Mineral oils: processes and products – Paraffin wax; treatment or recovery – Separation of paraffin from oil
Patent
1982-09-29
1984-07-17
Gantz, Delbert E.
Mineral oils: processes and products
Paraffin wax; treatment or recovery
Separation of paraffin from oil
C10G 7304
Patent
active
044604530
ABSTRACT:
It has been discovered that (a) poly di alkyl fumarate/vinyl acetate copolymers in combination with (B) poly alkyl (meth-) acrylate polymers are effective dewaxing aids for the solvent dewaxing of bright stocks. The poly di alkyl fumarate/vinyl acetate copolymer component of the combination dewaxing aid used in the process of the present invention has a number average molecular weight of about 1000 to 100,000 and possesses alkyl side chain moieties of from C.sub.16 -C.sub.24.sup.+ in length (excluding branching) with a pendent side chain length of predominantly (>50%) C.sub.20. The polyalkyl (meth-) acrylate is the polymeric ester of aliphatic alcohols having groups 10 to 20 carbons in length, excluding branching (pendent side chain length predominantly (>50%) C.sub.14 and lower) and acrylic or (meth-) acrylic acid (preferably methacrylic acid) and possesses a number average molecular weight of at least 5,000. The solvent dewaxing processes benefitted by the use of the present combination are those using standard normally liquid solvents such as C.sub.3 -C.sub.6 ketones, aromatic hydrocarbons, halogenated hydrocarbons and mixtures thereof. The waxy hydrocarbon oil dewaxed is a bright stock. The dewaxing aid combination may be used at dose level of from about 0.005 to 5 wt. % active ingredient at a component A/B ratio of about 4/1 to 1/100, preferably about 1/1 to 1/20, and most preferably about 1/3.
REFERENCES:
patent: 2798027 (1957-07-01), Cohen
patent: 3239445 (1966-03-01), Leonard et al.
patent: 3262873 (1966-07-01), Tiedje et al.
patent: 3458430 (1969-07-01), Henselman et al.
patent: 3475321 (1969-10-01), Henselman
patent: 3479278 (1969-11-01), DeVault
patent: 3729296 (1973-04-01), Miller
patent: 3806442 (1974-04-01), Reid et al.
patent: 3854893 (1974-12-01), Rossi
patent: 4088589 (1978-05-01), Rossi et al.
patent: 4153423 (1979-05-01), Wisotsky
patent: 4191631 (1980-03-01), Grisham
Gudelis David A.
Reid Lloyd E.
Allocca Joseph J.
Caldarola Glenn A.
Exxon Research and Engineering Co.
Gantz Delbert E.
LandOfFree
Solvent dewaxing waxy bright stock using a combination polydialk does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Solvent dewaxing waxy bright stock using a combination polydialk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solvent dewaxing waxy bright stock using a combination polydialk will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1489762