The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 02, 1995
Filed:
Aug. 04, 1994
Klaus Pollmann, D-84489 Burghausen, DE;
Jorg Von Eysmondt, D-65719 Hofheim am Taunus, DE;
Other;
Abstract
In the described process, the used aircraft deicing fluid is subjected first to a conventional filtration to remove undissolved substances and subsequently to an ultrafiltration to remove, in particular, the polymeric thickeners. The permeate from the ultrafiltration is then treated with ion exchangers, and the resulting eluate, essentially composed of glycol and water, is subsequently distilled to remove water and thus the glycol content is brought to the required value. The glycol/water solution obtained in this way can be used to prepare a new aircraft deicing composition by mixing the other components required in the glycol/water solution.