GB1072687A - A process for obtaining isoprene from c-fractions - Google Patents

A process for obtaining isoprene from c-fractions

Info

Publication number
GB1072687A
GB1072687A GB5070663A GB5070663A GB1072687A GB 1072687 A GB1072687 A GB 1072687A GB 5070663 A GB5070663 A GB 5070663A GB 5070663 A GB5070663 A GB 5070663A GB 1072687 A GB1072687 A GB 1072687A
Authority
GB
United Kingdom
Prior art keywords
column
fraction
isoprene
solvent
fractions
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
GB5070663A
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.)
Bayer AG
Erdoelchemie GmbH
Original Assignee
Bayer AG
Erdoelchemie GmbH
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 Bayer AG, Erdoelchemie GmbH filed Critical Bayer AG
Publication of GB1072687A publication Critical patent/GB1072687A/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
    • C07C7/04—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

Isoprene is recovered from C5 fractions also containing cyclopentadiene and cis- and trans-pentadiene-1,3 and minor amounts of cyclopentane, cyclopentene and acetylenes, by extractive distillation using N-methypyrrolidone as solvent. A C5 fraction obtained from pyrolysis of benzene is separated in separator 2 into a pentane-pentene fraction 3 and a diene <PICT:1072687/C4-C5/1> fraction 4 which is introduced in vapour form into column A. Solvent preferably containing 5-15% of water is introduced through pipe 5. Isoprene containing cyclopentane and/or cyclopentene is obtained overhead and distilled in column B to obtain pure isoprene in line 7. A cyclopentadiene fraction is recovered as vapour a few plates above the sump of column A and solvent is purified in column C to remove residual hydrocarbons before recycle.
GB5070663A 1962-12-22 1963-12-23 A process for obtaining isoprene from c-fractions Expired GB1072687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE24077A DE1183071B (en) 1962-12-22 1962-12-22 Process for the recovery of ioprene from C fractions

Publications (1)

Publication Number Publication Date
GB1072687A true GB1072687A (en) 1967-06-21

Family

ID=7071241

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5070663A Expired GB1072687A (en) 1962-12-22 1963-12-23 A process for obtaining isoprene from c-fractions

Country Status (2)

Country Link
DE (1) DE1183071B (en)
GB (1) GB1072687A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686349A (en) * 1968-08-23 1972-08-22 Bayer Ag Process for recovering cyclopentene, isoprene and a diolefin stream from the c{11 -cut obtained by petroleum cracking
CN1055281C (en) * 1996-03-20 2000-08-09 中国石油化工总公司 Method for separation of petroleum cracking C5 fraction by liquid phase feeding extraction rectification
WO2016097999A1 (en) 2014-12-18 2016-06-23 Sabic Global Technologies B.V. Isoprene extraction with preserved c5 feedstock
CN109988055A (en) * 2017-12-29 2019-07-09 抚顺齐隆化工有限公司 A kind of preparation method of high-purity cyclopentadiene and methyl cyclopentadiene

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3686349A (en) * 1968-08-23 1972-08-22 Bayer Ag Process for recovering cyclopentene, isoprene and a diolefin stream from the c{11 -cut obtained by petroleum cracking
CN1055281C (en) * 1996-03-20 2000-08-09 中国石油化工总公司 Method for separation of petroleum cracking C5 fraction by liquid phase feeding extraction rectification
WO2016097999A1 (en) 2014-12-18 2016-06-23 Sabic Global Technologies B.V. Isoprene extraction with preserved c5 feedstock
US10065907B2 (en) 2014-12-18 2018-09-04 Sabic Global Technologies B.V. Isoprene extraction with preserved C5 feedstock
CN109988055A (en) * 2017-12-29 2019-07-09 抚顺齐隆化工有限公司 A kind of preparation method of high-purity cyclopentadiene and methyl cyclopentadiene

Also Published As

Publication number Publication date
DE1183071B (en) 1964-12-10

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