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US 4,792,413 AGranted
Novel cleaning composition for removal of PCBs
AssigneeCapsule Environmental Engineering, 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 distillate and wetting agent mixtures.
Claims2
A composition for PCB clean-up comprising:
- ______________________________________ Constituent Weight % ______________________________________ 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.
A composition for PCB clean-up comprising:
- ______________________________________ Constituent Weight % ______________________________________ 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.
Dependencies are inferred from the claim text.