A kind of method for preparing 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 corrosion equipment, increase of by-products, easy falling off of sulfonic acid groups, etc., and achieve high conversion rate, Easy to operate and 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

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Effect test

preparation example Construction

[0029] In the preparation process of the above-mentioned titanium-based composite oxide, the reaction time is 3h-24h, preferably 5h-20h, most preferably 6h-12h. The drying temperature is from 100°C to 180°C, preferably from 100°C to 160°C, most preferably from 100°C to 120°C. The drying time is 8h-24h, preferably 6h-16h, most preferably 8h-12h. The calcination temperature is 400°C-600°C, preferably 400°C-550°C, most preferably 400°C-500°C. The calcination time is 8h-24h, preferably 8h-20h, most preferably 8h-16h.

[0030] The formed titanium-based composite oxide support is impregnated in a heteropolyacid solution according to a conventional impregnation method. The immersion time is 6h-24h, preferably 6h-16h, most preferably 8h-12h. The impregnation is dried at 100°C to 160°C for 6h to 12h, preferably at 100°C to 140°C for 6h to 10h, most preferably at 100°C to 120°C for 8h to 10h. The impregnated material is roasted at 350°C-650°C for 8h-24h, preferably at 400°C-550°C fo...

Embodiment 1

[0033] Prepare a certain amount of magnesium nitrate and a certain amount of titanium tetrachloride to prepare aqueous solution a, prepare potassium hydroxide alkaline solution b, add solution b dropwise to a under normal temperature and stirring state, and react for 10 hours to obtain a white paste After washing, filtering, and drying at 120°C for 10h, extruding according to the conventional method, and then calcining at 500°C for 8h to obtain a titanium-based composite oxide carrier.

[0034] Dissolve a certain amount of phosphomolybdic acid in deionized water, immerse the above-mentioned shaped and roasted catalyst carrier in the heteropoly solution for 8 hours, dry the impregnated material at 120°C for 10h, and roast at 450°C for 10h to prepare Obtain the catalyst, and the physical properties of the catalyst are shown in Table 1.

[0035] The etherification of 2-methylbutene and methanol is carried out in a Φ18mm×1200mm stainless steel fixed-bed reactor, and 30ml of the ab...

Embodiment 2

[0037] 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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Abstract

The invention discloses a method for preparing tert-amyl methyl ether. The method is as follows: raw materials of 2-methylbutene and methanol, a catalyst of a heteropolyacid / titanium based composite oxide as, volume space velocity of 2-methylbutene of 0.5-5.0 / h, molar ratio of methanol and 2-methylbutene of 1.0:1.0-5.0:1.0, reaction temperature of 80-200 DEG C, and reaction pressure of 0.5-5.0 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 discloses a method for preparing methyl tert-amyl ether (TAME). technical background [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 pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/04C07C41/06B01J27/18B01J23/28B01J27/188B01J23/30
CPCB01J27/188B01J27/19C07C41/06C07C43/046
Inventor 霍稳周魏晓霞刘野李花伊田丹
Owner CHINA PETROLEUM & CHEM CORP
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