Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月6日星期二
poly-L-lactic acid production
L-lactic acid and L-lactate in food, medicine, agriculture, chemical industry and other fields have a wide range of applications. In addition, L-lactic acid and is vigorously developing applications, namely, the production of poly-L-lactic acid.
Poly-L-Lactic acid as a non-toxic, biodegradable and lactic acid powder aterials used to manufacture Biodegradable plastic, green packaging materials and medicinal repair materials, so as to solve the increasingly serious
"White pollution" problem, caused widespread concern in the world, very broad application prospects,Has good social and economic benefits. With more and more extensive use of L-lactic acid, City The demand is also growing field. Home and abroad have already begun production of its in-depth research,And achieved gratifying results.
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