The Special Relationship Between The Development Of Titanium Industry And PTA Industry
PTA, also known as refined terephthalic acid, is the most used basic chemical raw material. Mainly used in the production of polyester products. The use of polyester can be divided into two categories: “fiber” and “non-fiber”. Fibers are mainly used in the textile industry, and non-fibers are mainly used in industries such as films, containers, insulation materials, and engineering plastics. They can be used for a wide range of purposes. My country is the world's largest producer and consumer of PTA, accounting for about 56% of the world.In the case of a very serious epidemic abroad, our country's dependence on foreign PTA has been further reduced in recent years. This has also prompted the development of the domestic PTA industry, and the use of titanium materials and titanium equipment has grown rapidly.
Due to the corrosive environment of the PTA device and the excellent corrosion resistance of titanium alloy, titanium alloy has become the material of choice for PTA devices. It can resist corrosion in various corrosive environments of PTA devices.In PTA devices, titanium is mainly used for protection in the form of: titanium-lined and all-titanium equipment. The titanium-lined equipment is made of the outer carbon steel to bear the pressure of the medium, and the titanium-lined equipment is made to resist the corrosion of the medium.All-titanium parts are completely made of titanium to bear the corrosion and pressure of the medium.
The main parts of titanium used in PTA are oxidation unit, crystallization unit, and solvent recovery unit. The most severely corroded environment of the oxidation unit is the oxidation reactor and the stage 3 condenser at the top. Therefore, all equipment in contact with the process medium here is made of titanium. The most severely corroded environment of the crystallization unit is the crystallizer and the condenser at the top. The equipment in this place is made of titanium alloy materials that meet the performance. The pipes and trays in the reboiler of the dehydration tower greater than 120 degrees in the solvent recovery unit use related grades of titanium alloy material equipment.
It can be seen that titanium is very useful in PTA equipment, and the amount is very large. Therefore, when the domestic epidemic was serious in the first two years, the titanium industry still maintained a relatively rapid development, which is inextricably linked to the rapid development of the domestic PTA industry.
