purified terephthalic acid PTA powder
|FOB Price:||US $540 / Ton|
|Min. Order:||10 Tons|
|Min. Order||FOB Price|
|10 Tons||US $540/ Ton|
|Payment Terms:||L/C, T/T, Western Union|
- Model NO.: PTA powder
- Alkyl No.: Unsaturated Acid
- Source: Hydrolysis
- Acid Strength: Strong Acid
- grade: industrial grade
- Kind: Inorganic Acid
- Element: Polyatomic Acid
- Other name: PTA
- Transport Package: 25kg/bag
- Origin: China
- Carboxyl No.: Dicarboxylic Acid
- Appearance: Powder
- Colour: White
- Volatility: Volatile Acid
- Mf: C8h6o4
- Oxidation: Non Oxidizing Acid
- Stability: Stabilized Acid
- Trademark: sf
- Specification: industrial grade
- HS Code: 2917361100
This product is a white crystal or powder at room temperature.Its spontaneous combustion point 680 ºC, flash point of 384 ~ 421 ºC,sublimation heat 98.4 kJ/mol,heat of combustion 3225.9kJ/mol,density of 1.55 g/cm3.Soluble in alkaline solution,slightly soluble in hot ethanol,insoluble in water,ethyl ether,glacial acetic acid and chloroform.Note:avoid contact with skin and eyes.
2. Production methods
With p-xylene as raw materials,liquid phase oxidation produce crude terephthalic acid,then through hydrotr
eating,crystallization,separation,drying,purified terephthalic acid (pta).
3. PTA production process
The lower end of the PTA for oil products.Oil after a certain process to produce light gasoline (alias) naphtha,derived from naphtha MX(mixed xylene),then extracted PX(paraxylene).Formula PTA PX(65%- 67%)
as raw material,acetic acid as solvent,the catalyst under the action of oxidized by air (oxygen makes up about 35% to 33%),crude terephthalic acid is generated.And then to hydrofining of crude terephthalic acid, remove impurities,then through crystallization,separation,drying,made of benzene dicarboxylic acid products, namely the PTA product.
4. Product properties
Product Name:Terephthalic Acid
Description:White needle crystal or powder
Uses: As a reagent for alkali in wool,additive to poultry feeds.
Chemical and physical properties
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.
It's physical properties include resistance to extreme heat,water,and abrasions as well insulating against
electricity.It is mainly used for polyester related product like filament yarn,staple fiber,audio & video film
,and PET Bottles.
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 oxid
ation production will be hydrogenated in order to removeimpurity(4-CBA).Afterward.the hydrogenati on prod
uction will become the final production(PTA) after crystallizing filtrating P-Tol acid and drying.
7. Packaging Detail
1) Big-bags of 1000kg (23MT per 20ft container).
2) Big-bags of 1100kg (23MT per 20ft container).
3) Bulk container (up to 25MT per 20ft container) or as the customer's request.
8. 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
9. Specification of Pure Terephthalic Acid PTA
|Acidity (Mg of KOH/gm)||675 ± 2|
|Moisture (wt %)||0.2 max|
|Ashes (ppm)||7 max|
|4 Carboxybenzaldehyde (ppm)||20 max|
|Color (APHA)||10 max|
|Iron (ppm)||0.5 max|
|Para Toluic Acid (ppm)||120 max|
|Total metals Fe, Mn, Co, Cr, Ni, Mo, Ti (ppm)||2 max|
|Δ Y||10 max|