US PATENT SUBCLASS 162 / 30.1
.~.~ With destruction of organic ingredient in or smelting of liquor

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

1  DF  PROCESSES OF CHEMICAL LIBERATION, RECOVERY OR PURIFICATION OF NATURAL CELLULOSE OR FIBROUS MATERIAL {33}
29  DF  .~ With regeneration, reclamation, reuse, recycling or destruction of digestion fluid {3}
30.1.~.~ With destruction of organic ingredient in or smelting of liquor {7}
30.11  DF  .~.~.~> Treatment of kraft pulping chemicals
31  DF  .~.~.~> Flames combustion
32  DF  .~.~.~> Liquor from digestion using organic compound or including element other than Na, Ca, Mg, O, C, H or S
33  DF  .~.~.~> With mixing of liquors from different digestions
34  DF  .~.~.~> Plural diverse digestion of same fibrous material
35  DF  .~.~.~> Residue converted into liquor different from original liquor
36  DF  .~.~.~> Sulfur dioxide or sulfite containing spent liquor

DEFINITION

Classification: 162/30.1

With destruction of organic ingredient in or smelting of liquor:

(under subclass 29) Processes which include (a) the destruction of the organic constituent of the waste liquor,

or (b) treatment of the product of such destruction to produce a chemical composition for further use in a cellulose digestion process.

(1) Note. Processes of destruction of the organic constituent of waste liquor by oxidation, as well as such processes when accompanied by smelting of the inorganic constituents of the liquor, are included. Also included are processes of digestion which start with smelt, or a product of the smelt such as an aqueous solution thereof, (e.g., green liquor).

(2) Note. This and indented subclasses include the preparation of cellulose liberation, a treating liquor from "smelt" derived from wastes of cellulose treating, or liberating processes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

240, for digestion combined with means to heat the used digestion chemicals.

SEE OR SEARCH CLASS

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing, appropriate subclasses for apparatus for regenerating, reclaiming, or destroying used digestion agents. 423, Chemistry of Inorganic Compounds, appropriate subclasses for the preparation, or recovery of inorganic compounds, not combined with a fiber treating, or liberating step and for the line between the classes, see the note to Class 162, in the definition of Class 423, Lines With Other Classes and Within This Class.