As a basic chemical raw material, xylene is widely used, involving all walks of life such as: boyamak, ink, cleaning, synthesis and so on. Most of them are used in coating, reçine, dye, ink and other industries as solvents; Used in medicine, patlayıcılar, pesticides and other industries as synthetic monomer or solvent; It can also be used as a high-octane gasoline component and is an important raw material for organic chemical industry. It can also be used to remove asphalt from the car body. The pathology department of the hospital is mainly used for the transparency and dewaxing of tissues and sections.
Ksilen has three isomers, namely o-xylene, m-xylene and p-xylene, which have similar physical and chemical properties. The xylene that we come into contact with in our work is actually “mixed xylene”, yani, a mixture of several substances, in addition to the three isomers mentioned above, there is another substance called “ethyl benzene”.
O-xylene produces phthalic anhydride, which is the raw material for manufacturing plasticizers, alkyd resins, unsaturated polyester resins, vesaire. Most of the m-xylene isomerized to p-xylene, can also be oxidized to m-phthalic acid, instead of phthalic anhydride as the raw material of unsaturated polyester and alkyd resin. The largest amount of xylene is p-xylene (PX), p-xylene oxidation to produce terephthalic acid (PTA), esterified by ethylene glycol (EG) to ethylene terephthalate (PET), which is the raw material for the production of polyester fiber and film.
PX aynı zamanda benzini harmanlamak için veya solvent olarak ve farmasötik ara maddelerin üretiminde hammadde olarak da kullanılır., kokular, mürekkepler, vesaire. Öyleyse, Petrol piyasasının gücünün PX piyasası üzerinde büyük etkisi var.
Şu anda, Çin'in paraksilen üretim tesisleri çoğunlukla Çin'de inşa edilmiştir. 2019, böylece teknolojik ilerlemenin getirilerini daha büyük ölçüde absorbe ettiler.
Şimdi, Çin'deki paraksilen tesisleri arasında, dan fazla büyük kurulumlar 1 milyon ton/yıl hesabı 84%. Bunlar büyük ölçekli, entegre yeni üniteler paraksilenin yerli üretim maliyetini büyük ölçüde azalttı, ve aynı zamanda aromatik hammaddelerin mevcut küresel kıtlığı altında yurt içi paraksilen kapasite kullanım oranının yüksek kalmasını sağladı.
