CN1175621A

CN1175621A - Method for preparing superfine borate additive for lubricating oil

Info

Publication number: CN1175621A
Application number: CN 96109484
Authority: CN
Inventors: 徐滨士; 乔玉林; 刘维民; 马世宁; 薛群基
Original assignee: Lanzhou Institute of Chemical Physics LICP of CAS; Academy of Armored Forces Engineering of PLA
Current assignee: Lanzhou Institute of Chemical Physics LICP of CAS; Academy of Armored Forces Engineering of PLA
Priority date: 1996-08-29
Filing date: 1996-08-29
Publication date: 1998-03-11
Anticipated expiration: 2016-08-29
Also published as: CN1051107C

Abstract

A phase-transfer process for preparing ultrafine (less than 0.5 microns) borate additive of lubricant includes addition of disperser, promoter and diluent, ultrasonic emulsifying and dispersing, reaction in neutral micro emulsion and vacuum dewatering. If it is added to lubricant, the lubricant features higher antiwear and bearing power and improved thermal oxidation stability and anticorrosion and antirust nature.

Description

The preparation method of superfine borate additive for lubricating oil

The present invention relates to one and gone on foot the method that phase transition prepares the superfine borate additive.More particularly, the present invention relates to disperse, in neutral microemulsion, reacted, prepared the method for superfine borate additive through ultrasonic emulsification.

As everyone knows, the quality of lubricant is decision machinery equipment serviceability and one of important factor that prolongs its work-ing life, and lubricating oil additive is the marrow of various quality lubricants, can give the property that lubricant itself does not possess.Inorganic borate not only can improve the extreme-pressure anti-wear antifriction performance of lubricant as lubricating oil additive, but also can improve the antioxidant property of lubricant, antiseptic and rustproof performance, and nonpoisonous and tasteless, help environment protection.According to United States Patent (USP) (USP) 3997452 reported method, the borate additive of preparation, its storage stability is poor, and preparation technology is comparatively complicated, the production cost height, thereby limited the widespread use of such additive.

The object of the present invention is to provide a kind of novelty, a simple step phase transition prepares the method for superfine borate additive.By adding an amount of dispersion agent, promotor, thinner, disperse through ultrasonic emulsification, boric acid and sodium hydroxide or potassium hydroxide are reacted, decompression dehydration at a lower temperature, the superfine borate additive of preparation lubricity excellence in neutral microemulsion.

The present invention includes with the ultrasonic dispersing emulsified boric acid sodium hydroxide or potassium hydroxide are reacted in neutral microemulsion, and the composition of dispersion agent and promotor.

Wherein said base oil comprises neutral paraffinic based oil;

Wherein said dispersion agent comprises one or more of alkaline sulfonate, alkylsalicylate, alkyl phenate, single, double succimide;

Wherein said thinner comprises toluene, dimethylbenzene, aromatics organic solvent or petroleum naphtha;

Wherein said promotor comprises one or more mixture of water, methyl alcohol, ethanol, propyl alcohol, butanols, amylalcohol, hexanol, octanol.

The present invention specifically realizes by following measure

(40 ℃ of viscosity are 28.8-35.2mm with the refining base oil of mesodialyte cerul ²/ s) 10-40 part (wt), the dispersant of thinner 20-100 part (wt) and 4-15 part (wt) under agitation is heated to 70-80 ℃, adds the boric acid of 0.2-1.2 mole, boronation 0.5-2.0 hour, makes reaction mixture A; Promotor is added among the mixture A, disperseed 0.5-1.0 hour through ultrasonic emulsification, add the potassium hydroxide or the sodium hydroxide solution of 0.1-1.0 mole then, under 90-100 ℃, reaction is 1-3 hour in neutral microemulsion, makes reaction mixture B; At 3-20Kpa, 105-140 ℃ of following decompression dehydration obtains brown product after the cooling with reaction mixture B.This product boron content is 3.0-8.0%, and particle is less than 0.5 micron.

The weight percentage of superfine borate additive in oil product of the present invention's preparation is between 3-10%, and content is preferably in 4-6%, and can obtain good extreme-pressure anti-wear antifriction quality, antiseptic and rustproof performance and antioxidant property this moment.

Superfine borate additive by method for preparing, (vertical omnipotent friction and wear tester, Jinan experimental machine factory) is 1500r/min at rotating speed through four ball experimental machine, and loading is 392N, time is 30min, has investigated the antiwear and friction reduction property and the supporting capacity of this additive under the room temperature.Test used steel ball and be the secondary standard steel ball that Lanzhou Berings Factory produces (the GCr15 bearing steel, HRC59-61).Its experiment the results are shown in table 1.By shown in the table 1, the borate additive of this method preparation has fabulous antiwear and antifriction and supporting capacity.Table 2 has been listed its antiseptic and rustproof performance, as can be seen from Table 2.It has good antiseptic and rustproof performance.This additive also has good anti-oxidative stability and advantage such as free from environmental pollution.

The friction and wear behavior of table 1 superfine borate additive

Content (wt%)	Wear scar diameter (mm)	Frictional coefficient	Last non seizure load (N)
Content (wt%)	Wear scar diameter (mm)	Frictional coefficient	Last non seizure load (N)	????0	????0.91	????0.108	????441
????5	????0.45	????0.072	????735	????0	????0.91	????0.108	????441
????5	????0.45	????0.072	????735	????10	????0.41	????0.068	????882

(notes): base oil is the antiseptic and rustproof performance of ISO VG 68 table 2 superfine borate additives

Base oil	The copper corruption	Corrosion
Base oil	The copper corruption	Corrosion	ISO?VG350	??1b	Rustless
ISO?VG650	??1b	Rustless	ISO?VG350	??1b	Rustless
ISO?VG650	??1b	Rustless	Whiteruss	??1a	Rustless

Annotate: the copper strip test condition is 100 ℃, and 3 hours, corrosion test was an artificial seawater.

In order to understand the present invention better, it is described especially exemplified by an example:

20 parts of (wt) ISO VG 68 are made with extra care base oils and 40 parts of (wt) dimethylbenzene and 12 parts of (wt) succinic diamides be mixed and heated to 80 ℃, the boric acid that adds 0.6 mole, stir 30min, add the butanols of 30 parts (wt) again, ultrasonic emulsification disperses 30min, make neutral microemulsion, the sodium hydroxide solution that adds 0.4 mole makes it 92 ℃ of reactions 3 hours, at 5.33Kpa, 115 ℃ of following decompression dehydrations and remove thinner obtain a brown product.This product boron-containing quantity is 6.3%, and particle is less than 0.5 micron.

Claims

1 one kinds of methods that prepare superfine borate additive for lubricating oil, it is characterized in that: boric acid is scattered in the mixture of base oil, dispersion agent, thinner and promotor through ultrasonic emulsification, make it in neutral microemulsion, to react with sodium hydroxide or potassium hydroxide, make brown borate additive through decompression dehydration, its particle is less than 0.5 micron.

2 a kind of methods that prepare superfine borate additive for lubricating oil according to claim 1, one or more the mixture that consists of alkaline sulfonate, alkylsalicylate, alkyl phenate, single, double succimide of dispersion agent.

3 a kind of methods that prepare superfine borate additive for lubricating oil according to claim 1, promotor comprise one or more mixture of water, methyl alcohol, ethanol, propyl alcohol, butanols, amylalcohol, hexanol, octanol.

4 a kind of methods that prepare superfine borate additive for lubricating oil according to claim 1, underpressure distillation are at 3-20Kpa, dewater under 105-140 ℃ and remove thinner.