Title:
塩化フタロイルの製造方法
Document Type and Number:
Japanese Patent JP5054898
Kind Code:
B2
Abstract:
Preparation of phthalic acid dichloride (I) comprises reaction of phthalic acid anhydride (II) with phosgene in presence of catalyst (N,N-disubstituted formamide (III)). Preparation of phthalic acid dichloride of formula (I) comprises reaction of phthalic acid anhydride of formula (II) with phosgene in presence of catalyst (N,N-disubstituted formamide (III) of formula (HC(O)-N(R 1>)(R 2>)). R 1>, R 2>1-22C alkyl, 2-22C alkenyl, 3-8C cycloalkyl, 6-10C aryl or 7-12C arylalkyl. Where R 1>, R 2>containing 1-22C alkyl, 2-22C alkenyl amounts to total molecular weight of (III) is at least 269 g/mol. [Image].
Inventors:
Andreas Yop
Application Number:
JP2005144507A
Publication Date:
October 24, 2012
Filing Date:
May 17, 2005
Export Citation:
Assignee:
LANXESS Deutschland Gamebecher
International Classes:
C07C51/60; C07B61/00; C07C63/22; C07C231/02; C07C233/03
Domestic Patent References:
| JP56103131A | ||||
| JP57095948A | ||||
| JP9253501A |
Foreign References:
| US3318950 | ||||
| WO2004022520A1 | ||||
| US3810940 |
Attorney, Agent or Firm:
Patent business corporation Odashima patent office