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1. WO2002020454 - PROCESS FOR PRODUCING (METH)ACRYLIC ANHYDRIDE AND PROCESS FOR PRODUCING (METH)ACRYLIC ESTER

Publication Number WO/2002/020454
Publication Date 14.03.2002
International Application No. PCT/JP2001/007824
International Filing Date 10.09.2001
Chapter 2 Demand Filed 30.11.2001
IPC
C07C 51/56 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides, or anhydrides
54Preparation of carboxylic acid anhydrides
56from organic acids, their salts, or their esters
C07C 67/08 2006.01
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
08by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
CPC
C07C 2603/74
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
2603Systems containing at least three condensed rings
56Ring systems containing bridged rings
58containing three rings
70containing only six-membered rings
74Adamantanes
C07C 51/56
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
51Preparation of carboxylic acids or their salts, halides or anhydrides
54Preparation of carboxylic acid anhydrides
56from organic acids, their salts, their esters ; or their halides, e.g. by carboxylation
C07C 67/08
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
67Preparation of carboxylic acid esters
08by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
Applicants
  • MITSUBISHI RAYON CO., LTD. [JP]/[JP] (AllExceptUS)
  • MURATA, Naoshi [JP]/[JP] (UsOnly)
  • TAMURA, Kimio [JP]/[JP] (UsOnly)
  • YOSHIDA, Yasukazu [JP]/[JP] (UsOnly)
  • OHKITA, Motomu [JP]/[JP] (UsOnly)
Inventors
  • MURATA, Naoshi
  • TAMURA, Kimio
  • YOSHIDA, Yasukazu
  • OHKITA, Motomu
Agents
  • KANEDA, Nobuyuki
Priority Data
2000-27264708.09.2000JP
2000-27999714.09.2000JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PROCESS FOR PRODUCING (METH)ACRYLIC ANHYDRIDE AND PROCESS FOR PRODUCING (METH)ACRYLIC ESTER
(FR) PROCEDE PRODUCTION D'ANHYDRIDE (METH)ACRYLIQUE ET PROCEDE DE PRODUCTION D'ESTER (METH)ACRYLIQUE
Abstract
(EN)
(Meth)acrylic acid is reacted with a fatty acid anhydride and the resultant reaction mixture is neutralized and washed with an aqueous alkali solution having a pH of 7.5 to 13.5. Thus, high-purity (meth)acrylic anhydride can be industrially advantageously produced while avoiding polymerization. This (meth)acrylic anhydride is reacted with a secondary or tertiary alcohol in the presence of a basic compound which in 25°C water has an acidity (pKa) of 11 or lower. Thus, a high-purity (meth)acrylic ester can be produced in high yield.
(FR)
Dans la présente invention, on fait réagir de l'acide (méth)acrylique avec un anhydride d'acide gras puis on neutralise le mélange de réaction résultant qu'on lave avec une solution alcaline aqueuse dont le pH se situe entre 7,5 et 13,5. De cette manière, on produit avantageusement à un niveau industriel de l'anhydride (méth)acrylique de grande pureté tout en évitant la polymérisation. On fait réagir cet anhydride (méth)acrylique avec un alcool secondaire ou tertiaire en présence d'un composé basique qui, dans de l'eau à 25 °C présente une acidité (pKa) inférieure ou égale à 11. On peut ainsi produire avec un rendement élevé un ester (méth)acrylique de grande pureté.
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