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1. AU1997011002 - Process for preparing alkyl ethers and mixtures thereof

Office Australia
Application Number 11002/97
Application Date 19.12.1996
Publication Number 1997011002
Publication Date 11.09.1997
Publication Kind A
IPC
C07C 41/06
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
05by addition of compounds to unsaturated compounds
06by addition of organic compounds only
B01D 3/00
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
3Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
C07C 41/42
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
34Separation; Purification; Stabilisation; Use of additives
40by change of physical state, e.g. by crystallisation
42by distillation
C07C 43/04
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
43Ethers; Compounds having groups, groups or groups
02Ethers
03having all ether-oxygen atoms bound to acyclic carbon atoms
04Saturated ethers
C10L 1/02
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
LFUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR  C10K111; LIQUEFIED PETROLEUM GAS;  USE OF ADDITIVES TO FUELS OR FIRES;  FIRE-LIGHTERS
1Liquid carbonaceous fuels
02essentially based on components consisting of carbon, hydrogen, and oxygen only
CPC
B01D 3/009
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
3Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
009in combination with chemical reactions
C07C 41/06
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
05by addition of compounds to unsaturated compounds
06by addition of organic compounds only
C07C 41/42
CCHEMISTRY; METALLURGY
07ORGANIC CHEMISTRY
CACYCLIC OR CARBOCYCLIC COMPOUNDS
41Preparation of ethers; Preparation of compounds having groups, groups or groups
01Preparation of ethers
34Separation; Purification; Stabilisation; Use of additives
40by change of physical state, e.g. by crystallisation
42by distillation
C10L 1/023
CCHEMISTRY; METALLURGY
10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
LFUELS NOT OTHERWISE PROVIDED FOR
1Liquid carbonaceous fuels
02essentially based on components consisting of carbon, hydrogen, and oxygen only
023for spark ignition
Y02P 20/10
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
20Technologies relating to chemical industry
10Process efficiency
Applicants Neste Oy
Inventors Lindqvist, Petri
Tamminen, Esa
Agents FB Rice Pty Ltd
Priority Data 956256 22.12.1995 FI
Title
(EN) Process for preparing alkyl ethers and mixtures thereof
Abstract
(EN)
The invention relates to a process for preparing tertiary alkyl ethers, in particular MTBE, ETBE or mixtures of these ethers with heavier ethers. According to the process the feedstock containing hydrocarbons is fed to a catalytic distillation reactor system, in which the isoolefines, in particular the C4 to C7 isoolefines, of the feed are reacted with an alkanol in the presence of a cation exchange resin in order to produce tertiary alkyl ether products. The reaction product containing the ethers is removed from the distillation system as the bottoms product and, if necessary, it is subjected to an additional treatment for producing a gasoline component. The unreacted alkanol is removed as the overhead product of the distillation. According to the invention, the distillate withdrawn mainly contains an azeotrope of C3 hydrocarbons and alkanol, the C3 amount of which at least approximately corresponds to the C3 hydrocarbon concentration of the hydrocarbon feed, a substantial amount of the unreacted alkanol being removed in the form of said azeotrope. By means of the invention the need for a separate alkanol washing unit is eliminated in the apparatus which considerably reduces apparatus investment costs.