GB887908A - A process for the purification of isoprene - Google Patents

A process for the purification of isoprene

Info

Publication number
GB887908A
GB887908A GB37143/60A GB3714360A GB887908A GB 887908 A GB887908 A GB 887908A GB 37143/60 A GB37143/60 A GB 37143/60A GB 3714360 A GB3714360 A GB 3714360A GB 887908 A GB887908 A GB 887908A
Authority
GB
United Kingdom
Prior art keywords
isoprene
weight
cyclopentadiene
less
maleic anhydride
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
GB37143/60A
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of GB887908A publication Critical patent/GB887908A/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
    • C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
    • C07C7/14875—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound with organic compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (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 containing less than 2% of its weight of cyclopentadiene is purified by reacting with at least 1 mol of maleic anhydride per mol of cyclopentadiene at less than 50 DEG C. and separating the adduct formed. The isoprene may be concentrated, e.g. containing 95%-99% by weight or in dilute solution containing 10%-20% by weight of isoprene. The maleic amhydride is added in solution, e.g. in benzene or acetone containing 20%-30% by weight of the anhydride, or by passing the isoprene through a bed of solid maleic anhydride at a temperature sufficient to dissolve the required amount, e.g. 25 DEG C.-40 DEG C. After sufficient time to form the adduct this is removed by washing with aqueous alkali and water or by distillation. The process preferably reduces the cyclopentadiene concentration to below 20 p.p.m.
GB37143/60A 1959-10-30 1960-10-28 A process for the purification of isoprene Expired GB887908A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US887908XA 1959-10-30 1959-10-30

Publications (1)

Publication Number Publication Date
GB887908A true GB887908A (en) 1962-01-24

Family

ID=22213493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37143/60A Expired GB887908A (en) 1959-10-30 1960-10-28 A process for the purification of isoprene

Country Status (1)

Country Link
GB (1) GB887908A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511649B1 (en) * 1971-04-15 1980-03-26

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511649B1 (en) * 1971-04-15 1980-03-26

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