Glycerol tert-butyl ether preparation method

A technology of oil tert-butyl ether and tert-butyl ether, which is applied in the field of preparation of glycerol tert-butyl ether, can solve the problems of poor compatibility between isobutylene and glycerol, high energy consumption and production cost, and self-polymerization reaction of isobutylene, and achieves Fewer devices, fewer by-products, and lower self-aggregation effect

Inactive Publication Date: 2017-07-28
深圳市前海博扬研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the problems of easy loss of catalyst, easy self-polymerization of isobutene, poor compatibility of isobutene and glycerin, and gas-liquid two-phase reaction in the preparation process of glycerol tert-butyl ether in the prior art. The technical bottleneck of high energy consumption and production cost, thus providing a simple reaction, high product selectivity and environmental friendliness, easy to realize the preparation method of glycerol tert-butyl ether

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  • Glycerol tert-butyl ether preparation method

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Embodiment 1

[0021] Embodiment 1 This embodiment discloses a kind of preparation method of glycerin tert-butyl ether, and described method is as follows:

[0022] The strongly acidic ion-exchange resin catalyst is filled in a fixed-bed reactor, and the fixed-bed reactor is three tubular reactors connected in series, and the height of the reactor is 12000 mm, and the diameter is 150 mm. First enter glycerin, when glycerol passes through all reactors completely, then pass into dimerized isobutylene accounting for 10% of the total mass. Start to feed an appropriate amount of liquefied petroleum gas, the isobutene content in the liquefied petroleum gas is 27%, the space velocity is initially controlled at 2 / h, and the pressure is controlled at 1.0MPa through the exhaust and pressure reducing valve. Start the preheater, control the temperature of the fixed-bed reactor at 40°C, and keep the temperature stable, and control the feed molar ratio of isobutene and glycerol at 1.0:1.0. The mixed mate...

Embodiment 2

[0023] Embodiment 2: This embodiment discloses a kind of preparation method of glycerol tert-butyl ether, and described method is as follows:

[0024] The strongly acidic ion-exchange resin catalyst is filled in a fixed-bed reactor, and the fixed-bed reactor is three tubular reactors connected in series, and the height of the reactor is 12000 mm, and the diameter is 150 mm. First enter glycerin, when glycerol passes through all reactors completely, then pass into dimerized isobutylene accounting for 10% of the total mass. Start to feed an appropriate amount of liquefied petroleum gas, the isobutene content in the liquefied petroleum gas is 27%, the space velocity is initially controlled at 2 / h, and the pressure is controlled at 1.0MPa through the exhaust and pressure reducing valve. Start the preheater, control the temperature of the fixed-bed reactor at 60°C, and keep the temperature stable, and control the feed molar ratio of isobutene and glycerol at 1.0:1.0. The mixed mat...

Embodiment 3

[0025] Embodiment 3: This embodiment discloses a kind of preparation method of glycerin tert-butyl ether, described method is as follows:

[0026] The strongly acidic ion-exchange resin catalyst is filled in a fixed-bed reactor, and the fixed-bed reactor is three tubular reactors connected in series, and the height of the reactor is 12000 mm, and the diameter is 150 mm. First enter glycerin, when glycerol passes through all reactors completely, then pass into dimerized isobutylene accounting for 10% of the total mass. Start to feed an appropriate amount of liquefied petroleum gas, the isobutene content in the liquefied petroleum gas is 27%, the space velocity is initially controlled at 2 / h, and the pressure is controlled at 1.0MPa through the exhaust and pressure reducing valve. Start the preheater, control the temperature of the fixed bed reactor at 80°C, keep the temperature stable, and control the feed molar ratio of isobutene and glycerol at 1.0:1.0. The mixed material co...

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Abstract

The present invention belongs to the field of chemical industry preparation, and particularly relates to a glycerol tert-butyl ether preparation method, which comprises that glycerol, diisobutylene, liquefied petroleum gas and an acidic catalyst are subjected to an alkylation reaction to obtain the glycerol tert-butyl ether. According to the present invention, glycerol and isobutylene are subjected to an addition reaction under the action of a cationic acidic catalyst to form the glycerol tert-butyl ether; the process belongs to the ideal atomic economic reaction, the process route is simplified, the total number of the equipment is less, the diisobutylene is introduced into the reaction raw materials so as to reduce the isobutylene self-polymerization, the side-product is less during the whole preparation process, the viscosity of glycerol is effectively reduced, and the solubility of isobutylene in the liquid phase is increased; the process is low carbon and environmental protection, the acidic catalyst used in the reaction is non-toxic and harmless, and the production process is environmentally friendly; the enol addition etherification method can be widely used and can replace the alkyd esterification method; and the preparation method has great market prospects and great economic value.

Description

technical field [0001] The invention belongs to the field of chemical preparation, and in particular relates to a preparation method of glycerol tert-butyl ether. Background technique [0002] Glycerin tert-butyl ether is a mixture of glycerol mono-tert-butyl ether, glycerol di-tert-butyl ether and glycerol tri-tert-butyl ether (MTBG, DTBG, TTBG). Glycerin tert-butyl ether is used in diesel oil as an additive to reduce the viscosity of diesel oil, improve its low-temperature fluidity, promote its full combustion, and reduce the emission of solid particles in the exhaust gas. Therefore, glycerol tert-butyl ether is expected to become a new type of fuel additive. [0003] Glycerin tert-butyl ether is generally prepared by etherification of glycerin and tert-butanol. Acidic catalysts are often used in the reaction system, and water will be generated during the etherification process, resulting in acid loss, catalyst deactivation, and poor repeatability. At the same time, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/10C07C43/13C07C41/06
CPCC07C41/06C07C43/10C07C43/13C07C43/135
Inventor 肖阳傅兵彭威梁亚涛凌方朝蒋兵
Owner 深圳市前海博扬研究院有限公司
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