[EN] SYNTHESIS OF 1-HYDROXYETHYL FORMAMIDES AND N-VINYL FORMAMIDES<br/>[FR] SYNTHÈSE DE 1-HYDROXYÉTHYLFORMAMIDES ET DE N-VINYLFORMAMIDES
申请人:TAMINCO BVBA
公开号:WO2018041615A1
公开(公告)日:2018-03-08
Processes and systems for producing N-vinyl carboxylic acid amides are provided herein. According to some aspects of the present invention, a process for producing an N-vinyl carboxylic acid amide is described that eliminates interim solids handling steps during formation of the intermediate compounds, thereby increasing efficiency and reducing cost. The processes and system described herein may be used for the synthesis of N-vinylformamide and its intermediates, including 1-hydroxyethylformamide and 1- alkoxyethylformamide, or for the synthesis of N-methyl,N-vinylformamide and its intermediates, including N-methyl,1-hydroxyethylformamide and N- methyl,1alkoxyethylformamide.
Disclosed herein is a process for producing N-substituted formamide represented by the formula: ##STR1## wherein R represents a hydrogen atom or a residual radical of a primary or secondary alcohol, comprising the steps of reacting formamide with acetaldehyde in the presence of a basic catalyst and if required, further reacting the thus formed product, N-(.alpha.-hydroxyethyl)formamide, with a primary or secondary alcohol in the presence of an acid catalyst.
PRODUCTION METHOD FOR N-(ALPHA-HYDROXYETHYL)FORMAMIDE, PRODUCTION METHOD FOR N-(ALPHA-ALKOXYETHYL)FORMAMIDE, PRODUCTION DEVICE FOR N-(ALPHA-HYDROXYETHYL)FORMAMIDE, AND PRODUCTION DEVICE FOR N-(ALPHA-ALKOXYETHYL)FORMAMIDE
申请人:Mitsubishi Chemical Corporation
公开号:US20190241502A1
公开(公告)日:2019-08-08
Provided is a production method for N-(α-hydroxyethyl) formamide, having a step (1) in which a basic catalyst stored in a catalyst supply device and formamide are mixed in a mixing tank; and a step (2) in which the formamide mixed with the basic catalyst is brought in contact with acetaldehyde and N-(α-hydroxyethyl) formamide is obtained. In step (1), at least part of the catalyst supply device is vibrated while the basic catalyst is supplied to the mixing tank.
METHOD FOR PRODUCING N-(ALPHA-ALKOXYETHYL)FORMAMIDE
申请人:Mitsubishi Chemical Corporation
公开号:US20190135735A1
公开(公告)日:2019-05-09
Provided are a method for producing N-(α-alkoxyethyl)formamide, comprising adding an acid catalyst to the mixed liquid within 3 hours from start of mixing after mixing of N-(α-hydroxyethyl)formamide with an alcohol has been started, by which the N-(α-alkoxyethyl)formamide can be produced at a high yield without additional investment in plant and equipment while suppressing an increase in the temperature of the mixed liquid and preventing corrosion of a pipe; and a method for producing N-(α-alkoxyethyl)formamide, comprising degassing carbon dioxide in the reaction of N-(α-hydroxyethyl)formamide with an alcohol, by which the N-(α-alkoxyethyl)formamide having a decreased carbonate concentration can be produced.
METHOD FOR PRODUCING N-(ALPHA-HYDROXYETHYL)FORMAMIDE AND METHOD FOR PRODUCING N-VINYLFORMAMIDE
申请人:Mitsubishi Chemical Corporation
公开号:US20190315678A1
公开(公告)日:2019-10-17
A method for producing N-(α-hydroxyethyl)formamide which comprises reacting formamide with acetaldehyde in a solvent in the presence of a basic catalyst in a reaction vessel, precipitating the obtained N-(α-hydroxyethyl)formamide in the reaction vessel, and collecting the precipitated N-(α-hydroxyethyl)formamide from the reaction vessel. The production of N-(α-hydroxyethyl)formamide is conducted multiple times using the same reaction vessel so that an (n+1)th reaction is conducted in the reaction vessel in which crystals of the N-(α-hydroxyethyl)formamide obtained in the n-th reaction are present (n is a natural number).