Patents by Inventor Harry Hutchinson Holton

Harry Hutchinson Holton has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

Delignification of lignocellulosic material with a soda pulping liquor containing a Diels Alder adduct of benzoquinone or naphthoquinone in admixture with a nitro aromatic compound

Patent number: 4036680

Abstract: Delignification of lignocellulosic material, such as wood, straw or bagasse, with a soda pulping liquor containing a diketo hydroanthracene selected from the unsubstituted and lower alkyl-substituted Diels Alder adducts of naphthoquinone and benzoquinone and a nitro aromatic compound selected from mono and di-nitrobenzenes and the amino, carboxy, hydroxy and methyl derivatives of said nitrobenzenes.

Type: Grant

Filed: December 14, 1976

Date of Patent: July 19, 1977

Assignee: Canadian Industries, Ltd.

Inventors: Harry Hutchinson Holton, Gordon Hart Segall
Delignification of lignocellulosic material with an alkaline pulping liquor containing a Diels Alder adduct of benzoquinone or naphthoquinone

Patent number: 4036681

Abstract: Delignification of lignocellulosic material, such as wood, straw or bagasse, by treatment with an alkaline pulping liquor containing a diketo hydroanthracene selected from the unsubstituted and lower alkyl substituted Diels Alder adducts of benzoquinone and naphthoquinone.

Type: Grant

Filed: December 14, 1976

Date of Patent: July 19, 1977

Assignee: Canadian Industries, Ltd.

Inventor: Harry Hutchinson Holton
Delignification of lignocellulosic material with an alkaline liquor in the presence of a cyclic keto compound

Patent number: 4012280

Abstract: Delignification of lignocellulosic material by treatment with an alkaline liquor in the presence of a cyclic keto compound such as anthraquinone.

Type: Grant

Filed: August 30, 1976

Date of Patent: March 15, 1977

Assignee: Canadian Industries, Ltd.

Inventor: Harry Hutchinson Holton

Delignification of lignocellulosic material with a soda pulping liquor containing a Diels Alder adduct of benzoquinone or naphthoquinone in admixture with a nitro aromatic compound

Delignification of lignocellulosic material with an alkaline pulping liquor containing a Diels Alder adduct of benzoquinone or naphthoquinone

Delignification of lignocellulosic material with an alkaline liquor in the presence of a cyclic keto compound