Trading unit 5 tons/lot
Quotation bits (RMB)/ton
Minimum variable price 2 yuan/ton
The maximum fluctuation range of daily price shall not exceed 4% of the settlement price of the previous trading day.
The contract delivery months are 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,1and 65438+February.
The trading hours are from Monday to Friday (except legal holidays) at 9: 00 am-165438+0: 30 pm and 1: 30-3: 00 pm.
The last trading day is the 10 trading day of the delivery month.
Delivery date: the 12 trading day of the delivery month.
The delivery grade meets the quality standard of industrial purified terephthalic acid SH/T1612.1-2005.
For details, please refer to the delivery rules of purified terephthalic acid in Zhengzhou Commodity Exchange.
Delivery place designated warehouse of the exchange
6% of the minimum trading margin contract value
Delivery method physical delivery
Transaction code TA
Listed Exchange Zhengzhou Commodity Exchange
Purified terephthalic acid (PTA) has a relative molecular weight of 166. 13 and a structural formula of HOOC[C6H4]COOH. It is a white powdery crystal at room temperature, which is non-toxic and flammable. If it is mixed with air within a certain limit, it will burn in case of fire. Polyethylene terephthalate (PET) is obtained by polycondensation of high-purity PTA with ethylene glycol (EG), and can also react with 1, 4- ethylene glycol or 1, 4- cyclohexanedicarboxylic acid to generate the corresponding ester, which is mainly used to produce polyester. Polyester fiber is the most important variety of synthetic fiber, accounting for nearly 80% of the total output of synthetic fiber in the world. In China, the polyester fiber produced from polyester has exceeded 80% of the total synthetic fiber output. In addition, the amount of PTA consumed by polyester in the production of non-fiber products has increased rapidly recently, and the amount of polyester in the non-fiber field has also continued to increase. At present, the products are mainly used for esterification polymerization with ethylene glycol to produce polyester fibers with short polyester chips, which are widely used in textiles. In addition, polyester is also used to produce films, paints and polyester plastics.
The application of PTA is relatively concentrated. More than 90% of PTA in the world is used to produce polyethylene terephthalate, and the rest is used as raw materials for products such as polytrimethylene terephthalate (PTT) and polybutylene terephthalate (PBT).
PTA production process can be divided into two parts: oxidation unit and hydrofining unit. Using acetic acid as solvent, raw material p-xylene is oxidized into crude terephthalic acid by air under the action of catalyst, and then the crude product is obtained by crystallization, filtration and drying in turn. Crude terephthalic acid is hydrogenated to remove impurities, then crystallized, centrifugally separated and dried to obtain PTA products.
Purified terephthalic acid is the main raw material for producing polyester fiber, resin, film and container resin, which is widely used in chemical fiber, container, packaging and film production. The raw material of PTA is xylene, and the raw material of xylene is petroleum. PTA is the raw material of polyester, and polyester is the raw material of polyester, while chemical fiber is 80% polyester, and chemical fiber accounts for 36% of the raw material of textile industry.