System for preparing propionate through ethylene carbonylation

A technology for preparing propionate and carbonylation, which is applied in the separation/purification of carboxylate, carbon monoxide or formate reaction preparation, carboxylate preparation, etc. Pipeline clogging and other problems, to achieve the maximum separation, increase the reaction rate and enhance the effect of utilization

Pending Publication Date: 2022-04-29
PUJING CHEM IND SHA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The applicant of the present invention found that, first of all, the carbonylation reactor in this patent still adopts a high-pressure reactor with stirring function, and there is still the problem that the two phases of gas and liquid cannot be fully contacted to affect the reaction rate; secondly, the flash evaporator of this patent Most of the heavy phase in the heavy phase is directly recycled into the carbonylation reactor, and a part of the deactivated catalyst (solid) will enter the reactor together with the heavy components of the tower kettle, which will affect the catalytic reac

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  • System for preparing propionate through ethylene carbonylation
  • System for preparing propionate through ethylene carbonylation
  • System for preparing propionate through ethylene carbonylation

Examples

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Effect test

Embodiment 1

[0049] A system for the carbonylation of ethylene to propionates, such as figure 1 As shown, including the bubbling reactor R1 and the separation and refining unit, the gas phase reaction raw material G1 and the liquid phase reaction raw material L1 for the preparation of the propionate product L6 are carbonylated in the bubbling reactor R1, and the generated product containing propane The ester material L2 is separated and purified by the separation and refining unit to obtain the propionate product L6. In this embodiment, the material L2 containing propionate preferably enters the separation and refining unit through the side line of the bubbling reactor R1. In this embodiment, it is further preferred that the separation and refining unit includes a flash tower B1 connected to the side line of the bubble reactor R1 and using a side feed, and a flash tower B1 connected to the top of the flash tower B1 and using a side feed. Feed refining column B2.

[0050] More specificall...

Embodiment 2

[0060] A system for the carbonylation of ethylene to propionates, such as figure 2 As shown, including the bubbling reactor R1 and the separation and refining unit, the gas phase reaction raw material G1 and the liquid phase reaction raw material L1 for the preparation of the propionate product L6 are carbonylated in the bubbling reactor R1, and the generated product containing propane The ester material L2 is separated and purified by the separation and refining unit to obtain the propionate product L6. In this embodiment, the material L2 containing propionate preferably enters the separation and refining unit through the side line of the bubbling reactor R1. In this embodiment, it is further preferred that the separation and refining unit includes a flash tower B1 connected to the side line of the bubble reactor R1 and using a side feed, and connected to the top of the flash tower B1 and using a side feed. Feed refining column B2 and a membrane-based solid-liquid separator...

Embodiment 3

[0072] This embodiment is basically the same as Embodiment 2, the difference is that 1) in this embodiment, the material L2 containing propionate enters the separation and refining unit through the bottom end of the bubbling reactor R1, such as image 3 Shown; 2) in the present embodiment, the technology of ethylene carbonylation continuous methyl propionate, adopts above-mentioned system, comprises the following steps:

[0073]S1: The gas-phase reaction raw material G1 and the liquid-phase reaction raw material L1 enter the bubbling reactor R1 respectively, and react at a reaction temperature of 160°C and an operating pressure of 2.0 MPa. The volume ratio of carbon monoxide and ethylene in the gas phase reaction raw material G1 is 10:1, and the supply rate of CO is 1.5NL / min. The liquid-phase reaction raw material L1 is a low-carbon alcohol solution containing a catalyst system, and the catalyst system adopts a homogeneous catalyst system composed of palladium acetate, triphe...

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Abstract

The invention relates to a system for preparing propionate through ethylene carbonylation. The system comprises a separating and refining unit and a bubbling reactor (R1) coupled with the separating and refining unit, a gas-phase reaction raw material (G1) and a liquid-phase reaction raw material (L1) for preparing the propionate product (L6) are subjected to a carbonylation reaction in a bubbling reactor (R1), and a generated propionate-containing material (L2) is separated and purified by a separating and refining unit to prepare the propionate product (L6). Compared with the prior art, through the bubbling reactor, gas-liquid two-phase contact is more sufficient, the gas-liquid two-phase reaction rate is increased, and the raw material conversion rate is increased; the content of the deactivated catalyst in the material returned to the reactor is reduced through the membrane-based solid-liquid separator, the enrichment and regeneration of the deactivated catalyst can be realized, and the utilization rate of the catalyst is also improved.

Description

technical field [0001] The invention relates to the technical field of ethylene carbonylation to produce propionate, in particular to a system for ethylene carbonylation to produce propionate. Background technique [0002] Methyl propionate (MP) is a colorless transparent liquid that is slightly soluble in water but miscible in ethanol and ether, and has the general properties of an ester. As an important raw material in the organic synthesis industry, methyl propionate can be used to synthesize ethyl propionate and benzyl propionate through transesterification for the production of wine and flavor industries, and it is also a high-grade solvent for food and cosmetics and antiseptic additives. [0003] According to the different raw materials and the way to produce products, the traditional preparation process of methyl propionate is divided into two types: the process of synthesizing propionic acid and co-production of propionate, and the process of directly catalyzing est...

Claims

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Application Information

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IPC IPC(8): C07C67/38C07C67/48C07C67/54C07C67/56C07C69/24B01J10/00
CPCC07C67/38C07C67/48C07C67/54C07C67/56B01J10/002C07C69/24
Inventor 劳依杰骆念军平俊峰
Owner PUJING CHEM IND SHA
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