National Institute of Advanced Industrial Science and Technology

Agency of Industrial Science and Technology

Japan As Represented by Secretary of Agency of Industrial Science and Technology

Tsuyoshi Sakaki

Hideki Ohba

Keiko Nishikubo

Masaya Kodama

Imre Sallay

Masao Shibata

Toshihisa Sumi

Toru Ikegami

Katsumi Kamegawa

Yoshio Adachi

Sung Soo Park

Kinya Sakanishi

A method for preparing a carbon microparticle from an organic raw material having lignin as a main constituent, wherein an aqueous solution with 5% total concentration of lignin and sodium hydroxide (the proportion in mass is 1:0.5) is spray-dried to prepare a complex microparticle. This complex microparticle is heat-processed under nitrogen atmosphere at 600&#xb0; C. for one hour and cooled. Thereafter, this is washed with water and further dried to prepare a hollow carbon microparticle such as those shown in FIG.(). The prepared carbon microparticle is light-weight and has an equivalent specific surface area to commercially available activated charcoal.

Carbon microparticle having lignin as raw material and preparation method therefor

Elastic and ultra-lightweight hollow carbon fine particles and a method for producing such hollow carbon fine particles are to be provided. In the method, fine droplets are formed from a mixed solution containing a water soluble organic substance and lithium carbonate; composite fine particles of the water soluble organic substance and the lithium carbonate are prepared by drying the fine droplets formed from the mixed solution; and the composite fine particles are decomposed at a temperature in a range of 500&#xb0; C. to 900&#xb0; C.

Hollow carbon microparticle and method for producing same

Disclosed is an economical method for the preparation of chondroitin sulfates A and C useful as an effective ingredient of medicaments from fish scales as a waste material discharged from fishery in large quantities. Fish scales are enzymatically decomposed in an aqueous medium in the presence of a protease to isolate the chondroitin sulfate compounds and by-product polypeptides followed by removal of the by-product polypeptides from the aqueous solution by a cation-exchange treatment and then the aqueous solution of the chondroitin sulfate compounds is subjected to fractional precipitation by the addition of ethyl alcohol as the precipitant.

Method for the preparation of chondroitin sulfate compounds

Disclosed is an efficient and economical method for the preparation of N-glycolyl neuraminic acid in a high purity from an inexpensive abundant source material. The method comprises dispersing body tissues of an echinodermatous marine animal Cucumaria echinata in an aqueous medium, preferably, using a dry powder of the tissues prepared in advance, in which the tissues are proteolytically decomposed to isolate N-glycolyl neuraminic acid in the form of an aqueous solution containing polypeptides as a by-product, followed by separation of N-glycolyl neuraminic acid from the aqueous solution by removing the polypeptides and purification of the compound in a process utilizing an ion-exchange treatments.

Method for the preparation of N-glycolyl neuraminic acid from Cucumaria

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Tosu, Japan

Tsuyoshi Sakaki