1. SUPPLY 5000MT/Month
2. Good resource from domestic factory
3. Factory price
4. Purified Terephthalic Acid
5. ISO 9001:2008
Purified Terephthalic Acid
Formula: C8H6O4
purity: > 99%
Description: White needle crystal or powder
Purified Terephthalic Acid
Formula: C8H6O4
Description: White needle crystal or powder
Uses : As a reagent for alkali in wool , additive to poultry feeds.
Chemical and physical properties
Combustibility: Flammable
Toxicity : Low toxicity
Density : 1.510 g/cm3
Sublimation : 402 °C ( Under natural pressure)
Melting point: 425 °C (in a gland )
Solubility : dissolving in hot grain alcohol , not dissolving in water, aether , glacial acetic acid and chloroform.
PTA Specification:
Test Item
|
Specification
|
|
PTA Content%
|
99%
|
|
Metal(Fe, Mo, Cr, Ti, Mn, Ni, Co)ppm≤
|
≤4ppm
|
|
Moisture %≤
|
≤0.5%
|
|
Fe ppm≤
|
2ppm
|
|
DMF Chroma. 5%Liquor< APHA>
|
10
|
|
4-CBA ppm≤
|
≤25ppm
|
|
Acid Num(mg KOH/g)
|
675±2
|
Package and storage
Storage : Keep container closed when not in use, Store in a cool, dry, well-ventilated area away from strong oxidizing substances.
Package : Pocket by measured or pocket in tank car
Preparation
High temp. Oxidation: While acetic acid as solvent, Co, Mn, Br admixture as catalyzer p-xylene will oxidate into crude terephthalic acid < CTA>. Under certain temperature and pressure. Then CTA dissolve into water under high temperature and pressure. And passa Pd/C catalyzer settled vessel which is a reactor where the oxidation production will be hydrogenated in order to removeimpurity(4-CBA). Afterward. The hydrogenation production will become the final production(PTA) after crystallizing filtrating P-Tol acid and drying.
