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:
Dec. 07, 1982
Filed:
Nov. 06, 1980
Junzaburo Seino, Osaka, JP;
Hiroshi Ikeda, Nara, JP;
Washohati Abo, Osaka, JP;
Iwao Minami, Osaka, JP;
Joji Fuji, Aomori, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A method for producing dyestuff powders by spray drying a dye dispersion or solution characterized in that the spray drying is effected using a spray dryer comprising a drying room with an inlet for the introduction of hot air into the drying room and an outlet for the discharge of hot air with dyestuff powders from the drying room, an atomizer for spraying the dye dispersion or solution therethrough positioned at the upper part of the drying room and an accelerating means for increasing the velocity of the hot air. The production parameters are controlled so that the temperature at the inlet is between 110.degree. and 260.degree. C., the temperature at the outlet is between 60.degree. and 80.degree. C. and the velocity of hot air at the position just under or around the atomizer is between 5 and 80 m/sec.