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9日星期五
polylactide new starting point for industrial development
There are abundant biomass resources, good technical and industrial base, in succession to achieve fuel ethanol, Zinc lactate, chemical alcohol, straw sugar, cellulose, butanol and a series of bio-chemical products development, production significant progress after he boarded the poly new starting point for the development of lactic acid industry.
Polylactic acid (PLA) is the most promising development in this century, bio-based polymers, derived from biomass can be completely degraded in the natural environment, with a low-carbon, green, and security features. In recent years, our country and the world some of the developed countries are accelerating the industrialization process of polylactic acid. Late last year, the State Council issued "bio-industry development plan", the magnessium lactate bio-based products included in the national action plan, clearly stated research to develop bio-based products in the market to encourage other aspects of consumer policy. Accelerate the industrialization and marketization of polylactic acid conditions are ripe, polylactic acid explosive growth of the industry is approaching.
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