Molecular formula : C4H8O2
MW : No. 107-44-8 88.10
nature : a transparent colorless, oily liquid with irritation and unpleasant odor, very dilute solution Khan also smell. -4.26 ° C melting point. Boiling point of 163.7 ° C (101kPa), the relative density of 0.959 (20 / 4 ° C), the refractive index of 1.3984. Flash point (open cup) 77 ° C With water, alcohol, ether immiscibility. Acid water formed Azeotrope mixture boiling point of 99.4 ° C, water content of 81.4%. Acid Esters often in the form of free or state exists in nature, such as acid glyceride exist in butter, so the acid called GABA. Plastic from the acid found in animal feces and sweat. Milk rancidity also the stench emitted from butyrate production of acid hydrolysis.
Preparation : 1. Butyraldehyde oxidation butyraldehyde acid in the presence of manganese catalyst with air or oxygen oxidation reaction, namely positive acid. Butyraldehyde be butanol oxydehydrogenation or propylene carbonylation reaction derived. 2. Propylene oxo synthesis of Ni (CO) 4 catalyst from propylene by oxo synthesis. 3. Amyl nitrate alcohol oxidation by amyl alcohol in the boiling concentrated nitric acid were first elimination reaction occurred, the loss of water and generation member of olefin, olefin further oxidation by nitric acid and lost a carbon atom, generation of acid. 4. Fermentation starch and molasses as raw material, used acid fermentation bacteria that can be used to take acid and lactic acid.
purposes : acid is mainly used in manufacturing cellulose butyrate, for the manufacture of heat molding plates, glasses, car steering wheel, black phone components such as the Anti-aging, water-resistance, etc. contractility than cellulose-acetate, butyrate is also extensively used in the manufacture of varnish and molding powder. Acid used in the manufacture of cellulose acetate, with a variety of resin Miscibility more allocated for paint, glass and cotton blended. For all types of synthetic acid butyrate, cellulose flame retardants and other organic synthesis, the main acid derivatives is formic acid, ethyl, α-butyl bromide, butyramide, butyrylcholinesterase aniline, Ding chloride, acid glyceride 3, Ding benzene - ether, D amine acid amides fennel, etc.. For spices, food additives, pharmaceuticals, fire retardants, such as fungicides used. Butyric acid esters with pleasant fruit flavor, such as a small apple scented methyl, ethyl a small pineapple aromas, acid Isoamyl a Sydney aromas, acid isopropyl also pineapple flavor. Daily Flavor of acid and butyric acid ester Linalyl geranylflavanone are also acid ester derivatives. Although acid is emitted substances, the use of which is restricted, but also those with the raw materials indispensable material. It is not only for butter, cheese flavoring spices of the main raw materials, but also make many fruit flavor by taste, such as thickening. As for the smell, the use of a trace amount of the acid can be issued very strong, very strong smell.
Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".