Method for producing aromatic polyether, and potassium carbonate used in same
AssigneeIdemitsu Kosan Co., Ltd.
InventorsKoichi Suga, Minoru Senga, Hiromu Kumagai, Yuko Murakami
Life of this patent
Estimating the term…
Abstract
Provided is a method for producing an aromatic polyether, comprising reacting 4,4′-dichlorobenzophenone and hydroquinone in the presence of a potassium carbonate satisfying at least one of the following conditions (A) and (B): (A) the potassium carbonate has a bulk density of 1.2 g/ml or less; and (B) an average particle diameter D (μm) and a specific surface area S (m2/g) of the potassium carbonate satisfy D/S≤600.
Claims6
A method for producing an aromatic polyether, comprising reacting 4,4′-dichlorobenzophenone and hydroquinone in the presence of a potassium carbonate satisfying the following conditions (A) and (B):
- (A) the potassium carbonate has a bulk density of 1.2 g/ml or less;
- and
- (B) an average particle diameter D (m) and a specific surface area S (m2/g) of the potassium carbonate satisfy D/S≤600, wherein the potassium carbonate is the only alkali metal salt used in the reaction, and a combined concentration of 4,4′-dichlorobenzophenone and hydroquinone in a solvent is 1.5 mol/1 to 4.0 mol/l.
Dependencies are inferred from the claim text.