ポリオキシメチレンジメチルエーテルの製造方法

Title:

ポリオキシメチレンジメチルエーテルの製造方法

Document Type and Number:

Japanese Patent JP2008517960

Kind Code:

A

Abstract:

A process for preparing polyoxymethylene dimethyl ether of the formula H₃CO(CH₂O)_nCH₃ where n=2-10, in which methylal and trioxane are fed into a reactor and reacted in the presence of an acidic catalyst, wherein the amount of water introduced into the reaction mixture by methylal, trioxane and/or the catalyst is <1% by weight based on the reaction mixture. Preferably, a fraction comprising polyoxymethylene dimethyl ether where n=3 and 4 is obtained by distillation from the reaction mixture, and methylal, trioxane and polyoxymethylene dimethyl ether where n<3 and optionally n>4 are recycled into the reaction.

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Inventors:

Heiner Schelling
Eckhart Stroefer
Rolf Pincos
Andrea Hownat
Gert-Dieter Tebben
Hans Hasse
Sergey Bragov

Application Number:

JP2007538306A

Publication Date:

May 29, 2008

Filing Date:

October 19, 2005

Export Citation:

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Assignee:

BASF SE

International Classes:

C07C41/14; C07C41/42; C07C43/10; C07B61/00

Domestic Patent References:

JPS4740772B1
JPS523362B1	1977-01-27

Foreign References:

EP1070755A1	2001-01-24
GB603872A	1948-06-24

Attorney, Agent or Firm:

Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Hiroshi Sugimoto
Einzel Felix-Reinhard
Reinhard Einsel

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