Continuous preparation of polycaprolactam in vertical tubular re

Details Continuous preparation of polycaprolactam in vertical tubular re Continuous preparation of polycaprolactam in vertical tubular re

1980-04-24

1982-10-12

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

526 65, C08G 6916

Patent

active

043540201

ABSTRACT:
A process for the continuous preparation of polycaprolactam, which comprises polymerizing .epsilon.-caprolactam in a vertical tubular reactor through which the .epsilon.-caprolactam flows downward, wherein the .epsilon.-caprolactam is partially polymerized, at a nylon-forming temperature, in a mechanically mixed zone, the reaction mixture is circulated through a heat exchange zone in the lower part of the mechanically mixed reaction zone, and is polymerized further, in additional heat exchange zones, until the desired degree of polymerization is reached, and poly-.epsilon.-caprolactam is then discharged as a melt, and an apparatus for carrying out the process.

REFERENCES:
patent: 2562796 (1951-07-01), Koch
patent: 3451976 (1969-06-01), Lucas
patent: 3565866 (1971-02-01), Guenther
patent: 3813366 (1974-05-01), Wright et al.
patent: 4204049 (1980-05-01), Matthies et al.

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