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:
Sep. 14, 1976
Filed:
Jul. 07, 1975
Steve R Thompson, Houston, TX (US);
Abstract
A novel method for permanently disposing of liquid or semi-liquid wastes containing soluble toxic materials to prevent the toxic materials from being leached into the surrounding environment is disclosed. The process comprises admixing the liquid or semi-liquid waste, such as aqueous sludge from the manufacture of phosphoric acid containing soluble and insoluble arsenic, sulfur and like toxic compounds, with a solidifying agent consisting essentially of a hydraulic cement in amounts sufficient to provide a fluid mass that will set to a contiguous rock-like solid upon standing, and then allowing the admixture to set to a contiguous rock-like solid mass which is insoluble in water. By the inventive process, the soluble and insoluble toxic materials of the waste are wholly entrapped in the contiguous rock-like solid mass which thereby prevents them from being leached into the surrounding environment when exposed to ambient moisture.