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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.:

US 4652433 B1

PDFFull Text
Date of Patent:
Mar. 24, 1987

Filed:

Jan. 29, 1986

Method for the recovery of minerals and production of by-products from

Applicant:
Inventors:

Robert A Ashworth, Tampa, FL (US);

Larry A Rodriguez, St. Petersburg, FL (US);

Antonio A Padilla, Tampa, FL (US);

Ned B Spake, Winter Park, FL (US);

W Wes Berry, Brandon, FL (US);

Rae A Schmeda, Littleton, CO (US);

Assignee:

Florida Progress Corporation, St. Petersburg, FL (US);

Attorney:

Hellwege; James W.

Primary Examiner:

John Doll

Assistant Examiner:

Robert L Stoll

Int. Cl.
CPC ...
C01F / ; C01G / ;
U.S. Cl.
CPC ...
423112 ; 423113 ; 423122 ; 423126 ; 423132 ; 423139 ; 423140 ; 423150 ; 423493 ; 423495 ; 423625 ; 423632 ; 423633 ; 7510 / ; 7510 / ; 75114 ; 75121 ; 209 10 ; 2091725 ; 209164 ; 209214 ;
Abstract

The method of the present invention is a novel comprehensive process for maximizing the recovery of valuable mineral values from coal ash. Options may also be included for the production of saleable inorganic chemical by-products. The process employs both physical and chemical extraction techniques that maximize the yield of products while reducing the quantity of waste produced. Valuable minerals and chemicals such as cenospheres (hollow microspheres), carbon, magnetite (Fe.sub.3 O.sub.4), alumina (Al.sub.2 O.sub.3), iron oxide (Fe.sub.2 O.sub.3) and iron chloride (FeCl.sub.3) may be produced. Due to removal of carbon, magnetite, and iron oxide from the coal ash, the processed ash comprises a quality pozzolan.

Find Patent Forward Citations

Ashworth, Robert. (1987). Method for the recovery of minerals and production of by-products from (U.S. Patent No. 4652433). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4652433

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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