NL7800344A - Inhibiting polymerisation of conjugated diene in polar solvents - at high temps., by addn. of an aliphatic tert. mercaptan as polymerisation inhibitor - Google Patents

Inhibiting polymerisation of conjugated diene in polar solvents - at high temps., by addn. of an aliphatic tert. mercaptan as polymerisation inhibitor

Info

Publication number
NL7800344A
NL7800344A NL7800344A NL7800344A NL7800344A NL 7800344 A NL7800344 A NL 7800344A NL 7800344 A NL7800344 A NL 7800344A NL 7800344 A NL7800344 A NL 7800344A NL 7800344 A NL7800344 A NL 7800344A
Authority
NL
Netherlands
Prior art keywords
polymerisation
polar solvents
mercaptan
tert
addn
Prior art date
Application number
NL7800344A
Other languages
Dutch (nl)
Other versions
NL162351B (en
NL162351C (en
Original Assignee
Japanese Geon Co Ltd
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
Priority claimed from NL6805773.A external-priority patent/NL159358B/en
Application filed by Japanese Geon Co Ltd filed Critical Japanese Geon Co Ltd
Priority to NL7800344.A priority Critical patent/NL162351C/en
Publication of NL7800344A publication Critical patent/NL7800344A/en
Publication of NL162351B publication Critical patent/NL162351B/en
Application granted granted Critical
Publication of NL162351C publication Critical patent/NL162351C/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/20—Use of additives, e.g. for stabilisation

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

The tendency of conjugated dienes such as butadiene, isoprene, 1,3-pentadiene, etc. to polymerise in polar solvents at elevated temps. is reduced by incorporating an aliphatic tert. mercaptan (I) as polymerisation inhibitor. Process is esp. useful for preventing polymerisation of the raw materials during extractive distn. of C4 or C5 hydrocarbon streams using polar solvents such as DMF, N-methylpyrrolidone, acetonitrile or acetone. Suitable inhibitors (I) have the formula: CH3(CH2)n-C(CH3)2SH where n = 1-10. (I) are used e.g. at 0.01-10 wt.% on the solvent, opt. together with known inhibitors such as NaNO2, methylene blue, sulphur, tert. butyl catechol, beta-naphthylamine, furfural, benzaldehyde or aromatic nitro cpds. (I) give improved inhibition of conjugated dienes at elevated temps. in the presence of polar solvents, even in the presence of acetylene cpds. and satd. hydrocarbons.
NL7800344.A 1967-04-26 1978-01-11 METHOD FOR REDUCING THE TENDING OF A CONJUGGED DIE TO POLYMERIZE IN A POLAR SOLVENT. NL162351C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7800344.A NL162351C (en) 1967-04-26 1978-01-11 METHOD FOR REDUCING THE TENDING OF A CONJUGGED DIE TO POLYMERIZE IN A POLAR SOLVENT.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2624367 1967-04-26
NL6805773.A NL159358B (en) 1967-04-26 1968-04-24 METHOD OF REDUCING THE TENDENCE OF A CONJUGATED DIES TO POLYMERIZE.
NL7800344.A NL162351C (en) 1967-04-26 1978-01-11 METHOD FOR REDUCING THE TENDING OF A CONJUGGED DIE TO POLYMERIZE IN A POLAR SOLVENT.

Publications (3)

Publication Number Publication Date
NL7800344A true NL7800344A (en) 1978-04-28
NL162351B NL162351B (en) 1979-12-17
NL162351C NL162351C (en) 1980-05-16

Family

ID=26363984

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7800344.A NL162351C (en) 1967-04-26 1978-01-11 METHOD FOR REDUCING THE TENDING OF A CONJUGGED DIE TO POLYMERIZE IN A POLAR SOLVENT.

Country Status (1)

Country Link
NL (1) NL162351C (en)

Also Published As

Publication number Publication date
NL162351B (en) 1979-12-17
NL162351C (en) 1980-05-16

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Legal Events

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V1 Lapsed because of non-payment of the annual fee