Akita University

Other

Dowa Holdings Co., Ltd.

Fumio Hamada

Yoshihiko Kondo

Chun-Bin Li

Manabu Yamada

Shingo Kato

Masahiro Ishizuka

Sotaro Miyano

Setsuko Miyanari

Hitoshi Kumagai

Nobuhiko Iki

Yoshihiro Sugawa

Mitsuharu Hasegawa

Atsushi Shibayama

Mitsuhiro Akama

Takanori Imai

Toyohisa Fujimoto

Yoshiyuki Hiraishi

A compound represented by General Formula (1) below, 

Compound, metal extractant, and application of the same

The present invention is to provide a novel rare metal extractant containing a cyclic phenol sulfide derivative of the formula (1) and a method for extractive separation of rare metal(s) using the rare metal extractant with high efficiency. 

Rare metal extractant

The present invention provides a rare metal/platinum-group metal extractant, which has a completely new structure compared with the conventional rare metal/platinum-group metal extractant and which exhibits excellent extraction performance; it also provides a method for extracting rare metals and platinum-group metals using the extractant. The rare metal/platinum-group metal extractants of the present invention is the one to extract rare metals and platinum-group metals by contacting a solution, in which several kinds of rare metals and platinum-group metals are dissolved, with a solution in which a cyclic phenol sulfide of the following Formula (1) is dissolved to make the rare metals and platinum-group metals move into the cyclic phenol sulfide solution. 

Rare metal/platinum-group metal extractant and method for extracting rare metals and platinum-group metals

SULFONATED DERIVATIVES OF CYCLIC PHENOL SULFIDES, PROCESS FOR THE PREPARATION THEREOF, SEPARATING AND RECOVERING AGENTS CONTAINING CYCLIC PHENOL SULFIDES, METHODS FOR SEPARATION AND RECOVERY THEREWITH, AND DRUG COMPOSITIONS CONTAINING THE SULFIDES

An umbrella cover for covering a closed umbrella is provided. The umbrella cover comprises a cylindrical roll of a spirally wound strip which may be elongated by axially pulling out the outer end of the the wound strip. The inner end of the wound strip is secured to the ferrule of the umbrella. The strip has formed therein a plurality of parallel slits extending at a predetermined tilt angle in relation to the longitudinal axis of the strip, and a plurality lips which have a configuration capable of engaging with the slit. The strip is wound such that the lip in one turn of the spirally wound strip is engaged with the slit in the adjacent turn of the wound strip so that the lip can slide along the slit upon elongation of the cylindrical roll, and such an engagement of the lips in the slit prevents the wound strip from being excessively pulled out. The strip may comprise two overlaid film tapes each having the slits or the lips formed therein, or one film tape having the both.

Umbrella cover comprising extensible cylindrical roll

Growing community of inventors

Akita, Japan

Fumio Hamada