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Method for hydrolyzing carbonyl sulphide (COS)

A carbonyl sulfide and material technology, applied in separation methods, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of narrow reaction temperature range, catalyst deactivation, low material space velocity, etc.

Active Publication Date: 2012-05-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved in the present invention is that the reaction temperature range of COS hydrolysis existing in the prior art is narrow, and the applicable material space velocity is low, when there is O in the material 2 To solve the problem of permanently deactivating the catalyst, a new method for the hydrolysis of carbonyl sulfide is provided

Method used

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  • Method for hydrolyzing carbonyl sulphide (COS)
  • Method for hydrolyzing carbonyl sulphide (COS)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Catalyst preparation: Weigh 75g of powdered γ-Al respectively 2 o 3 and 20g powdered La 2 o 3 , add 800ml of deionized water, hydrothermally treat at 85°C for 4 hours, and let stand for 10 hours; then dry at 110°C for 18 hours, press, crush, and sieve a sample of 40 to 60 meshes as the required carrier; weigh 20gNa 2 CO 3 Dissolved in 180g of pure water to prepare a 10% solution, impregnated 50g of the solution onto 95g of the carrier, and then dried at 110°C for 10 hours to obtain the required catalyst.

[0022] Carbonyl sulfide hydrolysis process experiment: according to the following process, the reaction was carried out in a Φ10×300 fixed bed quartz tube reactor, the temperature was 50°C, the COS content was 100ppm, the H 2 The molar ratio of O:COS is 10:1, and the space velocity is 5,000hr -1 , O in the material 2 The weight percent content is 0.3%. Evaluation results show that the COS conversion rate of the catalyst of the present invention is greater than...

Embodiment 2～11

[0024] Catalyst preparation: except that the type or amount of specific rare earth oxide, the specific type or amount of alkali metal carbonate or alkaline earth metal oxide, and the specific amount of aluminum oxide have changed, the catalyst preparation process is the same as in Example 1. The specific composition is shown in Table 1.

[0025] Carbonyl sulfide hydrolysis process experiment: based on reaction temperature, COS concentration, space velocity, O in the material 2 content and H 2 O:COS molar ratio is a variable, and the rest are the same as in Example 1, and the specific data are shown in Table 2. The data shows that the temperature range of the method of the present invention is 50-300°C, and the material space velocity can be as high as 20000h -1 , and when the material contains ≤1% O by weight 2 can function normally.

Embodiment 12

[0027] Get the catalyst prepared by Example 1, at 50-300°C, the space velocity is 10,000hr -1 , COS content is 100ppm, H 2 O:COS molar ratio is 5:1, O in the material 2 Under the condition that the weight percent content is 0.5%, the COS conversion rate is shown in Table 3, and the result further shows that the method of the present invention has a good temperature operating range.

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Abstract

The invention relates to a method for hydrolyzing carbonyl sulphide (COS), which is used for mainly solving the technical problems of narrower reaction temperature interval for COS hydrolysis, low applicative material airspeed and permanent inactivation of catalyst in the event of containing O2 in a material in the prior art. The technical problems are well solved by adopting the technical scheme as follows: the method for hydrolyzing the carbonyl sulphide comprises the step of reacting materials containing carbonyl sulphide and water in the presence of catalyst, wherein the catalyst comprises the following components in percentage by weight: (a) 1-5% of alkali carbonate, alkaline-earth metallic oxide or a mixture thereof; (b) 15-25% of rear-earth oxide in total; and (c) 70-82% of alumina. The method disclosed by the invention can be applied to industrial treatment of materials containing the carbonyl sulphide.

Description

technical field [0001] The present invention relates to a method for the hydrolysis of carbonyl sulfide. Background technique [0002] The carbonyl sulfide (COS) method widely exists in the chemical production process using coal, petroleum, and natural gas as raw materials. Its existence not only pollutes the environment, but also causes catalyst poisoning in the subsequent production process, product quality decline, and equipment corrosion. Hydrolysis is the most practical method to remove organic sulfur such as COS, and its process equation is: COS+H 2 O→H 2 S+CO 2 , to convert organosulfur to easily-handled H 2 S, and finally converted to S recycling. [0003] Japanese patent JP2,002,224,572 discloses a carbonyl sulfide catalyst and a method for hydrolyzing carbonyl sulfide. The catalyst supports sodium carbonate or potassium carbonate on γ-Al 2 o 3 Above, the COS hydrolysis reaction temperature is 200 °C. [0004] USP4,5111,668 discloses a TiO 2 It is a COS hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/48B01J23/10
Inventor 肖忠斌畅延青
Owner CHINA PETROLEUM & CHEM CORP
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