GB794618A - Pyridine purification process - Google Patents

Pyridine purification process

Info

Publication number
GB794618A
GB794618A GB708656A GB708656A GB794618A GB 794618 A GB794618 A GB 794618A GB 708656 A GB708656 A GB 708656A GB 708656 A GB708656 A GB 708656A GB 794618 A GB794618 A GB 794618A
Authority
GB
United Kingdom
Prior art keywords
pyridine
crude
alkali metal
distillation
residue
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
GB708656A
Inventor
John Dell Bower
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.)
Distillers Co Yeast Ltd
Distillers Co Ltd
Original Assignee
Distillers Co Yeast Ltd
Distillers 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
Application filed by Distillers Co Yeast Ltd, Distillers Co Ltd filed Critical Distillers Co Yeast Ltd
Priority to GB708656A priority Critical patent/GB794618A/en
Publication of GB794618A publication Critical patent/GB794618A/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

Landscapes

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

Abstract

794,618. Purification of pyridine. DISTILLERS CO., Ltd. Feb. 13, 1957 [March 7, 1956], No. 7086/56. Class 2 (3). Crude pyridine produced by the vapour-phase reaction between formaldehyde, acetaldehyde and ammonia is purified by a process comprising heating the crude pyridine at an elevated temperature with an aqueous solution of an alkali metal hydroxide, distilling the resulting mixture to remove a distillate containing the impurities present in the crude pyridine and recovering the pyridine from the distillation residue. The pyridine is preferably recovered by azeotropic distillation, for example by cooling the residue, adding a suitable azeotroping agent, which is preferably benzene, refluxing the mixture until the conditions in the distillation column have reached equilibrium and separately collecting the several fractions of distillate obtained on gradually increasing the temperature. The preferred alkali metal hydroxides are sodium and potassium hydroxides.
GB708656A 1956-03-07 1956-03-07 Pyridine purification process Expired GB794618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB708656A GB794618A (en) 1956-03-07 1956-03-07 Pyridine purification process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB708656A GB794618A (en) 1956-03-07 1956-03-07 Pyridine purification process

Publications (1)

Publication Number Publication Date
GB794618A true GB794618A (en) 1958-05-07

Family

ID=9826346

Family Applications (1)

Application Number Title Priority Date Filing Date
GB708656A Expired GB794618A (en) 1956-03-07 1956-03-07 Pyridine purification process

Country Status (1)

Country Link
GB (1) GB794618A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339594A2 (en) * 1988-04-27 1989-11-02 Nepera, Inc. Preparation of UV grade synthetic pyridine
CN102603616A (en) * 2012-03-27 2012-07-25 济南圣泉唐和唐生物科技有限公司 Method for refining pyridine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0339594A2 (en) * 1988-04-27 1989-11-02 Nepera, Inc. Preparation of UV grade synthetic pyridine
EP0339594A3 (en) * 1988-04-27 1991-04-03 Nepera, Inc. Preparation of uv grade synthetic pyridine
CN102603616A (en) * 2012-03-27 2012-07-25 济南圣泉唐和唐生物科技有限公司 Method for refining pyridine
CN102603616B (en) * 2012-03-27 2014-04-16 济南卡博唐生物科技有限公司 Method for refining pyridine

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