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Diesel fuel detergent additive

  • US 5,039,307 A
  • Filed: 10/01/1990
  • Issued: 08/13/1991
  • Est. Priority Date: 10/01/1990
  • Status: Expired due to Term
First Claim
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1. A diesel fuel composition comprising:

  • (a) a major portion of a diesel fuel, and(b) a minor amount, as a diesel fuel injector detergent additive, of a Mannich coupled product of bis-polyisobutylene succinimide of an amine, prepared by;

    (i) reacting an alkenyl succinimide acid anhydride with an amine to form a bis-succinimide;

    (ii) treating the bis-succinimide with nonylphenol in the presence of an aldehyde to form a Mannich phenol coupled bis-succinimide product; and

    (iii) recovering the product Mannich phenol coupled bis-succinimide.

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