C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/243
C08G 69/28 (2006.01) C08G 69/16 (2006.01)
Patent
CA 1096544
ABSTRACT A process for preventing deposits when venting steam containing entrained polymer from high pressure reactors used for preparing nylon from dicarboxylic acid and diamine. The hot steam generated during condensation polymerization of the reactants is vented through a pressure-control valve at a rate which maintains a desired pressure in the rector. De- posit of polymer in the valve or vent pipe after release of pressure is prevented by injecting water into the low pressure side of the valve or into the subsequent vent pipe. At least sufficient water is used to saturate the vented steam and to wet the walls of the vent pipe.
274614
Jaeger Joseph
Sauerbrunn Robert D.
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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