Invention Grant
- Patent Title: Process for the purification of polyethers using a tubular coil evaporator
- Patent Title (中): 使用管状线圈蒸发器来净化聚醚的方法
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Application No.: US900539Application Date: 1978-04-27
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Publication No.: US4143072APublication Date: 1979-03-06
- Inventor: Hartmut Hetzel , Pramod Gupta , Hans-Joachim Sandhagen
- Applicant: Hartmut Hetzel , Pramod Gupta , Hans-Joachim Sandhagen
- Applicant Address: DEX Leverkusen
- Assignee: Bayer Aktiengesellschaft
- Current Assignee: Bayer Aktiengesellschaft
- Current Assignee Address: DEX Leverkusen
- Priority: DEX2755089 19771210
- Main IPC: C08G65/00
- IPC: C08G65/00 ; C08G65/02 ; C08G65/30
Abstract:
This invention relates to a process for the removal of troublesome secondary products, particularly small quantities of water, solvents, low molecular weight glycols, and pungent-smelling substances, from polyethers by means of a tubular coil evaporator.
Public/Granted literature
- US5871269A Protective device with E.L. light means Public/Granted day:1999-02-16
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