Method for making reaction products of phosgene and dihydric phe

Details Method for making reaction products of phosgene and dihydric phe Method for making reaction products of phosgene and dihydric phe

1986-08-04

1987-10-20

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halocarbonate esters

558274, 558280, 558283, 558284, C07C 6800

Patent

active

047015446

ABSTRACT:
A method is provided for making reaction products of phosgene and dihydric phenol, such as bischloroformates and polycarbonates utilizing a reactor with an overhead condenser. Reduced phosgene blow-by is achieved by using an absorber for phosgene which is connected in series to the overhead condenser.

REFERENCES:
patent: 2476637 (1949-07-01), Strain et al.
patent: 2764607 (1956-09-01), Hieserman et al.
patent: 3910983 (1975-10-01), Merkel et al.
Kondratenko et al., Chem Abst., vol. 93, #15000g, (1980).
Caraculescu et al., Chem. Abst., vol. 93, #47751f, (1980).
Block, Chem. Abst., vol. 86, #95131f, (1977).

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