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Catalyst for preparing ketone via cyclododecanol dehydrogenation and preparation method for same

A kind of cyclododecanol and catalyst technology, applied in the catalyst and preparation field of cyclododecanol dehydrogenation to ketone, can solve the problem that the catalyst is not further researched and modified, is not

Active Publication Date: 2013-04-24
中瀚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, none of the above-mentioned results have been applied to cyclododecanol dehydrogenation catalysts. Dodecyl alcohol dehydrogenation, but the catalyst itself has not been further studied and modified, so it is not a cyclododecanol dehydrogenation system with the best catalytic effect

Method used

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  • Catalyst for preparing ketone via cyclododecanol dehydrogenation and preparation method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Weigh 121g of copper nitrate trihydrate and 146g of zinc nitrate hexahydrate respectively, add them to 750ml of deionized water and stir to dissolve, so as to form a mixed solution of copper nitrate and zinc nitrate.

[0024] (2) Prepare a mixed solution of ammonium carbonate with a concentration of 1mol / L and ammonia water with a concentration of 0.6mol / L as a precipitant.

[0025] (3) Slowly add the above-mentioned salt solution and precipitant into a flask filled with 100ml of deionized water at the same time, and vigorously stir at the same time, and always control the pH value between 8 and 9 during the dropping process. After the dropwise addition was complete, vigorous stirring was continued for 3 hours.

[0026] (4) Suction filter and wash the above precipitate until the washing solution is neutral; then dry the washed precipitate at 100°C for 12 hours.

[0027] (5) Roast the dried precipitate in a tube furnace at 450°C for 6 hours, during which time NH 3 ...

Embodiment 2

[0032] (1) Weigh 160g of copper nitrate trihydrate and 96g of zinc nitrate hexahydrate respectively, add them to 750ml of deionized water and stir to dissolve, so as to form a mixed solution of copper nitrate and zinc nitrate.

[0033] (2) to (6) are the same as in Example 1.

[0034] (7) Weigh a certain amount of manganese nitrate and dissolve it in deionized water to prepare a 4wt% impregnation solution.

[0035] (8) As in Example 1, a CuZnMn dehydrogenation catalyst was prepared.

Embodiment 3

[0037] (1) Weigh 81g of copper nitrate trihydrate and 192g of zinc nitrate hexahydrate respectively, add them to 750ml of deionized water and stir to dissolve, so as to form a mixed solution of copper nitrate and zinc nitrate.

[0038] (2) to (6) are the same as in Example 1.

[0039] (7) Weigh a certain amount of lanthanum nitrate and dissolve it in deionized water to prepare a 4wt% impregnation solution.

[0040] (8) As in Example 1, a CuZnLa dehydrogenation catalyst was prepared.

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Abstract

The invention discloses a catalyst for preparing ketone via cyclododecanol dehydrogenation and a preparation method for the same. The catalyst is characterized by comprising a main catalyst and an auxiliary, wherein the main catalyst is a copper-zinc mixed oxide taking copper element as a main active ingredient and taking zinc element as a carrier, and the molar ratio of the copper element to the zinc element is 1: 3 to 3: 1; and the auxiliary is a transition metal element with an inactive centre and selected from one of vanadium, vanadium, manganese, zirconium, lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium or yttrium. Via an evaluation for the catalyst for cyclododecanol dehydrogenation prepared by the method disclosed by the invention on a micro reaction device in a laboratory, the conversion rate of cyclododecanol is greater than 95%, and the selectivity of cyclododecanone is greater than 98% in the conditions that a temperature is 230 DEG C, and a space velocity (WHSV (weight hourly space velocity)) is 0.4.

Description

technical field [0001] The invention belongs to the field of catalyst preparation, and in particular relates to a catalyst for producing ketone by dehydrogenation of cyclododecanol and a preparation method thereof. Background technique [0002] Cyclododecanone is an important chemical raw material intermediate, which is prepared by trimerizing butadiene to obtain cyclododecatriene, and then undergoes hydrogenation and oxidation to obtain a mixture of cyclododecanol and cyclododecanone (KA oil), in which cyclododecanol becomes pure cyclododecanone after dehydrogenation. Cyclododecanone is an important raw material in the perfume industry, such as muskone and muskpyridine, etc. are all produced from cyclododecanone, and it is also an important intermediate in the field of engineering plastics. Long-chain nylon resins PA12, PA1212, etc. It can be obtained from cyclododecatriene via the process route of cyclododecanone. [0003] At present, the catalysts for preparing cyclodod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86B01J23/889B01J23/83B01J23/80C07C49/413C07C45/51
Inventor 宁珅叶同奇黄志远
Owner 中瀚新材料科技有限公司
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