Industrial Technology Research Institute

Labeltek Inc.

Taiwan Salt Industrial Corporation

Chyuan Juang

Shyue-Ming Jang

Hom-Ti Lee

Po-Han Huang

Chien-Shiun Liao

Ling Lu

Chen-Hsi Cheng

Long-Shuenn Jean

I-Min Tseng

Tung-Ying Kuo

Jih-Chen Huang

Tz-Bang Du

Kuan-Chieh Tseng

Bang-I Liou

Long-Shuen Jean

Chun-Liang Lai

Hsien-Chueh Pi

Chia-Hung Yeh

Charng-Lih Jeng

Yuan-Szu Chang

A high pressure extraction apparatus and extracting method therefor are adapted to maintain a medium at the supercritical state to extract substance-to-be-extracted. The apparatus includes an extraction tank, a piston and a control unit. The control unit controls the piston to reciprocate in the extraction tank as well as controls the pressure of the extract space of the tank, feeding of the substance, discharge of extract, and discharge of leftover. Accordingly, the apparatus performs a continuous supercritical extraction.

High-pressure extraction apparatus and method

A method for preparing three types of benzidine compounds in a specific ratio, the method uses two types of diphenylamine compounds and one type of biphenyldihalide compound in a specific ratio as reactants to mix with an organic solvent and an additive to synthesize benzidine compounds in one step. The synthesized three types of benzidine compounds specially perform in a designated mixturing ratio having excellent photoelectric characteristics for a charge transporting layer in an organic photo-conductive drum.

Method for preparing three types of benzidine compounds in a specific ratio

The present invention provides a novel poly(1,3-propylene terephthalate), which is prepared from reacting terephthalic acid and 1,3-propanediol in the presence of an effective catalytic amount of ethylene glycol titanate to undergo esterification to form a monomer; and polymerizing the monomer in the presence of an effective catalytic amount of antimony acetate to obtain poly(1,3-propylene terephthalate). The obtained poly(1,3-propylene terephthalate) (PPT) has an intrinsic viscosity (IV) of 0.65-0.91 dl/g, acid number (--COOH amount) of less than 40 meq/kg, and L*&gt;60. Without adding a pigment, the yellowness b* of PPT is below 9, even below 5. The yellowness b* of PPT even reaches below 3 when a pigment is incorporated.

Poly(1,3-propylene therephthalate)

Growing community of inventors

Hsinchu, Taiwan

Chyuan Juang