Process for alkylation of hydrocarbons

Patent · Tue Sep 22 04:00:00 EDT 1987

OSTI ID:5896733

De Graff, R R

This patent describes a fixed-bed hydrocarbon alkylation process which comprises the steps of: (a) passing a reaction zone effluent stream comprising a volatile light hydrocarbon and less volatile feed and product hydrocarbons into a lower portion of a rectified separation zone. The zone is operated at conditions effective to separate the entering hydrocarbons into an overhead vapor stream which is rich in the light hydrocarbon and a bottoms stream comprising the feed and product hydrocarbons; (b) separating the bottoms stream in a fractionation zone into a liquid-phase recycle stream which is rich in the feed hydrocarbon and a product stream which is rich in the product hydrocarbon, and withdrawing the product stream from the process; (c) passing a portion of the recycle stream into a contact-exchanger located in an upper portion of the rectified separation zone. It receives a rectified vapor stream comprising the volatile light hydrocarbon and the feed hydrocarbon from the lower portion of the rectified separation zone, removing heat and the feed hydrocarbon from the rectifier vapor stream by direct contact and producing the overhead vapor stream and a rectifier exchanger liquid stream. This stream is withdrawn from the rectified separation zone at a point above the lower portion of the rectified separation zone and below the contact-exchanger; and, (d) passing the rectifier exchanger liquid stream and a feed stream comprising the volatile light hydrocarbon into a reaction zone maintained at reaction conditions and producing the reaction zone effluent stream.

• Assignee: UOP Inc., Des Plaines, IL
• Patent Number(s): US 4695665
• OSTI ID: 5896733
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALKYLATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
FLUIDS
FRACTIONATION
GASES
HYDROCARBONS
ION EXCHANGE
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
MATTER
ORGANIC COMPOUNDS
PACKED BED
REACTION KINETICS
RECYCLING
SEPARATION PROCESSES
VAPORS
VOLATILE MATTER