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US 7,384,434 B2Granted
Reaction of phenols with intermediate triazines
AssigneeAfton Chemical Corporation
InventorsDennis J. Malfer, May D. Thomas, William J. Colucci
Life of this patent
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Abstract
An improved process for preparing a Mannich product employs an intermediate or pre-formed triazine. The product is useful as a detergent in fuel compositions. The fuel compositions containing the Mannich product are useful for controlling intake valve deposits in engines.
Claims2
A process for preparing a Mannich product, comprising:
- reacting a primary amine with an aldehyde to yield an optionally-substituted triazine;
- and
- reacting the optionally substituted triazine with an optionally substituted hydroxyaromatic compound to yield a Mannich product, wherein water is removed from the reaction mixture prior to the reaction of the optionally substituted triazine with the optionally substituted hydroxyaromatic compound.
A process for preparing a Mannich product, comprising
- reacting N,N-dimethyl-1,3-propane diamine with formaldehyde to yield 1,3,5-tris(3-(dimethylamino)propyl) hexahydro-1,3,5-triazine;
- and
- reacting said 1,3,5-tris(3-(dimethylamino)propyl) hexahydro-1,3,5-triazine with a polyisobutylcresol to yield the Mannich product, wherein water is removed from the reaction mixture prior to the reaction of 1,3,5-tris(3-(dimethylamino)propyl) hexahydro-1,3,5-triazine with polyisobutylcresol.
Dependencies are inferred from the claim text.