Methods for preparing fuel additives
AssigneeBP Oil International Limited
InventorSorin Vasile Filip
Life of this patent
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Abstract
Methods for preparing an octane-boosting fuel additive having the following formula: are provided. In a first aspect, the method may comprise carrying out the following reaction: (i), (ii) In a second aspect, the method may comprise: (1) preparing the fuel additive; and (2) purifying the product of step (1) by: (a) dissolving the fuel additive in a water-insoluble solvent to form a solution; (b) washing the solution with water; and (c) separating the fuel additive product from the water-insoluble solvent using distillation. Steps (i) and (1) of the methods are carried out in the presence of butylated hydroxytoluene.
Claims20
A method for preparing a fuel additive having the formula:
- where:
- R1, R2 and R3 are hydrogen;
- R4, R5, R11 and R12 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- R6, R7, R8 and R9 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- X is selected from —O— or —NR10—, where R10 is selected from hydrogen and alkyl groups;
- and
- n is 0 or 1,
- said method comprising carrying out the following reaction:
- where:
- L and L′ are each independently selected from leaving groups,
- wherein step (i) is carried out in the presence of butylated hydroxytoluene.
A method for preparing a fuel additive having the formula:
- where:
- R1, R2 and R3 are hydrogen;
- R4, R5, R11 and R12 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- R6, R7, R8 and R9 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- X is selected from —O— or —NR10—, where R10 is selected from hydrogen and alkyl groups;
- and
- n is 0 or 1,
- said method comprising the following steps:
- (1) preparing the fuel additive in the presence of butylated hydroxytoluene;
- and
- (2) purifying the fuel additive by:
- (a) dissolving the fuel additive in a water-insoluble solvent to form a solution;
- (b) washing the solution with water;
- and (c) separating the fuel additive product from the water-insoluble solvent using distillation.
An additive composition for a fuel for a spark-ignition internal combustion engine, said additive composition comprising:
- a fuel additive having the formula:
- where:
- R1, R2 and R3 are hydrogen;
- R4, R5, R11 and R12 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- R6, R7, R8 and R9 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- X is selected from —O— or —NR10—, where R10 is selected from hydrogen and alkyl groups;
- and
- n is 0 or 1;
- and
- butylated hydroxytoluene.
A method for stabilising a fuel additive having the formula:
- where:
- R1, R2 and R3 are hydrogen;
- R4, R5, R11 and R12 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- R6, R7, R8 and R9 are each independently selected from hydrogen, alkyl, alkoxy, alkoxy-alkyl, secondary amine and tertiary amine groups;
- X is selected from —O— or —NR10—, where R10 is selected from hydrogen and alkyl groups;
- and
- n is 0 or 1,
- said method comprising blending the fuel additive with butylated hydroxytoluene.
Dependencies are inferred from the claim text.