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Class Information
Number: 162/73
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > Treatment with particular chemical > Organic > With inorganic chlorine containing material
Description: Processes which involve the use of inorganic chlorine containing material in addition to an organic compound.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7368036 |
Xylanase treatment of chemical pulp |
May. 6, 2008 |
| 7320741 |
Method of xylanase treatment in a chlorine dioxide bleaching sequence |
Jan. 22, 2008 |
| 6402887 |
Biopulping industrial wood waste |
Jun. 11, 2002 |
| 4872995 |
Method for calcium oxalate scale control |
Oct. 10, 1989 |
| 4801353 |
Use of chlorous acid for bleaching wood pulp |
Jan. 31, 1989 |
| 4740212 |
Process and composition for bleaching cellulosic material with hypochlorous acid |
Apr. 26, 1988 |
| 4594130 |
Pulping of lignocellulose with aqueous alcohol and alkaline earth metal salt catalyst |
Jun. 10, 1986 |
| 4487656 |
Process for bleaching paper pulp using melamine as a viscosity stabilizer |
Dec. 11, 1984 |
| 4484980 |
Process for bleaching paper pulp using caffeine or guanine as a viscosity stabilizers |
Nov. 27, 1984 |
| 4298428 |
Use of additives in pulp bleaching processes to preserve pulp strength |
Nov. 3, 1981 |
| 4295928 |
Phenolic compounds as viscosity preservatives during hypochlorite pulp bleaching |
Oct. 20, 1981 |
| 4255233 |
Use of polyacrylic acid in pulp bleaching processes to preserve pulp strength and aid in brightness |
Mar. 10, 1981 |
| 4106979 |
Preparation of paper pulps from dicotyledonous plants |
Aug. 15, 1978 |
| 4096029 |
Cellulosic pulp delignification using an acidic bromine-chlorine mixture |
Jun. 20, 1978 |
| 4070232 |
Prehydrolysis and digestion of plant material |
Jan. 24, 1978 |
| 3956165 |
Bleaching aid |
May. 11, 1976 |
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