US1026691A - Process of producing isoprene. - Google Patents

Process of producing isoprene. Download PDF

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Publication number
US1026691A
US1026691A US60944411A US1911609444A US1026691A US 1026691 A US1026691 A US 1026691A US 60944411 A US60944411 A US 60944411A US 1911609444 A US1911609444 A US 1911609444A US 1026691 A US1026691 A US 1026691A
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US
United States
Prior art keywords
producing isoprene
isoprene
isopropenylmethylcarbinol
germany
elberfeld
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 - Lifetime
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US60944411A
Inventor
Georg Merling
Hugo Koehler
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Bayer AG
Original Assignee
Farbenfabriken Vorm Friedr Bayer and Co
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Priority to US60944411A priority Critical patent/US1026691A/en
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms

Definitions

  • isopropenylmethy1-- chlorid anhydrous oxalic acid, etc.
  • the isopropenylmethylcarbinol can be obtained by' heating the ammonium base obtained from 3-methyl-2-oxy-butyldimethylamin:
  • Example 1 1 part of isopropenylmethylcarbinol is heated with 10 part-s of anhydrous oxalic acid in an oil bath to 130150 (1., the isoprene is then condensed in a cooled tube and purified by a fractional distillation.
  • Example 2 Isopropenylmethylcarbinol is conducted into a porcelain tube which is Patented May 21, 1912,

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

i No Drawing.
UNITED STAT S PATENT OFFICE.
GEORG MERLING AND HUGO KiJ HLER, 0F ELBERFELD, GERMANY, ASSIGNORS T0 FARIBENFABRIKEN VORM. FRIEDR. BAYER & 00.,
CORPORATION OF GERMANY.
OF ELBERFELD, GERMANY, A
EROCESS OF PRODUCING ISOPRENE.
Specification of Letters Patent.
Application filed February 18, 1911. Serial No. 609,444.
To all whom it may concern:
Be it known that we, GEORG MERLING and HUoo KoHLnn, doctors of philosophy, chemists, citizens of the German Empire, residing at Elberfeld, Germany, have invented new and useful Improvements in New Process'es of Producing Isoprene, of which the following'is a specification.
We have found that isopropenylmethy1-- chlorid, anhydrous oxalic acid, etc. The isopropenylmethylcarbinol can be obtained by' heating the ammonium base obtained from 3-methyl-2-oxy-butyldimethylamin:
In order to illustrate the new process more fully the following examples are given, the parts being by weight:
Example 1: 1 part of isopropenylmethylcarbinol is heated with 10 part-s of anhydrous oxalic acid in an oil bath to 130150 (1., the isoprene is then condensed in a cooled tube and purified by a fractional distillation.
Example 2: Isopropenylmethylcarbinol is conducted into a porcelain tube which is Patented May 21, 1912,
heated to 130 to 150 C. and which is filled with potassium bisulfate or with native aluminium sesquioxid. The isoprene thus obtained is then condensed and purified as described in Example 1.
We claim t 1. The herein described process for producing isoprene, whichprocess consists in treating isopropenylmethylcarbinol with a dehydrating agent, substantially as described.
2. The herein described process forproducing isoprene, which process consists in treating isopropenylmethylcarbinol with oxalic acid, substantially as described.
In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.
GEORG MERLING. [L. s.] HUGO KGHLER. [L. s.]
'Witnesses:
CHAS. J WRIGHT, ALFRED HENKEL.
US60944411A 1911-02-18 1911-02-18 Process of producing isoprene. Expired - Lifetime US1026691A (en)

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US60944411A US1026691A (en) 1911-02-18 1911-02-18 Process of producing isoprene.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967897A (en) * 1957-11-13 1961-01-10 Monsanto Chemicals Isoprene preparation
US3009005A (en) * 1959-06-12 1961-11-14 Scient Desing Company Inc Chemical process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967897A (en) * 1957-11-13 1961-01-10 Monsanto Chemicals Isoprene preparation
US3009005A (en) * 1959-06-12 1961-11-14 Scient Desing Company Inc Chemical process

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