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A kind of preparation method of methyl tert-amyl ether

A technology of methyl tert-amyl ether and methyl butene, which is applied in the field of preparation of methyl tert-amyl ether, can solve the problems of increased by-products, easy detachment of sulfonic acid groups, and corrosion of equipment, so as to improve the conversion of olefins High efficiency, inhibition of side effects, good stability

Active Publication Date: 2015-09-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages are mainly reflected in: ① The 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 deactivate, corroding the equipment and polluting the product; ② As the temperature rises high, the selectivity of the resin catalyst becomes worse, oligomerization side reactions increase, and by-products increase; ③ In order to increase 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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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] In the preparation process of the above-mentioned aluminum-based composite oxide, the reaction time is 2h-20h, preferably 4h-16h, most preferably 6h-12h. The drying temperature is 90°C-150°C, preferably 100°C-140°C, most preferably 110°C-130°C. The drying time is 4h-24h, preferably 6h-16h, most preferably 10h-12h. The calcination temperature is 400°C-800°C, preferably 450°C-700°C, most preferably 500°C-600°C. The calcination time is 8h-24h, preferably 8h-14h, most preferably 8h-12h.

[0031] The formed aluminum-based composite oxide support is impregnated in a heteropolyacid solution according to a conventional impregnation method. The immersion time is 4h-24h, preferably 4h-12h, most preferably 6h-12h. The impregnation is dried at 100°C-180°C for 4h-12h, preferably at 100°C-160°C for 6h-12h, most preferably at 100°C-120°C for 6h-8h. The impregnation is calcined at 250°C-550°C for 6h-24h, preferably at 300°C-500°C for 6h-12h, most preferably at 350°C-450°C for 8h-12...

Embodiment 1

[0034] A certain amount of aluminum nitrate and a certain amount of magnesium nitrate are prepared into an aqueous solution a, and deionized water and a certain amount of potassium hydroxide are used to prepare an aqueous solution b, and the solution b is added dropwise to a under normal temperature and stirring, and the reaction After 6 hours, a white paste precipitate was obtained, which was washed, filtered, and dried at 120°C for 10 hours, then extruded according to a conventional method, and then calcined at 500°C for 8 hours to obtain a magnesium-aluminum composite oxide carrier.

[0035] Dissolve phosphomolybdic acid in deionized water, immerse the above-mentioned shaped and roasted catalyst carrier in the heteropoly solution for 12 hours, dry the impregnated material at 110°C for 12 hours, and roast at 350°C for 8 hours to obtain the catalyst. The catalyst composition is shown in Table 1.

[0036] The etherification of 2-methylbutene and methanol is carried out in a Φ1...

Embodiment 2

[0038] Other conditions are the same as in Example 1, except that the consumption of magnesium nitrate and phosphomolybdic acid is changed, the catalyst composition is shown in Table 1, and the reaction results are shown in Table 2.

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PUM

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Abstract

The invention discloses a method for preparing tert-amyl methyl ether. The method is as follows: 2-methylbutene and methanol as raw materials, a heteropolyacid / aluminium based composite oxide as a catalyst, volume space velocity of 2-methylbutene of 1.0-5.0 / h, molar ratio of methanol and 2-methylbutene of 1.0:1.0-3.0:1.0, reaction temperature of 60-120 DEG C, and reaction pressure of 0.05-3.0 MPa. Compared with the prior art, the method has the advantages of long running period, good stability and high selectivity of tert-amyl methyl ether.

Description

technical field [0001] The invention relates to a preparation method of methyl tert-amyl ether (TAME). Background technique [0002] With the development of human society, countries around the world are paying 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. 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 of TAME is slightly lower than that of MTBE, it is superior to MTBE in terms of vapor pressure and water solubility, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/04C07C41/06B01J31/26B01J31/38
CPCB01J23/002B01J23/28B01J23/30B01J27/188B01J27/19B01J37/0201B01J37/08C07C41/06C07C43/046
Inventor 霍稳周魏晓霞刘野李花伊田丹
Owner CHINA PETROLEUM & CHEM CORP
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