Technology and Application of N-Butyric Acid
Butyric acid is colorless and transparent liquid, concentrated butyric acid has a disgusting smell, diluted taste reduced. At room temperature, it can be alcohol, ether and other organic solvents dissolve each other, the solubility in the aqueous solution of salt is small, can volatilize with water vapor. Calcium butyrate in cold water than in heat. The solubility in water is high and azeotrope is formed with water. butyric acid is used in the manufacture of various butyrate esters, butyric acid fibers, varnishes, drugs, spices, etc. it is also used as an emulsifier, fungicide and extractant.
At present, the production processes of butyric anhydride mainly include n-butaldehyde oxidation, propylene carbonyl synthesis, agricultural and sideline products fermentation and butanol alkali dissolution.
N-butyric acid has a wide range of applications.
1. Plastic industry
Butyric acid is one of the important chemical raw materials. the cellulose ester of butyric acid is bio-used in spray painting and molding. they have outstanding heat, light and moisture resistance. Cellulose acetate butyrate ester can dissolve in many solvents, and the ability to mix with resin and plastic is stronger than that of cellulose monoacetate, and it has high moisture resistance. They also have excellent formability and shape stability, such plastics are suitable for dry extrusion, even if the processing of longer objects can ensure the integrity of the shape, often used in the manufacture of brush handle, building cardboard, handrails, color flash lampshade, buttons, instrument shell, helmet, glasses and fire equipment and other daily necessities.
2 Flavors
Mainly used to produce esters as food additives and flavor, butyrate esters have a pleasant fruit flavor, is used as food additives. For example, methyl butyrate has apple flavor, ethyl butyrate has pineapple flavor, isoamyl butyrate has Sydney flavor, butylamides have pepper flavor. There are also aromatic butyrate in daily flavor.
3 Pharmaceuticals
Mainly used in the preparation of pharmaceutical intermediates, For example γ- aminobutyric acid has remarkable effect on the anti-hypoxia ability of crucian carp; (R) ethyl-2-hydroxy-4-phenylbutyrate (R2E H PB) is used for Benazepril, synthesis Enalapril, Lisinopril, Ramipril and other important intermediates of angiotensin converting enzyme inhibitors (ACEI), This kind of medicine is mainly used in the treatment of hypertension and congestive heart failure and other cardiovascular diseases; alkyl-substituted -γ- aminobutyric acid derivatives have a certain effect on the treatment of neuropathy.
4 Others
Butyric acid can also be used in polymer chemical industry. as a polymeric material, cellulose butyrate ester has good light resistance and is suitable for outdoor coatings, such as coating paint for cables, coating for equipment and coating for aircraft wings. Butyrate derivatives can also be directly used in cellulose plastics.
You can read more about the application of Butyric acid through the link:
http://www.betterchemtech.com/news/application-of-butyric-acid
