Demulsifier composition and lubricating oil

Abstract

The invention relates to a demulsifier composition and lubricating oil. The demulsifier composition comprises a tritolyl phosphate demulsifier and a polyether demulsifier, wherein the mass ratio of the tritolyl phosphate demulsifier and the polyether demulsifier is 4:1-6. The demulsifier composition is used in worm and gear oil, and has better water separation effect when compared with single use of one demulsifier type.

Description

technical field

[0001] The invention relates to a demulsifier composition for lubricating oil and its application. Background technique

[0002] Demulsifiers used in lubricating oils are often also called demulsifiers. There are many reasons for poor water separation or emulsification of lubricating oil. One is the high viscosity of lubricating oil; the other is that various additives are added to industrial lubricating oil, most of which are surfactants with emulsifying function; Compounds that deteriorate the demulsibility of the oil. Deepening the refining depth of the base oil and selecting the appropriate additives are a problem that should be considered first, but adding a demulsifier is the main way to improve the demulsibility of the lubricating oil.

[0003] After adding the demulsifier, the demulsifier is adsorbed on the oil / water interface film, which can change the oil / water interfacial tension, eliminate the obstacle of the mutual combination of the dispersed...

Examples

example 1

[0024] Mix tricresyl phosphate type demulsifier and polyether type demulsifier 1 according to the mass ratio of 80:20, and stir them evenly by mechanical or manual at 20°C-50°C to prepare demulsifier composition 1, wherein The main component of the tricresyl phosphate demulsifier is tricresyl phosphate (DM45), and the main component of the polyether demulsifier is a block polymer of polyethylene oxide and polypropylene oxide (PE6100). The obtained demulsifier composition 1 was added to the worm gear lubricating oil according to the amount of 0.05%, and the anti-emulsification performance of the oil product of the lubricating oil was measured. The emulsion and the worm gear lubricating oil added with polyether demulsifier were tested, and the test results are shown in Table 2.

[0025] Table 2 Anti-emulsification performance of worm gear lubricating oil

[0026]

[0027] As can be seen from Table 2, no demulsifier is added to the worm gear lubricating oil, tricresyl phospha...

example 2

[0029] Mix tricresyl phosphate type demulsifier and polyether type demulsifier 2 according to the ratio of 50:50, and stir them evenly by mechanical or manual at the temperature of 20°C-50°C to prepare demulsifier composition 2, in which tricresyl phosphate The main component of the cresyl ester demulsifier is tricresyl phosphate (DM45), and the main component of the polyether demulsifier is the block polymer of polyethylene oxide and polypropylene oxide (LZ5957). The obtained demulsifier composition 2 was added to the worm gear lubricating oil according to the amount of 0.02%, and the anti-emulsification performance of the oil product of the lubricating oil was measured. The emulsion and the worm gear lubricating oil added with polyether demulsifier were tested, and the test results are shown in Table 3.

[0030] Table 3. Anti-emulsification performance of worm gear lubricating oil

[0031]

[0032]

[0033] It can be seen from Table 3 that in the worm gear lubricating...

example 3

[0035] Mix the tricresyl phosphate demulsifier and the polyether demulsifier 3 in a ratio of 60:40, and stir them uniformly by mechanical or manual at a temperature of 20°C-50°C to form a demulsifier composition 3, in which tricresyl phosphate The main component of the cresyl ester demulsifier is tricresyl phosphate (DM45), and the main component of the polyether demulsifier 3 is a block polymer of polyethylene oxide and polypropylene oxide (DL32). The obtained demulsifier composition 3 was added to the worm gear lubricating oil according to the amount of 0.05%, and the anti-emulsification performance of the oil product of the lubricating oil was measured. The emulsion and the worm gear lubricating oil added with polyether demulsifier were tested, and the test results are shown in Table 4.

[0036] Table 4. Anti-emulsification properties of worm gear lubricants

[0037]

[0038] It can be seen from Table 4 that in the worm gear lubricating oil without adding demulsifier, a...

technical field

[0001] The invention relates to a demulsifier composition for lubricating oil and its application. Background technique

[0002] Demulsifiers used in lubricating oils are often also called demulsifiers. There are many reasons for poor water separation or emulsification of lubricating oil. One is the high viscosity of lubricating oil; the other is that various additives are added to industrial lubricating oil, most of which are surfactants with emulsifying function; Compounds that deteriorate the demulsibility of the oil. Deepening the refining depth of the base oil and selecting the appropriate additives are a problem that should be considered first, but adding a demulsifier is the main way to improve the demulsibility of the lubricating oil.

[0003] After adding the demulsifier, the demulsifier is adsorbed on the oil / water interface film, which can change the oil / water interfacial tension, eliminate the obstacle of the mutual combination of the dispersed...

Examples

example 1

[0024] Mix tricresyl phosphate type demulsifier and polyether type demulsifier 1 according to the mass ratio of 80:20, and stir them evenly by mechanical or manual at 20°C-50°C to prepare demulsifier composition 1, wherein The main component of the tricresyl phosphate demulsifier is tricresyl phosphate (DM45), and the main component of the polyether demulsifier is a block polymer of polyethylene oxide and polypropylene oxide (PE6100). The obtained demulsifier composition 1 was added to the worm gear lubricating oil according to the amount of 0.05%, and the anti-emulsification performance of the oil product of the lubricating oil was measured. The emulsion and the worm gear lubricating oil added with polyether demulsifier were tested, and the test results are shown in Table 2.

[0025] Table 2 Anti-emulsification performance of worm gear lubricating oil

[0026]

[0027] As can be seen from Table 2, no demulsifier is added to the worm gear lubricating oil, tricresyl phospha...

example 2

[0029] Mix tricresyl phosphate type demulsifier and polyether type demulsifier 2 according to the ratio of 50:50, and stir them evenly by mechanical or manual at the temperature of 20°C-50°C to prepare demulsifier composition 2, in which tricresyl phosphate The main component of the cresyl ester demulsifier is tricresyl phosphate (DM45), and the main component of the polyether demulsifier is the block polymer of polyethylene oxide and polypropylene oxide (LZ5957). The obtained demulsifier composition 2 was added to the worm gear lubricating oil according to the amount of 0.02%, and the anti-emulsification performance of the oil product of the lubricating oil was measured. The emulsion and the worm gear lubricating oil added with polyether demulsifier were tested, and the test results are shown in Table 3.

[0030] Table 3. Anti-emulsification performance of worm gear lubricating oil

[0031]

[0032]

[0033] It can be seen from Table 3 that in the worm gear lubricating...

example 3

[0035] Mix the tricresyl phosphate demulsifier and the polyether demulsifier 3 in a ratio of 60:40, and stir them uniformly by mechanical or manual at a temperature of 20°C-50°C to form a demulsifier composition 3, in which tricresyl phosphate The main component of the cresyl ester demulsifier is tricresyl phosphate (DM45), and the main component of the polyether demulsifier 3 is a block polymer of polyethylene oxide and polypropylene oxide (DL32). The obtained demulsifier composition 3 was added to the worm gear lubricating oil according to the amount of 0.05%, and the anti-emulsification performance of the oil product of the lubricating oil was measured. The emulsion and the worm gear lubricating oil added with polyether demulsifier were tested, and the test results are shown in Table 4.

[0036] Table 4. Anti-emulsification properties of worm gear lubricants

[0037]

[0038] It can be seen from Table 4 that in the worm gear lubricating oil without adding demulsifier, a...

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