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Catalyst for organic sulfur hydrolysis and preparation method thereof

A catalyst, organic sulfur technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as unfavorable wide application, high catalyst cost, and difficulty in sulfation, and achieve easy scale. The effect of popularization and utilization, improving the hydrolysis rate of organic sulfur, and simple preparation method

Active Publication Date: 2022-03-08
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the related art, the catalysts used for the hydrolysis of organosulfur include: γ-Al 2 o 3 Catalysts and titanium-based catalysts, wherein, γ-Al 2 o 3 The catalyst is prone to sulfation in the sulfur recovery unit, resulting in a rapid decline in the hydrolysis rate of organic sulfur and poor hydrolysis effect
Titanium-based catalysts are not easy to be sulfated, and the hydrolysis rate of organic sulfur can reach more than 90%, but the cost of the catalyst is relatively high, and the price is γ-Al 2 o 3 More than 5 times that of the catalyst, which is not conducive to wide application

Method used

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  • Catalyst for organic sulfur hydrolysis and preparation method thereof

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preparation example Construction

[0027] In view of the above technical problems, the embodiment of the present invention provides a method for preparing a catalyst for the hydrolysis of organic sulfur, as shown in the attached figure 1 Shown, this preparation method comprises the following steps:

[0028] Step 101, immersing α-gibbsite particles in an aqueous alcohol solution to obtain a mixed solution.

[0029] Step 102, using a hydrothermal reactor to perform hydrothermal treatment on the mixed solution, and then filter and drain to obtain a drained sample.

[0030] Step 103, put the drained sample into a drying oven, blow in nitrogen gas to dry, and obtain a dried sample.

[0031] Step 104, put the dried sample into a tube furnace for roasting, and obtain a catalyst for hydrolysis of organic sulfur after cooling down.

[0032] The preparation method of the catalyst provided by the embodiments of the present invention can be used to prepare χ-Al 2 o 3 , wherein the α-gibbsite particles are used as the r...

Embodiment 1

[0070] This embodiment provides a χ-Al 2 o 3 Catalyst and preparation method thereof, specifically, the χ-Al 2 o 3 The catalyst is prepared by the following steps:

[0071] Step 1. Soak the α-gibbsite particles in an aqueous alcohol solution to obtain a mixed solution. Wherein, the alcohol is selected from methanol with a mass concentration of 95%; the ratio of the volume of the aqueous solution of alcohol to the bulk volume of the α-gibbsite particles is 1:1 (both 200 milliliters); the α-gibbsite particles The immersion time in the aqueous alcohol solution was 10 hours.

[0072] Step 2, using a hydrothermal reactor to perform hydrothermal treatment on the mixed solution, and then filtering and draining to obtain a drained sample.

[0073] Wherein, the temperature of the hydrothermal treatment is 100° C., and the time of the hydrothermal treatment is 24 hours.

[0074] Step 3, put the drained sample into a drying box, and pass through nitrogen to dry to obtain a dried sa...

Embodiment 2

[0080] This embodiment provides a χ-Al 2 o 3 Catalyst and preparation method thereof, specifically, the χ-Al 2 o 3 The catalyst is prepared by the following steps:

[0081] Step 1. Soak the α-gibbsite particles in an aqueous alcohol solution to obtain a mixed solution. Wherein, the alcohol is selected from ethanol with a mass concentration of 80%; the ratio of the volume of the aqueous solution of alcohol to the bulk volume of the α-gibbsite particles is 2:1 (400 milliliters and 200 milliliters respectively); The immersion time of the albite particles in the aqueous alcohol solution is 5 hours.

[0082] Step 2, using a hydrothermal reactor to perform hydrothermal treatment on the mixed solution, and then filtering and draining to obtain a drained sample.

[0083] Wherein, the temperature of the hydrothermal treatment is 200° C., and the time of the hydrothermal treatment is 10 hours.

[0084] Step 3, put the drained sample into a drying box, and pass through nitrogen to ...

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Abstract

The invention discloses a catalyst for organic sulfur hydrolysis and a preparation method thereof, and belongs to the field of catalysts.The preparation method comprises the steps that alpha-gibbsite particles are soaked in an aqueous solution of alcohol, and a mixed solution is obtained; carrying out hydrothermal treatment on the mixed solution by utilizing a hydrothermal reaction kettle, and then filtering and draining to obtain a drained sample; putting the drained sample into a drying oven, and introducing nitrogen for drying to obtain a dried sample; putting the dried sample into a tubular furnace for roasting, and cooling to obtain the catalyst for organic sulfur hydrolysis. The prepared catalyst is x-Al2O3, when the catalyst is used as a catalyst for organic sulfur hydrolysis, the organic sulfur hydrolysis rate can be remarkably increased, meanwhile, the preparation method is simple, and x-Al2O3 is low in cost and convenient to popularize and use on a large scale.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for hydrolysis of organic sulfur and a preparation method thereof. Background technique [0002] In industries such as oil refining, natural gas purification, and coal chemical industry, sulfur recovery equipment is usually used to recover sulfur. During operation, the combustion furnace in the sulfur recovery equipment will inevitably produce CS 2 and organic sulfur in the form of COS. Most of these organic sulfur will undergo hydrolysis reaction under the action of the catalyst in the Claus reactor, and the unhydrolyzed organic sulfur will enter the incineration furnace, and finally become SO 2 The form is exhausted into the atmosphere through the chimney. Therefore, in order to reduce exhaust SO 2 emissions, it is necessary to increase the rate of organic sulfur hydrolysis. [0003] In the related art, the catalysts used for the hydrolysis of organosulfur include: γ-Al ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J37/10B01J37/08B01J35/10B01D53/86B01D53/48C01F7/02C01F7/021C01F7/44C01F7/441
CPCB01J21/04B01J37/10B01J37/08B01D53/8603C01F7/021C01F7/441B01D2258/0283C01P2006/80B01J35/615
Inventor 李金金朱荣海刘宗社常宏岗熊钢张素娟陈昌介李小云许娟余军
Owner PETROCHINA CO LTD
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