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Preparing of cyclobexene catalyst for benzene selective hydrogenation its preparation method and regulating method and regeneration method

A technology for selective hydrogenation and cyclohexene, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of not providing catalyst preparation technology, and achieve Ease of modulation, maintenance of stability, and mild regeneration conditions

Inactive Publication Date: 2005-03-23
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 1107757A ruthenium-based regenerated catalyst does not provide catalyst preparation technology
Other related ruthenium-based catalyst regeneration technologies have not been reported

Method used

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  • Preparing of cyclobexene catalyst for benzene selective hydrogenation its preparation method and regulating method and regeneration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 2.8gRuCl 3 ·nH 2 O and 0.01g LaCl 3 ·nH 2 O was dissolved in an appropriate amount of distilled water, and 6.5g of ZrO was added 2 , stirred for 1h. Then 2.8g NaBH 4 The solution was added dropwise, and after the reaction was complete, the stirring was continued for a period of time to reduce Ru and La to the metal state, and the layers were allowed to stand, and the supernatant liquid was decanted, and the black slurry in the lower layer was retained. The solids content is 20%, and the pH value of the slurry is 8.

[0037] Gained catalyst is 7.5g, wherein Ru is ZrO 2 10% of La and 1% of Ru.

Embodiment 2

[0039] Weigh 3.5RuCl 3 ·nH 2 O and 0.03g LaCl 3 ·nH 2 O was dissolved in an appropriate amount of distilled water, and 8 g of ZrO 2 , stirred for 1h. Then 3.5g NaBH 4 The solution was added dropwise, and after the reaction was complete, the stirring was continued for a period of time to reduce Ru and La to the metal state, and the layers were allowed to stand, and the supernatant liquid was decanted, and the black slurry in the lower layer was retained. The solids content is 30%, and the pH value of the slurry is 9.

[0040] Gained catalyst is 10g, wherein Ru is ZrO 2 13% of La and 3% of Ru.

Embodiment 3

[0042] Weigh 4.3gRuCl 3 ·nH 2 O and 0.05g LaCl 3 ·nH 2 O was dissolved in an appropriate amount of distilled water, and 10 g of ZrO was added 2 , stirred for 1h. Then 4.3g NaBH 4 The solution was added dropwise, and after the reaction was complete, the stirring was continued for a period of time to reduce Ru and La to the metal state, and the layers were allowed to stand, and the supernatant liquid was decanted, and the black slurry in the lower layer was retained. The solids content is 40%, and the pH value of the slurry is 10.

[0043] Gained catalyst is 12g, wherein Ru is ZrO 2 15% of La and 5% of Ru.

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Abstract

A catalyst able to be modified or regenerated by washing it with the purified water containing H2O2 and treating it by diluted acid can be used for preparing cyclohexane from benzene by selective hydrogenating. It contains an active component Ru, a RE element La or transition element Zn or Fe and a disperser, and is prepared by chemical reduction method or deposition method.

Description

[0001] Field: [0002] The invention belongs to catalysts containing metals, oxides or hydroxides, in particular to a catalyst for preparing cyclohexene by selective hydrogenation of benzene, its preparation method, modulation method and regeneration method. technical background: [0003] Since 1972, there have been more than 100 patents on the hydrogenation of benzene to cyclohexene. Such as Chinese patents CN93103689.5, CN93103687.9, CN94119103.6, etc. US patents US 3912787, US4575572, US 4678861, US 4734536, etc. Japanese patents JP[95,165,646], JP[96,125,171], JP[97,12,484], JP[98,139,692], etc., world patents WO 92 / 03379, WO 93 / 16972, etc., European patents EP 0552809A1, EP 0170915A2, etc. [0004] Most of the existing patented technologies and catalyst preparation processes are relatively complicated, which brings difficulties to industrialization. At the same time, most of the patented catalysts have low activity and selectivity, and do not yet have industrial applic...

Claims

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Application Information

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IPC IPC(8): B01J23/46B01J23/60B01J23/89C07C5/11C07C13/20
CPCY02P20/52
Inventor 刘寿长李利民王向宇
Owner ZHENGZHOU UNIV
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