System for freeze granulation

Details System for freeze granulation System for freeze granulation

Filed on

1998-01-06

Date issued

1999-10-12

Examiner

Capossela, Ronald

Patent Class

Refrigeration

SubClass

Liquid contacting discrete commodity

Other Related Categories

62 461, 62 541, 62384, F25D 702

Type

Patent

Status

active

Patent number

059641002

Description

ABSTRACT:
The present invention is a system and method for freeze granulation of a medium such as a biopharmeceutical product. The medium is put into a chamber and mixed using a pair of counter rotating agitators. The agitators have angled blades or paddles on them in order to induce motion in the medium parallel to the axis of the agitator shafts. A set of liquid nitrogen and liquid carbon dioxide nozzles are attached to the chamber. The liquid nitrogen nozzles spray a mist of liquid nitrogen into the medium. The liquid carbon dioxide nozzles spray carbon dioxide snow into the chamber. The liquid nitrogen and the carbon dioxide can be sprayed into the chamber at the same time or alternately.

REFERENCES:
patent: 3393152 (1968-07-01), Smith et al.
patent: 3416977 (1968-12-01), Rein
patent: 4187689 (1980-02-01), Selcukoglu et al.
patent: 5135553 (1992-08-01), Rebhan
patent: 5154062 (1992-10-01), Gaumer, Jr. et al.
patent: 5368105 (1994-11-01), Chaiken et al.

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