PP-B is a widely used raw material for the production of chemicals, mainly used in the manufacture of various plastic products. The following is the manufacturing method of PP-B:
I. Preparation of raw materials
1. Propylene: The main raw material of PP-B is propylene, a simple olefin compound. Propylene can be obtained through petroleum cracking or natural gas processing, etc.
2. Catalyst: In order to facilitate the production of polypropylene, a catalyst is required. Common catalysts include titanium-based catalysts and magnesium-based catalysts.
3. Auxiliaries: Some auxiliaries, such as antioxidants, anti-ultraviolet agents, plasticizers, etc., can be added according to the needs of product properties.
II. Polymerization reaction
1. Add propylene, catalyst and additives to the polymerization reactor in a certain proportion.
2. At a certain temperature and pressure, the catalyst will induce the propylene molecules to undergo a polymerization reaction to produce polypropylene.
3. The polymerization reaction can be carried out by different methods such as solution polymerization, suspension polymerization or gas phase polymerization. Different methods of polymerization will have a certain effect on the performance of the product.
3. Post-processing
1. Polymer extrusion: The polypropylene generated by the polymerization reaction is extruded through an extruder to form strips or pellets.
2. Cooling and drying: The extruded polymer needs to be cooled and dried to remove water and volatiles from it.
3. Pelletizing and Packaging: The dried polymer is pelletized for easy storage and transportation. After granulation, the product is packaged, which is the finished PP-B.
The above is the basic manufacturing method of PP-B, the specific production process and equipment will vary according to different manufacturers and product requirements. At the same time, in order to ensure the quality and performance of the product, the manufacturing process needs to strictly control the process parameters and material ratios in each step.
In conclusion, PP-B, as an important raw material for chemical production, needs to be strictly controlled in all aspects of the process and materials during the manufacturing process to ensure the quality and performance of the product.
