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Hydraulic oil composition with low viscosity and low solidifying point

A technology of hydraulic oil composition and low freezing point, which is applied in the direction of lubricating composition and petroleum industry, can solve the problems of not being able to meet the oil requirements of the equipment hydraulic system, and achieve the advantages of wide application range, simple preparation method and reasonable raw material compatibility Effect

Active Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing L-HS 10 is the hydraulic oil with the lowest low-temperature viscosity, and its kinematic viscosity at -40°C is 1500mm 2 / s, the minimum pour point is -45°C, suitable for hydraulic equipment with a service temperature of -40°C, but in the above-mentioned environment of -60°C, L-HS hydraulic oil cannot meet the oil requirements of the hydraulic system of the equipment

Method used

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  • Hydraulic oil composition with low viscosity and low solidifying point
  • Hydraulic oil composition with low viscosity and low solidifying point

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get neutral barium dinonylnaphthalene sulfonate (purchased from T705A of Suzhou Hushuguan Chemical Additive Factory) 0.01kg, 2,6-di-tert-butyl p-cresol (purchased from Nanjing Runyou Chemical Additive Co., Ltd.) 0.1kg , polymethacrylate (purchased from RohMax Additives 8-200) 5kg, and then sequentially added to 94.89kg of 40 ℃ kinematic viscosity of 2.5mm 2 / s deeply hydrogenated base oil (purchased from Ninas Company), mixed and stirred at 65°C for 1.5 hours to prepare a low-viscosity and low-freezing-point hydraulic oil composition.

[0028] Among them, the performance data of the base oil are as follows:

[0029] Table 2

[0030]

Embodiment 2

[0032] Get neutral barium dinonylnaphthalenesulfonate (purchased from T705A of Liaoning Tianhe Fine Chemical Co., Ltd.) 0.05kg, 2,6-di-tert-butyl p-cresol (purchased from Langfang Fuhai Fine Chemical Co., Ltd.) 0.5kg , polymethacrylate (purchased from RohMax Additives 8-310) 15kg, and then sequentially added to 84.45kg of 40 ℃ kinematic viscosity of 3mm 2 / s deep hydrogenated base oil (purchased from Ninas Company), mixed and stirred at 60°C for 2 hours to prepare a low-viscosity and low-freezing-point hydraulic oil composition.

Embodiment 3

[0034] Get neutral barium dinonylnaphthalene sulfonate (purchased from T705A of Suzhou Specialty Chemical Co., Ltd.) 1kg, 2,6-di-tert-butyl p-cresol (purchased from Liaoning Tianhe Fine Chemical Co., Ltd.) 1.5kg, Polymethacrylate (purchased from RohMax Additives Co. 7-310) 25kg, and then sequentially added to 72.5kg of 40 ℃ kinematic viscosity of 4.0mm 2 / s deeply hydrogenated base oil (purchased from Ninas Company), mixed and stirred at 70°C for 3 hours to prepare a low-viscosity and low-freezing-point hydraulic oil composition.

[0035] The freezing point comparison of table 3 embodiment and comparative example

[0036] components

[0037] The comparative example is a commercially available hydraulic oil with a viscosity grade of L-HS of 10.

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Abstract

The invention provides a hydraulic oil composition with low viscosity and low solidifying point, which comprises the following ingredients by weight percentage: 0.01-1% of neutral dinonyl naphthalene sulfonic acid barium, 0.1-1.5% of 2,6-di-tert-butyl p-cresol, 5-25% of polymethacrylate and 72-95% of deeply hydrodearomatized base oil. The hydraulic oil composition with low viscosity and low solidifying point has excellent low temperature performance which comprises low pour point and low kinematic viscosity. Without adding a pour point depressant, the pour point is -76 DEG C (GB / T 1995), the kinematic viscosity at the temperature of -40 DEG C is 367 mm<2> / s, and the kinematic viscosity at the temperature of 40 DEG C is 12.47 mm<2> / s (GB / T 265). Besides the excellent low temperature performance, the hydraulic oil composition has antioxidant and antirust functions and can used for various hydraulic equipments in severe cold regions, the hydraulic oil composition has the advantages of reasonable raw materials compatibility, simple preparation method and wide application scope.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a low-viscosity and low-freezing-point hydraulic oil composition, which is suitable for various hydraulic mechanical equipment in severe cold regions and airport grounds. Background technique [0002] At present, the hydraulic equipment working in the cold area of ​​our country can use L-HS hydraulic oil, but in some special environments or requirements, such as operating in the severe cold area and low temperature in winter in our country, especially the hydraulic equipment working in the field, such as electric Industrial systems, high-voltage switchgear located in the field, hydraulic systems of fire-fighting cranes operating in the field, and hydraulic equipment operating in severe cold areas require hydraulic oil to have a sufficiently small viscosity at -60°C to ensure the smooth start of the hydraulic pump. At the same time, it can maintain enough viscosity at high temperat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N40/08C10N30/02C10N30/12C10N30/10
Inventor 贾睿汤涛陈惠卿韦安柱李万英王向阳
Owner CHINA PETROLEUM & CHEM CORP
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