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A kind of olefin isomerization catalyst system and its application

A catalyst and system technology, applied in the direction of catalyst, catalytic reaction, isomerization hydrocarbon production, etc., can solve the problems of high cost and harsh heterogeneous catalytic reaction conditions, and achieve design and manufacturing cost reduction, diversification of reaction types, catalytic high efficiency effect

Inactive Publication Date: 2019-01-15
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides an olefin isomerization catalyst system and its application. Homogeneously catalyze the double bond isomerization, cis-trans isomerization and tautomerization of olefins under the same conditions, thereby solving the technical problems of harsh heterogeneous catalytic reaction conditions, high cost, and strict requirements for the absence of oxygen and water in the homogeneous ruthenium catalyst system

Method used

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  • A kind of olefin isomerization catalyst system and its application
  • A kind of olefin isomerization catalyst system and its application
  • A kind of olefin isomerization catalyst system and its application

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Effect test

Embodiment 1-6

[0029] (1) Catalytic eugenol isomerization reaction under different solvents

[0030] A catalyst system, the main catalyst RuH 2 CO (PPh 3 ) 3 and the organic solution of the second metal salt magnesium trifluoromethanesulfonate, the molar ratio of the main catalyst and magnesium trifluoromethanesulfonate is 1:,2, and the concentration of the main catalyst is a set value. The above catalyst system was used to catalyze the isomerization reaction of eugenol, the main catalyst RuH 2 CO (PPh 3 ) 3 The molar ratio of eugenol and eugenol is 1:200, add a stirring magnet, immediately put it into an oil bath heated to 80°C with a magnetic stirrer at the bottom, and start counting the reaction time. After reacting for 0.5 hours, samples were analyzed by gas chromatography, and the eugenol conversion rate and isomerization yield were calculated by the internal standard method as a result of the chromatographic analysis. The reaction solution was distilled under reduced pressure to ...

Embodiment 7-17

[0035] (2) Adding different second metal salts to catalyze the isomerization reaction of eugenol

[0036] A catalyst system, the main catalyst RuH 2 CO (PPh 3 ) 3 and the ethanol solution of the second metal salt, the molar ratio of the main catalyst to the second metal salt is 1:2, and the concentration of the main catalyst is 1 mmol / L. The above catalyst system was used to catalyze the isomerization reaction of eugenol, the main catalyst RuH 2 CO (PPh 3 ) 3The molar ratio of eugenol and eugenol is 1:200, add a stirring magnet, immediately put it into an oil bath heated to 80°C with a magnetic stirrer at the bottom, and start counting the reaction time. After reacting for 0.5 hours, samples were analyzed by gas chromatography, and the eugenol conversion rate and isomerization yield were calculated by the internal standard method as a result of the chromatographic analysis. The reaction solution was distilled under reduced pressure to obtain the reaction product, which w...

Embodiment 18-24

[0041] (3) Different additions of the second metal salt catalyze the isomerization reaction of eugenol

[0042] A catalyst system, the main catalyst RuH 2 CO (PPh 3 ) 3 and an ethanol solution of magnesium trifluoromethanesulfonate, the mol ratio of the main catalyst and magnesium trifluoromethanesulfonate is a set value, and the concentration of the main catalyst is 1 mmol / L. The above catalyst system was used to catalyze the isomerization reaction of eugenol, the main catalyst RuH 2 CO (PPh 3 ) 3 When the molar ratios of eugenol and eugenol are 1:200 and 1:1000 respectively, add a stirring magnet, immediately put it into an oil bath heated to 80°C and equipped with a magnetic stirrer at the bottom, and start counting the reaction time. After reacting for 0.5 hours, samples were analyzed by gas chromatography, and the eugenol conversion rate and isomerization yield were calculated by the internal standard method as a result of the chromatographic analysis. The reaction ...

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Abstract

The invention discloses an olefin isomerization catalyst system and its application. The catalyst system is an organic solution formed by dissolving the ruthenium complex RuH2CO(PPh3)3 and a second metal salt in a solvent. The second metal salt is a metal salt containing non-redox active metal ions. The molar ratio of the ruthenium complex RuH2CO(PPh3)3 and the second metal salt is between 1:0.5 and 1:4, and the concentration of the ruthenium complex RuH2CO(PPh3)3 is between 0.5 mmol / L and 5 mmol. / L between. The catalyst system of the present invention can be applied to olefin double bond isomerism, olefin cis-trans isomerism or olefin tautomerism containing hydroxyl functional groups, and solves the problem of air sensitivity and high temperature requirements of ruthenium complexes in catalyzing olefin isomerization systems. difficult problems, mild reaction conditions, high catalyst utilization, stable system, easy implementation, and low cost.

Description

technical field [0001] The invention belongs to the field of organic catalysis, and more specifically relates to an olefin isomerization catalyst system and its application. Background technique [0002] The isomerization reaction of olefins refers to the reaction of isomerizing olefins with a single structure into their isomers. The isomerization reaction of olefins is widely used in the preparation industry of olefins. Isoalkenes such as isobutene and isopentene are important basic organic raw materials. Isobutene is mainly used for gasoline additives, methyl tert-butyl ether, and polyisobutene. In production, isopentene is one of the important intermediates for the production of pesticides, medicines and spices. Isoeugenol and the series of products synthesized from it as raw materials play an important role in food and daily chemical flavors. At the same time, as an intermediate for the synthesis of various flavors, it also has a great demand in industrial production. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/24B01J31/26C07C41/32C07C43/23C07C43/215C07C5/25C07C11/02C07C13/263C07C37/00C07C39/21C07C11/107C07C11/113C07C15/52C07C45/51C07C49/04
CPCC07C5/2293C07C5/2593C07C37/001C07C41/32C07C45/512B01J27/053B01J27/10B01J27/25B01J31/0227B01J31/2409B01J31/26C07B2200/09C07C2531/24B01J2231/52B01J2531/821B01J35/19C07C43/23C07C43/215C07C11/02C07C13/263C07C39/21C07C11/107C07C11/113C07C15/52C07C49/04
Inventor 陈朱琦吕占傲尹国川郑文睿
Owner HUAZHONG UNIV OF SCI & TECH
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