Patent · US Active

Arrangement and method for producing high-purity crystals

US9095783B2 · kind B2 · utility

0Cited by

11References

21Claims

0Family size

Assignee

HAPILA GmbH · DE

Inventors

Detlef Grawe · Kleinromstedt, DE
Robert Eilers · Jena, DE
Sabine Gliesing · Jena, DE

Key dates

Filing date	Apr 29, 2009
Grant date	Aug 4, 2015
Priority date	—
Expiry date	Nov 13, 2032

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D9/0063
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

An arrangement and a method for producing high-purity crystals, such as temperature-sensitive pharmaceutical agents, in a countercurrent crystallization process. The arrangement comprises a plurality of crystallizers, mother liquor lines, each of which has a shut-off valve, and crystallization product lines, each of which has a shut-off valve, so that a mother liquor flow can be generated which is directed from a crystallizer to the second-next crystallizer in the direction of decreasing purity, and a crystallization product flow can be generated which is directed from a to dissolved crystallization product that is about to crystallize to the next crystallizer in the direction of higher purity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.