GB825021A - Unsaturated aldehydes - Google Patents

Unsaturated aldehydes

Info

Publication number
GB825021A
GB825021A GB14657/57A GB1465757A GB825021A GB 825021 A GB825021 A GB 825021A GB 14657/57 A GB14657/57 A GB 14657/57A GB 1465757 A GB1465757 A GB 1465757A GB 825021 A GB825021 A GB 825021A
Authority
GB
United Kingdom
Prior art keywords
salt
aldehyde
reaction zone
continuously
unsaturated aldehyde
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
GB14657/57A
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.)
Celanese Corp
Original Assignee
Celanese Corp
Celanese Corp of America
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 Celanese Corp, Celanese Corp of America filed Critical Celanese Corp
Publication of GB825021A publication Critical patent/GB825021A/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
    • C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
    • C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
    • C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
    • C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
    • C07C45/75—Reactions with formaldehyde

Abstract

An unsaturated aldehyde is produced from formaldehyde, an aldehyde containing at least 3 carbon atoms and a salt of a secondary amine by feeding the aldehydes, amine salt and water to a reaction zone at superatmospheric pressure and at a temperature in the range 90 DEG to 120 DEG C., maintaining the reactants in the zone until at least 90% of the higher aldehyde is converted to the Mannich base salt, feeding the mixture thus produced continuously into a second reaction zone at an elevated temperature sufficiently high to decompose the Mannich base salt to form an unsaturated aldehyde and an aqueous solution of the amine salt, boiling the reaction mixture to drive off the unsaturated aldehyde continuously, and continuously recycling the aqueous amine salt to the first reaction zone. The process is of particular importance in the production of methacrolein starting from formaldehyde, propionaldehyde and dimethylamine hydrochloride, which may be represented as follows:- <FORM:0825021/IV (b)/1>
GB14657/57A 1956-05-09 1957-05-08 Unsaturated aldehydes Expired GB825021A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US825021XA 1956-05-09 1956-05-09

Publications (1)

Publication Number Publication Date
GB825021A true GB825021A (en) 1959-12-09

Family

ID=22171616

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14657/57A Expired GB825021A (en) 1956-05-09 1957-05-08 Unsaturated aldehydes

Country Status (1)

Country Link
GB (1) GB825021A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015065610A1 (en) * 2013-10-28 2015-05-07 Rohm And Haas Company Process for separating methacrolein

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015065610A1 (en) * 2013-10-28 2015-05-07 Rohm And Haas Company Process for separating methacrolein
KR20160078367A (en) * 2013-10-28 2016-07-04 롬 앤드 하아스 컴패니 Process for separating methacrolein
JP2016538259A (en) * 2013-10-28 2016-12-08 ローム アンド ハース カンパニーＲｏｈｍ Ａｎｄ Ｈａａｓ Ｃｏｍｐａｎｙ Method for separating methacrolein
US9765007B2 (en) 2013-10-28 2017-09-19 Rohm And Haas Company Dehydration process
KR102291247B1 (en) 2013-10-28 2021-08-20 롬 앤드 하아스 컴패니 Process for separating methacrolein

Similar Documents

Publication Publication Date Title
GB825021A (en) Unsaturated aldehydes
GB640492A (en) Improvements in or relating to methods of preparing aminoketones or their reduction products or salts thereof
GB811659A (en) Process for producing derivatives of 1-aryl-3-amino propanol-1
GB679014A (en) Improvements in and relating to the production of amines
GB1122034A (en) Process for the preparation of azines
GB684781A (en) Improvements in or relating to methods of preparing aminoketones and reduction products thereof
GB1018187A (en) Improvements in or relating to methods of producing 2,6-dichlorobenzonitrile
ES433483A1 (en) Process for the production of neohesperidine dihydrochalcone
GB1039535A (en) Beta-amino-arylethylketone picrates
GB829838A (en) Improved process for the manufacture of 2:2-dipyridyl
GB1092632A (en) Improved process for the production of n-methylol formamide
GB566006A (en) Improvements in or relating to the production of alpha-chloro, beta-hydroxynitriles
GB787061A (en) Process for producing n-methyl--a-phenylsuccinimide
GB987433A (en) Process for the manufacture of tetracyclic compounds
GB573120A (en) Process for the manufacture of alkylated phenyl-isopropyl-amines
GB814152A (en) Improvements in or relating to tertiary amines and their salts and the production thereof
GB667107A (en) Improvements in or relating to the preparation of a new unsaturated carbinol
GB788349A (en) Process for the synthesis of 1-bromo-4-chlorobutane
GB704978A (en) Manufacture of new hydantoin compounds
GB961645A (en) Process for the production of 1,1-dimethylol cyclohex-3-ene
GB736488A (en) Process for the preparation of an unsaturated aldehyde
GB605999A (en) Process for the production of coumarins
Červinka et al. Asymmetric transformation as a means for determination of absolute configuration of acid with an asymmetric carbon atom in the α-position
GB774934A (en) Process for the production of 2-methyl-butanol-(1)-one(3)
GB749214A (en) Compounds useful in the synthesis of norprogesterones and method for the production thereof