PTA is Pure Terephthalic Acid (Pure Terephthalic Acid) abbreviation, is one of the important bulk organic raw materials, its main use is the production of polyester fiber (polyester), polyester bottles and polyester film, widely used in all aspects of the national economy with chemical fibers, light industry, electronics, construction and other aspects of the people's living standards are closely related to the level of the people.
PTA (PTA) in 2005 China's demand for 12.1 million tons, accounting for 28.8 million tons of the total global demand for PTA, 42%; production of 5.6 million tons, imports of 6.5 million tons, the degree of dependence on imports of 54%, the future demand for PTA is still expanding, in the next few years, PTA's supply and demand in China is still difficult to reach a complete balance.
EG (ethylene glycol) demand amounted to 510.2 million tons, accounting for 45% of the total global demand for EG 11.33 million tons, production of 1.1 million tons, imports of 4 million tons. 2005 China's polyester production accounted for 38% of the world's production of polyester, has become China's textile industry's most important raw material. China's movement, caused by the rest of the world's countries and regions of concern, and will have a considerable impact on the world chemical fiber industry.
The application of PTA is relatively concentrated, more than 90% of the world's PTA is used in the production of polyethylene terephthalate (PET, referred to as polyester), the other part is used as a polypropylene terephthalate (PTT) and polybutylene terephthalate (PBT) and the raw material for other products.
China's polyester production of the world's first, is a veritable polyester country. Polyester production capacity, although still at a 2-digit rate of increase, but the first 2 years of economic efficiency fell sharply. The main reason is that PTA and EG prices remain high, and polyester product prices are low, enterprise profit space is getting smaller and smaller. Domestic self-sufficiency rate of these 2 raw materials are less than 40%.
In the past 4 years, the domestic PTA project has become a hot spot, several large projects have been put into production, but did not ease the situation of oversupply. By 2010, PTA projects in the demand and interest-driven, there will be a period of rapid development.
PTA production process technology, but also in the construction of some development. The introduction of a variety of PTA production process in recent years, especially low-temperature oxidation of EPTA process, comparison and evaluation, will be able to more comprehensive understanding of the technical characteristics of the various existing PTA process.
Expanded Information: Basic Use PTA is one of the important bulk organic raw materials, widely used in all aspects of the national economy with chemical fibers, light industry, electronics, construction and so on. At the same time, the application of PTA and more concentrated, more than 90% of the world's PTA for the production of polyethylene terephthalate (referred to as polyester, PET). Producing 1 ton of PET requires 0.85-0.86 tons of PTA and 0.33-0.34 tons of MEG (ethylene glycol). Polyester includes fiber chips, polyester fibers, bottle chips and film chips. In the domestic market, 75% of PTA is used in the production of polyester fiber; 20% is used in the production of bottle-grade polyester, which is mainly used in the packaging of various beverages, especially carbonated drinks. 5% for film-grade polyester, mainly used in packaging materials, film and tape. It can be seen that the downstream extension of PTA is mainly polyester fiber. Polyester fiber, commonly known as polyester. In the chemical fiber belongs to the synthetic fiber. Synthetic fiber manufacturing industry is the largest chemical fiber industry, the most branches of the sub-industry, in addition to polyester, its products also include acrylic, nylon, spandex, etc. In 2005, China's chemical fiber production 16.29 million tons, accounting for 37% of the world's total output of 44 million tons. Synthetic fiber production accounted for 92% of the total chemical fiber, and polyester fiber accounted for 85% of the synthetic fiber. Polyester is divided into filament and staple fiber, filament accounts for about 62%, staple fiber accounts for about 38%. Filament and staple fiber production method has two kinds: one is PTA and MEG to produce a slice, with the slice melting and then sprayed into the silk; one is PTA and MEG in the production process does not produce a slice, but directly sprayed into the silk. Polyester can be used to make special materials such as bulletproof vests, seat belts, tire cord, fishing nets, ropes, filter cloth and insulation materials and so on. But its main use is as a textile raw materials. Domestic textile raw materials, cotton and chemical fiber accounted for 90% of the total. China's chemical fiber production ranks first in the world, in 2005, chemical fiber production accounted for China's textile industry fiber processing total of 26.9 million tons of 61%. The chemical fiber polyester accounted for nearly 80% of the total chemical fiber. Therefore, polyester is the main raw material for the textile industry. Polyester filament for textile enterprises used to produce chemical fiber cloth, polyester staple fiber is generally blended with cotton. Cotton yarn generally accounts for 60% of the textile raw material, polyester accounts for 30-35%, however, the amount of both due to price changes and substitution. Simply put, the raw material of PTA is PX, the source is oil. Polyester with PTA accounted for 75% of the total, while 78% of the chemical fiber for polyester. This is the "chemical fiber raw material PTA" said the origin. Baidu Encyclopedia - Purified Terephthalic Acid (PTA)