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Preparation method and application of bisphenol antioxidant based on mixed base catalyst catalysis

A technology of catalyst and mixed alkali, which is applied in the field of antioxidant products and its preparation, can solve problems such as unfavorable industrial production, harsh reaction conditions, and complicated post-processing, and achieve scientific and reasonable route design, short reaction cycle, and reduced pollutant discharge. Effect

Active Publication Date: 2017-08-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Though this technology product yield is higher (can reach 91%), it also has some defects, such as long reaction time, post-processing complexity etc.
[0010] In summary, the existing synthetic techniques of bisphenol compound antioxidants basically have the disadvantages of harsh reaction conditions, difficult operation, difficult post-processing, serious environmental pollution, and unfavorable industrial production.

Method used

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  • Preparation method and application of bisphenol antioxidant based on mixed base catalyst catalysis
  • Preparation method and application of bisphenol antioxidant based on mixed base catalyst catalysis
  • Preparation method and application of bisphenol antioxidant based on mixed base catalyst catalysis

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preparation example Construction

[0046] In the preparation method of the present invention, the reaction is carried out in a closed reactor, and the reaction system carries out the condensation reaction in a closed state, which can effectively avoid the oxidation of the alkylphenol raw material and the aldehyde compound and the oxidation of the bisphenol compound product, The finally obtained bisphenol compound product is off-white crystal.

[0047] A typical application of the bisphenol compound antioxidant of the present invention is as an additive in lubricating oil compositions, but it can also be used in other applications. Further, some embodiments of the present invention disclose a lubricating oil composition, which contains the bisphenol compound antioxidant, and may also include one or more of the following components, such as lubricating Oil base stock, detergent and dispersant, antiwear agent, zinc dialkyldithiophosphate, alkylated diphenylamine, viscosity index improver, pour point depressant, co...

Embodiment 1

[0051] Add 14.63g of paraformaldehyde, 20g of 2-tert-butyl p-cresol (4:1 molar ratio), 1.92g of mixed base catalyst sodium tetramethoxyborate and 360ml of dimethyl sulfoxide (DMSO) into the belt In a thick-walled pressure-resistant glass bottle with magnets, set the temperature to 150° C., raise the temperature to the set temperature, and stir for 0.5 hours to react. After the reaction, add any one of the aforementioned organic acids (such as acetic acid) to the flask for neutralization, after adding deionized water, the product precipitates, and the product 2,2'-methylene-bis(4-methyl- 6-tert-butylphenol). The product yield is greater than 95%, and the product purity is greater than 98%.

Embodiment 2

[0053] Add 23.2g of paraformaldehyde, 25.5g of 2-tert-butyl-p-cresol (5:1 molar ratio), 1.10g of mixed base catalyst lithium tetramethoxyborate and 310ml of DMSO into the thick-walled In a pressure-resistant glass bottle, the set temperature is 100° C., the temperature is raised to the set temperature, and the reaction is stirred for 2 hours. After the reaction finishes, the aftertreatment of the reaction product is the same as in Example 1. The product yield is greater than 95%, and the product purity is greater than 98%.

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Abstract

The invention discloses a mixed base catalyst catalysis-based bisphenol anti-oxidant preparation method and use. The preparation method comprises putting dialkyl-substituted phenol and an aldehyde compound into an enclosed reactor, carrying out a reaction process on the mixture in the presence of a mixed base catalyst under the condition of use or no use of an organic solvent and carrying treatment on the reaction product to obtain a bisphenol anti-oxidant after the reaction. The bisphenol anti-oxidant can be used for preparation of a lubricating oil composition, a fuel oil composition or an inhibitor of plastic and rubber. The preparation method of the bisphenol anti-oxidant has simple processes and mild conditions, utilizes cheap and easily available raw materials with a wide source, has a short reaction period, is convenient for control, has high technical safety, low production energy consumption, a high yield and high product purity, can effectively control and reduce pollutant discharge and is a novel technology with advantages of safety, energy saving and environmental friendliness.

Description

technical field [0001] The invention relates to an antioxidant product and a preparation method thereof, in particular to a preparation method and application of a bisphenol antioxidant based on mixed alkali catalyst catalysis. Background technique [0002] Lubricating oil refers to liquid or semi-solid lubricants used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the roles of lubrication, cooling, rust prevention, cleaning, and sealing. Lubricating oil is usually composed of base oil and additives. Base oil is the main component of lubricating oil and determines the basic performance of lubricating oil. Additives can make up for and improve the performance of base oil. On the one hand, additives can impart properties or performances that the base oil itself does not have, such as anti-foaming, demulsification, etc.; on the other hand, it can also improve the original properties or prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/20C07C39/16
CPCC07C37/20C07C39/16
Inventor 刘升高马玉杰王立敏俞莎莎冯建湘王志刚曾红玲
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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