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A kind of preparation method of methyl tert-amyl ether and a kind of upgrading method of light gasoline

A technology of methyl tert-amyl ether and light gasoline, which is applied in the fields of ether preparation, chemical instruments and methods, addition of unsaturated compounds to ether, etc., which can solve the problems of low catalytic activity, easy falling off of catalyst sulfonic acid groups, and catalyst heat loss. Low stability and other issues, to achieve the effect of high reactivity

Active Publication Date: 2020-09-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cation exchange resin has the following disadvantages as a catalyst: on the one hand, the thermal stability of the catalyst is low, and the sulfonic acid group of the catalyst is easy to fall off, which leads to low catalyst activity.
These three types of catalysts have their own advantages, but they all have the problem of low catalytic activity.

Method used

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  • A kind of preparation method of methyl tert-amyl ether and a kind of upgrading method of light gasoline
  • A kind of preparation method of methyl tert-amyl ether and a kind of upgrading method of light gasoline
  • A kind of preparation method of methyl tert-amyl ether and a kind of upgrading method of light gasoline

Examples

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preparation example Construction

[0026] According to the present invention, the preparation method of described methyl tert-amyl ether comprises:

[0027] Under etherification reaction conditions, methanol and isopentene are contacted with an etherification catalyst to obtain a reaction product containing methyl tert-amyl ether;

[0028] Described etherification catalyst is polymer supported ionic liquid catalyst, and this catalyst has the structure shown in formula (I) or formula (P):

[0029]

[0030]In formula (I), m is an integer of 50-200, n1 and n2 are each independently an integer of 30-100, X - from HSO 4 - 、CF 3 SO 3 - 、CH 3 SO 3 - and p-CH 3 C 6 h 4 SO 3 - one or more of

[0031] Preferably, in formula (I), m is an integer of 50-150, n1 and n2 are each independently an integer of 30-70, and X - for HSO 4 - or CF 3 SO 3 - ;

[0032] Preferably, in formula (I), n1:n2 is 1:0.9-1.1.

[0033] In formula (П), m' is an integer of 50-200, n1' and n2' are each independently an intege...

preparation Embodiment 1

[0101] This preparation example is used to illustrate the preparation of etherification catalyst.

[0102] Add 527mg chain transfer reagent CPBD (2.385mmol) and 130mg AIBN (0.795mmol) to a 100mL Schlenk bottle first, then add 39.7g styrene, close the system, pump air for 10min after freezing in liquid nitrogen, thaw in cold water with nitrogen, repeat Refrigerate and ventilate three times, put the thawed Schlenk bottle into an oil bath preheated to 80°C, and polymerize for 11 hours. The reaction was quenched with liquid nitrogen, and the crude product was analyzed by NMR after thawing at room temperature, and the conversion rate of styrene was calculated to be 56.7%. Dilute the reaction solution with THF, and reprecipitate three times in anhydrous methanol to obtain a pink powder polystyrene PS 91 18.483 g.

[0103] Add 10 g of PS to a 100 mL Schlenk tube 91 (1.032mmol), 56mg AIBN (0.344mmol) and 13.087g of 4-vinylpyridine (123.84mmol), then add 15mL DMF and stir to dissol...

preparation Embodiment 2

[0107] This preparation example is used to illustrate the preparation of etherification catalyst.

[0108] Prepare the etherification catalyst according to the method of Preparation Example 1, the difference is: in the step of loading the acidic active center on the zwitterionic catalyst precursor, add the catalyst precursor PS 91-46-47 2g (0.067mmol ), install a constant pressure dropping funnel and a reflux condensing device, close the system, pump and change the air three times, add 40mL of dry dichloromethane under nitrogen protection, put it into an oil bath preheated to 40°C, stir for 1h, and then add dropwise 2.8ml (31.47mmol) of trifluoromethanesulfonic acid, stirred and reacted for 24h, reprecipitated the reaction solution in anhydrous ether, filtered with suction, and dried in vacuum to obtain 1.83g of catalyst PS91-46-47CF 3 SO 3 - .

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Abstract

The invention discloses a tert-amyl methyl ether preparation method and a light gasoline modification method. The tert-amyl methyl ether preparation method comprises that methanol and isopentene contact an etherification catalyst under an etherification reaction condition to obtain the reaction product containing tert-amyl methyl ether, wherein the etherification catalyst is a polymer supported ionic liquid catalyst, and has a structure represented by a formula (I) or a formula (II). With the method of the present inventin, the tert-amyl methyl ether preparation reaction can maintain the highreactivity.

Description

technical field [0001] The invention relates to an etherification reaction, in particular to a method for catalyzing the etherification of isopentene, an important component of olefins in light gasoline, to prepare methyl tert-amyl ether, and a method for upgrading light gasoline. Background technique [0002] Methyl tert-amyl ether is a kind of oxygen-containing ether compounds with high octane number and low vapor pressure. Similar to methyl tert-butyl ether, methyl tert-amyl ether (TAME) can be used as a gasoline additive to effectively improve gasoline quality, improve gasoline anti-violence and environmental performance, and is used to produce unleaded, oxygen-containing, high-octane gasoline. Ideal blending component for future clean gasoline. Under the condition that methyl tert-butyl ether is limited due to factors such as environmental protection and raw materials, the market demand for methyl tert-amyl ether increases rapidly. In addition, isopentene, the raw mat...

Claims

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Application Information

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IPC IPC(8): C07C41/06C07C43/04B01J31/06
CPCB01J31/06B01J2231/32C07C41/06C07C43/046
Inventor 李佳常卫星李靖温朗友
Owner CHINA PETROLEUM & CHEM CORP
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