Polyarylene sulfide production method and apparatus for continuous production of polyarylene sulfide
US10703861B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Feb 5, 2018 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | Feb 5, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/0254
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for producing polyarylene sulfide of the present invention includes the steps of: supplying reaction raw materials to at least one of a plurality of reaction vessels mutually communicated through a gas phase; carrying out a polymerization reaction; and removing at least some of the water present in the reaction vessels. Each of the steps is carried out in parallel, and a reaction mixture is transferred sequentially between the reaction vessels. At that time, the amount of heat that is removed in the polymerization reaction is less than the amount of reaction heat of the polymerization reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.