glycol

Mainly used as solvents, such as nitric acid fiber, rubber, resin, oil, paint, solvents such as family medicine
Physical Properties: CAS No. 107-21-1
Chinese name of the stick model of ethylene glycol
EINECS No. 203-473-3
Login English name Ethylene glycol, Mono ethylene glycol, MEG, EG.
English Synonyms: glycol, 1,
2-ethanediol.
alias glycol molecular formula C2H6O2;
structure: HOCH2CH2OH
molecular weight 62.07
melting point -13.2 °C
Boiling point: 197.85 °C
density, relative density (water = 1) 1.1155 (20 °C); relative density (Air = 1) 2.14 colorless appearance and character
, odorless, sweet, sticky liquid
vapor pressure 6.21kPa/20 °C Flash point: 111.1 °C Viscosity: 25.66mPa.s (16 °C) Solubility of water / ethanol / acetone / acetic acid glycerol miscible pyridine, etc.,
, slightly soluble in ether, insoluble in petroleum hydrocarbons and oils. to understand the zinc chloride / sodium chloride / potassium carbonate / potassium chloride / potassium iodide / potassium hydroxide and other inorganic substances. Surface tension: 46.49 mN / m (20
°C) stability of the steady light: 118 °C chemical properties: Due to the low molecular weight, nature and lively, can take the esterification / etherification / Aging / Oxidation / acetal / dehydration reactions
[Edit this section] system of law
Direct hydration of ethylene oxide.
Industrial-scale production of ethylene glycol for the present the only way.
Ethylene oxide and water in the pressure (2.23MPa) and 190 ~ 200 °C condition, in a tubular reactor liquid phase hydration of ethylene glycol directly, while by-product of diethylene glycol, triethylene the second reduction
glycol and ethylene glycol over condensation.