Processing

Please wait...

Settings

Settings

Goto Application

1. CN1209114 - Process for preparing alkyl ethers and mixtures thereof

Office China
Application Number 96199982.9
Application Date 19.12.1996
Publication Number 1209114
Publication Date 24.02.1999
Grant Number 1070834
Grant Date 12.09.2001
Publication Kind C
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
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
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 Liquid Oy
福图石油及煤气公司
Inventors E. Tamminen
E·塔米仁
P. Lindquist
P·林德奎斯特
Agents wang jingchao
中国专利代理(香港)有限公司
中国专利代理(香港)有限公司
Priority Data 956256 22.12.1995 FI
Title
(EN) Process for preparing alkyl ethers and mixtures thereof
(ZH) 制备烷基醚及其混合物的方法
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.

(ZH)

本发明涉及一种制备叔烷基醚(特别是MTBE、ETBE或这些醚与重醚的混合物)的方法。根据本发明方法,将含烃的原料供入到催化蒸馏反应器系统,在此反应器系统中,进料中的异烯烃(特别是C4~C7异烯烃)在阳离子交换树脂存在下与链烷醇反应以产生叔烷基醚产物。包含醚的反应产物以底部产物方式被从蒸馏系统中排出,如果需要的话,并对其进行附加处理以产生汽油组分。未反应的链烷醇以蒸馏塔顶馏出物形式被排出。根据本发明,排出的馏出液主要含有C3烃与链烷醇的共沸物,其中C3烃量至少约与烃原料中的C3烃浓度相当,相当大部分的未反应链烷醇的量以所述的共沸物形式被排出。采用本发明方法,消除了对分离链烷醇洗涤装置的需要,从而大大地降低了设备的投资费用。