Fractionation Patents (Class 208/308)
- With blending of separated fractions with each other or with feed (Class 208/312)
- Extractive distillation (Class 208/313)
- Plural stages with different oil miscible solvents (Class 208/314)
- Counter current multistage extraction (Class 208/317)
- With recycle of oil (Class 208/318)
- With pressure variation (Class 208/319)
- With temperature gradient in extraction zone or between extraction zones (Class 208/320)
- With solvent rehabilitation (Class 208/321)
- Organic solvent containing (Class 208/322)
- Liquid sulfur dioxide (Class 208/338)
- Liquid-liquid contacting (Class 208/339)
- With nonvapor compound added prior to or during vaporization (Class 208/348)
- With nonvaporization treatment of liquid condensate or residue (Class 208/349)
- Rectification (Class 208/350)
- Spraying (Class 208/359)
- Filming (Class 208/360)
- Flash vaporization (Class 208/361)
- With added gas or vapor (Class 208/362)
- Plural stages of vaporization (Class 208/364)
- Vacuum or pressure (Class 208/366)
- With agitation of distilland (Class 208/367)
- Condensatin by direct heat exchange (Class 208/368)
- Volatile treatment other than condensation (Class 208/369)