Patent · US Expired

Freeze-drying apparatus

US6931754B2 · kind B2 · utility

7Cited by

7References

16Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Bernd Sennhenn · Leverkusen, DE
Dietrich Gehrmann · Leverkusen, DE
Ariane Firus · Pulheim, DE

Key dates

Filing date	Apr 10, 2003
Grant date	Aug 23, 2005
Priority date	—
Expiry date	May 23, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF26B5/06
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A drying unit for removing solvent from moist material, and a method for drying moist material with the drying unit. The unit comprises at least one drying chamber (23) having at least one stand plate (2) for holding vessels (3), which are filled with moist material, or flat layers of moist material, the drying chamber (23) being connected to a condenser (22) via a vapor passage (15), in which sublimed solvent can be separated out, the stand plates (2) being connected to a temperature-controlled heating/cooling circuit, the chamber (23) having heating/cooling plates (4) or (4′) which are connected to a second heat-transfer circuit, wherein the heating/cooling plates (4) or (4′) are substantially thermally isolated from the chamber wall (6).

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