how to synthesis ethylene glycol?

Question

process of production.

Answer 1

Starting from ethylene: Ethylene oxide is produced by silver-catalyzed air oxidation of ethylene:

2CH2=CH2 + O2 --> 2(CH2CH2O) (it has a cyclic stucture with the oxygen atom conecting the two carbon atoms)

Then ethylene oxide is hydrolyzed in an acid environment to ethylene glycol:

CH2CH2O + H2O --> CH2(OH)-CH2(OH)

Answer 2

Lancenigo di Villorba (TV), Italy

Industrial production of ethylene glycol start by ethylene. As you know, ethylene is a gas (T, P normal conditions) who burns when ignited in air which flame seems an oil in flow. In the past, organic chemists (United Kingdow and german states in the XIX century, second half) studied hydrocarbons, principally methane and other light alkanes (CnH2n+2).
Among them, a great german chemist (A. von Baeyer, jewish origins) highlighted different properties of ethylene among other alkanes known even. He overcame to a simple chemical test for ethylene and other similar hydrocarbons, who us know as alkenes : ethylene is the simplest alkene. In a cold solution of an aqueous KMnO4 (dilute) solution, a pure hydrocarbon flows upward in bubble form. If the gas is an alkene (a common type of alkenes, so-called "isolated alkene") then dilute solution may lose its pinkish colour : we can say that Baeyer's test give positive result, in effect an isolated alkene is present. Warning! Remeber that also other gases may get these results, e.g. sulphur dioxide.
Industry follows not this process, but before I show you about industrial synthesis I would show you a common chemical pathway for ethylene conversion in its glycol. Now, ethylene gas stream flows in a new aqueous preparate, so-called "chlorine's water", a saturated solution of chlorine gas. It needs become to a great production of an crucial intermediate, 2-chloro-ethanol.
Our intermediate, solution of 2-chloro-ethanol, will be added dropwise in another vessel where it undergoes dilution in an alkaline (very high pH, as you know) medium. This alkaline liquid generates a gas, oxirane or ethylene oxide who is collected to react in an ultimate vessel, a scrubber where falls down a rain of acidic aqueous solution. The water-steams who results finally contain ethylene glycol. Nonetheless simplicity of single step, this method cannot give good production yields and limits its conduction to academic lessons. Indeed, you knew the practical role and utilities of oxirane who is the real intermediate in industrial production of ethylene glycol. An anhydrous stream of ethylene (bubbling in concentrated solution of sulphuric acid) is envoyed in a catalytic tower where crosses a very hot air stream ; thus, ethylene undergoes catalytic oxidation and becomes oxirane. Now, you can do a scrub process for water addition to oxirane by means of acidic solution.

I hope this helps you.

Answer 3

Alkenes on oxidation with mild oxidising agents like cold aqueous or slightly ALKALINE POTTASIUM PERMANGANET solution are oxidised to dihydroxy compounds known as glycols. This reaction is known as hydroxylation.
Ethylene glycol is synthesized from Ethene.
CH2=CH2 + H2O + O => CH2(OH)-CH2(OH)(Ethelyne glycol)
Ethene

Answer 4

To much work....just go buy some antifreeze.

Answer 5

please check with your text book which you refer.

one of the method is hydrlysis of ethylene.