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:
Apr. 19, 2005
Filed:
Oct. 22, 2002
Hartwig Schlesiger, Fallingbostel, DE;
Martin Morning, Zschepplin, DE;
Gerd Sonnenberg, Walsrode, DE;
Rudolf Heidemann, Walsrode, DE;
Hartwig Schlesiger, Fallingbostel, DE;
Martin Morning, Zschepplin, DE;
Gerd Sonnenberg, Walsrode, DE;
Rudolf Heidemann, Walsrode, DE;
Wolff Walsrode AG, Walsrode, DE;
Abstract
A process of both milling and drying a solvent-moist material (e.g., water-moist methylhydroxyethylcellulose) is described. The process includes, (a) providing a mill-dryer () which includes, in series, a heat exchanger (), a mill () and a particulate separating apparatus () connected by conduits (), () and (), which together define a mill-dryer circuit (). The mill-dryer () also includes a bypass conduit (), which provides optionally at least partial gaseous bypass of the heat exchanger (). The process further includes: (b) introducing the solvent-moist material into the mill (); (c) circulating a vapor stream (e.g., a steam/air stream) throughout the mill-dryer circuit (); (d) heating the vapor stream by means of passage through the heat-exchanger (); (e) forwarding milled particulate material from the mill () to the particulate separating apparatus () by means of conduit (); (f) separating the particulate material from the vapor stream in the particulate separating apparatus (); (g) forwarding the vapor stream from the particulate separating apparatus () through conduits (); and (h) controlling the temperature of the vapor stream by optionally forwarding at least some of the vapor stream through the bypass line ().