstract

The invention provides a regeneration method of an inactivated carbonyl sulfide hydrolysis catalyst taking activated carbon as a carrier. The regeneration method comprises the following steps: roasting an inactivated catalyst for 3-4 hours at the temperature of 150-300 DEG C in a tube furnace; then washing for 20-40 minutes by using distilled water, drying for 3-6 hours at the temperature of 110-130 DEG C, then immersing in alkaline solutions such as Na2CO3 and NaHCO3 for 20-40 minutes, and finally, drying for 3-6 hours at the temperature of 110-130 DEG C to obtain the regenerated catalyst. The regeneration method is simple and can be conducted at normal temperature, roasting process has low temperature and immersing process has simple operation, moreover the immersing liquor can be obtained easily, thus being easy for realizing industrialization; the catalyst after regeneration has high activity, can lead the conversion rate of the COS (carbonyl sulfide) to achieve more than 95% and can be widely used for the removal of the COS in chemical raw material gas.

Description

technical field [0001] The invention relates to a regeneration method after deactivation of a catalyst, in particular to a regeneration method after deactivation of a carbonyl sulfide (COS) hydrolysis catalyst prepared by using activated carbon as a carrier. Background technique [0002] Carbonyl sulfide (COS) widely exists in the waste gas produced when coal, petroleum, and natural gas are used as raw materials for synthetic ammonia, methanol production, and viscose fiber production. Carbonyl sulfide not only pollutes the environment, but also corrodes pipelines, causing catalyst poisoning and deactivation in the subsequent production process, thereby affecting the quality of subsequent chemical products. CN101108339A discloses a medium-temperature carbonyl sulfide hydrolysis catalyst and its preparation method and application. 2 o 3 as the carrier, by adding V 2 o 5 Changing the composition of the catalyst to improve the anti-sulfation performance of the catalyst under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J38/64B01J38/02B01J23/92B01J27/28B01D53/86B01D53/48
Inventor 易红宏于丽丽唐晓龙宁平李华王红妍杨丽娜
Owner KUNMING UNIV OF SCI & TECH
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