Wayne P Cook

US Patent:

47073730, Nov 17, 1987

Filed:

Jul 18, 1986

Appl. No.:

6/887308

Inventors:

Wayne L. Cook - Cincinnati OH
Robert P. Huth - Milford OH

Assignee:

Hilton Davis Co. - Cincinnati OH

International Classification:

A23L 1275

US Classification:

426540

Abstract:

Salts of phenylazonaphthyl sulfonic acids useful as blue-red colorants for textile fabrics, cellulosic fibers and edible compositions are prepared by diazotizing aniline sulfonic acid and coupling the resulting diazo compound to a 1-hydroxynaphthalene mono- or disulfonic acid.

US Patent:

45607460, Dec 24, 1985

Filed:

Nov 30, 1984

Appl. No.:

6/677118

Inventors:

Robert W. J. Rebhahn - Berkley MA
Wayne L. Cook - Cincinnati OH

Assignee:

The Hilton-Davis Chemical Co. - Cincinnati OH

International Classification:

C09B 2916
C09B 6754
C09B 6900

US Classification:

534840

Abstract:

The disodium salt of 1-[(6-methoxy-4-sulfo-3-methylphenyl)azo]-2-naphthol-6-sulfonic acid (FD and C Red 40), the disodium salt of 1-[(4-sulfophenyl)azo]-2-naphthol-6-sulfonic acid (FD and C Yellow 6), the trisodium salt of 1-[1-(4-sulfonaphthyl)azo]-2-naphthol-3,6-disulfonic acid (FD and C Red 2), the disodium salt of 2-[1-(4-sulfonaphthyl)azo]-1-naphthol-4-sulfonic acid (Carmoisine) and the sodium salt of 2-(2-quinolyl)-1,3-indanedione-sulfonic acid (D and C Yellow 10) are prepared and purified in high yield and in a high state of purity by subjecting their aqueous reaction mixtures to ultrafiltration through a membrane of such structure and under such conditions that the impurities are separated from the reaction mixtures, and the products are concentrated in high purity concentrates from which the products can be isolated directly by evaporation of the solvent.

US Patent:

46753893, Jun 23, 1987

Filed:

Jun 5, 1984

Appl. No.:

6/617451

Inventors:

Wayne L. Cook - Cincinnati OH
Robert P. Huth - Milford OH

Assignee:

The Hilton-Davis Chemical Co. - Cincinnati OH

International Classification:

A23L 1275
C09B 2901
C09B 2916
D06P 139

US Classification:

534883

Abstract:

Physiologically acceptable cation salts of (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acids useful as blue-red colorants for textile fabrics, cellulosic fibers and edible compositions are prepared by diazotizing 2-alkoxy-4-sulfonyl-5-alkylanilines and coupling the resulting diazo compounds to a 1-hydroxynaphthalene mono- or disulfonic acid.