Composition and nature of conversion of resins from middle-distillate fuels

Conclusions

• 1. The resins that can be removed chroma tographically from middle-distillate fuels include condensed structures that are insoluble in the fuel.

• 2. The presence of these materials in fuel can be explained on the basis that the predominant part of the fuel-soluble resins acts as a buffer solvent toward the insoluble resins. When these insoluble resins reach a certain concentration, they form a colloidal system with the fuel.

• 3. The more highly condensed are the resins, the greater is their effect in the fuel on the formation of new resins, beginning with their primary, fuel-soluble forms.