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:
May. 17, 1983
Filed:
Jul. 06, 1981
Bertrams AG, Basel, CH;
Abstract
A method and apparatus for the concentration of an alkaline solution to an approximately anhydrous melt using the falling-film principle under atmospheric pressure wherein the solution to be concentrated is conducted along the internal surface of evaporator tubes (1). Each tube (1) is surrounded by a heating jacket (2). The heating jackets (2) are fed with heat-transfer fluid from a conduit (6) which is common to all jackets. An annular collecting trough (8) is associated with the lower end of each evaporator tube (1). The metal running off from the tube (1) is collected by the trough (8) separately from the vapors. All of the troughs (8) are connected to a melt discharge line (9) which is also common to all troughs. The vapors descending in the tube (1), in contrast thereto, pass through the opening (8a) of the collecting troughs (8) into a collecting duct (10) which is common to all troughs. By the separation of the melt and vapors at the tube end portions, a renewed drop in the alkali concentration is avoided.