Method for preparing lauryl methacrylate

A technology of methacrylic acid and lauryl ester, which is applied in the preparation of carboxylic acid esters, the preparation of organic compounds, chemical instruments and methods, etc., can solve the problems of unsatisfactory high-quality products, low product yield, dark product color, etc. To achieve the effect of deep product color, high product purity and improved product yield

Inactive Publication Date: 2011-08-10
天津市天骄化工有限公司
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Problems solved by technology

[0002] At present, the preparation and production technology of lauryl methacrylate adopts the method of normal pressure esterification, the reaction process is easy to cause material polymerization, the pro...

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  • Method for preparing lauryl methacrylate

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Embodiment Construction

[0012] In order to further understand the content of the invention, features and effects of the present invention, the following examples are given hereby, and the details are as follows:

[0013] A preparation method of lauryl methacrylate, comprising the following steps:

[0014] (1) The same as the existing atmospheric pressure esterification method, put the main ingredients of dodecyl alcohol and methacrylic acid into the esterification reaction container, and add toluene according to 50-90% of the total mass percentage of dodecyl alcohol and methacrylic acid , adding p-toluenesulfonic acid according to 1.2-4.2% of the total mass percentage of dodecyl alcohol and methacrylic acid, adding phenothiazine according to 0.3-0.5% of the total mass percentage of dodecyl alcohol and methacrylic acid, stirring for 2-9 hours, Carry out esterification reaction, obtain reaction material;

[0015] (2) Turn on the vacuum pump on the esterification reaction vessel, control the pressure i...

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Abstract

The invention discloses a method for preparing lauryl methacrylate, which comprises the following steps of: (1) putting main materials of lauryl alcohol and methacrylic acid into an esterification reaction container, adding a solvent, adding a catalyst and a polymerization inhibitor A, and performing mixing reaction to obtain a reaction material; (2) controlling the pressure in the esterification reaction container to be -0.04 to -0.08MPa, raising the temperature in the esterification reaction container until reflux flows out, keeping the temperature, and beginning cooling to normal temperature until no reflux flows out or an acid value in reaction solution is detected to be 30-50mgKOH/g; (3) transferring the reaction material to a washing container, adding alkali liquor, controlling the pH value of the reaction material to be 7-8, standing until the reaction material is layered, and discharging wastewater on the lower layer; and (4) transferring the reaction material of which the wastewater is removed to a distillation container, adding a polymerization inhibitor B, vacuumizing the distillation container, and distilling to remove methylbenzene to obtain the product. The product is high in purity, good in color, and high in yield.

Description

technical field [0001] The invention relates to a synthetic preparation technology of chemical products, in particular to a preparation method of lauryl methacrylate, which is suitable for use as a radiation curing reactive diluent. Background technique [0002] At present, the preparation and production technology of lauryl methacrylate adopts the method of normal pressure esterification, the reaction process is easy to cause material polymerization, the product color is dark, the color number is usually greater than 70, the product yield is low, and the product yield is generally lower than 70 %, which cannot meet the needs of preparing and producing high-quality products. Contents of the invention [0003] The invention provides a method for preparing lauryl methacrylate to solve the technical problems in the known technology. The method can reduce the generation of polymers, and the product has light color, high quality and high yield. [0004] The technical scheme ad...

Claims

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Application Information

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IPC IPC(8): C07C69/54C07C67/08
Inventor 黄凤岐李健
Owner 天津市天骄化工有限公司
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