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Preparation method for (meth)acrylate

A technology of acrylate and acrylic acid, applied in the field of preparation of acrylate, can solve the problems of reducing process efficiency, shortening life and the like

Inactive Publication Date: 2011-04-13
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In this regard, in the production process of (meth)acrylate, there are following problems: solid or liquid impurities remain in the bottom of the reactor or refiner or in the pipeline, thereby reducing the process efficiency, or interacting with the active center of the porous catalyst combine to shorten its lifespan

Method used

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  • Preparation method for (meth)acrylate
  • Preparation method for (meth)acrylate
  • Preparation method for (meth)acrylate

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Effect test

preparation example Construction

[0041] The preparation method of the (meth)acrylate may be in a batch mode or a continuous mode, and a continuous mode is preferred.

[0042] In the present invention, if impurities are generated, they will remain in the (meth)acrylic acid production equipment and reduce the production efficiency. The production equipment containing residual impurities refers to the bottom or pipeline of the reactor and the refiner.

[0043] In the present invention, the catalyst is preferably one or more selected from the following: inorganic acids, such as sulfuric acid, hydrochloric acid, phosphoric acid and nitric acid; organic acids containing sulfonic acid groups, such as methanesulfonic acid, p-toluenesulfonate Acid (pTSA) and alkyl sulfuric acid; natural / synthetic zeolite, cation and anion exchange resins; metal salts such as lithium fluoride, potassium chloride, cesium chloride, calcium chloride, iron chloride and aluminum phosphate; metal oxides , Such as heteropoly acid; and organometall...

Embodiment 1

[0051] The evaluation was performed in the same manner as in Comparative Example 1, except that hydrazine hydrate was added at a molar ratio of 2 to the total amount of furfural. The results are shown in Table 1 below.

Embodiment 2

[0053] The evaluation was performed in the same manner as in Comparative Example 1, except that hydrazine hydrate was added at a molar ratio of 3 to the total amount of furfural. The results are shown in Table 1 below.

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Abstract

The present invention provides a method for preparing (meth)acrylate by esterification reaction of reactants containing (meth)acrylic acid and alcohol in the presence of a catalyst, the preparation method for (meth)acrylate is characterized in that a hydrazine compound or derivative thereof is put into an esterification reactor; and (meth)acrylate prepared by the same. The present invention effectively prevents impurities generated by aldehyde that is contained in the raw material (meth)acrylic acid from remaining in a production apparatus and the catalyst, so that the process for producing (meth)acrylate proceeds smoothly.

Description

Technical field [0001] The present invention relates to a method for preparing (meth)acrylates, wherein the method effectively prevents impurities generated from aldehydes contained in raw material (meth)acrylic acid from remaining in production equipment and catalysts, thereby enabling the preparation ( The meth)acrylate process proceeded smoothly. [0002] This application claims the priority of Korean Patent Application No. 10-2009-0084586 filed with the Korean Intellectual Property Office on September 8, 2009, and the entire disclosure of which is incorporated herein by reference. Background technique [0003] In the preparation method of (meth)acrylates, ion exchange resins, inorganic acids, and organic acids are generally used as catalysts for the esterification reaction. [0004] In the esterification reaction, the composition of the input liquid and the output liquid in the reactor is analyzed to determine the rate of change of acrylic acid. The conversion rate of acrylic a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/08
CPCC07C67/08C07C69/54C07C67/62
Inventor 金显圭曹东铉高凖锡车京龙白世元寓东炫
Owner LG CHEM LTD
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