GB742643A - Improvements in the synthesis of nitrogenous bases - Google Patents

Improvements in the synthesis of nitrogenous bases

Info

Publication number
GB742643A
GB742643A GB1991751A GB1991751A GB742643A GB 742643 A GB742643 A GB 742643A GB 1991751 A GB1991751 A GB 1991751A GB 1991751 A GB1991751 A GB 1991751A GB 742643 A GB742643 A GB 742643A
Authority
GB
United Kingdom
Prior art keywords
pyridine
acetaldehyde
earth
formaldehyde
heated
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
GB1991751A
Inventor
Peter Lenton Bradshaw
Deric William Parkes
Ian Alastair Moncrieff Ford
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.)
ROBINSON BROS Ltd
Robinson Brothers Ltd
Original Assignee
ROBINSON BROS Ltd
Robinson Brothers 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
Application filed by ROBINSON BROS Ltd, Robinson Brothers Ltd filed Critical ROBINSON BROS Ltd
Priority to GB1991751A priority Critical patent/GB742643A/en
Publication of GB742643A publication Critical patent/GB742643A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C07D213/08—Preparation by ring-closure

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pyridine Compounds (AREA)

Abstract

Pyridine and 3-picoline are produced by heating one of the following mixtures in the molecular ratios indicated in the presence of an alumina-silica catalyst, the molecular ratios of the aldehydes being maintained by introducing additional aldehyde to the reaction zone to compensate for any loss due to decomposition:- <FORM:0742643/IV(a)/1> It is desirable to use excess ammonia as a diluent. Methylal may be used instead of formaldehyde and the acetaldehyde may conveniently be used in the form of paraldehyde. The preferred catalyst is a natural alumina-silica such as fuller's earth having an acidic reaction. In the examples: (a) methylal and acetaldehyde are heated in the presence of activated fuller's earth to give pyridine-type bases from which pyridine is separated; (b) formaldehyde and acetaldehyde are heated in the presence of activated fuller's earth to give pyridine-type bases from which pyridine is separated; (c) formaldehyde, acetaldehyde and ammonia are heated in the presence of activated fuller's earth to give pyridine-type bases from which 3-picoline is separated.
GB1991751A 1951-08-23 1951-08-23 Improvements in the synthesis of nitrogenous bases Expired GB742643A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1991751A GB742643A (en) 1951-08-23 1951-08-23 Improvements in the synthesis of nitrogenous bases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1991751A GB742643A (en) 1951-08-23 1951-08-23 Improvements in the synthesis of nitrogenous bases

Publications (1)

Publication Number Publication Date
GB742643A true GB742643A (en) 1955-12-30

Family

ID=10137295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1991751A Expired GB742643A (en) 1951-08-23 1951-08-23 Improvements in the synthesis of nitrogenous bases

Country Status (1)

Country Link
GB (1) GB742643A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3272825A (en) * 1962-12-13 1966-09-13 Koei Chemical Co Method of producing pyridine
US3284456A (en) * 1966-11-08 Method of producing pyridine, z-picoline and x-picoline
DE1255661B (en) * 1957-06-06 1967-12-07 Reilly Tar & Chem Corp Continuous process for the production of pyridine and 3-picoline
US3381011A (en) * 1965-01-28 1968-04-30 Distillers Co Yeast Ltd Pyridine production
US3417092A (en) * 1962-10-05 1968-12-17 Mitsubishi Gas Chemical Co Method for producing pyridine
JPS4886874A (en) * 1972-02-28 1973-11-15
US3932421A (en) * 1967-07-13 1976-01-13 Koei Chemical Company, Ltd. Process for producing alkylpyridines
US4866179A (en) * 1988-06-06 1989-09-12 Dairen Chemical Corporation Process for the manufacture of pyridine in high yield and selectivity during a prolonged period of operation

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284456A (en) * 1966-11-08 Method of producing pyridine, z-picoline and x-picoline
DE1255661B (en) * 1957-06-06 1967-12-07 Reilly Tar & Chem Corp Continuous process for the production of pyridine and 3-picoline
US3417092A (en) * 1962-10-05 1968-12-17 Mitsubishi Gas Chemical Co Method for producing pyridine
US3272825A (en) * 1962-12-13 1966-09-13 Koei Chemical Co Method of producing pyridine
US3381011A (en) * 1965-01-28 1968-04-30 Distillers Co Yeast Ltd Pyridine production
US3932421A (en) * 1967-07-13 1976-01-13 Koei Chemical Company, Ltd. Process for producing alkylpyridines
JPS4886874A (en) * 1972-02-28 1973-11-15
JPS5411316B2 (en) * 1972-02-28 1979-05-14
US4866179A (en) * 1988-06-06 1989-09-12 Dairen Chemical Corporation Process for the manufacture of pyridine in high yield and selectivity during a prolonged period of operation

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