Production of CO.sub.2 pellets

Details Production of CO.sub.2 pellets Production of CO.sub.2 pellets

1990-06-27

1992-08-04

Capossela, Ronald C.

Refrigeration

Processes

Circulating external gas

62461, B29C 4300

Patent

active

051355531

ABSTRACT:
During the production of solid CO.sub.2 pellets by compressing CO.sub.2 snow, in order to reduce the sublimation of the CO.sub.2 snow in the compressing step, the CO.sub.2 snow is subcooled with a cryomedium, e.g., argon or nitrogen. The compression mold may be separately cooled and the CO.sub.2 snow may be subcooled with liquid cryomedium while in a storage vessel and/or sprayed with liquid cryomedium while on a conveyor leading to the press.

REFERENCES:
patent: 2016815 (1935-10-01), Gilmore
patent: 3124442 (1964-03-01), Rich
patent: 3393152 (1968-07-01), Smith et al.
patent: 3443389 (1969-05-01), Townsend et al.
patent: 3817045 (1974-06-01), Muska
patent: 4597266 (1986-07-01), Entrekin
Chemical Abstracts, Band 92, Nr.12, 24. Mar. 1980, Seite 118, Zusammenfassung Nr. 96303z, . . . JP-A-79 112 795 (Japan Oxygen Co., Ltd.).

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