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9月6日星期五
Plastics and Rubber its indispensable importance
The rapid development in all walks of life, the plastic
Rubber increasingly showing its vital importance.
With the national focus on supporting the development of new materials industry, the encouragement of sustainable development policy and its implementation And stringent environmental policies, plastics and rubber in the national economy more and more important role in the development have been Become irreplaceable material. Lactic acid and rubber application has been involved in automotive, electronics, medical, Household appliances, building materials, packaging, printing,agriculture, water conservancy, municipal engineering, transportation, transport Lose, cosmetic, food, aerospace, apparel, lactic acid powder, furniture, gifts and other fields, And applications in these areas continue to expand. While in some new areas should get more Purposes. Currently plastics processing industry has become the country's largest industry, light industry, China has become the world The largest plastics production and consumption country.
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