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Ashless antioxidant lubricating oil additive, compound lubricating oil additive and lubricating oil composition containing same

A lubricating oil additive and anti-oxidation technology, applied in lubricating compositions, additives, petroleum industry, etc., can solve the problems of increased mechanical wear, increased viscosity, increased acidity, etc. Oxidizing properties, effects on deposit formation control

Inactive Publication Date: 2020-06-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this field, hindered phenolic antioxidants and aromatic amine antioxidants are usually used as antioxidant components of lubricating oils, but when hindered phenolic antioxidants or aromatic amine antioxidants are used in lubricating oils, As the use time prolongs, they will continue to be consumed. Once they are exhausted, the quality of lubricating oil will change drastically, such as increased acidity, increased viscosity, and increased deposits, resulting in increased mechanical wear and even damage.

Method used

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  • Ashless antioxidant lubricating oil additive, compound lubricating oil additive and lubricating oil composition containing same
  • Ashless antioxidant lubricating oil additive, compound lubricating oil additive and lubricating oil composition containing same
  • Ashless antioxidant lubricating oil additive, compound lubricating oil additive and lubricating oil composition containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0079] See Table 1 for the composition and content of the ashless antioxidant lubricating oil additive. In Table 1, RHY***: product grade of China Petroleum Lubricating Oil Company.

[0080] Table 1 Ashless Antioxidant Lubricating Oil Additive Embodiment Table

[0081] components Example 1 Example 2 (1) Dibutyldithiocarbamate (RHY512) 0.02％ 0.05％ (2) Isooctyl 3,5-di-tert-butyl-4-hydroxyphenylpropionate (RHY505) 0.15％ 0.10％ (3) Butyloctyldiphenylamine (RHY530) 0.15％ 0.15％ (4) Octylated N-phenyl-a-naphthylamine (RHY532) 0.03％ 0.05％ Total weight of lubricant 0.35％ 0.35％

[0082] The ashless anti-oxidation lubricating oil additive of the present invention can play an excellent anti-oxidation effect when used in various lubricating base oils. While effectively prolonging the oxidation induction period of the oil, it can well control the adverse effects of the acid value increase and viscosity increase caused by the oxidation of t...

Embodiment 3-4

[0084] The ashless antioxidant lubricating oil additives prepared in Example 1 and Example 2 were added to HVIW H150 base oil (from Daqing Petrochemical) at a ratio of 0.35%, respectively, to obtain Example 3 and Example 4.

[0085] Rotating oxygen bomb method (SH / T 0193), pressurized differential scanning calorimetry (PDSC) (SH / T 0719), rapid oxidation stability test method (PetroOxy) (ASTM D7545), static oven oxidation test method ( Self-constructed method, observe the appearance of the oil after testing at 175°C for 96 hours, test the viscosity increase and acid value of the oil at 100°C) to evaluate its anti-oxidation performance, the results are shown in Table 2.

Embodiment 5

[0093] See Table 3 for the components and contents of the ashless antioxidant additive compositions of Example 5, Example 6, Example 7, and Example 8. In Table 3, RHY***: product grade of China Petroleum Lubricating Oil Company.

[0094] Table 3 Ashless Antioxidant Additive Composition Embodiment Table

[0095]

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PUM

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Abstract

The invention discloses an ashless antioxidant lubricating oil additive. The ashless antioxidant lubricating oil additive comprises the following components: A, dialkyl dithio-carbamate; B: hindered phenol ester; C, alkylated diphenylamine; and D: an N-phenyl-a-naphthyl amine compound. The additive can significantly improve the oxidation problem of lubricating oil, and has an excellent ashless antioxidant effect. The invention also provides a composite lubricating oil additive prepared from the ashless antioxidant lubricating oil additive, which can also significantly improve the oxidation problem of lubricating oil and has an excellent ashless antioxidant effect. In addition, the invention also provides a lubricating oil composition containing the additives, and the lubricating oil composition has an excellent ashless antioxidant effect and a long service life.

Description

technical field [0001] The invention belongs to the field of lubricating oil additives, and relates to an ashless antioxidant lubricating oil additive, a composite lubricating oil additive, and a lubricating oil composition containing these additives. These additives all have excellent antioxidant effects. In lubricants, it can effectively control the increase of acid value, viscosity growth and deposit formation in the oil, effectively prolonging the service life of the oil. Background technique [0002] One of the main reasons why lubricants lose their effectiveness is oxidative degradation. One or more antioxidants are usually added to various lubricants currently produced to improve their oxidation stability and enhance their performance. The substances produced by the oxidation of lubricating oil not only reduce its performance, but also shorten its service life. At the same time, it will also cause wear to the lubricating parts used. Hydrocarbons exposed to oxygen and...

Claims

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Application Information

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IPC IPC(8): C10M141/08C10M163/00C10M169/04C10N30/04C10N30/10C10N30/06
CPCC10M141/08C10M163/00C10M169/045C10M2207/127C10M2207/144C10M2207/289C10M2215/064C10M2215/065C10M2215/086C10M2215/28C10M2219/044C10M2219/066C10M2219/106C10M2223/045
Inventor 薛卫国赵正华周旭光李涛
Owner PETROCHINA CO LTD
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