Compositions comprising dimeric or oligomeric ferrocenes
AssigneeInnospec Limited
InventorsStephen Leonard Cook, Werner Kalischewski, Gabriele Lohmann, Armin Marschewski
Life of this patent
Estimating the term…
Abstract
The present invention relates to iron-organo compounds and the use of such compounds in the regeneration of particulate filter traps in combustion systems such as high-compression spontaneous ignition engines. The iron-organo compounds have the formula X-Y where X represents the group of formula Y represents the formula each A and B is independently an unsubstituted or substituted aromatic carbon ring or an unsubstituted or substituted aromatic heterocyclic ring; the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group; n is 0 or an integer of from 1 to 10.
Claims39
A composition, which comprises:
- i) one or more compound of formula (I):
- X—Y (I)
- where:
- X represents the group of formula (II):
- Y represents the group of formula (III):
- one of A and B is an unsubstituted 3-membered aromatic carbon ring and the other of A or B is an unsubstituted 7-membered aromatic carbon;
- the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group;
- n is 0 or an integer of from 1 to 10;
- and
- ii) a diluent or carrier;
- and
- wherein said one or more compound of formula (I) is present in an amount sufficient to provide at least 1 wt. % of iron, based on the weight of the composition.
A method of regenerating a particle filter trap located in the exhaust system of a combustion system for fuel, which comprises contacting carbon-based particulates, present in the particle filter trap, with combustion products.
- having a composition which comprises:
- i) one or more compound of formula (I):
- X—Y (I)
- where:
- X represents the group of formula (II):
- Y represents the group of formula (III):
- each A and B is an unsubstituted aromatic carbon ring;
- the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group;
- n is 0 or an integer of from 1 to 10;
- and
- ii) a diluent or carrier;
- and
- wherein said one or more compound of formula (I) is present in an amount sufficient to provide at least 1 wt. % of iron, based on the weight of the composition.
A method for decreasing the regeneration temperature of a particle filter trap located in the exhaust system of a combustion system comprising adding to fuel for said combustion system a composition comprising
- i) one or more compound of formula (I):
- X—Y (I)
- where:
- X represents the group of formula (II):
- Y represents the group of formula (III):
- each A and B is an unsubstituted aromatic carbon ring;
- the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group;
- n is 0 or an integer of from 1 to 10;
- and
- ii) a diluent or carrier;
- and
- wherein said one or more compound of formula (I) is present in an amount sufficient to provide at least 1 wt. % of iron, based on the weight of the composition.
A method of regenerating a particle filter trap located in the exhaust system of a combustion system for fuel, which comprises contacting carbon-based particulates, present in the particle filter trap, with combustion products of one or more compound which comprises:
- i) one or more compound of formula (I):
- X—Y (I)
- where:
- X represents the group of formula (II):
- Y represents the group of formula (III):
- each A and B is an unsubstituted aromatic carbon ring;
- the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group;
- n is 0 or an integer of from 1 to 10;
- and
- ii) a diluent or carrier;
- and
- wherein said one or more compound of formula (I) is present in an amount sufficient to provide at least 1 wt. % of iron, based on the weight of the composition.
A method of regenerating a particle filter trap located in the exhaust system of a combustion system for fuel, which comprises contacting carbon-based particulates, present in the particle filter trap, with combustion products of a composition comprising:
- i) one or more compound of formula (I):
- X—Y (I)
- where:
- X represents the group of formula (II):
- Y represents the group of formula (III):
- each A and B is independently an unsubstituted or substituted aromatic carbon ring or an unsubstituted or substituted aromatic heterocyclic ring;
- the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group;
- n is 0 or an integer of from 1 to 10;
- and
- ii) a diluent or carrier;
- and
- wherein said one or more compound of formula (I) is present in an amount sufficient to provide at least 1 wt. % of iron, based on the weight of the composition.
A method for decreasing the regeneration temperature of a particle filter trap located in the exhaust system of a combustion system comprising adding a composition to fuel for said combustion system, said composition comprising:
- i) one or more compound of formula (I):
- X—Y (I)
- where:
- X represents the group of formula (II):
- Y represents the group of formula (III):
- each A and B is independently an unsubstituted or substituted aromatic carbon ring or an unsubstituted or substituted aromatic heterocyclic ring;
- the or each Z is independently an unsubstituted or substituted divalent hydrocarbyl group;
- n is 0 or an integer of from 1 to 10;
- and
- ii) a diluent or carrier;
- and
- wherein said one or more compound of formula (I) is present in an amount sufficient to provide at least 1 wt. % of iron, based on the weight of the composition.
Dependencies are inferred from the claim text.