Monomer and diluent recovery
A process is described for the separation and recovery of a three-component, hydrocarbon-containing feed comprising olefin monomer, 1-olefin comonomer, and hydrocarbon diluent in two distillation zones having a common accumulation zone wherein the overhead streams from both distillations are combined, condensed and the condensate formed and passed to the common accumulation zone is divided into a feed portion for the second distillation and a reflux portion for the first distillation. The process consists of: (a) passing the feed to a first distillation zone and therein subjecting same to distillation conditions sufficient to remove a bottoms stream comprising materials present in the feed heavier than the comonomer, a side stream comprising 1-olefin comonomer substantially free of other materials and an overhead vapor stream comprising olefin monomer and hydrocarbon diluent, (b) condensing the overhead vapor stream to form a condensate comprising diluent and monomer and passing the condensate to an accumulation zone, (c) removing condensate from the accumulation zone and passing at least a portion of the condensate as feed to a second distillation zone and passing the remainder of the condensate as reflux to an upper portion of the first distillation zone, (d) subjecting the portion of condensate in the second distillation zone to distillation conditions sufficient to remove a bottoms stream comprising diluent substantially free of olefin monomer, a side stream comprising hydrocarbon diluent and olefin monomer, and an overhead vapor stream comprising hydrocarbon diluent and olefin monomer, and (e) combining the overhead stream in (d) with the overhead stream in (a) prior to condensing in (b) and condensing the combined overhead streams and passing condensate thus formed to the accumulation zone in (b).
- Assignee:
- Phillips Petroleum Co., Bartlesville, OK
- Patent Number(s):
- US 4589957
- OSTI ID:
- 5603756
- 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)
ALKENES
CONDENSATES
DISTILLATION
DISTILLATION EQUIPMENT
EQUIPMENT
HYDROCARBONS
MONOMERS
ORGANIC COMPOUNDS
SEPARATION PROCESSES
VAPOR CONDENSATION