Check patentability & draft patents in minutes with Patsnap Eureka AI!

Propionic acid production process

A production process and technology of propionic acid, applied to the preparation of carboxylic acid by carbon monoxide reaction, preparation of carboxylic acid ester, separation/purification of carboxylic acid compounds, etc., can solve the problem of high production difficulty, and achieve the effect of improving reaction rate and flexible production plan

Pending Publication Date: 2022-05-06
湖北三里枫香科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a production process for propionic acid, which has the advantages of high production rate and separation of products, and solves the problem of high production difficulty

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
  • Propionic acid production process
  • Propionic acid production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of propionic acid production technology, comprises the following steps:

[0028] 1) The raw materials are ethanol, methanol and CO sent into the reactor, wherein the molar ratio of ethanol to methanol is 1:1, the reaction pressure of the reactor is controlled at 1MPa, the partial pressure of CO is controlled at 0.5MPa, the reaction temperature is 150°C, carbonylation The reaction is a liquid phase reaction. The gas CO must be dissolved in the liquid phase before the reaction can proceed. Therefore, the reaction pressure needs to be controlled to be high. When the reaction pressure increases, the partial pressure of CO also increases accordingly, which is conducive to the dissolution of CO in the reaction liquid. It is beneficial to the stability of the catalyst and the improvement of the reaction rate, the pressure continues to rise, and the improvement of the stability of the catalyst and the reaction rate is not obvious;

[0029] 2) The role of the raw material...

Embodiment 2

[0036] A kind of propionic acid production technology, comprises the following steps:

[0037]1) The raw materials are ethanol, methanol and CO fed into the reactor, wherein the molar ratio of ethanol to methanol is 1:1, the reaction pressure of the reactor is controlled at 3MPa, the partial pressure of CO is controlled at 1.75MPa, the reaction temperature is 200°C, carbonylation The reaction is a liquid phase reaction. The gas CO must be dissolved in the liquid phase before the reaction can proceed. Therefore, the reaction pressure needs to be controlled to be high. When the reaction pressure increases, the partial pressure of CO also increases accordingly, which is conducive to the dissolution of CO in the reaction liquid. It is beneficial to the stability of the catalyst and the improvement of the reaction rate, the pressure continues to rise, and the improvement of the stability of the catalyst and the reaction rate is not obvious;

[0038] 2) The role of the raw material ...

Embodiment 3

[0045] A kind of propionic acid production technology, comprises the following steps:

[0046] 1) The raw materials are ethanol, methanol and CO fed into the reactor, wherein the molar ratio of ethanol to methanol is 1:0, the reaction pressure of the reactor is controlled at 5MPa, the partial pressure of CO is controlled at 3MPa, the reaction temperature is 250°C, and the carbonylation reaction It is a liquid phase reaction. The gas CO must be dissolved in the liquid phase before it can react. Therefore, the reaction pressure needs to be controlled to be relatively high. When the reaction pressure increases, the partial pressure of CO also increases accordingly, which is conducive to the dissolution of CO in the reaction liquid. It is beneficial to the stability of the catalyst and the improvement of the reaction rate, the pressure continues to rise, and the improvement of the stability of the catalyst and the reaction rate is not obvious;

[0047] 2) The role of the raw mater...

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 relates to the technical field of propionic acid production, and discloses a propionic acid production process which comprises the following steps: 1) feeding raw materials, namely ethanol, methanol and CO, into a reactor; and 2) the raw material methanol is used for generating acetic acid through methanol carbonylation reaction, so that the reaction process of producing propionic acid through ethanol carbonylation is carried out in the acetic acid system mother liquor. According to the propionic acid production process, ethyl alcohol and methyl alcohol are used as raw materials, part of acetic acid can be produced as a byproduct while propionic acid is generated, the reaction rate of methyl alcohol carbonylation is higher than that of ethyl alcohol carbonylation production, methyl alcohol and CO are subjected to carbonylation reaction to generate acetic acid, acetic acid provides carboxylic acid groups for the ethyl alcohol esterification process, and therefore propionic acid is generated, and separation and recovery of complex products are achieved; although the generated acetic acid can increase the separation cost, the reaction rate of the propionic acid is greatly improved, industrialization is made possible, the production scheme is more flexible, and the yield of the propionic acid can be properly increased or reduced by adjusting according to the market conditions of the propionic acid and the acetic acid.

Description

technical field [0001] The invention relates to the technical field of propionic acid production, in particular to a propionic acid production process. Background technique [0002] Propionic acid is an important chemical raw material. Propionic acid and its derivatives are widely used in organic synthesis, coatings, inks, medicine, food and other fields. Propionic acid and propionates can be used as antifungal agents for grain and feed, Food additives, etc., the price of propionic acid is lower than that of sorbic acid, and its antifungal and mold performance is better than that of benzoic acid. It is recognized as the most economical and safe food preservative and antifungal agent. The esters of propionic acid are used in food, Perfume industry, in addition, propionic acid can be used in electroplating, emulsifier nitrocellulose solvent, and preparation of acetic acid-propionate cellulose, etc., and has a wide range of uses. [0003] At present, the industrialized product...

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 Applications(China)
IPC IPC(8): C07C53/122C07C51/12C07C51/10C07C51/42C07C51/44
CPCC07C51/12C07C51/10C07C17/093C07C67/08C07C51/42C07C51/44C07C53/122C07C19/07C07C69/14
Inventor 向家勇黄隆君严俨郭锐
Owner 湖北三里枫香科技有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com