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Hydroformylation process

A hydroformyl and hydrogenation reaction technology, applied in chemical/physical process, carbon monoxide reaction preparation, catalyst for physical/chemical process, etc., can solve the problems of low separation coefficient and poor separation effect, etc.

Active Publication Date: 2015-03-18
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separation effect is not good, and the separation coefficient (partition coefficient) of the product in the extraction solvent is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh Rh(acac)(CO) in the glove box 2(114mg, 0.435mmol) and three (2,4-di-tert-butylphenyl) phosphite (5.625g; 8.7mmol), put in the reaction flask, then add deoxygenated / water methylcyclohexane ( Methylcyclohexane, 26g), stirred to dissolve it. First heat the autoclave to 80°C, then evacuate it, and replace it with nitrogen. Repeat this three times and then lower it to room temperature. Add the prepared catalyst solution into the autoclave with a syringe. in CO / H 2 (1:1) mixed gas replaces the nitrogen in the reactor and pressurizes to 40 atm, raises the temperature of the reactor to 100° C., and then pressurizes to 50 atm.

[0032] DCPD (40 g; Fluka) and methylcyclohexane (4 g) were weighed, poured into a feeding bottle, and pumped with nitrogen for 30 minutes. Add DCPD to the reaction kettle at a flow rate of about 20 mL per hour (the total feeding time is about 2 hours). When the DCPD feed was complete, the reaction was continued for 2 hours. CO / H is continuousl...

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PUM

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Abstract

The invention relates to a processing procedure for hydroformylating cycloolefin by a rhodium metal catalyst, in particular to a method for reclaiming the rhodium metal catalyst. The method comprises the following steps: i, adding the cycloolefin into a rhodium catalyst solution, and heating the rhodium catalyst solution in hydrogen and carbon monoxide to carry out a hydroformylation reaction so as to form the cycloolefin into cycloaldehyde; ii, adding an extracting solution containing first cyclic alkanol into the rhodium catalyst solution to be mixed and separated into a first layer and a second layer, wherein the first layer essentially comprises the rhodium catalyst solution, and the second layer essentially comprises the extracting solution containing the first cyclic alkanol and the cycloaldehyde; and iii, separating the first layer solution and the second layer solution.

Description

【Technical field】 [0001] The present invention relates to a hydroformylation process of cycloolefins, more particularly to a method for recovering the rhodium metal catalyst of the process. 【Background technique】 [0002] Catalysts used in the chemical industry can be broadly classified into heterogeneous catalysts and homogeneous catalysts. Compared with heterogeneous catalysts, homogeneous catalysts have the advantages of high reactivity, high selectivity and milder reaction conditions. However, there are still many homogeneous catalyst reaction systems that cannot be commercialized. The most important factor is that homogeneous catalysts are not easy to separate, recover and reuse. [0003] Generally speaking, distillation should be the cheapest way to separate different substances such as catalyst, product, starting material and solvent. In distillation, if the product is not highly volatile, it is necessary to increase the temperature to produce a separation effect. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C45/50C07C47/28B01J23/46
Inventor 时国诚薛茂霖杨浩熏
Owner IND TECH RES INST