Catalyst for selective hydrogenation of 3,7,11-trimethyl-1-dodecyne-3-alcohol

An alcohol selectivity and catalyst technology, applied in physical/chemical process catalysts, hydrogenation preparation, organic chemistry, etc., can solve problems such as low selectivity, product discoloration, and odor, and reduce the content of precious metal Pd and reaction conditions. The effect of mild, excellent catalytic performance
CN101862667BActive Publication Date: 2012-05-30SHANDONG NHU PHARMA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG NHU PHARMA
Publication Date
2012-05-30

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Abstract

The invention discloses a catalyst for selective hydrogenation of 3,7,11-trimethyl-1-dodecyne-3-alcohol to synthesize an important intermediate namely 3,7,11-trimethyl-1-dodecene-3-alcohol of vitamin E. The existing catalysts of the type have low selectivity or low product quality. The catalyst of the invention uses calcium carbonate as a carrier, Pd as an active ingredient and Pb and X as poisoning agents, wherein X refers to metal Mn or / and Zn. During the preparation of the catalyst, a Pd compound is adsorbed to the carrier to perform filtration first, and then perform reduction. The catalyst of the invention has high activity and high selectivity, the quality of a product is improved, and a selected preparation method can greatly reduce the content of the noble metal Pd in the catalyst.
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Description

technical field

[0001] The invention relates to a catalyst for synthesizing vitamin E intermediates, especially a catalyst for the selective hydrogenation of 3,7,11-trimethyl-1-dodeyn-3-ol to synthesize 3,7,11-tri Catalyst for methyl-1-dodecen-3-ol. Background technique

[0002] 3,7,11-Trimethyl-1-dodecen-3-ol is a straight-chain sesquiterpenoid pentadecyl unsaturated tertiary alcohol, and its molecular structure is:

[0003]

[0004] 3,7,11-Trimethyl-1-dodecen-3-ol is a key intermediate in the synthesis of vitamin E acetate and has important economic value.

[0005] So far, there are only sporadic reports on the chemical synthesis of 3,7,11-trimethyl-1-dodecen-3-ol in the open literature. Using poly-2-methyl-5-vinylpyridine as a catalyst and ethanol as a solvent, 3,7,11-trimethyl-1-dodeyn-3-ol is selectively hydrogenated to produce 3,7,11 -Trimethyl-1-dodecen-3-ol was studied. Through the comparison of different additives Co, Fe, Ni, it is found that adding Ni in the...

Claims

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