GB396568A - An improved process of and apparatus for the production of ketens by pyrolysis - Google Patents

An improved process of and apparatus for the production of ketens by pyrolysis

Info

Publication number
GB396568A
GB396568A GB25208/32A GB2520832A GB396568A GB 396568 A GB396568 A GB 396568A GB 25208/32 A GB25208/32 A GB 25208/32A GB 2520832 A GB2520832 A GB 2520832A GB 396568 A GB396568 A GB 396568A
Authority
GB
United Kingdom
Prior art keywords
molten material
pipe
ketene
heat
exchanger
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
GB25208/32A
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.)
Standard Oil Development Co
Original Assignee
Standard Oil Development Co
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 Standard Oil Development Co filed Critical Standard Oil Development Co
Publication of GB396568A publication Critical patent/GB396568A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/87—Preparation of ketenes or dimeric ketenes
    • C07C45/88—Preparation of ketenes or dimeric ketenes from ketones
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/87—Preparation of ketenes or dimeric ketenes
    • C07C45/89—Preparation of ketenes or dimeric ketenes from carboxylic acids, their anhydrides, esters or halides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

Ketenes are obtained by passing a material capable of producing a ketene by pyrolysis, such as an aliphatic ketone or a secondary alcohol, through a mass of molten material at a temperature between 600-900 DEG C. The molten material may comprise lead, aluminium, an <PICT:0396568/IV/1> alloy of aluminium, zinc and lead or a fused salt such as copper chloride, lead chloride, sodium borate, or mixtures thereof or any other liquid stable in the above temperature range which will not volatilize appreciably. According to the arrangement shown, the organic compound is passed through a heat-exchanger 3 and injected in the form of a spray into a body of molten material 6 in a reaction chamber 5. The chamber 5 is preferably lined with non-catalytic material such as fireclay, cement or asbestos, and the portion of the pipe 4 inside the reaction chamber is preferably lined inside and outside in a similar manner. The ketene produced passes out through pipe 23 and heat-exchanger 3. The molten material is maintained at the required temperature by circulation through a heating coil 12, either by means of a pump 9 or natural connection. Fresh molten material is introduced through pipe 14 either directly or via the heating coil 12. Any unreacted material is returned to the process after cooling. Suitable starting materials are acetone and isopropyl alcohol and acetic ketene, ethyl ketene and propyl ketene may be produced. The Specification as open to inspection under Sect. 91 comprises carrying out pyrogenetic reactions in general in a process similar to that described above. This subject-matter does not appear in the Specification as accepted.ALSO:The Specification as open to inspection under Sect. 91 comprises carrying out pyrogenetic reactions by passing the raw material through a molten material enclosed in a reaction zone of enlarged cross section, and circulating the molten material through a narrow heating zone to supply the heat necessary for the reaction. According to the arrangement shown, the raw <PICT:0396568/III/1> material is passed through a heat-exchanger 3 and injected in the form of a spray into a body of molten material 6 in a reaction chamber 5. The chamber 5 is preferably lined with non-catalytic material such as fire-clay, cement or asbestos, and the portion of the pipe 4 inside the reaction chamber is preferably lined inside and outside in a similar manner. The product passes out through pipe 23 and heat-exchanger 3. The molten material is maintained at the required temperature by circulation through a heating coil 12, either by means of a pump 9 or natural convection. Fresh molten material is introduced through pipe 14 either directly or via the heating coil 12. This subject-matter does not appear in the Specification as accepted.
GB25208/32A 1931-10-17 1932-09-09 An improved process of and apparatus for the production of ketens by pyrolysis Expired GB396568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US396568XA 1931-10-17 1931-10-17

Publications (1)

Publication Number Publication Date
GB396568A true GB396568A (en) 1933-08-10

Family

ID=21906646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25208/32A Expired GB396568A (en) 1931-10-17 1932-09-09 An improved process of and apparatus for the production of ketens by pyrolysis

Country Status (2)

Country Link
FR (1) FR742985A (en)
GB (1) GB396568A (en)

Also Published As

Publication number Publication date
FR742985A (en) 1933-03-21

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