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Catalyst of inverting thiol in liquefied gas and producing process thereof

A catalyst and liquefied gas technology, which is applied in the field of desulfurization catalysts, can solve the problems of not meeting industrial application requirements, etc., and achieve the effects of high mercaptan conversion activity, long service life, and no lye discharge.

Inactive Publication Date: 2005-02-09
SINOPEC QILU CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] For the conversion of mercaptans contained in liquefied gas, the above-mentioned catalysts have some shortcomings in practical applications, and some indicators cannot meet the requirements of industrial applications, such as: catalyst strength, service life, conversion activity, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (a) Take γ-Al 2 o 3 100g (γ-Al 2 o 3 Particle size Φ3 ~ 5mm, total pore volume 0.45ml / g, specific surface area > 150m 2 / g, particle strength ≥ 60N), put in a 1000ml beaker, add 500ml of Na with a concentration of 0.4M 2 CO 3 The aqueous solution was left to stand at room temperature (20-30°C) for 24 hours, filtered, centrifuged to dry, and dried at 120°C for 16 hours until dry.

[0037] (b) The above-mentioned γ-Al 2 o 3 Put again in 1000ml beaker, add 450ml deionized water, 50ml hydrogen peroxide (30% concentration), cover, heat to 80~85 ℃, constant temperature 2 hours, filter, centrifuge and dry.

[0038] (c) The above-mentioned γ-Al 2 o 3 Place in a 1000ml beaker again, add 600ml aqueous solution, this aqueous solution contains: 0.05MLa (NO 3 ) 3 , 0.08MMn(AC) 2 , 0.1MCa (NO 3 ) 2 , control the temperature of the solution at 40-45°C, let it stand for 8 hours, and then filter the solution to obtain γ-Al 2 o 3 The carrier was placed in an oven at a con...

Embodiment 2

[0043] (a) process of above-mentioned embodiment 1, replace 0.4MNa with 0.25MKOH 2 CO 3 , other preparations and reaction evaluations are completely the same as in Example 1.

[0044] The reaction evaluation result is: the methyl mercaptan in the liquefied gas at the inlet of the reactor is 747mg / m 3 , the content of export methyl mercaptan is 1~3mg / m 3 . Use high space velocity to accelerate the deactivation of the catalyst, when the content of methyl mercaptan at the outlet of the reactor reaches 90-100mg / m 3 The running time is 290 hours.

Embodiment 3

[0046] In (b) process of above-mentioned embodiment 1, be the KMnO of 4.0M with 40ml concentration 4 Instead of 50ml of hydrogen peroxide (30% concentration), other preparation and reaction evaluation conditions are completely the same as in Example 1.

[0047] The reaction evaluation result is: the methyl mercaptan in the liquefied gas at the inlet of the reactor is 747mg / m 3 , the content of export methyl mercaptan is 1~3mg / m 3 . Use high space velocity to accelerate the deactivation of the catalyst, when the content of methyl mercaptan at the outlet of the reactor reaches 90-100mg / m 3 The running time is 280 hours.

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PUM

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Abstract

The mercaptol converting catalyst has gamma-Al2O3 as carrier and active components including VIII element(s) in carried amount of 0.5-50.0 wt%, transition metal element(s) in carried amount of 0.1-10.0 wt%, alkali or alkali earth element(s) in carried amount of 0.1-10.0 wt%, and RE element(s) in carried amount of 0.1-10.0 wt%. The preparation process includes the pre-treatment of carrier comprising presoaking in alkali solution and surface oxidation treatment; soaking the gamma-Al2O3 carrier in the solution of the inorganic salts of the active component for one or several times to carry the required active components; and finally drying. The mercaptol converting catalyst has high strength, high mercaptol converting activity and long service life, and is especially suitable for conversion of mercaptol in liquefied gas.

Description

technical field [0001] The present invention relates to the sweetening technology of liquefied gas, especially provides a kind of γ-Al 2 o 3 Supported sweetening catalyst. Background technique [0002] The mercaptans contained in liquefied gas are mainly methyl mercaptan and ethyl mercaptan, which have a great impact on the utilization of liquefied gas and environmental protection. 4 The catalyst used in the stacking process is very harmful. When the sulfur content is low, the catalyst can be used for several years, but when the sulfur content is high, the life of the catalyst is only a few months or even shorter. In addition, the pollution of high-mercaptan liquefied gas as a fuel to the atmospheric environment is also very serious. Therefore, the sulfur content of liquefied petroleum gas must be desulfurized to make the sulfur content meet the requirements. [0003] The method of sweetening liquefied gas was first proposed by UOP in 1958. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/48B01D53/86B01J23/84C10G70/00C10L3/00
Inventor 周广林孔海燕周红军
Owner SINOPEC QILU CO
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