HF alkylation with product recycle employing two reactors
A method is described for continuously preparing alkylate by contacting olefin with paraffin in the presence of HF catalyst. The method consists of: (a) contacting about one-half of the total olefin feed stock with fresh and recycle paraffin in the presence of HF catalyst in a first reactor to produce a first reactor product effluent, the reactants present in a ratio of paraffin to olefin of about 6:1 to about 100:1; (b) discharging the first reactor product effluent into a settled HF catalyst is discharged from the base and reactor product effluent comprising alkylate, unreacted feed stock and HF catalyst is removed above the reactor effluent inlet to the settler; (c) recycling a portion of the reactor product effluent from the settler into contact with the remaining about one-half of the total olefin feed stock in the presence of HF catalyst in a second riser reactor to produce a second reactor product effluent, the reactants present in a ratio of about 6:1 to about 100:1; (d) discharging the second reactor product effluent into the settler; (e) discharging settled HF catalyst from the settler base; (f) proportioning the HF catalyst between the first and the second riser reactor; and (g) recovering as system product from the settler the portion.
- Assignee:
- Phillips Petroleum Co., Bartlesville, OK
- Patent Number(s):
- US 4579998
- OSTI ID:
- 5847343
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKANES
ALKENES
ALKYLATION
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMICAL REACTORS
HYDROCARBONS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PARAFFIN
QUANTITY RATIO
WAXES
YIELDS