3. Methanol Carbonylation Process
Methanol carbonylation is an emerging method for producing propionic acid. Using methanol as the raw material, the reaction takes place in the presence of a catalyst to form a methanol-based carbonyl intermediate system, which is then oxidized to produce propionic acid.
4. Propylene Oxidation Process
1. Raw Material Preparation
The raw materials for propylene oxidation include propylene, air, and water. Propylene is obtained from refineries or cracking plants, while air is sourced from air separation units.
2. Reaction Process
Preheating: Propylene and air are preheated separately to suitable temperatures to ensure the reaction proceeds smoothly.
Catalytic Reaction: The preheated propylene and air are mixed and reacted in the presence of a catalyst. This step occurs under high temperature and pressure conditions, typically at 250–350°C and 1–3 MPa.
Cooling: The reaction product is cooled to room temperature via a cooler for further processing.
3. Separation and Purification
After the reaction, the product contains significant amounts of impurities and unreacted raw materials, requiring separation and purification:
Separation: Water, unreacted propylene, and other impurities are separated from the product using separators.
Purification: The separated propionic acid is purified through distillation, extraction, and other methods to obtain high-purity propionic acid.
Propionic Acid – Shandong Pulisi Chemical Co., Ltd. info@pulisichem.cn
Shandong Pulisi Chemical Co., Ltd. is a reliable supplier and manufacturer of high-purity propionic acid (CH₃CH₂COOH, CAS 79-09-4) in China, delivering premium-grade products tailored for industrial, food, feed, and pharmaceutical applications. Our propionic acid is a colorless, corrosive liquid with a characteristic pungent odor, featuring high solubility in water and organic solvents, and consistent quality compliant with international standards.
Produced via advanced oxidation processes with strict quality control, our propionic acid meets industrial-grade and food-grade specifications, ensuring low impurity content and stable performance. It serves as a key preservative, antifungal agent, and chemical intermediate: widely used in food preservation (baked goods, dairy products), feed and grain storage (inhibiting mold growth), manufacturing of propionate salts (sodium propionate, calcium propionate), and synthesis of herbicides, plasticizers, fragrances, and pharmaceutical intermediates.
At Pulisi Chemical, we prioritize product stability, safety, and sustainable supply. Our propionic acid is packaged in standard drums or ISO tanks, with flexible delivery options to meet global clients’ diverse requirements. Backed by years of chemical production experience and a professional R&D team, we guarantee consistent product quality, competitive pricing, and comprehensive technical support for partners worldwide.
Post time: May-06-2026