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:
Oct. 12, 1999
Filed:
Jul. 16, 1997
Gunter Roller, Bad Homburg, DE;
Dieter Stein, Wiesbaden, DE;
Ulrich Wagner, Bernburg, DE;
Ludwig Englmaier, Trostberg, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
A solution to be evaporated is passed through one or several evaporation stages. In each evaporation stage, the solution is circulated between a heat exchanger and an evaporating vessel, and steam is withdrawn from the evaporating vessel. For removing crusts, the evaporation in the respective evaporation stage is interrupted, and a cleaning suspension containing at least 3 wt % granular solids is circulated through the heat exchanger and the evaporating vessel. The solids, which have an abrasive effect, remove the crusts. Preferably, the solution to be evaporated is circulated through the evaporation stage for removing the crusts, where the heat exchanger is heated and the cleaning solution is evaporated to such an extent that solids crystallize out and a cleaning suspension is formed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile