Process for preparing polyvinyl chloride in 70.5 mcube polymeri reactor

The technology of polyvinyl chloride and polymerization kettle is applied in the field of producing polyvinyl chloride by using a 70.5m3 polymerization kettle, which can solve the problems of high labor intensity of workers, unable to keep up with supporting technologies, and low product quality, etc., so as to reduce labor intensity of workers and save money. Non-productive time, significant economic benefits

Active Publication Date: 2005-08-24
航锦锦西氯碱化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This small kettle and its supporting PVC production method not only hinder the development of PVC economic scale production, but also the auxiliary time and production time are too long, which consumes a large amount of effective production time, resulting in low production intensity of single kett

Method used

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  • Process for preparing polyvinyl chloride in 70.5 mcube polymeri reactor
  • Process for preparing polyvinyl chloride in 70.5 mcube polymeri reactor
  • Process for preparing polyvinyl chloride in 70.5 mcube polymeri reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take SG-5 type polyvinyl chloride as an example:

[0026] In the closed state of the lid of the kettle, it is fixed at 70.5m 3 The corresponding feeding port in the polymerization kettle shall carry out the following procedures in sequence: rinse the polymerization kettle with deionized water, discharge the waste water into the waste water tank at the same time, then perform steam coating on the wall, and then rinse to remove the unadhered anti-sticking kettle agent and arrange them side by side into the waste water tank, add 49kg of buffer with a solid content of 8%, flush the pipeline with 200kg of deionized water into the polymerization kettle; add VCM28.68m 3 and 30.86m of deionized water at a temperature of 87±2°C 3 , the temperature of adding water is based on the fact that after adding VCM and water, the reaction temperature reaches 57°C; adding dispersant PVA-224E is 105kg, and the solid content is 4%, adding dispersant Alcotex72.5 and HPMC is 200.7kg, of which...

Embodiment 2

[0032] Embodiment two is basically the same as embodiment one, except that what is produced is SG-3 type polyvinyl chloride, and its process formula is shown in Table 3:

[0033] Table 3 SG-3 type polyvinyl chloride production process formula

[0034] h 2 O vcm Coating Agent Buffering Agent PVA-224E Alcotex72.5 HPMC EHP TBPP Trigonox99 Chain Transfer Agent Terminating Agent Reaction Temperature

[0035] m 3 m3 m 3 kg kg kg kg kg kg kg kg m 3 ℃

[0036] 31.86 27.68 0.02 3.92 4.2 11.238 1.405 12 4 0.01 52

Embodiment 3

[0038] Embodiment three is basically the same as embodiment one, except that what is produced is SG-7 type polyvinyl chloride, and its process formula is shown in Table 4:

[0039] Table 4 SG-7 type polyvinyl chloride production process formula

[0040] h 2 O vcm Coating Agent Buffering Agent PVA-224E Alcotex72.5 HPMC EHP TBPP Trigonox99 Chain Transfer Agent Terminating Agent Reaction Temperature

[0041] m 3 m 3 m 3 kg kg kg kg kg kg kg kg m 3 ℃

[0042] 30.86 28.68 0.02 3.92 3.8 11.238 1.405 3 9 1 4 0.1 60

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Abstract

A process for preparing polyvinyl chloride in 70.5 cu.m polymer reactor includes such steps as isolating oxygen, flushing inner surface of reactor by water, spraying detackifier by steam, flushing with water, sequentially adding buffering agent, vinyl chloride, hot water, disperser, composite trigger and chain transferring agent, polymerizing for 10 min, adding low-temp water to make reaction temp to be 49-64 deg.C, reacting until the conversion rate reaches 80%, adding stopping agent, terminating reaction, discharging slurry, recovering excessive vniyl chloride, steam stripping, dewatering and drying.

Description

(1) Technical field [0001] The present invention relates to a kind of production method of chemical product, specifically relate to adopting 70.5m 3 A method for producing polyvinyl chloride (PVC) from a polymerization kettle. (2) Background technology [0002] China is a big country of PVC production. In 2002, the output of PVC was 3 million tons, but the per capita consumption was only 2kg / person, only 1 / 20 of the per capita consumption in developed countries. Therefore, the annual import volume of PVC is still about 2 million tons. It can be seen that PVC has great potential for development. But for quite some time, more than 80% of domestic PVC manufacturers have adopted 13.5m 3 or 30m 3 Polymerization kettles limit the development of economical scale production of this product. [0003] The production method is basically as follows: manually spray an open polymerization kettle with anti-sticking agent, and then use deionized water (abbreviated as water) to wash away...

Claims

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Application Information

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IPC IPC(8): C08F2/01C08F114/06
Inventor 薛之化邵平陈淑艳王桂华许志琦李春玉于利民陈德森
Owner 航锦锦西氯碱化工有限公司
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