Title:
SOLVENT DEWAXING METHOD USING COMBINATION OF POLY(N-C24) ALKLY METHACRYLATE AND POLY 8C-20C ALKLY(METH)ACRYLATE AS DEWAXING AID
Document Type and Number:
Japanese Patent JPS63199289
Kind Code:
A
Abstract:
Solvent dewaxing of waxy hydrocarbon oils is improved by using a poly (n-C24) alkyl methacrylate polymer dewaxing aid in combination with lower melting point weight poly (C8-C20) alkyl methacrylate polymer dewaxing aids. The solvent dewaxing processes improved using this combination dewaxing aid are the incremental and total predilution solvent type processes employing either surface chilled indirect heat exchanger means or direct chilling using cold solvent. The solvent dewaxing processes are those employing normally liquid dewaxing solvents, as exemplified by C3-C6 ketones, such as methyl ethyl ketone, methyl isobutyl ketone and mixtures thereof, mixtures of ketones with aromatic such as MEK/toluene, halogenated C2-C4 hydrocarbons such as tetrachloraethane, trichloro ethylene, etc. Autorefrigerative solvent dewaxing processes employing low boiling point, normally gaseous hydrocarbons, such as propane, propylene, butane, butene and mixtures of such solvents, with the aforesaid ketones, e.g., propane/MEK, are also benefited by use of the present dewaxing aid combination. Use of the combination dewaxing aid results in an improvement in feed filter rate and liquids/solids. ratio in the dewaxing process.
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Inventors:
SEODOA HAABII UESUTO
DEIBITSUDO JIYON MAATERA
DEIBITSUDO JIYON MAATERA
Application Number:
JP29225087A
Publication Date:
August 17, 1988
Filing Date:
November 20, 1987
Export Citation:
Assignee:
EXXON RESEARCH ENGINEERING CO
International Classes:
C10G73/04; C10G73/12; (IPC1-7): C10G73/12
Domestic Patent References:
| JPS60229990A | 1985-11-15 | |||
| JPS5730792A | 1982-02-19 |
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)