Carbamates, their production and use as fuels additives

Details Carbamates, their production and use as fuels additives Carbamates, their production and use as fuels additives

1992-04-14

1994-02-15

Howard, Jacqueline V.

Fuel and related compositions

Liquid fuels

Containing organic -c

44419, 44329, C10L 122

Patent

active

052862658

ABSTRACT:
The invention relates to an internal combustion fuel concentrate comprising: (a) from 1 to 95% of a chlorine-free carbamate prepared by reacting a carbamate of formula ##STR1## with a compound of the formula R OH (VI) in the presence of either a strone organic base or a tetra hydrocarbyl titanate so as to exchange the group R in formula (I) with a group R.sup.1 in formula (II), and (b) a fuel compatible solvent therefor. In the formula (I) R is a hydrocarbyl or substituted hydrocarbyl group and R.sup.1 is a hydrocarbyl or a hetero-substituted hydrocarbyl group different from R. In formula (I), X and Y are independently any of hydrogen, a hydrocarbyl group, or the group of the formula ##STR2## where Z is either a divalent hydrocarbyl, a substituted hydrocarbyl group or the group of formula

REFERENCES:
patent: 4236020 (1980-11-01), Lewis et al.
patent: 4274837 (1981-06-01), Lilburn
patent: 5103041 (1992-04-01), A'Court et al.
patent: 5126477 (1992-06-01), A'Court et al.
patent: 5167670 (1992-12-01), Johnson

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