Sumitomo Chemical Company, Limited

Tadashi Fukunaka

Nozomi Ishihara

Shinji Ohtomo

Yi Zhang

A powder supply method for causing a powder supplied from a top endof a tubeto flow down within the tubeand be discharged from a bottom endof the tube, in which if M [kg/s] is a supply flow rate of the powder and A[m] is a cross-sectional area of the bottom endof the tube, the following expression is satisfied.1.5≤()≤135

Powder supply method and production method for thermoplastic resin composition

A powder storage apparatusincludes: a containerhaving a powder inletA, a powder outletA, and a gas outletB; and a tubeconnected to the powder inletA. If A[m] is a cross-sectional area of a cross section perpendicular to an axis of the tubeat a bottom endof the tubeand A[m] is a cross-sectional area of the gas outletB, the following expression is satisfied.<4.

Powder storage apparatus, melt kneader, powder storage method, and production method for thermoplastic resin composition

A method is provided for producing a liquid crystal polyester including: (1) polycondensing a mixture of a compound of formula (I) with a compound of formula (II) in a polymerization tank at 260 to 350&#xb0; C. to form a prepolymer, wherein a ratio of by-products to be distilled off to the theoretical amount of by-products formed when the compound of formula (I) is polycondensed with the compound of formula (II) in a stoichiometric relation is 95% or more; (2) continuously discharging the prepolymer from the polymerization tank in a molten state, solidifying the prepolymer while transferring, and continuously grinding the solidified prepolymer by a grinder provided downstream in a transfer direction to produce prepolymer particles; and (3) heat-treating the prepolymer particles in their solid state under an inert gas atmosphere, thereby subjecting them to solid phase polymerization.

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Niihama, Japan

Tadashi Fukunaka