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:
Feb. 24, 1981
Filed:
Oct. 17, 1979
Ursus Thummler, Erftstadt, DE;
Hugo Werner, Hurth, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The invention relates to an apparatus for the production of phosphoric acid by subjecting yellow phosphorus to combustion inside a combustion tower, the apparatus comprising a cone-shaped shell with a flat bottom of acidproof material forming the combustion tower, the cone ratio of the shell being 1:10 to 1:12. An upwardly-directed off-gas outlet is secured to the lower portion of the shell and a plurality of downwardly directed spray nozzles is arranged so as to open through the middle portion of the shell into the interior of the combustion tower. An acid-receiving cup with an overflow weir is positioned near the upper end of the shell, the acid-receiving cup surrounding the combustion tower concentrically, being gas-tightly connected to, and supporting, a self-supporting cone-shaped tower cover having a passageway passed centrally through it. The overflow weir is formed of a tubular-annular structure disposed completely horizontally inside the acid-receiving cup. The tower cover forms, with respect to the horizontal, an angle .alpha. of at least 19.degree.. A water-cooled air inlet and a tubular holding means terminating in a phosphorus spray nozzle are hooked concentrically with respect to one another in, and are passed through the passageway in the cover.