Richard J Sujdak

US Patent:

56119399, Mar 18, 1997

Filed:

Jun 3, 1996

Appl. No.:

8/657122

Inventors:

Roy Hernandez-Mena - The Woodlands TX
Richard J. Sujdak - Yardley PA
Patric L. Friend - Conroe TX

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C02F 150

US Classification:

210764

Abstract:

Methods for inhibiting the attachment of microbes to surfaces in aqueous systems are disclosed. Copolymers of a tannin and a cationic monomer are added to aqueous systems, such as papermaking and cooling water systems, to inhibit microbial attachment to surfaces which cause slime formation problems.

US Patent:

62910205, Sep 18, 2001

Filed:

Aug 8, 1996

Appl. No.:

8/694148

Inventors:

Jeffrey I. Melzer - Lansdale PA
Richard J. Sujdak - Yardley PA

Assignee:

Betzdearborn Inc. - Trevose PA

International Classification:

B05D 716

US Classification:

427387

Abstract:

A method of forming a hydrophilic coating on a metal surface which includes contacting the metal surface with a substantially silane-free aqueous solution containing a cationic polymer and an alkaline aqueous silicate.

US Patent:

47965487, Jan 10, 1989

Filed:

May 8, 1984

Appl. No.:

6/608053

Inventors:

Gene A. Merrell - Huntingdon Valley PA
Richard J. Sujdak - Morrisville PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

F23J 1100

US Classification:

110343

Abstract:

In a coal fired boiler of the type having a combustion zone in which said coal is fired, a convection zone located downstream from said combustion zone and having a plurality of heater tubes disposed therein adapted to heat water or steam disposed therein, and in which convection zone combustion residues emanating from said coal have a tendency to stick to or agglomerate upon said tubes, a method of decreasing said tendency to stick or agglomerate, comprising burning said coal in the presence of an additive consisting essentially of super large magnesium oxide particles, a major mass fraction of which is about 150 microns in diameter or greater.

US Patent:

56956525, Dec 9, 1997

Filed:

Jan 29, 1997

Appl. No.:

8/791797

Inventors:

Roy Hernandez-Mena - The Woodlands TX
Richard J. Sujdak - Yardley PA

Assignee:

BetzDearborn Inc. - Trevose PA

International Classification:

C02F 150

US Classification:

210764

Abstract:

Methods for inhibiting the attachment of microbes to surfaces in aqueous systems are disclosed. Tea extracts and/or tannins are added to aqueous systems, such as papermaking and cooling water systems, to inhibit microbial attachment to surfaces which cause slime formation problems.

US Patent:

41850718, Jan 22, 1980

Filed:

Oct 13, 1978

Appl. No.:

5/950960

Inventors:

Richard J. Sujdak - Morrisville PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1100
C23F 1102

US Classification:

422 9

Abstract:

A method of reducing the amount of corrosion due to sulfuric acid on metal parts at the cold-end of a combustion system and in contact with combustion gases derived from the combustion of sulfur-containing fuel, said method comprising adding to the combustion gases an effective amount for the purpose of an ethylene polyamine additive.

US Patent:

42241804, Sep 23, 1980

Filed:

Oct 30, 1979

Appl. No.:

6/089680

Inventors:

Richard J. Sujdak - Morrisville PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1100
C23F 1102

US Classification:

252392

Abstract:

The present invention is drawn to ethylene polyamines in combination with certain alkanolamines as cold-end additives. More specifically, it has been discovered that if these additives are fed to the moving combustion gases of a combustion system which uses sulfur containing fuel and upstream of cold-end surfaces to be treated, the additive will travel along with the gases as vapor and/or liquid droplets and deposit on the cold-end surfaces. As a result, the amount of sulfuric acid corrosion of metallic cold-end surfaces is reduced.

US Patent:

42061725, Jun 3, 1980

Filed:

Mar 12, 1979

Appl. No.:

6/019687

Inventors:

Richard J. Sujdak - Morrisville PA

Assignee:

Betz Laboratories, Inc. - Trevose PA

International Classification:

C23F 1100
C23F 1102

US Classification:

422 9

Abstract:

The present invention is drawn to ethylene polyamines in combination with certain alkanolamines as cold-end additives. More specifically, it has been discovered that if these additives are fed to the moving combustion gases of a combustion system which uses sulfur containing fuel and upstream of cold-end surfaces to be treated, the additive will travel along with the gases as vapor and/or liquid droplets and deposit on the cold-end surfaces. As a result, the amount of sulfuric acid corrosion of metallic cold-end surfaces is reduced.