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Ethylene glycol is widely used to inhibit the formation of natural gas clathrates (hydrates) in long multiphase pipelines that convey natural gas from remote gas fields to a gas processing facility. Ethylene glycol can be recovered from the natural gas and reused as an inhibitor after purification treatment that removes water and inorganic salts.
Structure and properties ... Vapor–liquid equilibrium for ethylene glycol/methanol [3] P = 760 mmHg BP temp. °C % by mole methanol liquid vapor 66.70: 93.0: 99.9
Ethylene glycol 1.115 Diethylene glycol 1.118 Propylene carbonate 1.21 Formic acid 1.22 1,2-Dichloroethane 1.245 Glycerin 1.261 Carbon disulfide 1.263 1,2-Dichlorobenzene 1.306 Methylene chloride 1.325 Nitromethane 1.382 2,2,2-Trifluoroethanol 1.393 Chloroform 1.498 1,1,2-Trichlorotrifluoroethane 1.575 Carbon tetrachloride 1.594
The resulting product is two ethylene glycol molecules joined by an ether bond. [5] "Diethylene glycol is derived as a co-product with ethylene glycol (MEG) and triethylene glycol. The industry generally operates to maximize MEG production. Ethylene glycol is by far the largest volume of the glycol products in a variety of applications.
Examples include ethane-1,2-diol or ethylene glycol HO−(CH 2) 2 −OH, a common ingredient of antifreeze products. Another example is propane-1,2-diol, or alpha propylene glycol, HO−CH 2 −CH(OH)−CH 3, used in the food and medicine industry, as well as a relatively non-poisonous antifreeze product.
Here, ethylene oxide is obtained as the overhead product, whereas the bottom product obtained is known as the glycol bleed. When ethylene oxide is scrubbed from the recycle gas with an aqueous solution, ethylene glycols (viz. mono-ethylene glycol, di-ethylene glycol and other poly-ethylene glycols) get unavoidably produced.
Polymerization of ethylene oxide is an exothermic process. Overheating or contaminating ethylene oxide with catalysts, such as alkalis or metal oxides, can lead to runaway polymerization, which can end in an explosion after a few hours. Polyethylene oxide, or high-molecular-weight polyethylene glycol, is synthesized by suspension polymerization.
Ethylene glycol poisoning is poisoning caused by drinking ethylene glycol. [1] Early symptoms include intoxication, vomiting and abdominal pain. [1] Later symptoms may include a decreased level of consciousness, headache, and seizures. [1] Long term outcomes may include kidney failure and brain damage. [1]