Recovery and recycle of dewaxing aid

Patent · Tue Mar 11 04:00:00 EST 1980

OSTI ID:5538299

Komine, K; Ohashi, F; Onodera, T

Dewaxing aid used in a solvent dewaxing process is recovered in wax bottoms from slack wax by vacuum distilling the slack wax to about 5-10 wt. % bottoms at a temperature no greater than about 320/sup 0/ C. The dewaxing aid-containing wax bottoms is recycled into the dewaxing process by adding same to the wax-containing oil feed in an amount ranging from about 0.5-5 wt. %. This has been found to be particularly advantageous when the dewaxing aid is an alpha-olefin copolymer, a chlorinated paraffin/naphthalene condensation product and mixture thereof because of their thermal stability.

• Assignee: Toa Nenryo Kogyo K K (Japan)
• Patent Number(s): US 4192732
• OSTI ID: 5538299
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ALKENES
AROMATICS
CONDENSED AROMATICS
DEWAXING
DISTILLATION
HYDROCARBONS
MANAGEMENT
MATERIALS RECOVERY
NAPHTHALENE
ORGANIC COMPOUNDS
PROCESSING
RECOVERY
RECYCLING
SEPARATION PROCESSES
SOLVENTS
STABILITY
VACUUM SYSTEMS
WASTE MANAGEMENT
WASTE PROCESSING