阅读说明：本技术 一种高抗氧性能的季戊四醇硬脂酸酯制备方法 (Preparation method of pentaerythritol stearate with high oxygen resistance ) 是由 张典华 曹明磊 于 2019-11-11 设计创作，主要内容包括：本发明属于季戊四醇硬脂酸酯制备技术领域,尤其涉及一种高抗氧性能的季戊四醇硬脂酸酯制备方法。包括以下步骤：首先将季戊四醇和硬脂酸在催化剂的作用下部分酯化,制得季戊四醇硬脂酸酯；将季戊四醇硬脂酸酯与3-(3,5-二叔丁基-4-羟基苯基)丙酸甲酯在催化剂催化的条件下进行酯交换反应制得高抗氧性能的季戊四醇硬脂酸酯。与现有技术相比,本发明的优点和积极效果在于,本发明提供一种高抗氧性能的季戊四醇硬脂酸酯,通过酯交换反应,在季戊四醇硬脂酸酯分子中引入3-(3,5-二叔丁基-4-羟基苯基)丙酸基团,使所制得的季戊四醇硬脂酸酯的抗氧性能明显得到提升,进而提高了终端产品的使用寿命。(The invention belongs to the technical field of pentaerythritol stearate preparation, and particularly relates to a preparation method of pentaerythritol stearate with high oxygen resistance. The method comprises the following steps: firstly, pentaerythritol and stearic acid are partially esterified under the action of a catalyst to prepare pentaerythritol stearate; pentaerythritol stearate and 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate are subjected to ester exchange reaction under the catalysis of a catalyst to prepare the pentaerythritol stearate with high oxygen resistance. Compared with the prior art, the invention has the advantages and positive effects that the invention provides the pentaerythritol stearate with high oxygen resistance, and 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid groups are introduced into the pentaerythritol stearate molecules through ester exchange reaction, so that the oxygen resistance of the prepared pentaerythritol stearate is obviously improved, and the service life of a terminal product is further prolonged.)

1. A preparation method of pentaerythritol stearate with high oxygen resistance is characterized by comprising the following steps:

a. firstly, pentaerythritol and stearic acid are prepared into pentaerythritol stearate under the action of a catalyst;

b. pentaerythritol stearate and 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate are subjected to ester exchange reaction under the catalysis of monobutyl tin oxide to prepare the pentaerythritol stearate with high oxygen resistance.

2. The method for preparing pentaerythritol stearate with high oxygen resistance according to claim 1, wherein the molar ratio of the added pentaerythritol to the added stearic acid in the step a is 1: 3.

3. The method for preparing pentaerythritol stearate with high oxygen resistance according to claim 2, wherein in the step a, the catalyst is one or a mixture of p-toluenesulfonic acid, stannous chloride and stannous oxalate.

Technical Field

The invention belongs to the technical field of pentaerythritol stearate preparation, and particularly relates to a preparation method of pentaerythritol stearate with high oxygen resistance.

Background

The paraffin lubricant is an increasingly exhausted petroleum product, the degradation rate of the paraffin lubricant in the nature is only 10% -33%, and the pollution to soil and underground water is over 100 years, therefore, the ester lubricating oil based on natural animal and vegetable oil becomes an ideal substitute of the paraffin lubricant due to the advantages of reproducibility, easy biodegradation, excellent lubricating performance and the like. The pentaerythritol stearate based on animal and vegetable oil can be widely applied to high polymer materials such as plastics, rubber and the like as a high-grade lubricant.

At present, the existing pentaerythritol stearic acid is mainly prepared by two production routes of pentaerythritol stearate through the catalytic reaction of pentaerythritol and stearic acid or the reaction of pentaerythritol and octadecanoyl chloride. Because the processing temperature of the current high polymer materials is continuously improved, the high oxygen resistance becomes an important index, and the oxygen resistance of the pentaerythritol stearic acid synthesized according to the existing synthesis process of the pentaerythritol stearic acid can only be expressed by moderate performance, so that the market competitiveness of the pentaerythritol stearic acid with high oxygen resistance is provided.

Disclosure of Invention

Aiming at the technical problem that pentaerythritol stearic acid lacks certain antioxidant performance, the invention provides a preparation method of pentaerythritol stearate with high antioxidant performance, which is reasonable in design, simple in method and capable of effectively improving pentaerythritol stearic acid.

In order to achieve the purpose, the invention adopts the technical scheme that the invention provides a preparation method of pentaerythritol stearate with high oxygen resistance, which comprises the following steps:

a. firstly, pentaerythritol and stearic acid are prepared into pentaerythritol stearate under the action of a catalyst;

b. pentaerythritol stearate and 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) methyl propionate are subjected to ester exchange reaction under the catalysis of monobutyl tin oxide to prepare the pentaerythritol stearate with high oxygen resistance.

Preferably, in the step a, the addition amount of pentaerythritol and stearic acid is 1:3 in a molar ratio.

4. Preferably, in the step a, the catalyst is one or a mixture of several of p-toluenesulfonic acid, stannous chloride and stannous oxalate.

Compared with the prior art, the invention has the advantages and positive effects that,

1. the invention provides pentaerythritol stearate with high oxygen resistance, wherein 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid groups are introduced into pentaerythritol stearate molecules through ester exchange reaction, so that the oxygen resistance of the prepared pentaerythritol stearate is obviously improved, and the service life of a terminal product is further prolonged.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the following examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.