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Process of hydroformylation

A process method and medium technology, applied in the direction of organic chemical methods, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., to achieve the effects of increasing yield, easy removal, and easy recovery

Inactive Publication Date: 2004-07-14
JOHNSON MATTHEY DAVY TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A further disadvantage associated with the presence of acidic media is the cost associated with the consumption of alkali required to neutralize the acid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0196] The reactor is again run at 110°C but withdraws 0.2 wt% of the purge equivalent of the recycle stream as figure 2 The rhodium is recovered by treatment and returned to the reactor.

[0197] Figure 4 Shows how the conversion of olefins and the overall performance of the reactor reached a steady state, i.e. close to a straight line after about 1000 hours, the heavies were well controlled below 60 wt%, and the reactor was run continuously under these conditions.

Embodiment 2

[0201] Comparative Example 2 was repeated except that the poisons in the wash were not reused with the rhodium. After 1000 hours, the heavies concentration reached a steady state of about 50 wt%. The level of olefin conversion was marked but continued with a small decrease over 5000 hours. like Image 6 As shown, after 5000 hours, a steady state is reached.

Embodiment 3

[0205] Example 1 was repeated, but with a feedstock containing 0.1 wt% non-volatiles and a 0.4 wt% cleaning rate increase. like Figure 8 As shown, after 1000 hours, the weight reaches a stable maximum of approximately 50 wt% in the recirculation.

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PUM

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Abstract

The present invention relates to a continuous hydroformylation process for the production of an aldehyde by hydroformylation of an olefin which comprises: providing a hydroformylation zone containing a charge of a liquid reaction medium having dissolved therein a rhodium hydroformylation catalyst comprising rhodium in combination with carbon monoxide and a ligand; supplying the olefin to the hydroformylation zone; maintaining temperature and pressure conditions in the hydroformylation zone conducive to hydroformylation of the olefin; recovering from the liquid hydroformylation medium a hydroformylation product comprising aldehyde; recovering from the hydroformylation zone a stream comprising the rhodium catalyst; contacting at least a portion of the stream with a solid acidic absorbent under process conditions which allow at least some of the rhodium to become bound to the absorbent; subjecting the rhodium bound to the absorbent, under process conditions which allow desorption of the metal, to a fluid stripping medium comprising hydrogen and solvent; recovering the rhodium hydride catalyst; and recycling the rhodium hydride catalyst to the hydroformylation zone.

Description

technical field [0001] The present invention relates to a kind of improved hydroformylation (hydroformylation) process, especially a kind of olefin hydroformylation process which generates aldehydes, most especially a kind of method for C 2 to C 20 Or higher olefin hydroformylation process, the use of its process conditions is unprecedented. Background technique [0002] Hydroformylation is a well-known reaction in which an olefin (usually a terminal olefin) reacts with hydrogen and carbon monoxide in the presence of a hydroformylation catalyst under appropriate conditions of temperature and pressure to produce an aldehyde or mixture of aldehydes that has one more aldehyde than the initial olefin carbon atom. Thus, hydroformylation with propylene will produce a mixture of n-butyraldehyde and isobutyraldehyde, the linear normal isomer of which is usually the desired more commercially valuable material. Hydrogen and carbon monoxide are usually supplied to the hydroformylati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/24B01J31/40B01J38/00B01J38/04B01J38/12C07B61/00C07C45/50C07C47/02
CPCC07C45/50Y02P20/584C07C47/02C07C45/79
Inventor 詹姆士·安德鲁·巴尼斯特乔治·埃德温·哈里森
Owner JOHNSON MATTHEY DAVY TECH LTD