Patent · US Expired

System for cleaning objects

US5174315A · kind A · utility

11Cited by

6References

9Claims

0Family size

Assignee

Durr GmbH · DE

Inventors

Rudiger K. Hellstern · Stuttgart, DE
Peter Hosel · Munich, DE
Arwed Eberle · Reutlingen, DE
Ulrich Lachenmayer · Uhingen, DE
Herbert B. Kohler · Uniontown, US

Key dates

Filing date	Apr 12, 1991
Grant date	Dec 29, 1992
Priority date	—
Expiry date	Apr 12, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23G1/36
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Method for cleaning objects with the aid of an aqueous cleaning fluid containing a washing agent, in which the objects are rinsed with an aqueous rinsing fluid after treatment with the cleaning fluid and wherein, to avoid any components having a low boiling point being returned to the cleaning and rinsing fluid as well as to avoid any loss in washing agents, the cleaning fluid is first subjected to membrane filtration, the permeate hereby recovered and containing washing agents is distilled, the concentrate resulting therefrom and containing washing agents is added to the cleaning fluid used in the cleaning process and the distillate is supplied to the rinsing process.

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