Method of producing methyltertbutyl ether

专利摘要:
A process for preparing tertiary alkyl ethers from isoolefins and aliphatic alcohols in the presence of a catalyst in the form of sulphonated styrene-divinylbenzene resins, characterized in that both the reaction leading to the formation of the tert-alkyl ether and the separation of the tert-alkyl ether from the hydrocarbons and compounds which accompany it take place in a single plate fractionating apparatus, in which some of the plates are provided with beds of catalyst in the form of spherules suitable for preparing said tert-alkyl ether, the ether obtained being withdrawn as a substantially pure bottom product.
公开号:SU1223839A3
申请号:SU823452823
申请日:1982-04-09
公开日:1986-04-07
发明作者:Парет Джианкарло
申请人:Снампрогетти С.П.А. (Фирма)；
IPC主号:

专利说明:

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This invention relates to a process for the production of methyl-tert-butyl ether, used as a high-octane gasoline additive.
The aim of the invention is to simplify the process and increase the yield of the target product.
Example 1. A distillation column is made of flanged tubes with sections of 100 cm in length and 10 cm in diameter, each section containing the cap of distillation plates (two bubble caps per plate). The column is composed of sections, the plates of which are filled with catalyst - amberlite-15, and sections that are not filled with catalyst: six sections above the feed point of the hydrocarbon feedstock and two sections below this point. In the column Gyudat C / hydrocarbon containing 50% isobutene at a feed rate of 2 kg / h
A reflux ratio of 1: 1 is maintained and 570 g / h of methanol are supplied together with the irrigation reflux. The working pressure is 5 atm, the temperature along the column is 40–130 ° C. 1045 g of a product containing 25 g of methanol, 10 g of isootene, and the rest of C-hydrocarbons are obtained in the form of distillates. 1525 g (97%) of the desired methyl tert-butyl ether are obtained in the form of cccccc.
Redektor O. Yurkov etska
1729/62
Circulation 379 Subscription
VNIIPI USSR State Committee
on affairs invented1-w and discoveries 113035, Moscow, F.35, Raushsk nab. 4/5
Branch PPP Patent, Uzhgorod, st. Project, 4
23839
Example 2. BejiyT process is analogous to example 1, the flow of methanol is 585 g / h, the operating pressure is 10 atm, the temperature along the length of the column is 80-170 C. It is obtained in Leds
5 distillates 1045 g, containing 40 g of methanol IO g of isobutene, the rest S. hydrocarbons. 1540 g (98%) of the desired methyl tert-butyl ether are obtained as a bottoms ta.
Example 3. The process is carried out analogously to example 1, the flow of methanol 575 g / h The working pressure is 8 atm, the temperature along the length of the column is 60-150 ° C. 1035 g of product is obtained in the form of distillate;
15 30 g of methanol, 5 g of isobutene, the rest C hydrocarbons. 1.540 g (98%) of the desired methyl tert-butyl ether are obtained as a bottoms product.
The proposed method allows to obtain
20 target product with a yield of 97-98% against 91.2% with the known method. In this case, the proposed method eliminates the need for DIMOST1) in the partial recycling of unreacted tert-butene in connection with its almost complete conversion. In addition, collapsible sections are used, which facilitates the loading and unloading of the catalyst, whereas with the known method one hollow column is used which needs to be filled.
30 catalyst bagged.
Make it up and. Zavarzin
Tehred and. Heresor Corrector C, Shekmar

权利要求:
Claims (1)
[1]
METHOD FOR PRODUCING METHYL – TERT – BUTYL ETHER by treating a mixture of hydrocarbons containing isobutylene with methanol at elevated temperature and pressure in the presence of a catalyst — sulfonated styrene-divinylbenzene resins in a distillation column to isolate the target product in the form of a bottom residue, characterized in that, in order to simplify the process and increase in the yield of the target product, the process goes at a column cube temperature of 130-170 C and a pressure of 5-10 atm in a column with cap cups divided by sections in height, filled with a catalyst in the form of balls and alternating sections with them, unfilled with a catalyst, with a mixture of feed hydrocarbons between the second and third sections of the column at a molar ratio of isobutyl: methanol equal to 1: (1-1.02), to obtain the target product in vice bottoms.
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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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IT21032/81A|IT1137527B|1981-04-10|1981-04-10|PROCEDURE FOR THE PREPARATION OF TERTIARY ALCHYL ETHERS|

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