Group 1: Industry Investment Rating - No information provided Group 2: Core Viewpoints - The report comprehensively introduces the basic concepts, chemical properties, downstream consumption fields, and production processes of propylene, highlighting its importance in the chemical industry and various influencing factors [1][2][3] Group 3: Summary by Relevant Catalogs 1. Propylene Basic Concepts - Propylene (C3H6) is a colorless, slightly sweet, flammable gas, belonging to the olefin series. It has specific physical properties such as a melting point of -185°C, a boiling point of -47.68°C, and a low flash point of -108°C. It's usually liquefied for transportation and storage, and is not suitable for long - distance transportation [1] - Chemically, it can undergo addition, oligomerization, coordination polymerization, and substitution reactions, deriving high - value chemicals [2] 2. Downstream Consumption Field Distribution - About 68% of propylene is used to produce polypropylene, which is widely used in packaging, automotive, medical, and textile industries. Other significant downstream products include propylene oxide (8%), acrylonitrile (6%), acrylic acid (4%), octanol (4%), and n - butanol (3%). Emerging demands like photovoltaic adhesive films and lithium - battery separators are driving the upgrade of the propylene consumption structure [3] 3. Propylene Production Processes - **Steam Cracking**: Using petroleum hydrocarbons as raw materials, it accounts for about 60% of global propylene production. It's a traditional mainstream method, with high stability and large - scale production capacity, but high energy consumption and dependence on crude oil prices [6] - **Catalytic Cracking (FCC)**: Using heavy oil as raw materials, it produces gasoline, diesel, and propylene as a by - product. It accounts for about 25% of global propylene production, with high flexibility but relatively low propylene purity [7] - **Coal - to - Olefins (CTO/MTO)**: It's a non - petroleum route, suitable for regions rich in coal and short of oil. China is the largest producer. However, it faces environmental pressure and requires optimization of catalyst life and by - product treatment [9] - **Propane Dehydrogenation (PDH)**: Using propane as the raw material, it has a high - purity propylene product (over 99.5%). The global PDH capacity has been growing rapidly, and China is a major market. It depends on stable and low - cost propane supply and can recycle by - product hydrogen [10]