Showa Denko Kabushiki Kaisha

Showa Highpolymer Co., Ltd.

Ryoji Ishioka

Nobuyuki Nagato

Kuniomi Marumo

Norio Kametaka

Kenichiro Maki

Mitsuhiro Imaizumi

Yukio Doi

Tomoe Uematsu

Hideki Mori

Yoshiro Okino

The invention provides a method for producing an aqueous biodegradable polyester dispersion and includes the step of mixing and kneading a molten biodegradable polyester, an aqueous emulsifier solution having a surface tension in terms of 1.0% by weight aqueous solution at 20&deg; C. of 63 mN/m or less, and other additives according to necessity to yield an aqueous dispersion having a solid concentration of 40% by weight or more and a viscosity at 20&deg; C. of 1000 mPa&middot;s or more. The invention can provide a method for producing an aqueous biodegradable polyester dispersion that has a high solid concentration and a high viscosity and is very advantageous in practical use.

Method for producing aqueous biodegradable polyester dispersion

A process for producing epichlorohydrin comprising the steps of:

Process for production of epichlorohydrin

A process for producing an allyl carboxylate comprising the step of reacting propylene, oxygen or oxygen-containing gas, and a lower saturated carboxylic acid in the presence of a catalyst at a temperature of 100.degree. C. to 300.degree. C. and a pressure of 0 to 30 atm (gauge) in a vapor phase. The catalyst is prepared by supporting, on a carrier, at least one alkali metal acetate and at least one bivalent palladium salt in the presence of: (A) at least one organic base selected from the group consisting of (i) aliphatic amines having the formula: ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 may be the same or different and represent hydrogen, or an alkyl group having 1 to 10 carbon atoms or benzyl group optionally substituted with --CN, --OR, --COOR, or a --N(R).sub.2 group wherein R is H or an alkyl group having 1 to 3 carbon atoms, or any two groups of R.sup.1, R.sup.2, and R.sup.3 may together form a ring provided that R.sup.1, R.sup.2, and R.sup.3 are not simultaneously hydrogen; (ii) aromatic amines having the formula: ##STR2## wherein X represent --R, --CN, --OR, --COOR, --NO.sub.2, or --N(R).sub.2 wherein R is the same as defined above, R.sup.2 and R.sup.3 are the same as defined above; and (iii) nitrogen-containing cyclic compounds having the formula: ##STR3## wherein X is the same as defined above; and/or (B) at least one carboxylic acid having the formula:

Process for production of allyl carboxylate

A process for preparing 3-cyanopyridine by the ammoxidation of 2-methyl-5-ethylpyridine which comprises reacting 2-methyl-5-ethylpyridine with ammonia and oxygen in the vapor phase at an elevated temperature, using a specific catalyst consisting of a low-area carrier on which has been deposited vanadium oxide and other specific metal oxides, the reaction being carried out in the copresence of steam.

Process for the preparation of 3-cyanopyridine

A method for the production of nicotinamide or isonicotinamide by catalytically hydrating 3- or 4-cyanopyridine which is characterized in that the hydration reaction is carried out in the presence of a nickel oxide/iron oxide combined catalyst.

Growing community of inventors

Kanagawa, Japan

Ryoji Ishioka