A reaction device and process for producing polyethylene oxide

A polyethylene oxide and reaction device technology, which is applied to pressure vessels, chemical instruments and methods, chemical/physical processes used in chemical processes, etc., can solve the problems of insufficient contact of reaction materials, achieve a narrow molecular weight distribution range, eliminate hanging Wall phenomenon, the effect of avoiding clogging of the feed port

Active Publication Date: 2018-02-23
NANJING TECH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a reaction device and its process for producing polyoxyethylene in order to improve the deficiencies of the prior art; to solve the problem that the reaction materials cannot be fully contacted in the production of polyoxyethylene, optimize the reaction device, and improve the quality of the product ; At the same time, solving the technical problem of catalyst reaction and polymerization reaction in the same reaction device can reduce reaction cost and improve production efficiency

Method used

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  • A reaction device and process for producing polyethylene oxide

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Embodiment 1

[0020] Such as figure 1 As shown, the reaction device for the production of polyethylene oxide involved in the present invention is composed of a kettle body 1, a stirrer 2, a motor 6, a nozzle 9, a jacket 10, a bubbling device 15 and a reaction kettle cover 19, wherein the stirrer 2 is set In the center of the kettle body 1, the uppermost end of the agitator 2 is connected to the motor 6 outside the kettle body 1, and the first stirring blade 3 and the second stirring blade are respectively placed on the upper, middle and lower parts of the agitator 2 inside the kettle body 1. 4 and the third stirring blade 5; every group of stirring blades is 6 pieces, trapezoidal, with a diameter of 20cm, and an angle of 20° with the vertical surface, and the wall scraper 12 is connected on the second stirring blade 4 by a spring 13, scraping The wall device 12 is closely attached to the inner wall of the kettle body 1, and two scrapers are arranged on the wall scraper 12; the nozzle 9 is a...

Embodiment 2

[0022]The reaction device of this embodiment is as embodiment 1: open reactor cover 19, add solid calcium, cover reactor cover 19 and seal, the reaction device is carried out vacuumize operation, vacuum time is 10min, and vacuum degree is 0.02MPa, The cooling medium ethanol is passed into the coil 11, the temperature in the kettle body 1 is reduced to -60°C, and the liquid ammonia is passed through the feed port 8, and the nozzle 9 can spray the liquid ammonia evenly on the calcium surface for reaction, and the motor 6 drives the agitator 2, and the agitating blades can fully stir the materials, wherein each group of agitating blades is 6 pieces, trapezoidal, 20 cm in diameter, and 20° with the vertical surface, and the wall scraper 12 is provided with 2 scrapers, 20 holes are set on the nozzle 9, the diameter of the holes is 2.0mm, the angle between each hole and the vertical direction is 30°, the mass ratio of liquid ammonia to calcium is 20:1, and the reaction time is 5h , ...

Embodiment 3

[0024] The reaction device of this embodiment is as embodiment 1: open reaction kettle cover 19, add solid calcium, cover reaction kettle cover 19 and seal, the reaction device is carried out vacuumize operation, vacuum time is 20min, and vacuum degree is 0MPa, in The cooling medium ethylene glycol is passed into the coil 11, the temperature in the kettle body 1 is lowered to -40°C, and the liquid ammonia is passed through the feed port 8, and the nozzle 9 can spray the liquid ammonia evenly on the calcium surface for reaction. The motor 6 drives the stirrer 2, and the stirring blades can fully stir the materials, wherein, each group of stirring blades is 8 pieces, trapezoidal, 30 cm in diameter, and 50° with the vertical surface, and the wall scraper 12 is set There are 6 scrapers, 60 holes are arranged on the nozzle 9, the diameter of the holes is 0.5mm, the angle between each hole and the vertical direction is 50°, the mass ratio of liquid ammonia to calcium is 40:1, and the...

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Abstract

The invention relates to a reaction device for producing polyoxyethylene and a process thereof, comprising a kettle body (1), a stirrer (2), a motor (6), a nozzle (9), a jacket (10), and a bubbling device (15) and reaction kettle cover (19) are formed; The reactor body is covered with a reaction kettle cover, and a flat coil pipe (11) is provided on the outer wall of the kettle body, and a jacket is arranged outside the kettle body; the stirrer (2) is placed in the kettle body (1) central shaft; the agitator is provided with a stirring blade; the second agitating blade (4) is connected with the scraper (12) through a spring (13); the nozzle (9) is welded on the agitating shaft of the agitator; the kettle body The inner wall of the bottom end is provided with a bubbling device (15); the process of producing polyethylene oxide by using the device of the present invention includes preparation of catalyst, modification of catalyst, aging of catalyst and preparation of polyethylene oxide. The invention has the following advantages: the materials can be fully contacted, the molecular weight distribution range of the polyethylene oxide product is narrower, and the quality of the polyethylene oxide product is improved; the catalytic reaction and the polymerization reaction in the production of polyethylene oxide are realized in the same reaction device It can greatly improve the heat transfer rate and production efficiency.

Description

technical field [0001] The invention relates to a reaction device and a polymer preparation process using the device, in particular to a reaction device for producing polyethylene oxide and a process thereof. Background technique [0002] Polyethylene oxide is formed by ring-opening polymerization of ethylene oxide under the action of a catalyst. Generally, products with a molecular weight of less than 20,000 are called polyethylene glycol (PEG), which is liquid or waxy solid; those with a molecular weight greater than 20,000 The product is called Polyethylene Oxide (PEO) and is a powdery flowable solid. Polyethylene oxide is widely used in the fields of pharmaceuticals, papermaking, and daily chemicals. At present, most of the mature industrial production technologies are owned by foreign countries. my country started relatively late, and currently there are few manufacturers that have realized industrial production. [0003] The catalyst used in the polymerization reactio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J3/04B01J8/10C08G65/10
Inventor 肖勇王磊吴仁荣管国锋高正松万辉
Owner NANJING TECH UNIV
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