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Process for waste treatment of carbonic acid alkylene ester

An alkylene carbonate and treatment process technology, applied in the field of waste catalytic treatment technology, can solve the problems of low environmental benefit and economic benefit, high direct treatment cost and high viscosity, and achieve good waste treatment effect and good technical effect. , the effect of reducing solid waste emissions

Inactive Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of homogeneous catalysts, large amounts of solid or high-viscosity liquid wastes are generated during industrial production, including catalysts, incompletely separated alkylene carbonates, polyols, and other impurities
Due to the high boiling point and high viscosity of this kind of waste, the cost of direct treatment is very high. Usually, they are directly incinerated, buried or treated as low-value crude products, and the environmental protection and economic benefits are very low.

Method used

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  • Process for waste treatment of carbonic acid alkylene ester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The waste enters from the bottom of the tower at 1.000kg / h, wherein the mass fraction of ethylene carbonate is 80%, water enters from the tower at 0.2kg / h, the reaction temperature in the tower is 110°C, and the bottom of the tower is filled with polystyrene Loaded imidazolium salt catalyst, the tower is operated with full reflux. After the reaction, the mixed material is ethylene carbonate 1%, water 4.73%, ethylene glycol 69.40%, and other solid waste 24.88%. The mixed material enters the separation tower R2 after cooling at 0.804kg / h. The temperature in R2 is 60°C and the operating pressure is It is 10kPa, the top of the tower is fully condensed, water is produced at 0.038kg / h, the flow rate of the bottom component is 0.766kg / h and enters the separation tower R3, the temperature in R3 is 110°C, and the component is produced at the top of the tower with a flow rate of 0.547kg / h Ethylene glycol, the components in the bottom of the tower containing 3.65% ethylene carbona...

Embodiment 2

[0023] The waste enters from the bottom of the tower at 1kg / h, wherein the mass fraction of ethylene carbonate is 80%, water enters from the tower at 0.25kg / h, the reaction temperature in the tower is 110°C, and the bottom of the tower is filled with tin-doped zsm-5 molecular sieve, the tower is operated with total reflux. After the reaction, the mixed material is ethylene carbonate 0.94%, water 10.3%, ethylene glycol 65.34%, and other solid waste 23.42%. The mixed material enters the separation tower R2 after cooling at 0.854kg / h. The temperature in R2 is 60°C and the operating pressure It is 10kPa, the top of the tower is fully condensed and fully extracted, the extracted component of 0.088kg / h is unreacted water, the flow rate of the bottom component is 0.766kg / h and enters the separation tower R3, the temperature in R3 is 110°C, the top of the tower The component ethylene glycol is produced at a flow rate of 0.547kg / h, and the components in the bottom of the tower contain ...

Embodiment 3

[0025] The waste enters from the bottom of the tower at 1kg / h, wherein the mass fraction of ethylene carbonate is 90%, water enters from the tower at 0.25kg / h, the reaction temperature in the tower is 110°C, the bottom of the tower is filled with D201, and the tower is Full reflux operation. After the reaction, the mixed material contains 1.12% ethylene carbonate, 8.42% unreacted water, 78.03% ethylene glycol and unreacted waste. After cooling down, it enters the separation tower R2 with a mass flow rate of 0.805kg / h. The temperature in R2 is 60°C and the operating pressure is is 10kPa, the top of the tower is fully condensed, unreacted water is produced at 0.068kg / h, the flow rate of the bottom component is 0.737kg / h and enters the separation tower R3, the temperature in R3 is 110 ° C, the operating pressure is 10kPa, the top of the tower is at The flow rate is 0.547kg / h to extract the component ethylene glycol, and the tower bottom component contains ethylene carbonate 7.5%,...

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Abstract

The invention discloses an efficient waste treatment process. The difficult problem of treatment of waste produced in the production process of carbonic acid alkylene ester is mainly solved. The process is a catalytic conversion treatment process and a coupling separation process of the carbonic acid alkylene ester. The catalytic conversion treatment process adopts a homogeneous or a heterogeneouscatalyst, and the separation process adopts a vacuum separation unit. According to the waste treatment process, the high boiling point waste can be efficiently converted into low boiling point industrial products for rapid separation, the product quality and device operation are stable, and the efficient waste treatment process can be used in the industrial production process.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a high-efficiency catalytic treatment process for waste in the production process of alkylene carbonate. Background technique [0002] Alkylene carbonates such as ethylene carbonate and propylene carbonate are organic chemical raw materials with a wide range of uses and are widely used as solvents and diluents in industry. Alkylene carbonate can be used as a solvent in textiles, printing, polymer synthesis and electrochemistry, as well as raw materials for cosmetics and medicines and intermediates for corresponding diols. Industrially, alkylene carbonate is generally prepared by reacting carbon dioxide and corresponding alkylene oxide under the action of a catalyst. Many catalysts that have been found have catalytic effects on this reaction, such as transition metal complexes, main group element complexes, quaternary ammonium salts, quaternary phosphonium salts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C27/02C07C31/20
CPCC07C29/095C07C31/202C07C31/205
Inventor 戈军伟何文军
Owner CHINA PETROLEUM & CHEM CORP