Title:
【発明の名称】結晶化可能な物質を超浄化するための多段分別凍結
Document Type and Number:
Japanese Patent JP2843631
Kind Code:
B2
Abstract:
A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999 percent. Included is controlling the reflux ratio by controlling and/or metering transfers of crystals and mother liquid at selected locations and by maintaining a steady state of transfers between a plurality of stages that carry out similar operations.
Inventors:
GURIFUISU KENESU EFU
Application Number:
JP50970389A
Publication Date:
January 06, 1999
Filing Date:
August 24, 1989
Export Citation:
Assignee:
GURIFUISU KENESU EFU
International Classes:
B01D9/00; B01D9/02; C02F1/22; B01D9/04; (IPC1-7): B01D9/04; C02F1/22
Domestic Patent References:
| JP6470103A | ||||
| JP57105202A | ||||
| JP5520660A | ||||
| JP6095902U |
Attorney, Agent or Firm:
Jun Tsuda (3 others)