Robert G Littmann

US Patent:

45320454, Jul 30, 1985

Filed:

Jul 7, 1982

Appl. No.:

6/396042

Inventors:

Robert J. Littmann - Westfield NJ

Assignee:

Waterscience, Inc. - Somerville NJ

International Classification:

B01D 1504

US Classification:

210668

Abstract:

A heat exchange system and process for reducing bleed-off are disclosed employing a weak acid cation exchange resin for treating the aqueous liquid coolant. In one such system and process, the aqueous coolant is treated with a weak acid ion exchange resin to remove alkaline salts therefrom without removing salts of strong acids; suspended solids are removed from the circulating aqueous coolant; and an effective amount of additive selected from the group consisting of scale inhibitors, corrosion inhibitors, microbiocides, and mixtures thereof is introduced into the circulating aqueous coolant so that bleed-off from said system is substantially reduced.

US Patent:

46288368, Dec 16, 1986

Filed:

Aug 24, 1984

Appl. No.:

6/644312

Inventors:

Robert J. Littmann - Westfield NJ

Assignee:

Waterscience, Inc. - Somerville NJ

International Classification:

F23J 700

US Classification:

110343

Abstract:

A process is disclosed for inhibiting corrosion of metal surfaces and deposition of particulates in an air preheater system. In the process, a composition (preferably aqueous) comprising a corrosion inhibiting amine and a surfactant having an HLB value of from about 8 to about 20, preferably from about 10 to about 14, is supplied to the combustion gas-in side and/or to the air-in side of the air preheater for protection of the metal surfaces and minimizing such deposits. In a preferred embodiment, the process of the invention can employ an amine salt of a C. sub. 12 to C. sub. 24 tertiary alkyl amine an amine oxide, or an amine oxide salt, either alone or with a surfactant.