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:
Jan. 12, 1988
Filed:
Oct. 07, 1985
Paul T Hahm, Hilton, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A novel process and apparatus for multistage contacting of two materials advantageously provides high chemical efficiency and low losses of components of one of the materials caused by that material being carried out of the process with the other material. The process comprises contacting, in a series of stages, a first material with a second material containing a component whose concentration therein is reduced by such contact. Replenishment material is introduced to at least one of the stages to compensate for such concentration reduction. The concentration of the component in the second material is highest in one of the stages, and the first material carries a part of the second material out of each stage. The first material is contacted with the second material at least one once in each stage of the series. Contacting is done in a sequential manner such that, in respect to the first material, contacting occurs in at least one of the stages other than the stage having highest component concentration, then in the stage having highest component concentration, and then in at least one of the stages other than the stage having highest component concentration. Replenishment material is introduced to the stage having highest compnent concentration. Second material is transferred from the stage having highest component concentration to at least one of the other stages.