Explore our highly certified product listings direct from certified Shandong Pulisi facilities, ensuring quality compliance, optimized production economics, and global delivery guarantees.
Evaluating the thermodynamic interactions, economic efficiency, and localization applications of Ionic Liquids (ILs) in breaking the Acetonitrile-Water Azeotrope.
Acetonitrile (CH₃CN) is a key dipolar aprotic solvent widely utilized in pharmaceutical syntheses, HPLC analysis, and lithium battery electrolyte manufacturing. However, during synthesis or industrial recycling, acetonitrile forms a minimum-boiling azeotrope with water at approximately 83.7°C (containing 83.7 wt% acetonitrile at atmospheric pressure). Traditional separation techniques—such as pressure-swing distillation (PSD) or addition of volatile entrainers (e.g., benzene)—are highly energy-intensive and pose considerable environmental hazards. The Acetonitrile Ion Process, utilizing tailor-designed ionic liquids as extractive solvents, has emerged as a disruptive, energy-efficient alternative.
The core of the acetonitrile ion process relies on the unique charge distribution and tuneable properties of Ionic Liquids (ILs). Ionic liquids, which are organic salts liquid at or near room temperature, consist of bulky asymmetric cations (e.g., 1-alkyl-3-methylimidazolium [C_n_mim]⁺) paired with various inorganic or organic anions (e.g., tetrafluoroborate [BF₄]⁻, dicyanamide [N(CN)₂]⁻, or acetate [OAc]⁻).
When introduced into an acetonitrile-water mixture, the ionic liquid coordinates preferentially with water molecules. The high charge density of the IL ions triggers strong hydrogen bonding and electrostatic interactions with the hydroxyl group of water. This dramatically decreases the water's activity coefficient relative to that of acetonitrile, shifting the vapor-liquid equilibrium (VLE) curve. The relative volatility of acetonitrile increases, enabling clean separation at the top of the extractive distillation column, while the water and IL are drawn from the bottom. The non-volatile nature of the IL ensures that it can be thermally regenerated with minimal energy consumption and zero solvent carryover.
| Performance Parameter | Traditional Pressure-Swing Distillation | Chemical Entrainer Distillation (Benzene/Hexane) | Advanced Acetonitrile Ion Process (Ionic Liquids) |
|---|---|---|---|
| Energy Consumption | High (dual-column heat load) | Moderate-High | Low (up to 40% thermal energy savings) |
| Purity Output (HPLC Grade) | 99.9% (requires multi-stage polishing) | 99.5% (risk of hydrocarbon contamination) | >99.99% (highly stable, electronic/HPLC grade) |
| Environmental Footprint | Medium (moderate CO2 emissions from fuel) | High (carcinogenic volatile organic compounds) | Extremely Low (reusable IL, zero VOC emission) |
| Capital Expenditure (CAPEX) | High (two high-pressure columns required) | Moderate | Low-Moderate (single column with efficient evaporator) |
| Recyclability of Entrainer | N/A (no physical entrainer added) | Requires distillation (entrainer loss occurs) | Highly Stable >99.95% recycling efficiency |
The progression of chemical engineering toward fully digital, automated, and continuous ionic liquid systems.
Widespread deployment of 1-butyl-3-methylimidazolium acetate [Bmim][OAc] for municipal and industrial pharmaceutical refinery lines. High separation efficiency but limited thermal stability past 120°C.
Synthesis of hydrophobic-hydrophilic hybrid anions that allow self-phase separation after extraction. Significantly reduces the thermodynamic energy required for the recovery loop in mass production.
Integration of real-time molecular modeling sensors within distillation units, dynamically matching ionic liquid concentration to variance in feedstock purity automatically.
Shandong Pulisi Chemical Co., Ltd. (Stock Code: 307785) is a globally certified chemical manufacturing and supply group driving process innovation since 2006.
Shandong Pulisi Chemical Co., Ltd. focuses on petrochemicals, mining chemicals, feed additives, and pharmaceutical chemical synthesis. At present, the company has established long-term and stable partnerships with Fortune Global 500 companies such as China National Petroleum Corporation (CNPC) and Saint-Gobain. We take customer demand as the core orientation, providing tailored solutions to strengthen our customers' market competitiveness.
*Strict Statement: Shandong Pulisi has not established branches outside of Shandong Province. If there is any act of impersonating Shandong Pulisi, our company reserves the right to pursue legal responsibilities.
Bridging Chinese manufacturing capacity with localized demands in Europe, North America, and Central Asia via optimized transport corridors.
Acetonitrile processed via ionic liquids guarantees the absolute absence of chlorinated solvent impurities, making it highly suitable for manufacturing active pharmaceutical ingredients (APIs) in compliance with FDA and EMA regulations.
As the demand for ultra-high performance lithium batteries grows, acetonitrile-based electrolytes require water concentration levels below 10 ppm. The selective binding energy of ionic liquids enables cheap, high-throughput extraction to meet these specs.
Our mature warehousing systems at key logistics hubs—including Qingdao Port, Tianjin Port, and crucial Western border points (Alashankou, Khorgos)—ensure rapid delivery to Central Asian, European, and trans-oceanic destinations.
Our operational systems, verified by ISO9001:2015 and international third-party certification bodies, guarantee batch consistency and legal safety.
Our solutions span diverse commercial applications, backed by stable petrochemical synthesis and direct bulk pricing structures.
Delivering exceptional value, transparent pricing, and robust chemical supply services across the globe.
Exporting to more than 100 countries and regions with full documentation support, ensuring customs clearances proceed smoothly.
More than 20+ years of export experience, maintaining active and cooperative relations with more than 1,000 global enterprises.
Strict compliance standards: ISO Certification, SGS verification, K-REACH compliance, and FAMI-QS certifications.
We always provide competitive, custom quotes based on tailored packaging designs, purities, and volume requirements.
Large-scale, specialized warehouses strategically located close to China's primary shipping ports to minimize inland transit times.
Our highly responsive sales and technical support teams offer end-to-end after-sales and cargo monitoring services.
Building long-term logistics and chemical trading structures with the world's most trusted brands.
Find answers to common technical, logistics, and pricing queries below.
Of course you can. Just send us your logo design and branding specifications, and we will apply it to the corresponding drums or containers in compliance with regional chemical labeling laws.
If you are a small retailer or growing chemical entrepreneur, we would absolutely love to grow with you. We look forward to building a long-term commercial relationship with you, and we offer flexible initial MOQs.
We always prioritize our customers' interests. Prices are negotiable under different volume, payment, and contract terms. We guarantee that you will receive highly competitive quotes direct from our factories.
Yes, we provide free product samples for quality testing and lab evaluation. Please contact our sales representatives to arrange sample delivery and provide your courier details.
Yes, absolutely! We have specialized in international chemical exports for over 20 years. Because of our deep logistics networks, shipping port proximity, and large warehouse holdings, we can guarantee reliable on-time delivery.
We accept flexible payment terms, including T/T (Telegraphic Transfer), L/C (Letter of Credit), D/P (Documents Against Payment), and O/A (Open Account) terms based on credit evaluations.
Of course, you are very welcome to visit our primary manufacturing and warehousing facilities located in Zibo, Shandong Province, China (about 1.5 hours' drive from Jinan airport). We would be glad to show you our operational systems.
Simply send an inquiry to our sales team detailing your required specifications, delivery terms, and volumes. We will issue a formal quote and guide you through the process, from purchase order generation to final shipment tracking.
Browse our verified organic, inorganic, and specialty solvents and additives, optimized for industrial processing requirements worldwide.
Pulisi