Patent GB-400054-A (GB)
Title: A process for the removal of acetylene from gases
IPC: B01D53/14
Filed: 1933-02-13
Abstract: Acetylene is removed from a gaseous mixture by absorbing it in one or more solvents of the class consisting of polyglycols, their ethers, esters and mixed ether-esters, by bringing the gaseous mixture into contact, e.g. countercurrent contact, with the solvent at a suitable temperature, preferably cooled, and with or without pressure.  The acetylene may be subsequently recovered by heating the solution to expel the gas, or by reducing the pressure over the solution, or by a combination of both methods.  The solvent can be recirculated. Suitable solvents are: symmetrical polyglycols, e.g. diethylene glycol, dipropylene glycol, dibutylene glycol, triethylene glycol; asymmetrical polyglycols, e.g. ethylene propylene glycol, ethylene butylene glycol, propylene butylene glycol, diethylene propylene glycol, diethylene butylene glycol; branched-chain polyglycols, e.g. isopropylene ethylene glycol, isopropylene isobutylene glycol, di-isopropylene glycol, tri-isopropylene glycol, ethylene isopropylene glycol, diethylene isopropylene glycol; polyglycols containing substituent atoms or groups, e.g. of the hydroxy, halogen, nitro, cyano or sulpho type; polyglycol ethers (primary, secondary or tertiary, normal or iso-), esters (of aryl, alkyl or aralkyl acids) or mixed ester-ethers, e.g. diethylene glycol mono- or di-methyl, -ethyl, -propyl or -butyl ether, diethylene glycol monoisopropyl ether, diethylene glycol mono-tertiary butyl ether, diethylene glycol mono- or di-lactate, -benzoate, -maleate or -oxalate, diethylene glycol monoethyl ether formate, diethylene glycol mono-isopropyl ether benzoate, diethylene glycol mono-tertiary butyl ether acetate, diethylene glycol monophenyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol mono- or di-acetate, diethylene glycol monopropyl ether acetate or diethylene glycol monobutyl ether acetate.  Specification 331,654, [Class 1 (i), Chemical processes &c.], is referred to.ALSO:Acetylene is removed from a gaseous mixture by absorbing it in one or more solvents of the class consisting of polyglycols, their ethers, esters and mixed ester-ethers, by bringing the gaseous mixture into contact, e.g. counter-current contact, with the solvent at a suitable temperature, preferably cooled, and with or without pressure.  The acetylene may be subsequently recovered by heating the solution to expel the gas, or by reducing the pressure over the solution, or by a combination of both methods.  The solvent can be recirculated.  Suitable solvents are: symmetrical polyglycols, e.g. diethylene glycol, dipropylene glycol, dibutylene glycol, triethylene glycol; asymmetrical polyglycols, e.g. ethylene propylene glycol, ethylene butylene glycol, propylene butylene glycol, diethylene propylene glycol, diethylene butylene glycol; branched-chain polyglycols, e.g. isopropylene ethylene glycol, isopropylene isobutylene glycol, di-isopropylene glycol, tri-isopropylene glycol, ethylene isobutylene glycol, diethylene isopropylene glycol; polyglycols containing substituent atoms or groups, e.g. of the hydroxy, halogen, nitro, cyano or sulpho type; polyglycol ethers (primary, secondary or tertiary, normal or iso-), esters (of aryl, alkyl or aralkyl acids) or mixed ester-ethers, e.g. diethylene glycol mono- or di-methyl, -ethyl, -propyl or -butyl ether, diethylene glycol monoisopropyl ether, diethylene glycol mono-tertiary butyl ether, diethyleneglycol mono- or di-lactate, -benzoate, -maleate or -oxalate, diethylene glycol monoethyl ether formate, diethylene glycol monoisopropyl ether benzoate, diethylene glycol monotertiary butyl ether acetate, diethylene glycol monophenyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol mono- or di-acetate, diethylene glycol monopropyl ether acetate or diethylene glycol monobutyl ether acetate.  Specification 331,654, [Class 2 (i), Acetylene], is referred to.  Polyglycols.--Asymmetrical polyglycols may be obtained by elimination of one or more molecules of water from two or more molecules of different glycols, or by the action of an olefine oxide on a glycol.  Thus ethylene propylene glycol can be prepared by the elimination of one molecule of water from one molecule of ethylene glycol and one molecule of propylene glycol, or by the action of ethylene oxide on propylene glycol.  Symmetrical polyglycols may also be prepared by the action of an olefine oxide on a glycol.  Diglycols can react with another molecule of glycol with elimination of water to produce triglycols.  Esters and ethers of polyglycols may be prepared by the usual methods of esterification and etherification.