Solvent dewaxing waxy bright stock using a combination polydialkylfumarate-vinyl acetate copolymer and wax-naphthalene condensate dewaxing aid

Patent · Tue Mar 27 04:00:00 EST 1984

OSTI ID:6641828

Gudelis, D A; Reid, L E

This invention relates to processes for solvent dewaxing bright stock waxy raffinate oil employing a dewaxing aid which dewaxing aid is a mixture of (a) poly dialkyl fumarate/vinyl acetate copolymers and (b) a wax-naphthalene condensate. The dewaxing aid mixture is a mixture of (a) poly dialkyl fumarate/vinyl acetate copolymer having a number average molecular weight of about 1,000 to 100,000, preferably 5,000 or greater, possessing alkyl side chain moieties of from C/sub 16/-C/sub 24//sup +/ in length (excluding branching) with an average pendent side chain length of predominantly (>50%) C/sub 20/ and (b) a wax-naphthalene condensation product having a number average molecular weight of about 1,000 and greater. The combination (a) plus (b) may be employed in a weight ratio within the range from about 45/55 to 1/100, preferably about 1/3, and at an aid dose level ranging from about 0.005 to 2.0 wt %, preferably 0.01 to 0.2 wt % active ingredient.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4439308
• OSTI ID: 6641828
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ACETATES
AROMATICS
CARBOXYLIC ACID SALTS
CATALYTIC EFFECTS
CHEMICAL COMPOSITION
CONDENSATES
CONDENSED AROMATICS
DEWAXING
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCARBONS
MOLECULAR WEIGHT
NAPHTHALENE
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
POLYMERS
SEPARATION PROCESSES
WAXES