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US 5,863,881 AGranted
Heavy oil remover
AssigneeCitra Science Ltd.
InventorJack T. Vlasblom
Life of this patent
Estimating the term…
Abstract
A heavy oil remover comprises a cyclic hydrocarbon solvent, dipropylene glycol mono n-butyl ether, a volatility stabilizer, a salt of an alkyl aromatic sulfonic acid, a branched alcohol ethoxylate, an ethoxylated alkyl mercaptan, and water.
Claims28
A heavy oil remover, comprising:
- from about 3 to about 96 weight percent cyclic hydrocarbon solvent;
- from about 1 to about 94 weight percent dipropylene glycol mono n-butyl ether;
- from about 1 to about 95 weight percent volatility stabilizer;
- from about 2 to about 95 weight percent salt of an alkyl aromatic sulfonic acid;
- from about 0.1 to about 75 weight percent branched alcohol ethoxylate;
- from about 0.1 to about 75 weight percent ethoxylated alkyl mercaptan;
- and
- up to about 95 weight percent water.
5 more elements
A heavy oil remover, comprising:
- from about 5 to about 15 weight percent cyclic hydrocarbon solvent;
- from about 5 to about 12 weight percent dipropylene glycol mono n-butyl ether;
- from about 5 to about 15 weight percent volatility stabilizer;
- from about 10 to about 20 weight percent salt of an alkyl aromatic sulfonic acid;
- from about 1 to about 8 weight percent branched alcohol ethoxylate;
- from about 1 to about 7 weight percent ethoxylated alkyl mercaptan;
- and
- up to about 95 weight percent water.
5 more elements
A heavy oil remover, comprising:
- about 10 weight percent d-limonene;
- about 8 weight percent dipropylene glycol mono n-butyl ether;
- about 10 weight percent of a blend of coconut oil methyl esters and sunflower oil methyl esters;
- about 14 weight percent isopropylamine linear dodecylbenzene sulfonate;
- about 4 weight percent branched alcohol ethoxylate;
- about 3 weight percent ethoxylated alkyl mercaptan;
- and
- the balance water.
5 more elements
Dependencies are inferred from the claim text.