A kind of preparation method of methyl tert-amyl ether

A technology of methyl tert-amyl ether and methanol, which is applied in the field of preparation of methyl tert-amyl ether, can solve the problems of increased by-products, increased side reactions of oligomerization, corrosion of equipment, etc., to improve specific surface area, reduce loss rate, The effect of improving stability

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are mainly reflected in: ①The stability of the resin catalyst is poor. When the temperature rises (greater than 373.15K), the sulfonic acid group is easy to fall off, causing the catalyst to be deactivated, corroding the equipment and polluting the product; ②As the temperature rises High, the selectivity of the resin catalyst becomes poor, the side reactions of oligomerization increase, and the by-products increase; ③ In order to improve the conversion rate of olefins and suppress side reactions in industry, a higher alcohol-ene ratio is often used, resulting in the need for higher energy consumption. Realize the recycling of alcohol

Method used

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  • A kind of preparation method of methyl tert-amyl ether
  • A kind of preparation method of methyl tert-amyl ether
  • A kind of preparation method of methyl tert-amyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Preparation of DNW-Ⅱ strong acid cation exchange resin:

[0047] There are many preparation methods for DNW-II type temperature-resistant strong acid cation exchange resin catalysts, and the resin catalysts prepared according to the methods in the prior art are applicable to the present invention. The resin catalysts in this embodiment adopt polymerization, extraction, chlorination, The five-step preparation of sulfonation and stabilization of active groups is as follows: polymerize to obtain styrene-divinylbenzene copolymer microspheres, swell, mix the swollen copolymer with benzene, and stir and extract at 180°C and 2.0MPa 16h, cool down, discharge benzene, then place the copolymer in absolute ethanol for extraction treatment under the same conditions, wash, chlorinate, sulfonate, and stabilize active groups in turn on the purified copolymer to obtain DNW-II Type temperature resistant strong acid cation exchange resin catalyst.

[0048] (2) Pretreatment of DNW-Ⅱ ...

Embodiment 2

[0051] Except that ethanol and n-butanol were used instead of isopropanol and sec-butanol in (2), other conditions were the same as in Example 1.

Embodiment 3

[0053] Except that ethanol and isopropanol were used instead of isopropanol and sec-butanol in (2), other conditions were the same as in Example 1.

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Abstract

The present invention provides a methyl tert-amyl ether preparation method. According to the present invention, a strong acid cation exchange resin catalyst suitable for catalyzing the etherificationbetween C5 olefin and methanol is placed into a low-carbon alcohol solution and is subjected to high-temperature high-pressure treatment, such that the specific surface and the pore size structure ofthe resin can be improved, and the stability and the selectivity of the sulfonic cation exchange resin catalyst can be improved; and the methyl tert-amyl ether is prepared at a temperature of 80-200 DEG C under a pressure of 0.1-4.0 MPa by using C5 olefin and methanol as raw materials, such that the continuous production can be achieved, the advantages of high conversion rate, good stability and the like can be provided, and the method is the new environmentally friendly process.

Description

technical field [0001] The invention relates to a method for preparing methyl tert-amyl ether by using a modified cation exchange resin as a catalyst. Background technique [0002] With the development of human society, countries around the world have paid more and more attention to environmental protection. In order to reduce the pollution of automobile exhaust, the demand for unleaded, oxygen-containing, and high-octane gasoline has soared. Especially in 1990, the United States promulgated the Clean Air Law Amendment Since CAA, in order to meet the requirements of environmental protection, refineries in various countries have vigorously developed reformulated gasoline. [0003] Methyl tert-amyl ether (TAME) (oxidative octane number RON is 105, engine octane number MON is 100) is another after methyl tert-butyl ether (MTBE) (RON is 117, MON is 102) Ideal oxygenate for the production of unleaded, oxygenated and high-octane reformulated gasoline. Although the octane number ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/04C07C41/06
Inventor 霍稳周邓玉媛李花伊张宝国刘野
Owner CHINA PETROLEUM & CHEM CORP
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