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Hydroformylation process

A formylation catalyst and catalyst technology, applied in organic chemistry, carbon-based compound preparation, chemical instruments and methods, etc., can solve problems such as high and heavy components, and achieve the effect of low capital cost

Active Publication Date: 2018-12-21
DOW TECH INVESTMENTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To achieve this at the pressures envisaged in the '369 patent, the crude aldehyde must be distilled at temperatures in excess of 190°C, which will result in the formation of high heavies

Method used

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Examples

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example

[0070] All parts and percentages in the following examples are by weight unless otherwise indicated. Pressures are given in absolute unless otherwise indicated.

example 1

[0072] Using chemical process simulation software to model a conventional oxo reaction system with two identical CSTR reactors (which is similar to that in Figure 21D of Process Economics Program Report 21D, OXO ALCOHOLS) (December 1999) The one described in Figure 4.6 is available from IHS Inc.). No compressor was used in the simulation. The catalyst was a typical Rh-TPP catalyst as described in U.S. Patent No. 4,148,830 (Example 13), and the reaction conditions were essentially those of Example 13 of said patent for propylene, except that the first reactor The initial target rhodium concentration was 250-350 ppm Rh. The TPP concentration in the reactor was about 10-11%. Based on an olefin feed rate of 33700 kg / h propylene (90-95% purity), the selected process conditions and unrefined aldehyde production are shown in Table 1:

[0073] based on figure 1 , the selected process conditions and the unrefined aldehyde production rate are shown in Table 1 (the material flow sequ...

example 2

[0079] as in figure 2 Depicted is an absorption column (20) in the form of an effluent scrubber for scrubbing the purge effluent from Reactor #2 (Oxoalcohol Process Economics Project Report 21D (December 1999) in Figure 4.6 (7) equivalent). Unless otherwise stated, references to equipment or streams in this Example 2 correspond to figure 2 . The stream from the purge effluent (21) is added to the middle of the absorption column (20). The absorption column (20) used for this simulation consisted of 33 trays. The output from the high-pressure evaporator (equivalent of stream (11) in Figure 4.6 of Oxoalcohol Process Economics Project Report 21D (December 1999)) is fed (20) at the bottom of the absorption column, and the combined The gas stream is contacted with the stripped aldehyde and the bottoms stream is combined with stream (10). The results shown in Table 2 show very high recovery of olefins from the effluent with very little loss of aldehydes. The remainder of the ...

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Abstract

Embodiments of the present invention relate to processes for the hydroformylation of olefins to produce aldehydes. In some embodiments, processes of the present invention are capable of maintaining high C2-C4 olefin conversion and / or provide more compact hydroformlyation processes.

Description

technical field [0001] The present invention relates to a process for the hydroformylation of olefins to produce aldehydes. Background technique [0002] Many hydroformylation processes involve further processing of the effluent stream from the hydroformylation reactor. Exhaust streams exist to prevent inert impurities such as N 2 , CO 2 , Ar, CH 4 and hydrocarbon accumulation). Inerts may enter the process as impurities in the feed. They are usually withdrawn prior to the product-catalyst separation zone to reduce the load on these separation systems. Large quantities of these inerts are also dissolved in the crude aldehyde product, which must be removed as effluent or purge gas in downstream refining. Unfortunately, the process of venting these inerts also often results in the loss of valuable reactants, such as alkenes. [0003] Many existing processes attempt to recover and recycle the olefins contained in these effluents. However, these processes typically invol...

Claims

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Application Information

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IPC IPC(8): C07C45/50C07C47/02
CPCC07C45/50C07C45/72C07C45/786C07C45/82C07C47/02B01D3/16B01D3/32B01D5/006B01D5/009C07C45/783
Inventor K·辛普森G·L·史密斯
Owner DOW TECH INVESTMENTS
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