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Polymerization device in production process of polyethylene oxide products

A technology of polyethylene oxide and polymerization equipment, which is applied in the direction of chemical/physical/physical chemical fixed reactors, etc., can solve the problems of polymerization equipment amplification, unevenness, implosion particle size and molecular weight, etc., and achieve the effect of avoiding local implosion

Active Publication Date: 2015-12-09
吉化集团吉林市星云化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the production of polyethylene oxide products, due to the restrictions on the internal structure and design of the polymerization kettle equipment due to the high molecular weight, high-quality performance of the product and the characteristics of extremely explosive polymerization of the reactants, the volume of the polymerization kettle is usually designed at 2000 liters Below, more than 2000 liters, it is very easy to produce local detonation or produce a large number of products with uneven particle size and molecular weight in the production process, which seriously affects the production control ability of the product and the quality of the product, resulting in the failure of successful amplification of the polymerization equipment.

Method used

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  • Polymerization device in production process of polyethylene oxide products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 (Production of 100,000 molecular weight products):

[0018] 1. After the speed of the stirring device 2 in the main body 1 of the polymerizer is set to 130 revolutions per minute, open the solvent feed valve on the solvent inlet 6-2, and drive 3m into the main body 1 of the polymerizer 3 Solvent, when the liquid level of the main body 1 of the polymerizer reaches 3m 3 When, close the solvent feed valve.

[0019] 2. Turn on the catalyst feeding device 3, and add the metered catalyst into the main body 1 of the polymerization vessel through the catalyst inlet 6-1; at the same time, turn on the shear 4.

[0020] 3. Open the cooling device 5 on the main body 1 of the polymerizer, make the cooling water circulate through the chilled water inlet 18 and chilled water outlet 13 on the cooling pipe 21, and turn on the ethylene oxide feed on the ethylene oxide inlet 6-3 The valve is used to feed ethylene oxide into the main body 1 of the polymerizer. During the reaction, the ...

Embodiment 2

[0023] Example 2 (Production of 3 million molecular weight products):

[0024] 1. After the rotation speed of the stirring device 2 in the main body 1 of the polymerizer is set to 90 rpm, open the solvent feed valve on the solvent inlet 6-2, and drive 3m into the main body 1 of the polymerizer 3 Solvent, when the liquid level in the main body 1 of the polymerizer reaches 3m 3 When, close the solvent feed valve.

[0025] 2. Turn on the catalyst feeding device 3, and add the metered catalyst into the main body 1 of the polymerization vessel through the catalyst inlet 6-1; at the same time, turn on the shear 4.

[0026] 3. Open the cooling device 5 on the main body 1 of the polymerizer, make the cooling water circulate through the chilled water inlet 18 and chilled water outlet 13 on the cooling pipe 21, and turn on the ethylene oxide feed on the ethylene oxide inlet 6-3 Valve to pass ethylene oxide into the polymerization vessel. During the reaction process, the reaction temperature...

Embodiment 3

[0029] Example 3 (Production of 8 million molecular weight products):

[0030] 1. After setting the stirring speed of the polymerization kettle to 50 rpm, open the solvent feed valve and drive 2.5m into the polymerization kettle 3 Solvent, when the liquid level in the kettle reaches 2.5m 3 When, close the solvent feed valve.

[0031] 2. Turn on the catalyst feeding device 3, and add the metered catalyst into the main body 1 of the polymerization vessel through the catalyst inlet 6-1; at the same time, turn on the shear 4.

[0032] 3. Open the cooling device 5 on the main body 1 of the polymerizer, make the cooling water circulate through the chilled water inlet 18 and chilled water outlet 13 on the cooling pipe 21, and turn on the ethylene oxide feed on the ethylene oxide inlet 6-3 Valve to pass ethylene oxide into the polymerization vessel. During the reaction process, the reaction temperature is controlled to be 30-55°C, the pressure is controlled to be 0.3-0.6 MPa, the feeding am...

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Abstract

The invention belongs to the polyethylene oxide product production field, and particularly relates to a polymerization device in a production process of polyethylene oxide products; the polymerization device includes a polymerization kettle main body, a stirring device, a catalyst loading device, a shearing machine and a cooling device; the inner wall of the polymerization kettle main body is provided with at least four baffle plates along the circumference in a uniform distribution manner; the stirring device is arranged at a longitudinal central position of the interior of the polymerization kettle main body and adopts a three-layer push type stirring structure, wherein the length of first-layer stirring blades and second-layer stirring blades is 450 mm, and the length of third-layer stirring blades is 550 mm. Through special design of the baffle plates and the stirring device in the polymerization device, and through reasonable installation and use of the shearing machine, a phenomenon of local implosion generated by the reaction is avoided, so that the volume of the polymerization device is successfully amplified to 6000 L, and the production scale of the products is improved.

Description

technical field [0001] The invention belongs to the production field of polyethylene oxide products, in particular to a polymerization equipment in the production process of polyethylene oxide products. Background technique [0002] Polyethylene oxide, referred to as PEO, is obtained by ring-opening polymerization of ethylene oxide (also known as ethylene oxide). It is an important water-soluble polymer material with a wide range of applications, including papermaking, electrical appliances, construction, mining, medicine, agriculture, textiles, printing, oil exploration, municipal engineering, washing and personal care products, etc. The brief description of its production principle is: Ethylene oxide undergoes ring-opening polymerization through the action of a catalyst in a solvent such as C6 or C7, and undergoes an exothermic reaction at a certain temperature and pressure. Through the growth of the polymer chain, the requirements of the product molecular weight and othe...

Claims

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Application Information

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IPC IPC(8): B01J19/18C08G65/08
Inventor 于广臣
Owner 吉化集团吉林市星云化工有限公司