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Preparation method of pentaerythritol tetraacetate

A pentaerythritol tetraacetate and pentaerythritol technology are applied in the field of preparing and synthesizing pentaerythritol tetraacetate, which can solve the problems of high temperature performance damage of oil products, and achieve the effects of low product, low hydroxyl value and low acid value

Inactive Publication Date: 2018-06-22
江苏雷蒙新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Pentaerythritol tetraacetate, as a base oil formula for synthetic engine oil, must have strict requirements on its quality. The pentaerythritol fatty acid ester produced by the previous invention patents (publication numbers 103539664A, 104447453A, 103649040A) has three key indicators: : The acid value, hydroxyl value and water content are all high, and it will cause fatal damage to the high temperature performance of the oil when applied to the base oil formula

Method used

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  • Preparation method of pentaerythritol tetraacetate
  • Preparation method of pentaerythritol tetraacetate
  • Preparation method of pentaerythritol tetraacetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 1.0kg of solid pentaerythritol (a sample provided by Jiangsu Yixing Sanmu Chemical Industry Co., Ltd.) and 2.5kg of industrial acetic acid into a 5L reactor (equipped with a packing column), start stirring, then add 7g of concentrated sulfuric acid and 400mL of isopropyl acetate, and heat up. Start the esterification reaction. The esterification water produced during the reaction process is continuously separated from the lower part of the water separator after being condensed with the evaporation of isopropyl acetate, and the isopropyl acetate in the upper layer is refluxed to the esterification kettle. The esterification was carried out for 8 hours, and basically no water was generated in the reaction, and the esterification reaction reached the end point, and the reaction was stopped.

[0034] The material is transferred to the deacidification kettle, and the vacuum pump is turned on to remove excess acetic acid and isopropyl acetate, which can be reused in the a...

Embodiment 2~6

[0038] Embodiment 2~6: with reference to embodiment 1, catalyst, water-carrying agent, lye parameter are as shown in the table below:

[0039]

[0040] The relevant index of the pentaerythritol tetraacetate of gained is shown in the following table:

[0041]

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Abstract

The invention discloses a preparation method of pentaerythritol tetraacetate and belongs to the field of chemical engineering. According to the method, a high-quality pentaerythritol tetraacetate product is obtained by taking pentaerythritol as a raw material through a series of processes of esterifying, deacidifying, acylating, alkali-washing, water-washing, decoloring, dehydrating, filtering andthe like. The product indexes are as follows: the content is more than or equal to 99.0 percent, the hydroxyl value is less than or equal to 1.0 mgKOH / g, the water content is less than or equal to 0.10 percent, the acid value is less than or equal to 0.1 mgKOH / g, the saponification value is 730 to 740 mgKOH / g, and the melting point is 79 to 81 DEG C. The pentaerythritol tetraacetate product produced by the method has low acid value, low hydroxyl value and low water content and can be applied to a formula of a high-quality base oil. The method has important reference value on industrial production of fatty acid ester of pentaerythritol.

Description

technical field [0001] The invention relates to a method for preparing and synthesizing pentaerythritol tetraacetate by reacting pentaerythritol and acetic acid, belonging to the field of chemical industry. Background technique [0002] Pentaerythritol is a very important organic chemical raw material, which is widely used in the coating industry to produce alkyd resin, synthesize high-grade lubricants, plasticizers, surfactants, medicines, explosives, etc. [0003] Due to the special molecular structure, the fatty acid ester of pentaerythritol has many ester groups and no active hydrogen atom at the β position, which makes it have excellent thermal stability and oxidation resistance. Therefore, pentaerythritol has excellent high and low temperature performance and high flash point. , low pour point, high boiling point, can be used as the base oil formula of engine oil, high temperature chain oil, refrigeration oil and lubricating oil. [0004] Pentaerythritol tetraacetate,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/21C10M129/74C10M105/38C10N30/06
CPCC10M105/38C10M129/74C07C67/08C07C69/21C10N2030/06C07C69/675
Inventor 周建安周永芳王明周虹陈平
Owner 江苏雷蒙新材料有限公司
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