GB1137268A - Process for recovering highly pure isoprene - Google Patents

Process for recovering highly pure isoprene

Info

Publication number
GB1137268A
GB1137268A GB49221/66A GB4922166A GB1137268A GB 1137268 A GB1137268 A GB 1137268A GB 49221/66 A GB49221/66 A GB 49221/66A GB 4922166 A GB4922166 A GB 4922166A GB 1137268 A GB1137268 A GB 1137268A
Authority
GB
United Kingdom
Prior art keywords
isoprene
diolefin
fraction
distilling
boiling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB49221/66A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Gas Chemical Co Inc
Original Assignee
Japan Gas Chemical Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Japan Gas Chemical Co Inc filed Critical Japan Gas Chemical Co Inc
Publication of GB1137268A publication Critical patent/GB1137268A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/005—Processes comprising at least two steps in series
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/04—Purification; Separation; Use of additives by distillation
    • C07C7/05—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds
    • C07C7/08—Purification; Separation; Use of additives by distillation with the aid of auxiliary compounds by extractive distillation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,137,268. Recovering isoprene; isopentane. JAPAN GAS-CHEMICAL CO. Inc. 2 Nov., 1966 [17 Nov., 1965; 2 May, 1966], No. 49221/66. Heading C5E. A C 5 hydrocarbon fraction containing C 5 paraffins, mono-olefins, di-olefins and acetylenes, and possibly a fraction boiling above C 5 (e.g. a C 5 cut from a naphtha thermal cracking process), is treated to recover polymerization grade isoprene by a process comprising the following steps:- (a) Heating to dimerize cyclopentadiene; (b) Distilling to remove components boiling higher than 55‹ C., including cyclopentadiene dimer; (c) Distilling the fraction remaining from (b) to remove components boiling below isoprene (mainly isopentane and including acetylenic impurities) ; (d) Extractively distilling the residue from (c) to obtain a diolefin fraction, suitable solvents being #-methoxypropionitrile (preferred), acetonitrile (which may contain a small amount of water), dimethyl formamide, and dimethyl acetamide; (e) Boiling off the selective solvent from the diolefin extract, and optionally washing the diolefin mixture obtained with water; and (f) Separating isoprene from the diolefin mixture by rectification. The process may be carried out at atmospheric or superatmospheric pressure. Isoprene of at least 99.8% purity may be recovered.
GB49221/66A 1965-11-17 1966-11-02 Process for recovering highly pure isoprene Expired GB1137268A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7071165 1965-11-17
JP2780666 1966-05-02

Publications (1)

Publication Number Publication Date
GB1137268A true GB1137268A (en) 1968-12-18

Family

ID=26365783

Family Applications (1)

Application Number Title Priority Date Filing Date
GB49221/66A Expired GB1137268A (en) 1965-11-17 1966-11-02 Process for recovering highly pure isoprene

Country Status (3)

Country Link
US (1) US3436437A (en)
FR (1) FR1499798A (en)
GB (1) GB1137268A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647344A (en) * 1983-10-21 1987-03-03 Basf Aktiengesellschaft Recovery of isoprene from a C5 -hydrocarbon mixture

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898135A (en) * 1971-07-23 1975-08-05 Petro Tex Chem Corp Extractive distillation of C{HD 4 {B hydrocarbons using a three component solvent system
US3860512A (en) * 1974-01-10 1975-01-14 Exxon Research Engineering Co Solvent extraction of aromatic hydrocarbons with 1,2,3-tris-(2-cyanoethoxy)-propane
CN108430957A (en) * 2015-12-14 2018-08-21 沙特基础工业全球技术公司 The method and system of bicyclopentadiene is recycled by cracking gas
EP3585760A1 (en) * 2017-05-10 2020-01-01 SABIC Global Technologies B.V. Systems and methods for isoprene purification

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768224A (en) * 1956-10-23 Isoprene concentrates
US2704778A (en) * 1955-03-22 Adtio
US2426705A (en) * 1942-12-29 1947-09-02 Standard Oil Dev Co Recovery of isoprene by fractionation and extractive distillation
US2361493A (en) * 1943-02-03 1944-10-31 Standard Oil Dev Co Separation and purification of hydrocarbons
US2407997A (en) * 1943-08-17 1946-09-24 Standard Oil Dev Co Separation and purification of isoprene
US2441827A (en) * 1943-10-27 1948-05-18 Union Oil Co Extraction process
US2459403A (en) * 1944-07-20 1949-01-18 Standard Oil Dev Co Segregation of c5 hydrocarbons by extractive and azeotropic distillation
US2851505A (en) * 1956-05-03 1958-09-09 Gulf Research Development Co Purification of isoprene
DE1163795B (en) * 1961-11-24 1964-02-27 Basf Ag Process for the removal of small amounts of high molecular weight acetylenes and allenes from conjugated diolefins
BE672305A (en) * 1962-05-18
GB983783A (en) * 1963-10-25 1965-02-17 Shell Int Research Process for the removal of alkynes from hydrocarbon mixtures containing alkadienes
GB1093413A (en) * 1964-11-06 1967-11-29 Internat Synthetic Rubber Comp Separation of hydrocarbons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647344A (en) * 1983-10-21 1987-03-03 Basf Aktiengesellschaft Recovery of isoprene from a C5 -hydrocarbon mixture

Also Published As

Publication number Publication date
DE1568895A1 (en) 1970-09-10
US3436437A (en) 1969-04-01
FR1499798A (en) 1967-10-27
DE1568895B2 (en) 1976-03-04

Similar Documents

Publication Publication Date Title
US3230157A (en) Isoprene purification process
GB1148100A (en) Process for the separation of conjugated diolefins
US4277313A (en) Recovery of 1,3-butadiene
GB1410773A (en) Hydrocarbon separation process
US3851010A (en) Process for the separation of isoprene
GB1195648A (en) Isoprene Purification Process
US3242227A (en) Process for the separation of conjugated diolefines from allenes and acetylenes
US3860496A (en) Process for the recovery of isoprene from mixtures containing the same
ES305223A1 (en) High purity alkadienes by extractive distillation
GB1227510A (en)
US2704778A (en) Adtio
GB1281073A (en) Process for recovering cyclopentene, isoprene, and a diolefin stream from the c5-cut obtained by petroleum cracking
GB1137268A (en) Process for recovering highly pure isoprene
SU466650A3 (en) Method for separating diolefin hydrocarbons
US2971036A (en) Recovery of isoprene by fractionation and extractive distillation
US3795588A (en) Process for separating hydrocarbon mixtures comprising paraffins,mono-olefins,diolefins and small amounts of more highly unsaturated hydro-carbons by extractive distillation
US3012947A (en) Recovery of high purity isoprene from light steam cracked distillate
US3953300A (en) Process for separating a high purity vinyl aromatic hydrocarbon from hydrocarbon mixtures containing the same
US3038016A (en) Isoprene separation
JPS57123123A (en) Preparation of high purity butadiene
US4140587A (en) Process for the separation of diolefins from mixtures containing the same
US3265591A (en) Separation of butadiene from butenes by distilling in the presence of an aqueous solution of silver salts
US2388913A (en) Separating acetylenes from light hydrocarbons
JPS5653625A (en) Recovery of 1,3-butadiene
US2376426A (en) Process for preparing diolefins