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Preparation method of isobutyl vinyl ether

A technology of isobutyl vinyl ether and isobutanol, which is applied in the direction of ether preparation, unsaturated compound addition to ether, ether separation/purification, etc., can solve the problem of low gas-liquid mass transfer efficiency in spray tower, reactor transfer, etc. Problems such as poor thermal effect and large amount of catalyst are used to achieve the effect of increasing the gas-liquid mass transfer rate, reducing the amount of catalyst, and increasing the gas holdup rate

Inactive Publication Date: 2016-08-10
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas-liquid mass transfer efficiency of the spray tower is low, the amount of catalyst is large, the heat transfer effect of the reactor is poor, and there is tail gas emission containing acetylene

Method used

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  • Preparation method of isobutyl vinyl ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The reaction of acetylene and isobutanol uses figure 1 The reaction setup shown. The riser of the loop reactor has an inner diameter of 0.15m and a height of 2.5m. The gas injector is a single-head multi-hole nozzle with a diameter of 3 μm. The process operating conditions are as follows:

[0022] Catalyst dosage: 2% of the mass of isobutanol;

[0023] Isobutanol (catalyst-containing) feed flow rate 16L / h;

[0024] Mixed gas feed flow rate 15Nm 3 / h;

[0025] The volume fraction of acetylene in the feed mixed gas is 60%;

[0026] Heat exchanger temperature: 150°C;

[0027] Reaction pressure: 0.5MPa;

[0028] Results The one-pass conversion rate of isobutanol was 88%, and the selectivity of reaction to isobutyl vinyl ether was 95.5%.

Embodiment 2

[0030] The reaction of acetylene and isobutanol with figure 1 The reaction setup shown. The riser of the loop reactor has an inner diameter of 0.15m and a height of 2.5m. The gas injector is a single-head multi-hole nozzle with a pore size of 10 μm. The process operating conditions are as follows:

[0031] Catalyst dosage: 3% of the mass of isobutanol;

[0032] Isobutanol (catalyst-containing) feed flow rate 16L / h;

[0033] Mixed gas feed flow rate 15Nm 3 / h;

[0034] The volume fraction of acetylene in the feed mixed gas is 70%;

[0035] Heat exchanger temperature: 140°C;

[0036] Reaction pressure: 0.6MPa;

[0037] Results The single-pass conversion rate of isobutanol was 85.7%, and the selectivity of the reaction to isobutyl vinyl ether was 97%.

Embodiment 3

[0039] The reaction of acetylene and isobutanol with figure 1 The reaction setup shown. The riser of the loop reactor has an inner diameter of 0.15m and a height of 2.5m. The gas injector is a double-ended multi-hole nozzle with a pore diameter of 5 μm. The process operating conditions are as follows:

[0040] Catalyst consumption: 5% of the mass of isobutanol;

[0041] Isobutanol (catalyst-containing) feed flow rate 16L / h;

[0042] Mixed gas feed flow rate 15Nm 3 / h;

[0043] The volume fraction of acetylene in the feed mixed gas is 65%;

[0044] Heat exchanger temperature: 160°C;

[0045] Reaction pressure: 0.8MPa;

[0046] As a result, the single-pass conversion of isobutanol was 92%, and the selectivity of the reaction to isobutyl vinyl ether was 95%.

[0047] The invention provides a method for preparing isobutyl vinyl ether with good mass and heat transfer effect, simple device structure, safety and high efficiency, simple operation, low cost and easy industrial...

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Abstract

The preparation method of isobutyl vinyl ether relates to isobutyl vinyl ether. The isobutanol solution containing the catalyst is pumped into the loop reactor from the bottom of the riser through the metering pump, and the mixed gas of acetylene and nitrogen enters the gas injector from the bottom of the riser after passing through the gas buffer tank, compressor and adsorption drying column; The driving material flows into the downcomer from the upper part of the riser, exchanges heat with the heat transfer oil through the heat exchanger, and then circulates back to the riser, and the ejected tiny bubbles are mixed and contacted with the isobutanol solution to react to obtain a reaction mixture; the reaction mixture It flows out from the outlet at the top of the riser, and enters the gas-liquid separator for gas-liquid separation after being cooled by the cooler. The liquid coming out of the bottom is isobutyl vinyl ether. The invention has good mass and heat transfer effect, simple device structure, safety and high efficiency, simple operation, low cost and easy industrialization.

Description

technical field [0001] The invention relates to isobutyl vinyl ether, in particular to a preparation method of isobutyl vinyl ether. Background technique [0002] Isobutyl vinyl ether is an unsaturated ether compound with good reactivity, and its derivatives are widely used in coatings, inks, adhesives, plasticizers and other fields. Isobutyl vinyl ether is an important intermediate in organic synthesis, used in the preparation of medicines, pesticides and other substances; it is also an important polymerizable monomer, and can be copolymerized with many types of unsaturated compounds (such as: vinyl chloride, maleic anhydride, etc.) , to prepare special functional materials. [0003] The usual preparation method of isobutyl vinyl ether is to react acetylene and isobutanol at a certain temperature and pressure in the presence of alkali metal hydroxide or alkali metal alkoxide to generate isobutyl vinyl ether. The reaction devices used include autoclave-type stirred reactor...

Claims

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Application Information

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IPC IPC(8): C07C41/08C07C41/34C07C43/16
CPCC07C41/08C07C41/34
Inventor 黎四芳黄彬彬
Owner XIAMEN UNIV
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