GB802072A - Process for the preparation of ªŠ-caprolactam from adipic diamide - Google Patents

Process for the preparation of ªŠ-caprolactam from adipic diamide

Info

Publication number
GB802072A
GB802072A GB14366/57A GB1436657A GB802072A GB 802072 A GB802072 A GB 802072A GB 14366/57 A GB14366/57 A GB 14366/57A GB 1436657 A GB1436657 A GB 1436657A GB 802072 A GB802072 A GB 802072A
Authority
GB
United Kingdom
Prior art keywords
diamide
ethers
adipic
hydrogenating
caprolactam
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
GB14366/57A
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.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
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 Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Publication of GB802072A publication Critical patent/GB802072A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/02—Preparation of lactams
    • C07D201/08—Preparation of lactams from carboxylic acids or derivatives thereof, e.g. hydroxy carboxylic acids, lactones or nitriles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0201—Impregnation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)

Abstract

A composite catalyst having a hydrogenating and dehydrating action, used for the preparation of e -caprolactam from adipic diamide (see Group IV (b)), comprises compounds containing one or more hydrogenating components on a support acting as a dehydrating agent, e.g. iron, nickel, or cobalt on aluminium oxide, silicon oxide, boric acid or phosphoric acid. In examples, the catalyst is (1) a mixture of Co : Ni : SiO2 in the ratio 60 : 5 : 35, and (2) a mixture of Co : Ni : Ao2O3 in the ratio of 70 : 2 : 28.ALSO:e -Caprolactam is prepared from adipic diamide in the presence of ammonia, hydrogen and a composite catalyst having a hydrogenating and dehydrating action, by reacting the components in a solvent at elevated temperatures up to 200 DEG C. and elevated pressures up to 200 atmospheres. Preferred conditions are a pressure of 30-170 atmospheres, and a temperature of 150-190 DEG C.; the minimum pressure should be higher than the vapour pressure of the solvent at the temperature of operation. Preferred solvents are ethers having a boilingpoint above 50 DEG C. at normal pressure; examples are the higher aliphatic ethers such as dipropyl or dibutyl ether; or cycloaliphatic ethers such as dioxane or tetrahydrofuran. Mixtures of the ethers may be used, or mixtures of the ethers with saturated hydrocarbons. The catalyst is preferably a mixed compound containing one or more hydrogenating components on a support acting as a dehydrating agent, e.g. iron, nickel or cobalt on aluminium oxide, silicon oxide, boric acid or phosphoric acid (see Group III). Instead of adipic diamide, adipic acid or its diamide-forming derivatives, such as esters, may be used, the ammonia concentration being increased so that the diamide may be formed during the reaction. Solvents are removed by fractional distillation. The process may be carried out batchwise or continuously.
GB14366/57A 1956-05-28 1957-05-06 Process for the preparation of ªŠ-caprolactam from adipic diamide Expired GB802072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH802072X 1956-05-28

Publications (1)

Publication Number Publication Date
GB802072A true GB802072A (en) 1958-10-01

Family

ID=4537729

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14366/57A Expired GB802072A (en) 1956-05-28 1957-05-06 Process for the preparation of ªŠ-caprolactam from adipic diamide

Country Status (1)

Country Link
GB (1) GB802072A (en)

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