Distillation: processes – separatory – Addition of material to distilland to inhibit or prevent... – For inhibiting or preventing a polymerization reaction
Reexamination Certificate
2005-04-12
2005-04-12
Manoharan, Virginia (Department: 1764)
Distillation: processes, separatory
Addition of material to distilland to inhibit or prevent...
For inhibiting or preventing a polymerization reaction
C203S091000, C203S100000, C203SDIG001, C203SDIG002, C560S218000, C562S600000
Reexamination Certificate
active
06878239
ABSTRACT:
A process for inhibiting a polymerization of an easily polymerizable compound purification system is disclosed.According to the present invention, the polymerization of the easily polymerizable compound such as (meth)acrylic acid and (meth)acrylate flowed into a vacuum section can be inhibited by contacting a liquid containing a polymerization inhibitor with the compound directly in the vacuum section.When the vacuum section includes a gas and liquid contact chamber (usually a condenser), the liquid containing a polymerization inhibitor may be supplied to the chamber. When the vacuum section includes a liquid ejector and/or a nash pump as a vacuuming device, the liquid containing a polymerization inhibitor may be circulated by the liquid ejector and/or the nash pump for reducing a pressure of a purifying section. Examples of easily polymerizable compounds are (meth)acrylic acid and (meth)acrylates. The process of the invention is capable of inhibiting the polymerization of the easily polymerizable compound such as (meth)acrylic acid and (meth)acrylate in a vacuum section of a purifying system. The system of the invention is suitable for purifying the easily polymerizable compound.
REFERENCES:
patent: 3674651 (1972-07-01), Otsuki et al.
patent: 3951756 (1976-04-01), Dirks et al.
patent: 4113574 (1978-09-01), Schumacher et al.
patent: 4182658 (1980-01-01), Watson
patent: 4210493 (1980-07-01), Stewart et al.
patent: 4301298 (1981-11-01), Horlenko et al.
patent: 4369097 (1983-01-01), Nezu et al.
patent: 5159106 (1992-10-01), Ritter et al.
patent: 5207874 (1993-05-01), Hess et al.
patent: 5770021 (1998-06-01), Hego et al.
patent: 5855743 (1999-01-01), Herbst et al.
patent: 6398918 (2002-06-01), Popov
patent: 6436245 (2002-08-01), Nishimura et al.
patent: 6525216 (2003-02-01), Nishimura et al.
patent: 6596129 (2003-07-01), Yoneda et al.
patent: 10-204030 (1998-08-01), None
patent: 9835736 (1998-08-01), None
Database WPI, Section Ch, Week 8311, Derwent Publications Ltd., London, Great Britain, An 1983-26134k, XP002239392, Abstract of JP 58 019393 A, Feb. 4, 1983.
Matsumoto Yukihiro
Nishimura Takeshi
Manoharan Virginia
Nippon Shokubai Co. , Ltd.
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