Patent · US Expired

Distillation and sublimation apparatus comprising a condenser

US4407488A · kind A · utility

9Cited by

2References

5Claims

0Family size

Assignee

Leybold-Heraeus GmbH · DE

Inventors

Erwin Wanetzky · Großkrotzenburg, DE
Franz Hugo · Aschaffenburg, DE
Fernand Kuhlmann · Cologne, DE

Key dates

Filing date	Oct 29, 1982
Grant date	Oct 4, 1983
Priority date	—
Expiry date	Oct 29, 2002

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D7/00
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a distillation and sublimation apparatus having a receiving vessel and a number of containers for the starting product. Each container has a bottom, an outer wall and an inner wall with a vapor duct, and the containers are stacked one upon the other in such manner that the vapor ducts are arranged in series. An annular space is present outside the stack of containers. The apparatus comprises a condenser into which the vapor duct of the bottom container discharges. For the purpose of solving the problem of preventing condensation of vapor on the receiving vessel, it is proposed, in accordance with the invention, that capillary gaps (28), which are open towards the receiving vessel (3), be present between the containers (26). Furthermore, the condenser (8) communicates with the annular space (10) by way of at least one return-flow orifice (19) for the gases. The arrangement is such that the annular space (10), the capillary gaps (28), the vapor ducts (26), the condenser (8) and the return-flow orifice or orifices (19) are parts of a closed gas-circulation path.

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