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Title:
METHOD OF RECOVERING LOW-BOILING SUBSTANCES FROM A POLYMER LATEX
Document Type and Number:
WIPO Patent Application WO/1997/036940
Kind Code:
A1
Abstract:
A method of recovering low-boiling substances by spraying a polymer latex containing low-boiling substances from a nozzle at an upper part of a vaporization drum and vaporizing the low-boiling substances, wherein the polymer latex is sprayed in a first vaporization drum under a pressure of 50 to 130 Torr onto the whole liquid surface of the polymer latex stored in the vaporization drum, and the polymer latex heated at temperatures higher by 10 to 30 �C than the saturated water vapor temperatures in the vaporization drums is sprayed in a second vaporization drum under a pressure of 100 to 240 Torr higher than that of the first vaporization drum. This makes it possible to highly efficiently recover low-boiling substances such as unreacted monomers from the polymer latex.

Inventors:
TAKEYAMA YOUICHI (JP)
YOSHIDA MASAHIRO (JP)
Application Number:
PCT/JP1997/001086
Publication Date:
October 09, 1997
Filing Date:
March 28, 1997
Export Citation:
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Assignee:
SHINDAI ICHI VINYL CORP (JP)
TAKEYAMA YOUICHI (JP)
YOSHIDA MASAHIRO (JP)
International Classes:
B01D1/16; B01D3/06; C08F14/06; B01D3/42; B01D19/02; C08F6/00; C08F6/06; C08F6/10; C08F6/14; C08F14/00; (IPC1-7): C08F6/14; B01D1/16
Foreign References:
JPH08325321A1996-12-10
Other References:
See also references of EP 0890582A4
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