GB790937A - Process for the recovery of cyanopyridines - Google Patents

Process for the recovery of cyanopyridines

Info

Publication number
GB790937A
GB790937A GB2419155A GB2419155A GB790937A GB 790937 A GB790937 A GB 790937A GB 2419155 A GB2419155 A GB 2419155A GB 2419155 A GB2419155 A GB 2419155A GB 790937 A GB790937 A GB 790937A
Authority
GB
United Kingdom
Prior art keywords
solution
cyanopyridines
cyanopyridine
scrubbed
temperature
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
GB2419155A
Inventor
David James Hadley
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 GB2419155A priority Critical patent/GB790937A/en
Publication of GB790937A publication Critical patent/GB790937A/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
    • C07D213/60—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 with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals

Abstract

3- and 4-cyanopyridines are recovered from hot gaseous mixtures (e.g. from oxidation of picolines in presence of ammonia) by conducting the mixture at 100 DEG C. or more into a scrubbing device where it is scrubbed with an aqueous solution of the reaction products under such conditions that the scrubbed gas leaves at a temperature not above 35 DEG C. and the aqueous solution is not saturated with cyanopyridine; the solution is then conducted into a separate device where it is cooled to deposit the cyanopyridine; after separation the solution is recycled to the scrubbing device. Under preferred condition the scrubbed gas leaves at about 25 DEG C. and the solution at least 5 DEG C. above saturation point. The temperature in the separating device is about 5-15 DEG C. Examples are given of the process and suitable apparatus is illustrated. The Provisional Specification refers to cyanopyridines in general.
GB2419155A 1955-08-23 1955-08-23 Process for the recovery of cyanopyridines Expired GB790937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2419155A GB790937A (en) 1955-08-23 1955-08-23 Process for the recovery of cyanopyridines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2419155A GB790937A (en) 1955-08-23 1955-08-23 Process for the recovery of cyanopyridines

Publications (1)

Publication Number Publication Date
GB790937A true GB790937A (en) 1958-02-19

Family

ID=10207831

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2419155A Expired GB790937A (en) 1955-08-23 1955-08-23 Process for the recovery of cyanopyridines

Country Status (1)

Country Link
GB (1) GB790937A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008021836A1 (en) * 2006-08-08 2008-02-21 Dow Agrosciences Llc Process for quenching gaseous reaction product containing cyanopyridine
WO2011045015A1 (en) * 2009-10-16 2011-04-21 Lonza Ltd Methods and devices for the production of aqueous solutions of cyanopyridines
EP2319833A1 (en) * 2009-10-16 2011-05-11 Lonza Ltd. Methods and devices for the production of aqueous solutions of cyanopyridines
CN110746352A (en) * 2019-11-11 2020-02-04 安徽瑞邦生物科技有限公司 Method for separating 4-cyanopyridine by solvent cooling crystallization

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008021836A1 (en) * 2006-08-08 2008-02-21 Dow Agrosciences Llc Process for quenching gaseous reaction product containing cyanopyridine
CN101528701B (en) * 2006-08-08 2011-10-19 陶氏益农公司 Process for quenching gaseous reaction product containing cyanopyridine
US8008314B2 (en) 2006-08-08 2011-08-30 Dow Agrosciences Llc Method of recovering cyanopyridines
EP2319834A1 (en) * 2009-10-16 2011-05-11 Lonza Ltd. Methods and devices for the production of aqueous solutions of cyanopyridines
WO2011045003A3 (en) * 2009-10-16 2011-06-16 Lonza Ltd Methods and devices for the production of cyanopyridines
EP2319833A1 (en) * 2009-10-16 2011-05-11 Lonza Ltd. Methods and devices for the production of aqueous solutions of cyanopyridines
WO2011045015A1 (en) * 2009-10-16 2011-04-21 Lonza Ltd Methods and devices for the production of aqueous solutions of cyanopyridines
CN102648181A (en) * 2009-10-16 2012-08-22 隆萨有限公司 Methods and devices for the production of aqueous solutions of cyanopyridines
EA020358B1 (en) * 2009-10-16 2014-10-30 Лонца Лтд. Methods and devices for the production of cyanopyridines
EA020721B1 (en) * 2009-10-16 2015-01-30 Лонца Лтд. Method and device for the production of aqueous solutions of cyanopyridines
US9155977B2 (en) 2009-10-16 2015-10-13 Lonza Ltd. Devices for the production of cyanopyridines
CN102648181B (en) * 2009-10-16 2015-11-25 隆萨有限公司 For the production of the method and apparatus of the cyanopyridine aqueous solution
CN110746352A (en) * 2019-11-11 2020-02-04 安徽瑞邦生物科技有限公司 Method for separating 4-cyanopyridine by solvent cooling crystallization
CN110746352B (en) * 2019-11-11 2023-03-14 安徽瑞邦生物科技有限公司 Method for separating 4-cyanopyridine by solvent cooling crystallization

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