Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1994-05-05
1995-08-08
Seidleck, James J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
549230, 549229, 549233, 549518, C08G 6400
Patent
active
054400040
ABSTRACT:
A method for the production of an alkylene carbonate at high yields and high selectivity by a reaction between an alkylene glycol and urea, the method being capable to preventing the deposition of a white crystal in the reflux condenser used in a conventional method for the production of alkylene carbonate and the subsequent decrease in the yield, wherein:
a gas washing member and a cooling member are disposed above a reaction portion where alkylene glycol and urea are allowed to react,
ammonia-containing steam exhausted from the reaction portion is downwardly introduced into the cooling member through the gas washing member,
condensate and ammonia gas exhausted from a bottom of the cooling member are gas-liquid separated,
the condensate is introduced into the gas washing member, and
the ammonia gas is removed from the reaction system.
REFERENCES:
patent: 5003084 (1991-03-01), Su et al.
Doya Masaharu
Kanbara Yutaka
Kimizuka Ken-ichi
Okawa Takashi
Mitsubishi Gas Chemical Company Inc.
Mosley Terressa
Seidleck James J.
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