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Production method of propylene (ethylene) carbonate by tubular reaction of carbon dioxide and propylene oxide (ethylene)

A technology of propylene carbonate and ethylene carbonate, which is applied in the production field of carbon dioxide and propylene (ethylene) oxide tubular reaction to produce propylene (ethylene) carbonate, which can solve the problem of insufficient gas-liquid contact in the reactor, reaction Problems such as untimely heat removal and low production efficiency can achieve the effects of easy control, low energy and material consumption, and high production efficiency

Active Publication Date: 2016-04-06
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the use of a tower reactor in the existing synthesis reaction of carbon dioxide and propylene oxide, there is a high investment in equipment; the reaction liquid needs to be cooled by external circulation, and the reaction heat is not removed in time; Insufficient gas-liquid contact, low production efficiency, etc.

Method used

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  • Production method of propylene (ethylene) carbonate by tubular reaction of carbon dioxide and propylene oxide (ethylene)
  • Production method of propylene (ethylene) carbonate by tubular reaction of carbon dioxide and propylene oxide (ethylene)

Examples

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Embodiment 1

[0019] The production method of producing propylene carbonate by tubular reaction, the raw materials used in the production process are propylene oxide, carbon dioxide and propylene carbonate synthesis catalyst. The production equipment used includes 10 (segment) tubular propylene carbonate synthesis reactors (3), 1 (segment) tubular catalyst mixer (1), 1 (segment) tubular carbon dioxide predisperser (2), gas-liquid separator (4), propylene carbonate separation and refining device (5), connecting pipelines and various accessories. The production method of producing propylene carbonate by tubular reaction includes: the catalyst and propylene oxide enter the tubular catalyst mixer (1) to form a mixed solution of catalyst and propylene oxide; carbon dioxide and circulating propylene carbonate enter the tubular carbon dioxide predisperser (2 ) to form a carbon dioxide dispersion; the mixed liquid of catalyst and propylene oxide, and the carbon dioxide dispersed in the circulating ...

Embodiment 2

[0021] Example 2 is basically the same as Example 1, except that the tubular catalyst mixer (1), the tubular carbon dioxide predisperser (2), and the tubular propylene carbonate synthesis reactor (3) are commercially available static mixers .

Embodiment 3

[0023] Embodiment 3 is substantially the same as Embodiment 1, except that the raw materials used in the production process are ethylene oxide, carbon dioxide and ethylene carbonate catalyst, and the product is ethylene carbonate.

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Abstract

The invention discloses a production method for preparing propylene (ethylene) carbonate from carbon dioxide and propylene oxide (ethylene oxide) through tubular reaction. The production method comprises the following steps: feeding a catalyst and propylene oxide (ethylene oxide) mixture liquid and carbon dioxide dispersed in circulating propylene (ethylene) carbonate into a tubular propylene (ethylene) carbonate synthesis reactor (3) in parallel, and mixing to react when flowing; taking out the reaction heat by using an outer jacket of the tubular propylene (ethylene) carbonate synthesis reactor (3); adjusting the amount of a cooling medium inside different tube sections of the tubular propylene (ethylene) carbonate synthesis reactor (3) to obtain appropriate reactor axial temperature distribution; feeding crude propylene (ethylene) carbonate discharged from the tubular propylene (ethylene) carbonate synthesis reactor (3) into a gas-liquid separator (4), releasing excessive carbon dioxide, and subsequently feeding into a propylene (ethylene) carbonate separation and refining device (5), thereby obtaining a product, that is, propylene (ethylene) carbonate. The production method is excellent in mass transfer and heat conduction effect, the reaction heat can be removed in time, and the production process is stable, easy to control and convenient to operate.

Description

technical field [0001] The invention relates to a production method of chemical products, in particular to a production method for producing propylene carbonate by tubular reaction of carbon dioxide and propylene (ethylene) oxide. Background technique [0002] Propylene (ethylene) carbonate is an excellent chemical solvent and is widely used in the field of petrochemical industry. Its production methods mainly include phosgene method, urea alcoholysis method, synthesis method of propylene glycol and carbon dioxide, and synthesis method of carbon dioxide and propylene oxide. The first three methods either use highly toxic raw materials, causing serious harm to the human body and the environment; or the industrialization technology is not yet mature; or the production cost is high and the product quality is not good. The synthesis method of carbon dioxide and propylene (ethylene) oxide is the most widely used industrial production method of propylene (ethylene) carbonate at h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D317/36C07D317/38
CPCC07D317/36C07D317/38Y02P20/141
Inventor 吴剑华
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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