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:
Nov. 15, 1983
Filed:
Feb. 11, 1982
Ake L Melin, Oskarshamn, SE;
SAB Nife AB, Landskrona, SE;
Abstract
The invention relates to a method of recovering nickel from a spent fat hardening catalyst which consists of finely divided nickel metal on a carrier for example of infusorial earth and/or synthetic material and suspended in fat. The fat is saponified by means of an alkali solution to form a dissolved soap composition which is separated from the nickel metal and the carrier. The nickel metal is then leached out from the carrier and recovered in the form of nickel sulphate. Soap can be salted out of the dissolved soap composition and be used for cleaning purposes in industry, and the carrier can be washed and re-used. During the recovery waste solutions from the alkaline accumulator industry may appropriately be used so that only sulphuric acid is needed as a process chemical. The nickel sulphate solution recovered can be used, for example, as a raw material for the production of active nickel hydroxide mass for alkaline accumulators.