Fuel and related compositions – Liquid fuels – Organic nitrogen compound containing
Patent
1997-04-10
1998-03-10
Howard, Jacqueline V.
Fuel and related compositions
Liquid fuels
Organic nitrogen compound containing
560355, 560359
Patent
active
057256128
ABSTRACT:
New, highly effective detergent/dispersants for use in spark ignition fuels are described. They are Mannich condensation products formed from (i) one mole part of at least one substituted hydroxyaromatic compound having on the ring both (a) an aliphatic hydrocarbyl substituent derived from a polyolefin having a number average molecular weight in the range of about 500 to about 3000, and (b) a C.sub.1-4 alkyl; (ii) from 0.8 to 1.5 mole part(s) of aliphatic polyamine having one and only one primary or secondary amino group in the molecule capable of participating in the Mannich condensation reaction; and (iii) from 0.8 to 1.3 mole part(s) of aldehyde, provided that the mole ratio of aldehyde to amine is 1.2:1 or less. Carrier fluids such as poly(oxyalkylene) compounds further enhance the effectiveness of these Mannich condensation products in minimizing or reducing intake valve deposits and/or intake valve sticking.
Colucci William J.
Franklin Randall M.
Malfer Dennis J.
Ethyl Corporation
Howard Jacqueline V.
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