Production device for preparing epoxypropane through propylene chlorohydrination and use method of production device

A technology for the production of propylene oxide and production equipment, which is applied in the field of production equipment for propylene oxide by the chlorohydrin method, which can solve the problems of not meeting the requirements of environmental protection, serious corrosion of equipment, difficult disposal of waste water and waste residue, etc., and achieve energy saving and raw material utilization High efficiency, easy operation and control

Inactive Publication Date: 2017-06-27
吴剑华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process technology of producing propylene oxide by chlorohydrin method was introduced about 50 years ago. The process equipment is seriously corroded, and the waste water and waste residue produced are not easy to handle, which does not meet the current environmental protection requirements. This has become a restriction for the development of propylene oxide production by chlorohydrin method. primary factor

Method used

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  • Production device for preparing epoxypropane through propylene chlorohydrination and use method of production device
  • Production device for preparing epoxypropane through propylene chlorohydrination and use method of production device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The device used in embodiment 1 comprises: hypochlorous acid reactor 1, gas-liquid-solid three-phase separator 2, chloroalcoholization reactor 3, gas-liquid separator 4, saponification reactor 5, saponification separation tower 6, liquid-liquid separator 7. Connecting pipelines and intermediate tanks between equipment, gas conveying devices, liquid conveying devices, control and display instruments and accessories. Wherein the hypochlorous acid reactor 1, the chloroalcoholization reactor 3, and the saponification reactor 5 are tubular reactors composed of straight pipes and curved pipes, and chemical fillers are arranged in the straight pipe part; the liquid-liquid separator 7 is provided with 4 in the vertical cylinder. A continuous settling separator with a spiral coil. The hypochlorous acid reactor 1 is provided with chlorine gas, water and calcium carbonate inlet pipelines, the outlet of the hypochlorous acid reactor 1 is connected with the inlet of the gas-liquid-s...

Embodiment 2

[0036] Embodiment 2 is substantially the same as Example 1, except that the straight pipe part of the hypochlorous acid reactor 1 used, the chloroalcoholization reactor 3, and the saponification reactor 5 is a commercially available static mixer, and the saponification agent used is hydrogen sodium oxide.

Embodiment 3

[0038] Embodiment 3 is basically the same as Embodiment 1, except that a part of the saponification wastewater is discharged from the system, and a part is returned to the hypochlorous acid reactor 1 .

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Abstract

The invention discloses a production device for preparing epoxypropane through propylene chlorohydrination and a use method of the production device, and relates to a chemical production device and a use method of the production device. The device is provided with a hypochlorous acid reactor, so that no direct gas phase contact between chlorine and propylene is generated; furthermore, hydrogen chloride removal is performed through calcium carbonate before chlorohydrination; and in the chlorohydrination reaction process, generated chloropropanol is not in contact with hydrogen chloride. The device avoids conditions that byproducts may be produced in the propylene chlorohydrination reaction process; the raw material utilization rate is high, and the quantity of target products is large; a tubular reactor is adopted for saponification, and only epoxypropane is evaporated from the tower top of a saponification separation tower; and a liquid-liquid separator for removing sediments from tower bottoms of the saponification separation tower separates saponification wastewater from a small amount of dichloroethane and dichlorodiisopropyl ether, so that the energy consumption in a saponification separation process can be obviously reduced. The device occupies a small area, is small in investment, high in operation flexibility and easy to operate and control, and can be used for building a new chlorohydrination-based epoxypropane production device and transforming the existing chlorohydrination-based epoxypropane production device.

Description

[0001] Technical field: [0002] The invention relates to a chemical production device and its use method, in particular to a chlorohydrin method propylene oxide production device and its use method. [0003] Background technique: [0004] Propylene oxide is an important propylene derivative, mainly used in the production of polyether polyols, propylene glycol and various nonionic surfactants, etc., and has a wide range of uses. The production of propylene oxide in my country mainly adopts the chlorohydrin process, and the production equipment is mainly based on imported technology, including the technology of Asahi Glass Company of Japan, the technology of Mitsui East Asia Company of Japan, the technology of Showa Denko Company of Japan and the technology of Dow Chemical Company of the United States. The process technology of producing propylene oxide by chlorohydrin method was introduced about 50 years ago. The process equipment is seriously corroded, and the waste water an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/28C07D303/04
CPCC07D301/28C07D303/04
Inventor 吴剑华
Owner 吴剑华
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