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Precious metal hydrodesulfurization catalyst as well as preparation method and application thereof

A hydrodesulfurization and precious metal technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc., can solve the problem of uneven distribution of active metal components, organic sulfide desorption Eliminate the problems of poor effect and poor thermal stability, and achieve the effects of good hydrodesulfurization effect, low price, improved dispersibility and anti-sintering ability

Inactive Publication Date: 2018-05-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome defects such as uneven distribution of active metal components, poor thermal stability, easy sintering, and poor removal effect on macromolecular organic sulfides in hydrodesulfurization catalysts in the prior art, thereby Provide a precious metal hydrodesulfurization catalyst and its preparation method and application

Method used

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  • Precious metal hydrodesulfurization catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0037] Preparation of cobalt-containing hydrotalcites by co-precipitation method: 6.4015g NaOH and 1.9875g anhydrous Na 2 CO 3 Dissolve in 200ml deionized water, stir for 20min, pour into a three-neck flask and continue stirring for 1h to obtain a precipitant solution; weigh 8.1852g Co(NO 3 ) 2 ·6H 2 O, 7.2116g Mg(NO 3 ) 2 ·6H 2 O and 7.0331g Al(NO 3 ) 3 9H 2 O and dissolved in 200ml deionized water, fully stirred and dissolved to obtain a mixed solution of cobalt salt, magnesium salt and aluminum salt; then use a peristaltic pump to slowly drop the mixed solution of cobalt salt, magnesium salt and aluminum salt Put it into the precipitant solution and stir vigorously. After the dropwise addition is completed, raise the temperature to 60°C, continue to stir for 1 hour, let it stand for 24 hours after the reaction is completed, centrifuge the reaction solution, collect the precipitate and wash it to pH = 7; then at 100°C After drying for 12 hours, CoMgAl-LDHs were obta...

Embodiment 2

[0040] Co-precipitation method to prepare cobalt-containing hydrotalcites: 6.3978g NaOH and 2.6523g anhydrous Na 2 CO 3 Dissolve in 200ml deionized water, stir for 20min, pour into a three-neck flask and continue stirring for 1h to obtain a precipitant solution; weigh 14.8745g Co(NO 3 ) 2 ·6H 2 O and 9.3783g Al(NO 3 ) 3 9H 2 O and be dissolved in 200ml deionized water, obtain the mixed solution of cobalt salt and aluminum salt after fully stirring and dissolving; Then with peristaltic pump, the mixed solution of cobalt salt and aluminum salt is slowly dripped in the precipitation agent solution with the speed of 6ml / min and Stir vigorously, after the dropwise addition is completed, raise the temperature to 60°C, continue to stir and react for 1h, after the completion of the reaction, let it stand for 24h, centrifuge the reaction solution, collect the precipitate and wash it to pH = 7; then dry at 100°C for 12h to obtain cobalt aluminum Hydrotalcite-like CoAl-LDHs.

[00...

Embodiment 3

[0043] Preparation of cobalt-containing hydrotalcites by co-precipitation method: 6.4017g NaOH and 3.1826g anhydrous Na 2 CO 3 Dissolve in 200ml deionized water, stir for 20min, pour into a three-necked flask and continue stirring for 1h to obtain a precipitant solution; weigh 4.4624g Co(NO 3 ) 2 ·6H 2 O and 5.6269g Al(NO 3 ) 3 9H 2 O and be dissolved in 200ml deionized water, obtain the mixed solution of cobalt salt and aluminum salt after fully stirring and dissolving; Then with peristaltic pump, the mixed solution of cobalt salt and aluminum salt is slowly dripped in the precipitation agent solution with the speed of 6ml / min and Stir vigorously, after the dropwise addition is completed, raise the temperature to 60°C, continue to stir and react for 1h, after the completion of the reaction, let it stand for 24h, centrifuge the reaction solution, collect the precipitate and wash it to pH = 7; then dry at 100°C for 12h to obtain cobalt aluminum Hydrotalcite CoAl-LDHs.

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Abstract

The invention belongs to the technical field of hydrodesulfurization catalysts and particularly relates to a precious metal hydrodesulfurization catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and precious metal active components; a precursor of the carrier is cobalt-containing hydrotalcite; the precious metal active components are distributed onthe surface of the cobalt-containing hydrotalcite. In the preparation process of the catalyst, precious metal simple substances are reduced and immobilized by adopting a self-reduction mode during theloading process of the precious metal active components, i.e., the aim of reducing precious metal is achieved by using the reducibility of Co<2+> in like hydrotalcite and the oxidbillity of preciousmetal salt (PtCl4<2-> and PdCl4<2->). Compared with a traditional impregnation method, the preparation method has a better dispersion effect; in addition, the precious metal hydrodesulfurization catalyst is better immobilized on the surface of the carrier; oxidative active sites are uniformly distributed on the surface of the catalyst by high-temperature roasting.

Description

technical field [0001] The invention belongs to the technical field of hydrodesulfurization catalysts, and in particular relates to a noble metal hydrodesulfurization catalyst and its preparation method and application. Background technique [0002] As we all know, with the increasing shortage of energy resources in the world, the heavy and poor quality of crude oil worldwide is becoming more and more serious. At the same time, the environmental protection law is becoming increasingly strict, and the development of high-performance deep hydrodesulfurization (HDS) catalysts has become a hot spot in the field of hydrorefining. For the sulfur-containing compounds in gasoline and diesel, it will include some organic sulfur compounds that are difficult to remove, such as thiophene and alkyl-substituted dibenzothiophene, etc., in the traditional CoMo / Al 2 o 3 Hydrodesulfurization catalysts can achieve the removal of small molecular sulfur through the direct desulfurization (DDS)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/08B01J37/03B01J37/10C10G45/10
CPCB01J23/8913B01J23/8946B01J37/03B01J37/088B01J37/10C10G45/10C10G2300/202
Inventor 江莉龙米金星曹彦宁马永德
Owner FUZHOU UNIV
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