National Institute of Advanced Industrial Science and Technology

Agency of Industrial Science and Technology

Japan Science and Technology Agency

Japan Science and Technology Corporation

Teruyuki Hayashi

Masato Tanaka

Toshiaki Kobayashi

Ikuei Ogata

Yoshikazu Makioka

Yasuziro Kawabata

Li-Biao Han

Poreddy Narsi Reddy

Kouichi Yamaguchi

The invention provides a process by which rare earth metal ions can be efficiently extracted by easy operation, and effective extracting reagents for the process. Specifically, phosphonamides represented by the general formula [1]; a process for producing the same; reagents for extracting rare earth metal ions, containing the phosphonamides; and a process for extraction of rare earth metal ions with the phosphonamides: [1] wherein Ris alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, aryl, aralkyl, or a heterocyclic group, with the proviso that each group may be substituted; Ris hydrogen, alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl, aralkyl, or a heterocyclic group, with the proviso that each group may be substituted; Ris hydrogen, alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl, aralkyl, or a heterocyclic group, with the proviso that each group may be substituted, or the two Rs may be united to form alkylene, cycloalkylene, or arylene. 

Phosphonamides, process for producing the same, and use thereof

A polymer containing in the backbone a 9-oxo-9-phosphafluorene-2,7-diyl skeleton or a combination of the skeleton with a vinylene skeleton or arylene skeleton. The polymer is utilizable as, e.g., a component of a luminescent element or electrochromic element. The polymer is obtained by subjecting a 2,7-dihalo-9-oxo-9-phosphafluorene to polycondensation with dehalogenation, or to reaction with arylenebisboronic acid and polycondensation, or to polycondensation with an olefin.

Polymer containing 9-oxo-9-phosphafluorene-2,7-diyl skeleton in backbone and process for producing the same

Film obtained from silsesquioxane polymer and method of preparing same

Silsesquioxane polymer molding and method of preparing same

A process for the production of a silicon-containing polymer having a main chain of oxygen atoms, organic groups and Si&mdash;H and a process for the production of a silicon-containing polymer having a main chain of oxygen atoms, organic groups and disubstituted silicon atoms are disclosed. The silicon-containing polymer may be produced by dehydrogenative polymerization of quinone and/or diol with trihydrosilane or dihydrosilane in the presence of a palladium-containing catalyst.

Silcon-containing polymers

An organosilicon compound having a Si--C--C--Si bond, a C.dbd.C--Si bond and/or a CH--CH--Si bond is prepared by reacting an olefin or a substituted olefin with a disilane in the presence of a platinum-containing catalyst. The resulting compound can be further treated with an alkyl lithium, an aryl lithium or a Grignard reagent.

Organosilicon compound and process for producing organosilicon compound

An improved hydroformylation process for preparing aldehydes by reacting olefins with synthesis gas (H.sub.2 and CO) under heating and pressure is disclosed. The hydroformylation is carried out in the presence of a platinum catalyst, and assistant composed of a halide of a metal of the group IVb of the Periodic Table and a reaction promotor composed of a specific bidentate ligand of the formula R.sub.2 X-Z-Y-Z-X-R'.sub.2. In this reaction, the platinum catalyst exerts a high activity, and an aldehyde mixture containing a linear isomer at a very high ratio of content is obtained as a product.

Catalyst system for hydroformylation of olefins

An improved hydroformylation process for preparing aldehydes by reacting olefins with synthesis gas (H.sub.2 and CO) under heating and pressure is disclosed. The hydroformylation is carried out in the presence of a platinum catalyst, and assitant composed of a halide of a metal of the group IVb of the Periodic Table and a reaction promotor composed of a specific bidentate ligand of the formula R.sub.2 X--Z--Y--Z--X--R'.sub.2. In this reaction, the platinum catalyst exerts a high activity, and an aldehyde mixture containing a linear isomer at a very high ratio of content is obtained as a product.

Growing community of inventors

Matsudo, Japan

Teruyuki Hayashi