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A method for the highly selective preparation of normal aldehydes by two-phase hydroformylation of olefins based on phosphine-functionalized polyether alkylguanidine salt ionic liquids

A technology of polyether alkyl guanidine and ionic liquid, which is applied in the field of highly selective preparation of n-formaldehyde by two-phase hydroformylation of olefins, can solve the problem of high dosage of ionic liquid, low catalytic activity, poor regioselectivity of n-formaldehyde, etc. question

Active Publication Date: 2018-10-12
永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous hydroformylation has the advantages of high catalytic activity, good selectivity and mild reaction conditions, but for a long time, the separation and recycling of rhodium catalysts has been the focus of attention in the field of homogeneous catalysis
But this two-phase system still has the following problems: one is that a large amount of ionic liquid is required as the carrier of the Rh-TPPTS catalyst, and the mass ratio of the ionic liquid to the rhodium catalyst precursor reaches 1000:1; Due to the limitation of mass transfer resistance, the catalytic activity is not high, and the TOF value is only 10-200h -1 The third is that the regioselectivity of normal aldehyde is relatively poor, and the anisotropic ratio is only 2.0:1-2.4:1 (67-71% of normal aldehyde regioselectivity)
Under this system, the phosphine-functionalized ionic liquid not only has the characteristics of a phosphine ligand, can form a complex catalyst with rhodium, but also has the solvent performance of an ionic liquid, and can serve as a carrier for a rhodium catalyst, so there is no need to add a large amount of other ions liquid, which fundamentally solves the problem of high dosage of ionic liquids, and also minimizes the negative effect of ionic liquids in catalytic reactions; but the system has very poor regioselectivity of normal aldehydes (<80%)

Method used

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  • A method for the highly selective preparation of normal aldehydes by two-phase hydroformylation of olefins based on phosphine-functionalized polyether alkylguanidine salt ionic liquids
  • A method for the highly selective preparation of normal aldehydes by two-phase hydroformylation of olefins based on phosphine-functionalized polyether alkylguanidine salt ionic liquids
  • A method for the highly selective preparation of normal aldehydes by two-phase hydroformylation of olefins based on phosphine-functionalized polyether alkylguanidine salt ionic liquids

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Rh(acac)(CO) 2 / BISBI-(SO 3 Na) 2 (o=p=1, q=r=2) / [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] / 1-octene two-phase hydroformylation reaction

[0027] Under an inert atmosphere, add Rh(acac)(CO) to a stainless steel autoclave 2 , BISBI-(SO 3 Na) 2 , [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] and 1-octene, the ratio is: BISBI-(SO 3 Na) 2 / Rh(acac)(CO) 2 =5:1 (molar ratio), 1-octene / Rh(acac)(CO) 2 =1000:1 (molar ratio), [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] / Rh(acac)(CO) 2 =300:1 (molar ratio), then use synthesis gas (H 2 / CO=1:1) pressurized to 5.0MPa, reaction temperature 100°C, reaction time 0.5 hours, then rapidly cooled to room temperature, vented the synthesis gas and opened the kettle, realized rhodium catalyst by two-phase separation of ionic liquid phase and organic phase The recovery of n-heptane can also be added for extraction, and the organic phase containing product aldehyde can be obtained through simple...

Embodiment 2

[0029] Rh(acac)(CO) 2 / BINA-(SO 3 Na) 2 (o=p=1, q=r=2) / [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] / 1-octene two-phase hydroformylation reaction

[0030] Under an inert atmosphere, add Rh(acac)(CO) to a stainless steel autoclave 2 , BINA-(SO 3 Na) 2 , [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] and 1-octene in a ratio of: BINA-(SO 3 Na) 2 / Rh(acac)(CO) 2 =5:1 (molar ratio), 1-octene / Rh(acac)(CO) 2 =5000:1 (molar ratio), [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] / Rh(acac)(CO) 2 =300:1 (molar ratio), then use synthesis gas (H 2 / CO=1:1) pressurized to 5.0MPa, reaction temperature 100°C, reaction time 0.5 hours, then rapidly cooled to room temperature, vented the synthesis gas and opened the kettle, realized rhodium catalyst by two-phase separation of ionic liquid phase and organic phase The recovery of n-heptane can also be added for extraction, and the organic phase containing product aldehyde can be obtained through simple tw...

Embodiment 3

[0032] Rh(acac)(CO) 2 / Xantphos-(SO 3 Na) 2 (o=p=1, q=r=2) / [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] / 1-octene two-phase hydroformylation reaction

[0033] Under an inert atmosphere, add Rh(acac)(CO) to a stainless steel autoclave 2 , Xantphos-(SO 3 Na) 2 , [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] and 1-octene in a ratio of: Xantphos-(SO 3 Na) 2 / Rh(acac)(CO) 2 =5:1 (molar ratio), 1-octene / Rh(acac)(CO) 2 =1000:1 (molar ratio), [Ph(EO) 16 N + H=C(N(CH 3 ) 2 ) 2 ][CH 3 SO 3 - ] / Rh(acac)(CO) 2 =300:1 (molar ratio), then use synthesis gas (H 2 / CO=1:1) pressurized to 5.0MPa, reaction temperature 100°C, reaction time 0.5 hours, then rapidly cooled to room temperature, vented the synthesis gas and opened the kettle, realized rhodium catalyst by two-phase separation of ionic liquid phase and organic phase The recovery of n-heptane can also be added for extraction, and the organic phase containing product aldehyde can be obtained throu...

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Abstract

The invention relates to a method for highly selective preparation of linear aldehyde by olefin two-phase hydroformylation based on a phosphine functionalized polyether alkyl guanidine salt ionic liquid. The method adopts a two-phase catalytic system, the catalytic system is composed of the phosphine functionalized polyether alkyl guanidine salt ionic liquid, a polyether alkyl guanidine salt ionic liquid, a rhodium catalyst, a reaction substrate olefin and a reaction product aldehyde, liquid / liquid two-phase hydroformylation reaction is carried out under certain reaction temperature and synthesis gas pressure, simple two-phase separation is carried out at the end of the reaction to realize separation and circulation of the rhodium catalyst, the rhodium catalyst can be used repeatedly, and the catalytic activity and selectivity do not decrease significantly. The TOF value of the system reaches 300-3400h<-1>, and the catalytic cycle cumulative TON value reaches 30832.

Description

technical field [0001] The invention relates to the technical field of chemistry and chemical engineering, in particular to a method for preparing normal aldehyde with high selectivity by two-phase hydroformylation of olefins based on phosphine-functionalized polyether alkylguanidine salt ionic liquid. Background technique [0002] The rhodium-catalyzed hydroformylation of olefins is a typical atom-economical reaction, and it is also a carbonylation reaction with more reports in the literature. It has become an ideal method for the preparation of high-carbon aldehydes / alcohols. Homogeneous hydroformylation has the advantages of high catalytic activity, good selectivity and mild reaction conditions, but the separation and recycling of rhodium catalysts has been the focus of attention in the field of homogeneous catalysis for a long time. [0003] In recent years, the liquid / liquid two-phase catalytic system with ionic liquid as the catalyst carrier has developed very rapidly,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/50C07C47/02B01J31/24B01J31/06
CPCB01J31/0285B01J31/06B01J31/2414B01J31/2457B01J2231/321B01J2531/822C07C45/50C07C47/02Y02P20/50Y02P20/584
Inventor 金欣王凡李淑梅
Owner 永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建