Propylene

    • Product Name: Propylene
    • Chemical Name (IUPAC): Propene
    • CAS No.: 115-07-1
    • Chemical Formula: C3H6
    • Form/Physical State: Gas
    • Factroy Site: No. 86 Daqiao Road, Lijin County, Dongying, Shandong, China (Headquarters)
    • Price Inquiry: sales3@ascent-chem.com
    • Manufacturer: Lihuayi Group Co., Ltd
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    Specifications

    HS Code

    793472

    Chemicalname Propylene
    Chemicalformula C3H6
    Casnumber 115-07-1
    Molecularweight 42.08 g/mol
    Physicalstate Gas at room temperature
    Color Colorless
    Odor Faintly sweet
    Boilingpoint -47.6°C
    Meltingpoint -185.2°C
    Density 1.81 kg/m³ (at 0°C, 1 atm)
    Solubilityinwater Slightly soluble
    Flammability Highly flammable
    Vaporpressure 830 kPa (at 20°C)
    Autoignitiontemperature 455°C
    Unnumber UN1077

    As an accredited Propylene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Application of Propylene

    Purity 99.5%: Propylene with purity 99.5% is used in the production of polypropylene resins, where high purity ensures consistent polymerization and superior mechanical properties.

    Molecular weight 42.08 g/mol: Propylene with a molecular weight of 42.08 g/mol is used in gasoline blending, where its low molecular weight enhances octane rating and combustion efficiency.

    Stability temperature 120°C: Propylene with stability up to 120°C is used in refrigerant manufacturing, where thermal stability ensures safe operation and efficient heat transfer.

    Low sulfur content <5 ppm: Propylene with low sulfur content (<5 ppm) is used in chemical synthesis for acrylonitrile, where minimal impurities reduce catalyst poisoning and increase product yield.

    Melting point -185.2°C: Propylene with a melting point of -185.2°C is used in cryogenic applications, where its low temperature phase behavior supports stable storage and transport.

    Density 1.81 kg/m³: Propylene with a density of 1.81 kg/m³ is used in the manufacture of synthetic rubber, where precise density enables optimized blending and material performance.

    Water content <0.01%: Propylene with water content below 0.01% is used in polymerization reactions, where low moisture prevents unwanted side reactions and ensures high molecular weight polymers.

    Particle size <5 microns (aerosolized): Propylene in aerosolized form with particle size <5 microns is used in fire suppression systems, where fine dispersion enables rapid flame knockdown and reduced re-ignition risk.

    Chemical stability (6 months): Propylene with a chemical stability of 6 months is used in containerized gas supply, where prolonged shelf life supports long-term storage and reliable supply chain management.

    Viscosity 0.088 cP at 25°C: Propylene with a viscosity of 0.088 cP at 25°C is used in lubricating oil production, where low viscosity improves flow characteristics and enhances lubrication efficiency.

    Packing & Storage
    Packing A 40-liter steel cylinder labeled "Propylene (C₃H₆)," features hazard symbols, batch number, manufacturer details, and secure valve cap.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for Propylene involves securely loading pressurized cylinders or ISO tanks, ensuring safe handling and regulatory compliance.
    Shipping Propylene is shipped as a liquefied, flammable gas in pressurized cylinders or tanks. It requires proper labeling, secure containment, and temperature control to prevent leaks or ignition. Transportation follows strict regulatory guidelines for hazardous materials to ensure safety during transit by road, rail, or sea.
    Storage Propylene should be stored in tightly closed, pressure-resistant containers or tanks designed for flammable gases. Storage areas must be well-ventilated, away from heat sources and direct sunlight, and equipped with proper grounding to prevent static discharge. Storage temperatures should be maintained below propylene’s boiling point, and containers must comply with relevant regulations for flammable, compressed gases to ensure safe handling and storage.
    Shelf Life Propylene has an indefinite shelf life when stored in tightly sealed containers under recommended conditions, away from heat, ignition sources, and contaminants.
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    More Introduction

    Propylene: Straight from Our Plant

    Living with Propylene, Every Day in the Factory

    Propylene doesn’t just fill a line on a product list in our facility — it defines a big part of what we do. We’ve spent years refining the way we produce and handle propylene. Anyone who’s worked near a splitter tower, controlled the polymerization feeds, or checked motor valves on a deethanizer column gets why this colorless gas finds its way to countless downstream applications. What keeps many of us engaged is just how direct propylene’s impact really is — it doesn't just stop at being an intermediate; it shapes pipe, packaging, fibers, automotive interiors, and a good share of consumer goods.

    We manufacture polymer grade propylene (PGP), chemical grade, and sometimes raffinate streams, tuning purity for the next user's process. Our mainline PGP comes >99.5% pure. That takes continuous monitoring because just a trace of methyl acetylene or propadiene can trip up a downstream polypropylene reactor. Every day operators test for contaminants using gas chromatography and check for moisture, knowing that tighter specs translate to fewer headaches for customers. Unlike spec sheets you see traded on the open market, ours show performance over months and years, with maintenance logs to back up those numbers.

    The Plant and the Process

    Cracking naphtha and propane, separating through towers under strict temperature and pressure swings — it's loud, hot, and never truly idle. Overhauls and proper training keep the equipment sound. When the numbers drift, folks correct more than settings; we dive into heat exchanger fouling, trace where the pressure drop comes from, analyze vibration data, and talk supplier-to-customer to untangle grade issues long before they become a problem downstream. Because we own the process and the product, nobody waits for a third party to investigate. Lab, field, and control room — we cooperate every shift.

    Our propylene product stands out because we drive its quality from our own production lines. There’s no substitute for watching reaction trends, troubleshooting a compressor trim, or driving a plant turnaround that brings new efficiency to the column sequencing. We see nothing generic about our approach: the crew refines streams, weighs each draw, and brings a level of consistency that shortens customer startup times and reduces scrap rates.

    What Propylene Does and Where It Goes

    Why does propylene matter to so many businesses? Ask the teams in molded plastics; they want a feedstock that holds its grade shift after shift. The packaging line counts on propylene-derived films for food safety and shelf life. Polypropylene fiber lines, running at hundreds of meters per minute, demand input as pure as our production can make it. Propylene oxide plants need a reliable chemical backbone because that molecule leads to flexible foams, antifreezes, and coatings. The list doesn’t end there — acrylonitrile production, cumene, and even gasoline blending absorb the streams we push out daily.

    The thing about propylene is its reach. We see the trucks and railcars roll out to converters, tank after tank holding a feedstock that soon travels through molds, reactors, or distillation towers somewhere else. Many customers build their schedules around our delivery windows. When plant maintenance at our end runs over, that can mean a late batch on a customer’s line. We try not to let that happen. Our operators stay late before something rolls off spec, and planners review shipping logs so nothing is lost in transit. As a manufacturer, living close to this supply chain gives us a front-row seat to how propylene makes or breaks whole industries’ weekly output.

    Comparing Propylene with Other Olefins and Feedstocks

    Working in production, the comparison between propylene and other streams like ethylene, propane, or butenes isn’t just academic. Ethylene dominates volume in the sector, but propylene brings different chemistry. Ethylene adds two carbons — simple, fast polymerization. Propylene introduces a methyl branch, which creates flexibility in plastics, higher melting points, and more versatile end uses. For polypropylene reactors, any hint of ethylene cross-contamination changes product performance; the risk of shut-ins or out-of-grade production makes disciplined stream management essential.

    Many outside the trade think propylene floats as an isolated commodity, but in practice, the way we produce and distribute it ties into every cracker or refinery’s internal balance. Run rates shift as markets move. A plant focused on maximizing ethylene may cut propylene yields. Catalytic crackers, on the other hand, often swing toward propylene through selective process tuning. There’s a running joke in the control room: every feedstock has a tradeoff, and “one guy’s side product is another guy’s lifeblood.”

    Bringing up propane-based operations, we see a sharp difference: dehydrogenating propane for fresh propylene gives us more control of the yield and often tighter product specs. Yet this method demands more energy and close operator scrutiny to avoid coking and rough startups. Our plant walks that line with experience; daily rounds, infrared inspections, and rotating predictive maintenance keep us ahead of shutdowns. When comparing to C4 chemistry, butenes fall short for most polymer and advanced chemical pathways—propylene’s methyl branch keeps it in demand.

    Safety, Handling, and Reliability

    Inside the plant, propylene needs respect. The low boiling point, flammability, and pressure-grade handling force us to check every flange, every seal. Leak testing is a routine part of the shift. We calibrate sensors and pressure relief systems, knowing that every tube trailer or tank transfer runs through dozens of redundant checks. Safety isn’t just a checklist; it’s the stories workers hand down — learning from a near miss or recalling a tricky compressor seal swap.

    We don’t leave training to chance; new operators shadow veterans through the entire production process. Everyone remembers their first alarm, the pressure spike on a cold startup, or that tense moment balancing flows after a pump trip. Our team appreciates the risk, and that focus ends up protecting customers too. Consistent product leaves only when our storage analysis and loading inspections meet internal benchmarks. Mistakes here ripple all the way to someone else’s process line or reactor — none of us wants to answer that call.

    Environmental Focus and Regulatory Considerations

    Propylene production and shipment demand more than profit thinking — we feel the environmental and regulatory weight daily. Emissions controls, vapor recovery systems, and the shift toward energy efficiency dominate our plant’s investments. Every time a stack monitor drifts out of range or flare systems overwork due to a plant upset, the team digs in to diagnose, correct, and record steps for audit. Government regulations guide our process, but peer review and pride shape our standard of practice.

    We document more than required — tracking fugitive emissions, waste stream handling, and water use. CEMS (continuous emission monitoring systems) and LDAR (leak detection and repair) keep us honest and transparent. Operations staff record incidents and maintenance by hand and in our digital logs. Sometimes you’ll find our staff sitting through regulatory meetings, discussing cap-and-trade projections, or reviewing community feedback because we’re as local as our next-door fence.

    Lowering the environmental load of propylene means innovating both in production and use. We’ve worked with solvent recovery partners to capture unused streams, and invested in automation to reduce manual venting. Plant upgrades focus on energy efficiency to cut overall emissions. Plus, we join site neighbors in local emergency response planning and hazard drills.

    Customer Collaboration and Technical Support

    We often get calls, not from purchasing agents, but from plant engineers who need process flow diagrams, spec sheets, or troubleshooting help. Customers using our propylene value direct communication. Some want to know grades in real time for their batch scheduling, while others ask about odor thresholds, impurity drift, or pressure limits for their receiving tanks. Our technical staff speaks as fellow manufacturers — we’ve built or run many of the same systems on our site.

    If someone changes packing configurations or switches catalyst suppliers, we hear about it and talk through the implications. Sometimes it’s a matter of sending a product sample by priority courier and reviewing lab data together. A stuck pump or a new polymer grade may mean we coordinate late-night support or schedule a process engineer’s site visit. One plant’s off-spec trend becomes an entire team’s focus until everyone is confident the run meets requirements again.

    We maintain open shipping forecasts, and update customers early if weather, maintenance, or force majeure threaten a delivery. Our logistics crew and production staff adjust batch timing, sometimes running shifts late to help others make up lost time. Reliability, in our experience, grows not from canned policy but ongoing conversation backed by data from both ends of the supply chain.

    What Makes Our Propylene Unique

    We work every day with the mindset that customers’ success rides on each load’s quality and timeliness. Unlike traders or resellers, we control every step from feedstock sourcing, cracking, separation, and storage. That means better traceability for every batch and accountability from our team when issues pop up. If a customer calls with a technical problem or a logistics challenge, we go right to root cause, not excuses.

    Our legacy means we invest in upgrades before they’re strictly required. Over time, we’ve replaced aging valves, modernized column controls, switched process analyzers for faster cycle times, and retrained staff for advanced handling. All this produces tighter propylene specs and fewer plant upsets. Working through tight supply markets, weather events, or new product launches, our entire crew pulls in one direction because that’s how plant operations grow year over year.

    Customers notice the difference: fewer process disruptions, steadier batch runs, and consistent conversion rates. Most care little for market price swings or generic marketing claims — they hold us to performance because our name is on every delivery. By standing behind every metric, we keep relationships that last longer than contracts.

    Challenges: Supply Chains, Feedstocks, and Market Shifts

    Most shifts here don’t run on autopilot. Supply chain tightness comes with storms, turnarounds upstream, or shocks in global feedstock pricing. Propylene isn’t immune. A sudden naphtha shortfall can force us to adjust run rates or blend stock grades. Yet manufacturing gives us more options: we manage inventory buffers both in-plant and in storage, and we work with upstream refineries for early-warning when their process shifts threaten our output.

    Feedstock swings challenge every plant. If propane gets tight or expensive, our scheduling flips to naphtha. When demand spikes from a downstream customer, our planners run bridge shifts, reallocate splitters, or even bypass non-essential maintenance to meet output. Because all steps stay in-house, fix decisions happen in hours, not days. Adjusting to market or plant disruptions, we look further than the next purchase order — keeping teams cross-trained, automating data collection, and maintaining close contact across departments.

    Looking Ahead: Innovation and the Next Generation

    Manufacturing propylene looks different today than it did a decade back. We see more focus on integrating digital controls, remote monitoring, simulation of startup and shutdown procedures, and data-driven process optimization. Plant walkarounds still matter, but operators now bring tablets, compare live data to trendlines, and act faster on signs of drift. Every efficiency gain cuts energy, lowers emissions, and stabilizes pricing for our customers.

    Research into alternative routes — from renewable feedstocks or bio-based processes — gives us a window into potential future upgrades. While the bulk of propylene production remains fossil-based, our engineering groups track pilot programs and early commercial successes. For now, scale and reliability keep most facilities on proven pathways, but that doesn’t stop the search for viable next-generation solutions. We encourage technical staff to attend conferences, share learnings, and adjust plant practices based on new science.

    We value apprenticeships and cross-training. Many of us started at entry-level, learning from senior staff with decades of experience. We continue to bring on skilled trades, engineers, control operators, all working shoulder-to-shoulder. The handover between retiring staff and new hires is less a formality and more a practical necessity. Troubleshooting a valve or rebooting a distillation column comes easier when everyone speaks the same plant language.

    Final Thoughts from the Plant Floor

    Anyone can offer propylene as a commodity. In our experience, the difference comes down to how it’s produced, verified, handled, and delivered. We back that up through consistent product quality, prompt support, and a readiness to solve problems alongside every customer. Operating as the manufacturer, not a reseller or trader, means our whole plant stands behind every load shipped. We walk the line between innovation, reliability, and practical hands-on quality because we’ve seen how closely others’ production runs rely on our product. Every shift, every day, it’s a responsibility we don’t take lightly.