A kind of method for preparing aldehyde compounds by two-phase hydroformylation of olefins

A technology of aldehyde compounds and hydroformyl, which is applied in the field of aldehyde synthesis, can solve the problems of poor catalyst recycling rate, harsh reaction conditions, and low conversion rate, and achieve high conversion rate, improved reaction activity, and high selectivity.

Active Publication Date: 2022-01-04
SICHUAN UNIV +1
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies or defects, the purpose of the present invention is to provide a method for preparing aldehyde compounds by two-phase hydroformylation of olefins, which can effectively solve the problems of harsh reaction conditions and low selectivity in the existing hydroformylation technology. , low conversion rate, poor catalyst recycling rate and unsuitable for hydroformylation of long-chain high-carbon olefins (≥C6)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of method for preparing aldehyde compounds by two-phase hydroformylation of olefins
  • A kind of method for preparing aldehyde compounds by two-phase hydroformylation of olefins
  • A kind of method for preparing aldehyde compounds by two-phase hydroformylation of olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment 1 provides a method for preparing aldehydes by two-phase hydroformylation of olefins, the specific process is: 0.03 grams of rhodium catalyst HRh (CO) (TPPTS) 3 , 0.05 g of TPPTS, 6 mL of formamide and 2.5 mL of 1-octene were added to a stainless steel autoclave with a magnetic stirrer and a temperature controller, and then the synthesis gas was introduced into the autoclave to replace the air in the autoclave, and repeated for 3 Once, then fill the synthesis gas with the pressure ratio of hydrogen and carbon monoxide at 1:1 to 1MPa, raise the temperature to 70°C, then react at constant temperature and pressure at a stirring speed of 1000rpm for 2 hours, cool to room temperature, release the pressure, and separate the mixture immediately after taking it out. It consists of upper and lower layers, and the composition of the upper layer is analyzed by gas chromatography. It is calculated that the conversion rate of 1-octene is 97.3%, the selectivity of nona...

Embodiment 2

[0028] This embodiment 2 provides a method for preparing aldehyde compounds by two-phase hydroformylation of olefins, the specific process is: 0.03 gram of rhodium catalyst HRh (CO) (TPPTS) 3 , 0.05 grams of TPPTS, 6 mL of water and 2.5 mL of 1-octene were added to a stainless steel autoclave with a magnetic stirrer and a temperature controller, and then the air in the autoclave was replaced by synthesis gas, repeated 3 times , then filled with synthesis gas with a pressure ratio of hydrogen and carbon monoxide of 1:1 to 1MPa, heated to 70°C, then reacted at a constant temperature and pressure at a stirring speed of 1000rpm for 2 hours, cooled to room temperature, and released the pressure. After the mixture was taken out, it was divided into There are two upper and lower layers, and the composition of the upper layer is analyzed by gas chromatography. After calculation, the conversion rate of 1-octene is 20.4%, the selectivity of nonanal is 50.7%, and the selectivity of linear...

Embodiment 3

[0030] This embodiment 3 provides a method for preparing aldehydes by two-phase hydroformylation of olefins, the specific process is: 0.03 grams of rhodium catalyst RhCl (CO) (TPPTS) 2 , 0.13 g of TPPTS, 12 mL of formamide and 3.6 mL of 1-octene were added to a stainless steel autoclave with a magnetic stirrer and a temperature controller, and then the synthesis gas was introduced into the autoclave to replace the air in the autoclave, and repeated for 3 Once, then fill the synthesis gas with hydrogen and carbon monoxide pressure ratio of 1:1 to 2MPa, raise the temperature to 60°C, then react at a constant temperature and pressure with a stirring speed of 1000rpm for 2.5 hours, cool to room temperature, release the pressure, and separate the mixture immediately after taking it out. It consists of upper and lower layers, and the composition of the upper layer is analyzed by gas chromatography. It is calculated that the conversion rate of 1-octene is 95.8%, the selectivity of non...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for preparing aldehyde compounds by two-phase hydroformylation of olefins, and belongs to the technical field of aldehyde synthesis. Formamide, N-methylformamide, N,N-dimethylformamide, etc. are used as solvents to make alkenes and H 2 / CO synthesis gas hydroformylation reaction to generate aldehydes, because the solubility of olefins in large polar organic solvents is much greater than its solubility in water, the reactivity is greatly improved compared with water-oil two-phase hydroformylation; reaction After the end, the system automatically separates phases, the upper layer is the product aldehyde with low polarity, and the lower layer is the high polarity solvent phase, and the water-soluble catalyst is dissolved in the high polarity solvent phase, and the multiple cycles of the catalyst can be realized through the liquid separation operation Utilization; the invention has the characteristics of mild reaction conditions, high selectivity and high conversion rate, and the catalyst can be circulated for a long time, and has excellent industrial application prospects.

Description

technical field [0001] The invention relates to the technical field of aldehyde synthesis, in particular to a method for preparing aldehyde compounds by two-phase hydroformylation of olefins. Background technique [0002] Hydroformylation is one of the most widely used homogeneous catalytic reactions in industry. The product aldehyde is an important chemical raw material, its hydrogenation can produce alcohol, alcohol can be further prepared into cosmetics, skin care products, detergents, plasticizers, surfactants, etc., aldehyde can be further converted into carboxylic acid, ester, amine Wait. In addition to long-chain aldehydes, aldehydes produced by the hydroformylation of some special olefins such as styrene are also very important chemical structural units, and are often used as intermediates in the synthesis of fine chemicals and pharmaceuticals. And for cyclic dienes, their reactivity is much lower than that of chain olefins, but the dialdehyde products produced by ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/50C07C47/02
CPCY02P20/584
Inventor 郑学丽陈华易继伟付海燕袁茂林李瑞祥
Owner SICHUAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap