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:
Sep. 06, 1977
Filed:
May. 13, 1976
Shogo Tsunoda, Yokohama, JA;
Katsuyuki Kataoka, Yokohama, JA;
Ebara Infilco Kabushiki Kaisha, Tokyo, JA;
Abstract
A solid-liquid separation process is provided for clarifying water containing colloidally-suspended solids such as clay, metal minerals and hydroxides, organic and inorganic materials and like substances wherein the solids concentration in the mother liquor is less than 10 g/l. The colloidally-suspended solids are converted to a coagulum of substantially spherical particles characterized by a high density and large particle size and generally exhibit different properties than the flocs thereof. The coagulum separates from a supernatant at about 5 to about 10 times the precipitation rate of a floc treated according to a conventional flocculation-precipitation method. The resulting sludge exhibits superior condensability and is extremely suitable for treatment by a hydroextraction technique. The water obtained from the treatment is unusually clear and free of suspended matter. Apparatus for carrying out said process is described, said apparatus including stirrers for introducing shear energy within specified critical limits.