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:
Mar. 10, 1992
Filed:
Nov. 01, 1990
Jeremy Ko, Boston, MA (US);
Steven H Levis, Haverhill, MA (US);
Morton International, Inc., Chicago, IL (US);
Abstract
An improved high yield process and apparatus for producing sodium hydrosulfite by reacting sodium borohydride, sulfur dioxide, sodium hydroxide, and sodium bisulfite is provided. The improved result of the invention is obtained by a feed system that requires the introduction of a first mixture comprising sodium borohydride, sodium hydroxide, and water into a flow stream prior to the introduction of a second mixture comprising water and sulfur dioxide. The improved result can be further enhanced by techniques of intimately mixing the first mixture and the flow stream as well as intimate mixing the second mixture and the flow stream.