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Antioxidant for hydraulic oil and preparation and application thereof

A technology of hydraulic oil and antioxidant, applied in the direction of additives, petroleum industry, lubricating composition, etc., to achieve excellent high-temperature anti-oxidation stability and improve long-term high-temperature anti-oxidation stability

Active Publication Date: 2013-07-10
上海海都化学科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used oil antioxidants include free radical chain terminators, such as phenols and amine compounds; peroxide decomposers, such as sulfides, sulfur-containing phosphorus compounds, etc.; at present, these antioxidants are still difficult to meet the above requirements

Method used

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  • Antioxidant for hydraulic oil and preparation and application thereof
  • Antioxidant for hydraulic oil and preparation and application thereof
  • Antioxidant for hydraulic oil and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The preparation of embodiment 1 antioxidant

[0067] Antioxidant was prepared according to the formula in parts by weight in Table 1.

[0068] Preparation method: Mix the raw materials evenly according to the proportion.

[0069] Table 1

[0070]

[0071] The structural formula of thiocarbamate in table 1 is (C 4 h 9 ) 2 NCS 2 CS 2 CN(C 4 h 9 ) 2 .

Embodiment 2

[0072] The performance of embodiment 2 antioxidant

[0073] Adopt neopentyl polyol dibasic acid complex ester (1# formula in embodiment 3) to mix as base oil and various antioxidants in the following table, wherein said base oil accounts for 98wt%, the amount of antioxidant The total amount accounts for 2 wt%. Mix the raw materials according to the ratio and stir evenly.

[0074] Table 2

[0075]

[0076] Note: the total amount of antioxidants is 2.0%, wherein, the structural formula of thiocarbamate is (C 4 h 9 ) 2 NCS 2 CS 2 CN(C 4 h 9 ) 2 .

[0077] As can be seen from the data in Table 2, the present invention selects the antioxidant compound compounded by diisooctyl diphenylamine, phenyl-α-naphthylamine, 2,6 di-tert-butylphenol and thiocarbamate. It achieves the complementary performance advantages of various antioxidants and greatly improves the long-term high-temperature anti-oxidation stability of oil products.

Embodiment 3

[0078] The preparation of embodiment 3 neopentyl polyol dibasic acid double ester

[0079] The preparation process is as follows:

[0080] 1. Select a dibasic acid with a carbon number of 5 to 12, add a mixed alcohol consisting of neopentyl glycol, trimethylolpropane and neopentylthritol in an amount twice the amount of the dibasic acid, and then add the substance The amount of the mixed dibasic acid is 0.95-1.05% tetraoctyl zirconate and 1.9-2.1% p-toluenesulfonic acid as a catalyst, and the reaction is stirred at a temperature of 160-180°C for 140-180 minutes to complete the first step Esterification reaction.

[0081] 2. The amount of the added substance is more than 4 times of the mixed dibasic acid, and the monobasic fatty acid with a carbon number of 14 to 20, (the monobasic fatty acid should be in excess, so that the second step of the esterification reaction is complete), at a temperature of 200-220 ° C Stir the reaction for 100 to 120 minutes to complete the second ...

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Abstract

The invention provides an antioxidant for a hydraulic cylinder, which comprises the following components in part by weight: 4 to 10 parts of diisooctyl diphenylamine, 4 to 10 parts of phenyl-alpha-naphthylamine, 5 to 10 parts of 2,6-di-tert-butyl phenol and 6 to 15 parts of thiocarbamate. The antioxidant is prepared by researching the synergistic effect among the antioxidant, a main antioxidant and an antioxidant additive, and compounding the diisooctyl diphenylamine, the phenyl-alpha-naphthylamine, the 2,6-di-tert-butyl phenol and the thiocarbamate, achieves the complementary performance advantages of a plurality of types of antioxidants, and greatly improves the long-term high-temperature antioxidant stability of oil products.

Description

technical field [0001] The invention relates to an antioxidant for hydraulic oil and its preparation and application, belonging to the technical field of industrial lubricating oil. Background technique [0002] Hydraulic machinery has been widely used in industries such as iron and steel, electric power, coal and machinery. As a power medium, hydraulic oil is the key material of hydraulic transmission technology, and it is also one of the three important oil products with the largest consumption of industrial lubricating oil. With the continuous development of modern hydraulic technology, some hydraulic systems often work under high-pressure and high-temperature conditions (for example, the hydraulic system of a steel plant is often in contact with high-temperature bodies or even open flames, and the hydraulic system of a power plant is often in contact with high-temperature steam). The thermal stability and oxidation stability of the hydraulic oil used put forward more st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M141/08C10M161/00C10N40/32C10N40/08C10N30/10C10N30/08
Inventor 王鹏汪宪臣姜作泰
Owner 上海海都化学科技有限公司
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