Middle distillate compositions with improved filterability and process therefor
Amine derivatives of thio-bis-lactone acids in combination with coadditive hydrocarbons are flow improvers for middle distillate fuel oils
Spirolactone condensation product dispersants and lubricants containing same Patent #: 4532058
ApplicationNo. 567966 filed on 08/15/1990
US Classes:44/351, Acyclic chalcogen bonded directly to ring carbon of the hetero ring (e.g., five-membered lactones, anhydrides, sorbitans, etc.)44/340, The hetero ring contains five members including nitrogen and carbon (e.g., pyrrolidones, porphines, etc.)44/352, Ring carbons of the hetero ring are unsubstituted or hydrocarbyl substituted only44/386Compound of indeterminate structure prepared by reacting an organic -C(=O)O- compound
ExaminersPrimary: McAvoy, Ellen M.
Attorney, Agent or Firm
Foreign Patent References
International ClassesC10L 001/18
Foreign Application Priority Data1989-08-16 DE
AbstractThe use of products of the reaction of alkenyl-spirobislactones of the formula ##STR1## in which R is in each case C8 -C200 -alkenyl, with amines of the formulaNR1 R2 R3in which R1, R2 and R3 may be identical or different and at least one of these groups R1, R2 or R3 is C8 -C36 -alkyl, C8 -C36 -alkenyl or cyclohexyl and the other groups are hydrogen or a group of the formula --(A--O)x H or --(CH2)n --NYZ, A is --C2 H4 -- and/or --C3 H6 --, x is a number from 1 to 20, n is 2 or 3 and Y and Z may be identical or different and are hydrogen or a group of the formula (--A--O)x H, as paraffin-dispersants in middle distillates and crude oil.