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US 4,844,745 AGranted
Novel cleaning composition for removal of PCBS
AssigneeIntegrated Chemistries, Inc.
InventorsJames E. Nash, Kurt E. Heikkila
Life of this patent
Estimating the term…
Abstract
Removal and/or clean-up of polychlorinated biphenyls (PCBs) from contaminated surfaces with novel compositions of petroleum distillates and wetting agents.
Claims1
The method of polychlorinated biphenyl cleanup comprising:
- (1) providing a quantity of a composition selected from the group consisting of
- ______________________________________ Component Weight % ______________________________________ (a) a composition comprising Solvent mixture about 58.0 Monobutyl Ether Ethylene Glycol about 6.5 Cyclohexanol about 4.0 Potassium Tall Oil about 13.0 Monoethanolamine about 8.0 Sulfonic Acid (neutralized) about 8.0 Sodium Metasilicate Pentahydrate about 0.5 Tetrapotassium Pyrophosphate about 2.5 said solvent mixture consists of:
- 6.2% C.sub.9, 67.5% C.sub.10, 10.3% C.sub.11 and 0.7% C.sub.12 alkyl benzenes, 15.0% indanes and tetralines and balance other aromatic hydrocarbons (b) a composition comprising Solvent Mixture about 7.5 Ethylene Glycol Monobutyl Ether about 1.0 Cyclohexanol about 0.5 Potassium Tall Oil about 1.5 Monoethanolamine about 1.0 Sulfonic Acid (neutralized) about 1.0 Sodium Metasilicate Pentahydrate about 0.1 Tetrapotassium Pyrophosphate about 0.4 Water about 87.0 said solvent mixture consists of:
- 6.2% C.sub.9, 67.5% C.sub.10, 10.3% C.sub.11 and 0.7% C.sub.12 alkyl benzenes, 15.0% indanes and tetralines and balance other aromatic hydrocarbons ______________________________________
- (2) aerating the composition to form a foam,
- (3) applying the foam for a time to the surface to be cleaned,
- (4) removing the foam, and
- (5) rinsing the surface.
5 more elements
Dependencies are inferred from the claim text.