Medium-chain alkanols in additive concentrates for improving foam reduction in fuel oils
AssigneeBASF SE
InventorHarald Böhnke
Life of this patent
Estimating the term…
Abstract
C5- to C15-alkanols are suitable for improving the defoamer action of a silicon-containing anti-foam in fuel oils, especially in biofuel oils, which comprise at least one additive with detergent action. Such alkanols are used in additive concentrates which also comprise aromatic hydrocarbons or hydrocarbon mixtures having a boiling point of 100 to 250° C. or C5- to C12-alkyl nitrates, and also silicon-containing antifoams, additives with detergent action and optionally commercial dehazers.
Claims12
The use of a C5- to C15-alkanol for improving the defoamer action of a silicon-containing antifoam in fuel oils which comprise at least one additive with detergent action.
An additive concentrate comprising
- (A) 0.1 to 10% by weight of at least one C5- to C15-alkanol,
- (B) 0.5 to 80% by weight of either (i) at least one aromatic hydrocarbon or hydrocarbon mixture having a boiling point or a predominant boiling range within the temperature range from 100° C. to 250° C. or (ii) at least one C5- to C12-alkyl nitrate or (iii) a mixture of (i) and (ii), with the proviso that the amount of component (B) is at least five times the amount of the C5- to C15-alkanol of component (A),
- (C) 0.01 to 2% by weight of at least one silicon-containing antifoam,
- (D) 1 to 30% by weight of at least one additive with detergent action and
- (E) 0 to 5% by weight of at least one commercial dehazer,
- where the sum of components (A) to (E) is 100% by weight in each case, and with the proviso that at least one of the following criteria is additionally met:
- (γ) the amount of the additive with detergent action in component (D) is at least ten times the amount of the silicon-containing antifoam in component (C);
- (δ) the amount of the C5- to C15-alkanol of component (A) is at least three times the amount of the silicon-containing antifoam of component (C).
Dependencies are inferred from the claim text.