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Preparation method of diisooctyl dithiophosphate zinc salt

A technology of zinc diisooctyl dithiophosphate and zinc isooctyl dithiophosphate, applied in the field of preparation of zinc diisooctyl dithiophosphate with low acid value, can solve the problem of affecting the anti-corrosion performance of hydraulic oil and corrosion resistance, affect the anti-emulsification performance and filterability of hydraulic oil, affect the filterability and anti-emulsification of hydraulic oil, etc., to achieve the effect of improving performance, reducing acid value, and expanding the scope of application

Active Publication Date: 2017-11-03
XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

Usually, the acid value can be reduced by increasing the proportion of basic salt, but the increase of the proportion of basic salt will affect the anti-emulsification performance and filterability of hydraulic oil
For example, in patent CN1144223A, concentrated ammonia water is used as an accelerator, and the pH value is increased by increasing the proportion of basic salt in T203. Although this method can improve the corrosion resistance of the product, it will affect the filterability and emulsification resistance of hydraulic oil. ; In the patent CN1070407A, T203 is prepared by adding phosphorus pentasulfide in batches. Although the hydrolysis stability of the product is improved, the acid value is relatively high due to the low pH value, which will affect the anti-rust performance and corrosion resistance of the hydraulic oil.

Method used

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  • Preparation method of diisooctyl dithiophosphate zinc salt

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preparation example Construction

[0038] The invention provides a kind of preparation method of zinc diisooctyl dithiophosphate, comprising the following steps:

[0039] A) After reacting isooctyl alcohol, phosphorus pentasulfide and zinc oxide, a reaction intermediate system is obtained;

[0040] B) After cooling down the reaction intermediate system obtained in the above steps, adding an organic amine to react again to obtain zinc diisooctyl dithiophosphate.

[0041] In the invention, firstly, after reacting isooctanol, phosphorus pentasulfide and zinc oxide, a reaction intermediate system is obtained.

[0042] The present invention does not have special limitation to the addition amount of described isooctyl alcohol and phosphorus pentasulfide, can get final product with the routine consumption of this type of reaction well known to those skilled in the art, and those skilled in the art can select according to actual production situation, quality requirement and product requirement. Adjustment, the molar r...

Embodiment 1

[0086] Add 500kg of isooctyl alcohol into the reaction kettle as a base material, add 1000kg of solid phosphorus pentasulfide, and stir to form a slurry. Gradually add 1865 kg of isooctyl alcohol into the reactor, and keep the temperature at 100-105°C. After adding iso-octanol, maintain 110° C. for 1 hour, and filter to obtain 3184 kg of sulfuric acid.

[0087] Add 400kg of the last batch of finished products into the reaction kettle as a base material, add 412kg of zinc oxide and stir at high speed to disperse into a uniform slurry and heat up to 50°C, then slowly add 3187kg of sulfuric acid to maintain the temperature in the kettle at 90-110°C. After adding sulfuric acid, keep the temperature at 105°C for 2 hours, then cool down to 50°C and add 9.5kg of triethylamine to neutralize the free sulfuric acid, continue to react for 20min, vacuum remove the water generated by the reaction and triethylamine not involved in the reaction. Ethylamine. Directly filter to obtain produc...

Embodiment 2

[0090] Add 500kg of isooctyl alcohol into the reaction kettle as a base material, add 1000kg of solid phosphorus pentasulfide, and stir to form a slurry. Gradually add 1865 kg of isooctyl alcohol into the reactor, and keep the temperature at 100-105°C. After adding iso-octanol, the reaction was maintained at 110° C. for 1 hour, and 3187 kg of phosphoric acid was obtained by filtration.

[0091] Add 400kg of the last batch of finished products into the reaction kettle as a base material, add 412kg of zinc oxide and stir at a high speed to disperse into a uniform slurry and heat up to 50°C, then slowly add 3187kg of sulfuric acid and 9.5kg of triethylamine respectively to maintain the kettle The internal temperature is 90-110°C. After the sulfuric acid was added, the temperature was maintained at 105°C for 2 hours, and the water generated by the reaction and triethylamine not involved in the reaction were removed in a vacuum. Directly filter to obtain product 3895kg, i.e. zinc...

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Abstract

The invention provides a preparation method of diisooctyl dithiophosphate zinc salt. The preparation method of the diisooctyl dithiophosphate zinc salt comprises the following steps: performing reaction on isooctanol, phosphorus pentasulfide and zinc oxide to obtain a reaction intermediate system; cooling the reaction intermediate system obtained in the step, adding organic amine and reacting again to obtain the diisooctyl dithiophosphate zinc salt. The organic amine is added in the specific step of the production process to neutralize free thio-phosphoric acid, so the acid value of the product is reduced and the performance of the product is improved; addition of the organic amine can ensure that the T203 product has proper viscosity and zinc content, the diversified requirement of the T203 can be met and the application range is enlarged; meanwhile, the basic salt content of the prepared diisooctyl dithiophosphate zinc salt product is low, the production process of the main body is not changed, an aftertreatment improvement mode is adopted, and the process is simple and suitable for large-scale industrialized production.

Description

technical field [0001] The invention belongs to the technical field of antioxidant and anticorrosion agents for lubricating oil, and relates to a method for preparing zinc diisooctyl dithiophosphate, in particular to a method for preparing zinc diisooctyl dithiophosphate with low acid value . Background technique [0002] The concept of lubricating oil additives is to add one or several compounds in the lubricant to make the lubricant obtain some new characteristics or improve some existing characteristics of the lubricant. According to the function, the additives mainly include antioxidants, antiwear agents, friction modifiers (also known as oily agents), extreme pressure additives, detergents, dispersants, foam inhibitors, anti-corrosion and anti-rust agents, flow point improvers, and viscosity index enhancers. types of agents. [0003] Among many additives, anti-oxidant and anti-corrosion agent is one of the important additives. Its role is to improve the oxidation stab...

Claims

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Application Information

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IPC IPC(8): C07F9/17
CPCC07F9/17
Inventor 郭春萱罗明徐坤范金凤乔庆文
Owner XINXIANG RICHFUL LUBE ADDITIVE CO LTD
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