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Title:
ジアルキルカーボネート合成に使用した失活触媒を回収および再生するプロセス
Document Type and Number:
Japanese Patent JP6717849
Kind Code:
B6
Abstract:
The present invention discloses a process for recovery and regeneration of rare earth metals or salts thereof used as catalyst and which is conveniently integrated within the overall flow sheets of manufacturing dialkyl carbonates. Alkyl carbamate, alcohol and a rare earth metal salt as catalyst selected from the lanthanide series are added in a reactor to afford dialkyl carbonate. The rare earth metal catalyst is selected from samarium, cerium, lanthanum, neodymium, ytterbium, europium and gadolinium. Ammonia is added to a portion of the reaction mixture to precipitate the catalyst and the separated deactivated catalyst is dissolved in acid to afford regenerated catalyst, e.g., in triflic acid in the case of samarium triflate catalyst.

Inventors:
ヴィヴェク・ヴィナヤク・ラナデ
アシュトーシュ・アナント・ケルカール
ヴィラス・ハリ・レイン
アニル・キサン・キナーゲ
サヴィタ・キラン・シンゴート
ラリッタ・サンジブ・ロイ
ダナンジェイ・ラヴィンドラ・モート
Application Number:
JP2017550577A
Publication Date:
August 05, 2020
Filing Date:
March 23, 2016
Export Citation:
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Assignee:
カウンシル オブ サイエンティフィック アンド インダストリアル リサーチ
International Classes:
B01J38/60; B01J31/40; B01J38/62; B01J38/66; B01J38/68; C07C69/96