Propionic Acid Production Methods
1. Propylene Oxidation Process
Propylene oxidation is currently the most dominant method for producing propionic acid worldwide. Using air or oxygen as the oxidant, propylene reacts with air in the presence of a catalyst to form propionic acid. This process is ch...
Introduction to Propionic Acid
Propionic acid is a colorless, transparent liquid with a pungent odor. Its chemical formula is C₃H₆O₂ (corrected from the source text). As an important organic chemical, it is widely used in pharmaceuticals, plastics, textiles, coatings, cosmetics, and other industr...
Propionic Acid National Standard (GB Specifications)
The national standard for propionic acid clearly defines its appearance: it shall be a colorless, transparent liquid with a pungent odor, and its color must meet specific visual colorimetric standards (e.g., with an APHA value not exceeding a s...
Propionic Acid Storage and Transportation Precautions
Store in a cool, well-ventilated warehouse. Keep Propionic Acid away from ignition sources and heat. The warehouse temperature should not exceed 30°C. Keep containers tightly sealed. Store separately from oxidizing agents, reducing agents, and...
Propionic Acid Packaging
Propionic acid with a purity of 99.5% or higher must be packaged in alloy or aluminum containers.
Dilute propionic acid cannot be stored in aluminum tanks; use alloy steel or carbon steel tanks with a plastic lining instead.
Propionic Acid Toxicity and Safety Precautions
...
Propionic Acid Applications
Propionic acid is an organic synthesis raw material, primarily used to produce propionates and esters.
Its calcium and sodium salts serve as excellent preservatives for baked goods and grains.
Its esters are used as specialty solvents in fragrances and coatings.
Phenyl...
Applications of Oxalic Acid
Oxalic acid is widely used in various industrial sectors:
Pharmaceutical industry: Used in the manufacture of medicines such as chlortetracycline, oxytetracycline, tetracycline, streptomycin, vitamin B12, phenobarbital, calcium pantothenate, borneol, and sodium iodoxam...
Glyoxal Oxidation Method of Oxalic Acid
Glyoxal has strong reducibility, so it can be rapidly oxidized to oxalic acid under the action of strong oxidizing nitric acid. Due to factors such as raw material supply, price, and technology, this method has poor market competitiveness and has not been i...
Propylene Oxidation Method of Oxalic Acid
This oxidation process is divided into two steps: oxidizing propylene with nitric acid to convert it into α-nitro lactic acid, and then further catalytic oxidation to obtain oxalic acid. The propylene oxidation method produces industrial-grade oxalic acid...
Ethylene Glycol Nitric Acid Oxidation Method of Oxalic Acid
This oxidation process is very similar to the starch oxidation method. An aqueous ethylene glycol solution is heated to 60 °C, and mixed acid (30%–40% sulfuric acid by mass, 20%–25% nitric acid by mass) and vanadium pentoxide are added u...
Sodium Formate Method of Oxalic Acid
The production of oxalic acid by the sodium formate method is divided into the lead method and the calcium method. Carbon monoxide is absorbed by a sodium hydroxide solution to obtain sodium formate, which is then dehydrogenated to form sodium oxalate. The lat...