CN107142131B

CN107142131B - Lithium-based special base oil and preparation method thereof

Info

Publication number: CN107142131B
Application number: CN201710362452.8A
Authority: CN
Inventors: 周忠太; 张守鹏; 张丹; 宋丽华; 时红敏
Original assignee: Xinxiang Hengxing Technology Co Ltd
Current assignee: Xinxiang Hengxing Technology Co Ltd
Priority date: 2017-05-22
Filing date: 2017-05-22
Publication date: 2020-11-10
Anticipated expiration: 2037-05-22
Also published as: CN107142131A

Abstract

The invention provides a lithium-based special base oil which is prepared from the following raw materials in percentage by weight: alkane oil: 40% -50%, naphthenic oil: 30% -45% and aromatic oil: 25 to 15 percent. The lithium-based special base oil and the preparation method thereof provided by the invention can meet the requirement of improving the overall performance of the lithium-based lubricating grease.

Description

Lithium-based special base oil and preparation method thereof

Technical Field

The invention relates to lithium-based special base oil and a preparation method thereof.

Background

Currently, the yield of lithium grease is the largest among grease varieties, and accounts for more than 90% of the total yield of grease nationwide. Because of the moderate chemical nature of lithium metal, the overall performance of lithium soaps is greater than that of other metallic and non-metallic soaps. The lithium-based lubricating grease has good comprehensive performance and universal applicability, so the lithium-based lubricating grease is used in large quantities.

The lubricating grease mainly comprises three components: base oil, soap, additives. In the production of lithium-based greases, many lithium soaps and many additives have been invented to improve various properties of lithium-based greases. Very few studies have been made of the effect of base oils on lithium-based greases. At present, two main types of base oil are used for producing lithium-based lubricating grease, namely national standard mechanical oil and non-national standard pickling oil. The national standard oil is refined machine oil and is used for producing high-quality lubricating grease, and the pickling oil has complex components and is used for producing low-end lubricating grease. There are also uses of special base oils, such as low temperature oils, 150BS oils, etc., for producing greases of particular properties. In general, since it is considered that a good base oil produces a good grease and a poor base oil produces a general-quality grease, a single base oil is generally used. However, each oil has advantages and disadvantages, the viscosity of national standard machine oil is small, the soap content of the lubricating grease is high, and the cost is high. The acid wash oil has a high viscosity and a high thickening capacity, but has a low soap content and a low oxidation resistance and extreme pressure resistance. 150BS can improve the temperature resistance of the lubricating grease, but the water spray resistance is poor. Therefore, the use of a single base oil cannot satisfy the improvement of the overall performance of the lithium-based grease.

Disclosure of Invention

The invention aims to provide lithium-based special base oil and a preparation method thereof, which can meet the requirement of improving the overall performance of lithium-based lubricating grease.

In order to solve the technical problems, the lithium-based special base oil and the preparation method thereof provided by the invention are realized as follows:

the lithium-based special base oil is prepared from the following raw materials in parts by weight: 40% -50%, naphthenic oil: 30% -45% and aromatic oil: 25 to 15 percent.

Optionally, the alkane oil is white oil or BS oil.

Optionally, the naphthenic oil is refrigerator oil or transformer oil.

Optionally, the refrigerator oil is low-temperature oil.

Optionally, the low temperature oil has a viscosity of 100 degrees 9 centistokes.

Optionally, the aromatic oil is asphalt oil or extract oil.

The preparation method of the lithium-based special base oil comprises the steps of adding the alkane oil into a blending kettle, heating to 80 ℃, adding the naphthenic oil and the aromatic oil, uniformly stirring, and pumping into an oil tank.

The special base oil for the lithium-based lubricating grease prepared by the invention fully considers the interaction between the structure of the soap fiber of the lithium-based lubricating grease and the structure of the base oil. The structure of the lithium-based lubricating grease is very similar to that of sponge water absorption, the lithium soap is sponge, and the water is base oil; the fiber of the universal lithium soap is in a straight chain structure, the fiber of the composite lithium soap is in a net structure, the net structure is more stable than the straight chain structure, and the net structure has better fixing effect on base oil than the straight chain structure, so that the quality of the composite lithium grease is better than that of the universal lithium grease. The naphthenic hydrocarbon and the aromatic hydrocarbon are both in a ring structure, so that the gap between molecules is larger, and the paraffinic hydrocarbon is in a straight chain structure, so that paraffinic hydrocarbon oil molecules can be fused between the naphthenic hydrocarbon and aromatic hydrocarbon oil molecules, and the soap content of the base oil is increased, so that the oil consumption is greatly improved, the use of soap in the raw material of the lubricating grease is reduced, and the cost for producing the lubricating grease is reduced; moreover, naphthenic oil and aromatic oil have poor oxidation resistance and temperature resistance, so that alkane is required to be used for blending, and the oxidation resistance and the temperature resistance of the base oil are improved.

The invention blends three oils of alkane, cyclane and arene according to a certain proportion to obtain the special base oil for the lithium-based lubricating grease, and the base oil can optimize the quality and the cost of the lubricating grease.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example one

To produce 5 tons of base oil:

2250 kg of 150BS oil is added into a blending kettle, 1750 kg of low-temperature oil and 1000 kg of asphalt oil are added when the temperature is raised to 80 ℃ by stirring, and the mixture is uniformly stirred and pumped into an oil tank.

The method is used for producing No. 2 lithium-based lubricating grease with a dropping point of 280 ℃ per ton and a wide temperature range of 20 ℃ to 20 ℃, 800 kg of base oil is needed when No. 150 national standard oil is used, and 1 ton of No. 2 lubricating grease can be produced by 200 kg of soap; the lithium-based lubricating grease No. 2 with the dropping point of 280 ℃ per ton and the condensation point of-20 ℃ wide temperature is produced, the same is 200 kg of soap, the base oil blended by the embodiment is 1040 kg of the lubricating grease No. 2 with the concentration of 1240 kg, the yield is increased by 24%, and the production cost is lower than that of the international standard oil No. 150. And the No. 2 lithium-based lubricating grease with the dropping point of 280 ℃ and the condensation point of-20 ℃ wide temperature cannot be produced by using other base oil.

Example two

To produce 5 tons of base oil:

2250 kg of white oil is added into a blending kettle, 1500 kg of transformer oil and 1250 kg of extract oil are added when the temperature is raised to 80 ℃ by stirring, and the mixture is uniformly stirred and pumped into an oil tank.

The method is used for producing No. 2 lithium-based lubricating grease with a dropping point of 280 ℃ per ton and a wide temperature range of 20 ℃ to 20 ℃, 800 kg of base oil is needed when No. 150 national standard oil is used, and 1 ton of No. 2 lubricating grease can be produced by 200 kg of soap; the lithium-based lubricating grease No. 2 with the dropping point of 280 ℃ per ton and the wide temperature range of 20 ℃ below zero is produced, the same is 200 kg of soap, the base oil blended by the embodiment is 1000 kg of the lubricating grease No. 2 with the yield of 1200 kg, the yield is increased by 20%, and the production cost is lower than that of the international standard oil No. 150. And the No. 2 lithium-based lubricating grease with the dropping point of 280 ℃ and the condensation point of-20 ℃ wide temperature cannot be produced by using other base oil.

EXAMPLE III

To produce 5 tons of base oil:

adding 2500 kg of white oil into a blending kettle, stirring and heating to 80 ℃, adding 1500 kg of refrigerator oil and 1000 kg of asphalt oil, stirring uniformly, and pumping into an oil tank.

The method is used for producing No. 2 lithium-based lubricating grease with a dropping point of 280 ℃ per ton and a wide temperature range of 20 ℃ to 20 ℃, 800 kg of base oil is needed when No. 150 national standard oil is used, and 1 ton of No. 2 lubricating grease can be produced by 200 kg of soap; the lithium-based lubricating grease No. 2 with the dropping point of 280 ℃ per ton and the condensation point of-20 ℃ wide temperature is produced, the same is 200 kg of soap, the base oil blended by the embodiment is 1100 kg of the lubricating grease No. 2 with the concentration of 1300 kg, the yield is increased by 30%, and the production cost is lower than that of the international standard oil No. 150. And the No. 2 lithium-based lubricating grease with the dropping point of 280 ℃ and the condensation point of-20 ℃ wide temperature cannot be produced by using other base oil.

Example four

To produce 5 tons of base oil:

2000 kg of BS oil is added into a blending kettle, when the temperature is raised to 80 ℃ by stirring, 1850 kg of low-temperature oil and 1150 kg of extract oil are added, and the mixture is uniformly stirred and pumped into an oil tank.

The method is used for producing No. 2 lithium-based lubricating grease with a dropping point of 280 ℃ per ton and a wide temperature range of 20 ℃ to 20 ℃, 800 kg of base oil is needed when No. 150 national standard oil is used, and 1 ton of No. 2 lubricating grease can be produced by 200 kg of soap; the lithium-based lubricating grease No. 2 with the dropping point of 280 ℃ per ton and the condensation point of-20 ℃ wide temperature is produced, the same is 200 kg of soap, the base oil blended by the embodiment is 1050 kg of the No. 2 lubricating grease No. 1250 kg, the yield is 25 percent more, and the production cost is lower than that of the No. 150 international standard oil. And the No. 2 lithium-based lubricating grease with the dropping point of 280 ℃ and the condensation point of-20 ℃ wide temperature cannot be produced by using other base oil.

EXAMPLE five

To produce 5 tons of base oil:

2000 kg of BS oil is added into a blending kettle, when the temperature is raised to 80 ℃ by stirring, 2250 kg of transformer oil and 750 kg of asphalt oil are added, and the mixture is uniformly stirred and pumped into an oil tank.

The method is used for producing No. 2 lithium-based lubricating grease with a dropping point of 280 ℃ per ton and a wide temperature range of 20 ℃ to 20 ℃, 800 kg of base oil is needed when No. 150 national standard oil is used, and 1 ton of No. 2 lubricating grease can be produced by 200 kg of soap; the lithium-based lubricating grease No. 2 with the dropping point of 280 ℃ per ton and the condensation point of-20 ℃ wide temperature is produced, the same is 200 kg of soap, the base oil blended by the embodiment is 1060 kg of lubricating grease No. 2 producing 1260 kg, the yield is increased by 26%, and the production cost is lower than that of international standard oil No. 150. And the No. 2 lithium-based lubricating grease with the dropping point of 280 ℃ and the condensation point of-20 ℃ wide temperature cannot be produced by using other base oil.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The lithium-based special base oil is characterized by being prepared from the following raw materials in percentage by weight: alkane oil: 40% -50%, naphthenic oil: 30% -45% and aromatic oil: 25% -15%; the naphthenic oil is refrigerator oil or transformer oil, and the aromatic oil is asphalt oil or extract oil.

2. The lithium-based specialty base oil according to claim 1 wherein said alkane oil is white oil or BS oil.

3. The lithium-based specialty base oil according to claim 1 wherein said refrigerator oil is a low temperature oil.

4. The lithium-based specialty base oil according to claim 3, wherein said low temperature oil has a viscosity of 100 degrees 9 centistokes.

5. The method for preparing the lithium-based special base oil according to claim 1, wherein the method comprises the steps of adding the alkane oil into a blending kettle, heating to 80 ℃, adding the cycloalkane oil and the aromatic oil, uniformly stirring, and pumping into an oil tank.