Ronald L Reich

US Patent:

59389273, Aug 17, 1999

Filed:

Jul 8, 1997

Appl. No.:

8/889381

Inventors:

Ronald A. Reich - Pittsburgh PA
Ronald P. Festa - New Kensington PA
Mark L. Weaver - Pittsburgh PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

B01D 1102

US Classification:

210634

Abstract:

Oil and oil additives separated from a contaminated solid particulate filter medium, preferably diatomaceous earth particles. Portions of a mixture of oil, oil additives and the filter medium are compressed into pellets that are extracted with liquid or supercritical CO. sub. 2 to form a liquid solution. The solution is separated from the pellets and then heated to 20. degree. -60. degree. C. at a superatmospheric pressure to drive off CO. sub. 2 gas, which is preferably recycled by compression into liquid or supercritical CO. sub. 2.

US Patent:

46098747, Sep 2, 1986

Filed:

Jan 11, 1984

Appl. No.:

6/569968

Inventors:

Ronald A. Reich - Aspinwall PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

G01N 2756

US Classification:

324438

Abstract:

An improved system for the monitoring of pH of a liquid containing oil and water by directing the flow of at least a portion of the liquid into contact with the electrode of a pH meter for measuring the pH of the liquid, interrupting the flow of liquid to the electrode periodically, directing the flow of a washing solution into contact with the electrode to remove any depositions on the electrode, and then resuming the flow of the liquid into contact with the electrode to continue the monitoring of pH of the liquid without the need for manual removal and cleaning of the glass electrode.

US Patent:

60012455, Dec 14, 1999

Filed:

Apr 20, 1998

Appl. No.:

9/063096

Inventors:

Ronald A. Reich - Allison Park PA
Thomas J. Kasun - Export PA
Raymond J. Colbert - Oakmont PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

B01D 3528
B01D 1100

US Classification:

210168

Abstract:

A process for separating oil from a lubricant composition containing solid particles. The contaminated lubricant composition is mixed with liquid or supercritical CO. sub. 2 before the lubricant composition and CO. sub. 2 mixture is filtered through a filter medium. The CO. sub. 2 is then evaporated, leaving an oil residue. Mixing the lubricant composition with CO. sub. 2 before filtration prevents the filter medium from being blinded by solid particles.