CN115820326A - Method for preparing open gear lubricant by using waste molybdenum disulfide lithium-based lubricating grease - Google Patents
Method for preparing open gear lubricant by using waste molybdenum disulfide lithium-based lubricating grease Download PDFInfo
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- 239000004519 grease Substances 0.000 title claims abstract description 60
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 54
- QWVMUSBBWGTKML-UHFFFAOYSA-N [Li].[Mo](=S)=S Chemical compound [Li].[Mo](=S)=S QWVMUSBBWGTKML-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000002699 waste material Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000314 lubricant Substances 0.000 title claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 83
- 239000000203 mixture Substances 0.000 claims abstract description 70
- 239000002199 base oil Substances 0.000 claims abstract description 36
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 21
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- 229910052791 calcium Inorganic materials 0.000 claims abstract description 16
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- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 claims description 20
- 239000012964 benzotriazole Substances 0.000 claims description 20
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- 238000010438 heat treatment Methods 0.000 claims description 14
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- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 4
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- 238000011084 recovery Methods 0.000 description 4
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- 239000003963 antioxidant agent Substances 0.000 description 3
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- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000012208 gear oil Substances 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LOUPRKONTZGTKE-WZBLMQSHSA-N Quinine Chemical compound C([C@H]([C@H](C1)C=C)C2)C[N@@]1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OC)C=C21 LOUPRKONTZGTKE-WZBLMQSHSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
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- 150000004867 thiadiazoles Chemical class 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 235000001258 Cinchona calisaya Nutrition 0.000 description 1
- 235000003901 Crambe Nutrition 0.000 description 1
- 241000220246 Crambe <angiosperm> Species 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 description 1
- 229920001091 Poly(octyl cyanoacrylate) Polymers 0.000 description 1
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- 125000004432 carbon atom Chemical group C* 0.000 description 1
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- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- LOUPRKONTZGTKE-UHFFFAOYSA-N cinchonine Natural products C1C(C(C2)C=C)CCN2C1C(O)C1=CC=NC2=CC=C(OC)C=C21 LOUPRKONTZGTKE-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- IOJUPLGTWVMSFF-UHFFFAOYSA-N cyclobenzothiazole Natural products C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 description 1
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- 235000014113 dietary fatty acids Nutrition 0.000 description 1
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- 150000002148 esters Chemical class 0.000 description 1
- DNORZUSMZSZZKU-UHFFFAOYSA-N ethyl 2-[5-(4-chlorophenyl)pentyl]oxirane-2-carboxylate Chemical compound C=1C=C(Cl)C=CC=1CCCCCC1(C(=O)OCC)CO1 DNORZUSMZSZZKU-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- 239000010439 graphite Substances 0.000 description 1
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- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
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- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
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- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
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- 229960000948 quinine Drugs 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- 239000002904 solvent Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Abstract
The invention provides a method for preparing an open gear lubricant by using waste molybdenum disulfide lithium-based lubricating grease, which is characterized by comprising the following steps of: stirring and diluting the recovered waste molybdenum disulfide lithium-based lubricating grease with base oil, and removing solid impurities through centrifugal filtration to obtain a mixture; adding calcium petroleum sulfonate and polyisobutylene base oil into the mixture, and uniformly stirring; adding functional additive, and stirring. The method has important significance for recycling resources and reducing environmental pollution, and the lubricant prepared by the method has the advantages of good adhesion, good shear stability, high extreme pressure resistance and the like, and can be used as an open gear lubricant.
Description
Technical Field
The invention belongs to the field of processing of lubricating materials, and particularly relates to a method for preparing an open gear lubricant by using waste lithium molybdenum disulfide-based lubricating grease.
Background
Lubricating oils and greases are the two most common lubricants. The lubricating oil is an oily lubricating agent consisting of base oil and additives, and is suitable for lubrication requiring higher fluidity; the grease is added with a thickening agent to form paste, and the components of the grease are base oil, the thickening agent and an additive, so that the grease is suitable for lubricating heavy-load equipment and the like.
The industrial development can not be realized, and the lubricating grease has the characteristics of good adhesion and difficult loss, can solve the problem which can not be solved by the lubricating oil, and therefore occupies an important share in the lubricating field. The molybdenum disulfide lithium-based lubricating grease is refined from molybdenum disulfide refined substances and various additives such as oxidation resistance, rust prevention and the like, and has good waterproof performance and rust prevention performance. The extreme pressure antiwear agent has the greatest advantage of outstanding extreme pressure antiwear performance, is mainly used for heavy-load parts with impact load, and can effectively prevent mechanical parts from being seized and sintered.
After mechanical equipment is used for a period of time, the lubricating grease is gradually degraded and loses efficacy under the shearing action and self reasons to become waste lubricating grease, the waste lubricating grease has poor biodegradability, if the waste lubricating grease is discarded randomly, the environment is greatly damaged, and unlike the waste lubricating grease recovery treatment, at present, no mature recovery treatment method aiming at the waste lubricating grease, particularly the waste molybdenum disulfide lithium-based lubricating grease is adopted at home, and the incineration treatment is generally adopted.
The open gear has the characteristics of low rotating speed, large tooth surface meshing pressure, easy falling of external media such as dust, scraps and the like in transmission to cause lubricating oil pollution, easy generation of abrasive wear of the gear and the like, so that the open gear transmission usually uses high-viscosity oil, asphaltene lubricant or lubricating grease and can effectively work at a lower speed, and the extreme pressure resistance of the open gear lubricant is particularly important.
Chinese patent application CN103045334A discloses an open gear grease, which comprises the following components: 50-90 parts of base oil and 4-10 parts of thickening agent; 1-3 parts of antioxidant; 1-5 parts of extreme pressure antiwear agent; 1-5 parts of a solid antiwear agent; 10-20 parts of adhesive (preferably asphalt). The open gear lubricating grease disclosed by the document has the advantages of simple components and low cost, and also has the advantages of strong adhesion capability, excellent lubricating property, good oil saving property and strong extreme pressure abrasion resistance. Moreover, the grease-like consistency can be maintained in a larger temperature range, thereby being convenient for operators to use.
The patent technology is actually typical asphalt lubricating grease in the industry at present, other components are conventional components of the lubricating grease, although the adhesiveness of the lubricating grease added with asphalt can be improved, the lubricating performance of the asphalt is poor, the low-temperature starting performance is difficult, the anti-pollution capacity is poor, dirt is easy to absorb and retain, the abrasive wear of gears is caused, and the thrown-out lubricating agent contains asphalt and is difficult to clean and has other environmental protection problems. The industry has gradually abandoned asphaltene greases.
Chinese patent application CN101235338A discloses an open gear grease composition, which comprises the following components and weight percentages: 2-6% of thickening agent, 20-60% of mineral oil, 20-60% of synthetic oil, 0.3-1% of antioxidant, 1-15% of oil-soluble antiwear extreme pressure agent, 3-20% of solid additive and 1-3% of antirust agent. The document states that the open gear grease composition is free of solvents and asphalt, and is environmentally friendly; the problems of pollution, poor low-temperature performance and poor fluidity of the open gear lubricating grease of the asphalt type open gear oil are solved; has outstanding water resistance, adhesion and extreme pressure resistance to abrasion.
The patented technology is actually a typical non-asphaltic lubricating grease in the industry at present, other components are conventional components of the lubricating grease, the lubricating grease without asphalt is more favorable in environmental protection, but the adhesiveness and the fluidity are poorer than those of asphaltic lubricating grease, and the functions of the lubricating performance, the extreme pressure resistance and the like are not as good as those of asphaltic lubricating grease.
Chinese patent application CN102433195A discloses a composition for open gear grease, comprising the following components in weight percent: metal soap grease: 15-25%, vegetable oil: 40-50%, ester oil: 15-25%, polyisobutylene: 10-20%: the following additives are added, calculated by taking the total amount of the base oil and the thickening agent as 100 percent: dialkyl dithiocarbamates: 2-5%, borate ester: 0-4%, borate: 3-8%, dialkyl dithiophosphate ester: 1-3%, sulfurized fat: 3-10%, graphite: 3-10%, molybdenum disulfide: 2-8%, antioxidant: 0.5-1%, preservative: 0 to 2 percent. The document states that the grease has the following advantages: the lubricating grease has excellent extreme pressure wear resistance, protective performance and adhesion performance due to the selection of a proper raw material proportion, and has excellent environment friendliness due to the selection of a biodegradable raw material.
The patent technology provides biodegradability of lubricating grease by replacing mineral oil with biodegradable vegetable oil and ester oil so as to avoid pollution to the environment, but the replacement inevitably brings great increase in cost, the working environment of the open gear oil is severe, the working environment is open, unmodified vegetable oil is used as base oil, although the biodegradability can be improved, the vegetable oil is easy to oxidize and deteriorate in the using process, so that the service life of the open gear oil can be greatly shortened, and the problem of abandonment and recovery of the existing predominantly mineral oil lubricating grease is not benefited.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method for preparing an open gear lubricant by using waste lithium molybdenum disulfide-based lubricating grease as a raw material, which has important significance for recycling resources and reducing environmental pollution, and the lubricant prepared by the method has the advantages of good adhesion, good shear stability, high extreme pressure resistance and the like, and can be used as the open gear lubricant.
In order to achieve the purpose, the invention provides the following specific technical scheme:
the invention provides a method for preparing an open gear lubricant by using waste molybdenum disulfide lithium-based lubricating grease, which is characterized by comprising the following steps of:
a, stirring and diluting the recovered waste molybdenum disulfide lithium-based lubricating grease with base oil, and removing solid impurities through centrifugal filtration to obtain a mixture;
b, adding calcium petroleum sulfonate and polyisobutene base oil into the mixture obtained in the step A, and uniformly stirring;
and C, adding the functional additive and uniformly stirring.
Preferably, the base oil in the step A is 26# industrial white oil, and the dosage of the base oil is 2-4 times of the mass of the waste molybdenum disulfide lithium-based lubricating grease.
Preferably, the stirring in step A is at 80-100 ℃ for 3-5h.
Further preferably, the polyisobutylene base oil in step B is a combination of polyisobutylene PIB1300 base oil and 150BS base oil in amounts of 15% to 50% and 30% to 60% of the mass of the mixture in step a, respectively.
Preferably, the calcium petroleum sulfonate in the step B is calcium petroleum sulfonate T106, and the dosage of the calcium petroleum sulfonate is 4-6% of the mass of the mixture in the step A.
Preferably, the stirring in step B is performed at 100-110 ℃ for 3-5h.
Further preferably, the functional additive in the step C comprises benzotriazole, and the adding amount of the benzotriazole is 0.03-0.6% of the mass of the mixture in the step A.
Preferably, the functional additive in step C comprises a metal deactivator, and the addition amount of the metal deactivator is 0.05-0.5% of the mass amount of the mixture in step A.
Preferably, the functional additive in the step C comprises graphite powder, and the adding amount of the graphite powder is 0.05-0.5% of the mass of the mixture in the step A.
Most effectively, the method of the invention comprises the following specific steps:
a, stirring and diluting the recovered waste molybdenum disulfide lithium-based lubricating grease for 4 hours at 80-100 ℃ by using No. 26 industrial white oil with the mass ratio of 3 times, removing solid impurities through centrifugal filtration to obtain a mixture, and placing the mixture in a stirring kettle for later use;
b, adding 5 percent by mass of calcium petroleum sulfonate T106 and 0.5 percent by mass of water into a stirring kettle, stirring and heating the mixture in the step A under the open air, stirring the mixture for 2 hours at 105 ℃, adding 15 to 50 percent by mass of polyisobutylene PIB1300 base oil into the reaction kettle, adding 30 to 60 percent by mass of 150BS base oil into the mixture in the step A, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding benzotriazole, a metal deactivator T551 and graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal deactivator.
The invention has the beneficial effects that:
firstly, the waste molybdenum disulfide lithium-based lubricating grease is used for preparing the lubricant for the open gear, so that the problem of environmental pollution caused by difficult recovery and treatment of the waste molybdenum disulfide lithium-based lubricating grease is solved, waste can be turned into wealth, the added value of the product is increased, the utilization rate of the product is improved, and the method has important significance for recycling waste and improving the added value of the product.
And secondly, the open gear lubricant prepared by using the waste molybdenum disulfide lithium-based lubricating grease has the advantages of good adhesion, good shear stability, high extreme pressure resistance and the like, and can be used as an open gear lubricant.
Thirdly, after the recycled waste molybdenum disulfide lithium-based lubricating grease is used, the open gear lubricant is prepared without adding thickening agents, molybdenum disulfide and other additives, so that the production cost can be greatly saved.
Detailed Description
The following examples are provided to better illustrate the present invention, but do not represent the present invention. Therefore, those skilled in the art can make insubstantial modifications and adaptations to the embodiments of the present invention based on the above disclosure, and shall fall within the scope of the invention as defined by the appended claims.
Maximum no-seizing load P B The values were measured according to GB/T3142 determination of lubricant carrying capacity (four-ball method);
the following kinematic viscosity is detected according to GB/T265 Petroleum products kinematic viscosity determination method and kinetic viscosity calculation method;
the following steel sheet corrosion test was conducted according to SH/T0195 lubricating oil corrosion test method;
the following liquid-phase rust test (distilled water) was carried out according to GB/T11143 test method for testing the rust-proofing performance of mineral oil as an inhibitor in the presence of water.
The lithium molybdenum disulfide grease is grease prepared by thickening mineral oil with lithium hydroxy fatty acid soap and adding molybdenum disulfide additive with good anti-wear and extreme pressure resistance, and the types of the lithium molybdenum disulfide grease are classified into 1, 2, 3# and the like according to NLGI consistency grades. The invention in the following examples recycled # 2 and/or # 3 lithium molybdenum disulfide based greases were used, but the invention is not limited to these recycled lithium molybdenum disulfide based greases.
The Polyisobutylene (PIB) of the present invention is a polymer prepared by polymerizing isobutylene, and the molecular weight of the polymer can be hundreds to millions. The polyisobutylene products of all models are commercial products. The polyisobutylene PIB1300 provided by da lin ltd, korea was used in the following examples of the present invention, but the present invention is not limited to these polyisobutylenes and combinations thereof.
The base oil of the present invention is generally referred to as mineral lubricating base oil, which is also called neutral oil. Neutral oil viscosity grades are expressed as Saybolt viscosity (seconds) at 37.8 deg.C (100F.), and are labeled 100N, 150N, 500N, etc., respectively. In the 70's of our country, three neutral oil standards, namely three main standards of paraffin-based neutral oil, intermediate-based neutral oil and naphthenic-based neutral oil, are made, and marked by SN, ZN and DN respectively. For example: 75SN, 100SN, 150SN, 200SN, 350SN, 500SN, 650SN, and 150BS. The products of various types are all commercial products. The 150BS base oil produced by the university of quinine limited was used in the following examples of the present invention, but the present invention is not limited to these base oils.
The base oil of the present invention also includes industrial white oil. The white oil is a mixture of liquid hydrocarbons, mainly composed of n-isoparaffin of 16 to 31 carbon atoms, and is obtained from high boiling fraction (i.e. lubricating oil fraction) of petroleum fraction by dewaxing, carbonization, neutralization, and activated clay refining. The grade of white oil is generally divided by the kinematic viscosity at 40 ℃, and can be divided into 7#, 11#, 15#, 18#, 24#, 48#, 64#, 100# and other types. The products of various types are all commercial products. The following examples of the present invention use 26# technical white oil manufactured by crambe petrochemical company, petroleum, china, but the present invention is not limited to this technical white oil.
The metal deactivator of the present invention is also called metal deactivator, and is additive for preventing metal from promoting the automatic oxidation of fuel oil, lubricating oil and other oil products, and has benzotriazole derivative, thiadiazole derivative, etc. commonly used. For example, T551 is a benzotriazole derivative type metal deactivator, T561 is a thiadiazole derivative type metal deactivator, T581 is a novel multifunctional benzotriazole derivative type metal deactivator, and all types of products are commercially available products. The present invention in the following examples, T551 metal deactivators supplied by Miran chemical Co., ltd, nanjing, were used, but the present invention is not limited to these metal deactivators and their combinations.
The corrosion inhibitor of the invention refers to chemical substances or compounds capable of preventing or retarding the corrosion of metal materials, and can be divided into inorganic corrosion inhibitors, organic corrosion inhibitors and polymer corrosion inhibitors. The inorganic corrosion inhibitor mainly comprises chromate, nitrite, silicate, molybdate, tungstate, polyphosphate, zinc salt and the like; the organic corrosion inhibitor mainly comprises heterocyclic compounds containing nitrogen-oxygen compounds such as phosphonic acid (salt), phosphonic carboxylic acid, sulfenyl benzothiazole, benzotriazole, sulfonated lignin and the like; the polymer corrosion inhibitor mainly comprises macromolecular chemicals of oligomers such as polyethylene, POCA, polyaspartic acid and the like. These corrosion inhibitor products are all commercially available products. Benzotriazole, manufactured by Nantong billows chemical Co., ltd, was used in the following examples of the present invention, but the present invention is not limited to these corrosion inhibitors or combinations thereof.
Other reagents and devices/equipment used in the invention are common chemical reaction reagents and devices/equipment, and a person skilled in the art can operate according to the use instructions of the product according to the needs.
Example 1
A, putting 50g of recovered 3# molybdenum disulfide lithium-based lubricating grease into a 500mL stirring kettle, adding 150g of 26# industrial white oil, heating to 80 ℃, stirring and diluting for 4 hours, centrifuging and filtering to remove solid impurities to obtain 196g of a mixture, and placing the mixture into the stirring kettle for later use;
b, adding 9.7g of calcium petroleum sulfonate T106 and 0.97g of water into a stirring kettle, stirring and heating the mixture under open air, stirring the mixture for 2 hours at 105 ℃, adding 29.4g of polyisobutylene PIB1300 and 117.6g of 150BS base oil into the reaction kettle, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding 0.06g of metal corrosion inhibitor and antirust benzotriazole, 0.551 of metal deactivator T551 and 0.1g of graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal corrosion inhibitor and antirust benzotriazole.
Example 2
A, putting 50g of recovered 3# molybdenum disulfide lithium-based lubricating grease into a 500mL stirring kettle, adding 150g of 26# industrial white oil, heating to 80 ℃, stirring and diluting for 4 hours, centrifuging and filtering to remove solid impurities to obtain 196g of a mixture, and placing the mixture into the stirring kettle for later use;
b, adding 9.7g of calcium petroleum sulfonate T106 and 0.97g of water into a stirring kettle, stirring and heating the mixture under the open air, stirring the mixture for 2 hours at 105 ℃, adding 117.6g of polyisobutylene PIB1300 and 58.8g of 150BS base oil into the reaction kettle, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding 1.176g of metal corrosion inhibitor and antirust benzotriazole, 0.098g of metal deactivator T551 and 0.5g of graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal corrosion inhibitor and antirust benzotriazole.
Example 3
A, putting 50g of recovered 3# molybdenum disulfide lithium-based lubricating grease into a 500mL stirring kettle, adding 150g of 26# industrial white oil, heating to 80 ℃, stirring and diluting for 4 hours, centrifuging and filtering to remove solid impurities to obtain 196g of a mixture, and placing the mixture into the stirring kettle for later use;
b, adding 9.7g of calcium petroleum sulfonate T106 and 0.97g of water into a stirring kettle, stirring and heating the mixture under open air, stirring the mixture for 2 hours at 105 ℃, adding 78.4g of polyisobutylene PIB1300 and 78.4g of 150BS base oil into the reaction kettle, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding 0.58g of metal corrosion inhibitor and antirust benzotriazole, 0.49g of metal deactivator T551 and 0.98g of graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal corrosion inhibitor and antirust benzotriazole.
Example 4
A, putting 50g of recovered 2# molybdenum disulfide lithium-based lubricating grease into a 500mL stirring kettle, adding 150g of 26# industrial white oil, heating to 80 ℃, stirring and diluting for 4 hours, centrifuging and filtering to remove solid impurities to obtain 196g of a mixture, and placing the mixture into the stirring kettle for later use;
b, adding 9.7g of calcium petroleum sulfonate T106 and 0.97g of water into a stirring kettle, stirring and heating the mixture under open air, stirring the mixture for 2 hours at 105 ℃, adding 54g of polyisobutylene PIB1300 and 80g of 150BS base oil into the reaction kettle, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding 0.8g of metal corrosion inhibitor and antirust benzotriazole, 0.6g of metal deactivator T551 and 0.6g of graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal corrosion inhibitor and antirust benzotriazole.
Example 5
A, putting 50g of recovered 2# molybdenum disulfide lithium-based lubricating grease into a 500mL stirring kettle, adding 150g of 26# industrial white oil, heating to 80 ℃, stirring and diluting for 4 hours, centrifuging and filtering to remove solid impurities to obtain 196g of a mixture, and placing the mixture into the stirring kettle for later use;
b, adding 9.7g of calcium petroleum sulfonate T106 and 0.97g of water into a stirring kettle, stirring and heating the mixture under the open air, stirring the mixture for 2 hours at 105 ℃, adding 100g of polyisobutylene PIB1300 and 80g of 150BS base oil into the reaction kettle, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding 0.6g of metal corrosion inhibitor and antirust benzotriazole, 0.8g of metal deactivator T551 and 0.9g of graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal corrosion inhibitor and antirust benzotriazole.
Example 6
A, putting 50g of recovered 2# molybdenum disulfide lithium-based lubricating grease into a 500mL stirring kettle, adding 150g of 26# industrial white oil, heating to 80 ℃, stirring and diluting for 4 hours, centrifuging and filtering to remove solid impurities to obtain 196g of a mixture, and placing the mixture into the stirring kettle for later use;
b, adding 9.7g of calcium petroleum sulfonate T106 and 0.97g of water into a stirring kettle, stirring and heating the mixture under open air, stirring the mixture for 2 hours at 105 ℃, adding 60g of polyisobutylene PIB1300 and 75g of 150BS base oil into the reaction kettle, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding 1.0g of metal corrosion inhibitor and antirust benzotriazole, 0.5g of metal deactivator T551 and 0.7g of graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal corrosion inhibitor and antirust benzotriazole.
Performance detection
Index tests were performed on the open gear lubricants prepared in examples 1-6, and the results are shown in table 1:
TABLE 1 Main indices of the inventive open gear lubricants
The detection results in table 1 show that the kinematic viscosity, the maximum seizure-free load, the steel sheet corrosion test and the liquid phase corrosion result of the open gear lubricant prepared by the recycled lithium molybdenum disulfide-based lubricating grease meet the requirements of open gear lubrication, and the waste is changed into valuable.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The method for preparing the open gear lubricant by using the waste lithium molybdenum disulfide-based lubricating grease is characterized by comprising the following steps of:
a, stirring and diluting the recovered waste molybdenum disulfide lithium-based lubricating grease with base oil, and removing solid impurities through centrifugal filtration to obtain a mixture;
b, adding calcium petroleum sulfonate and polyisobutene base oil into the mixture obtained in the step A, and uniformly stirring;
and C, adding the functional additive and uniformly stirring.
2. The method according to claim 1, wherein the base oil in step a is 26# technical white oil, and the amount of the base oil is 2-4 times of the mass of the waste molybdenum disulfide lithium-based grease.
3. The process according to claim 1 or 2, wherein the stirring in step a is performed at 80-100 ℃ for 3-5h.
4. The process of any of claims 1-3, wherein the polyisobutylene base oil in step B is a combination of polyisobutylene PIB1300 base oil and 150BS base oil in an amount of 15% to 50% and 30% to 60% of the mass of the mixture in step A, respectively.
5. The process according to any one of claims 1 to 3, wherein the calcium petroleum sulfonate in step B is calcium petroleum sulfonate T106 in an amount of 4 to 6% by mass of the mixture in step A.
6. The process according to any one of claims 1 to 5, wherein the stirring in step B is carried out at 100 to 110 ℃ for 3 to 5 hours.
7. The method according to any one of claims 1 to 6, wherein the functional additive in step C comprises benzotriazole, and the addition amount of the benzotriazole is 0.03-0.6% of the mass of the mixture in step A.
8. The method according to any one of claims 1 to 7, wherein the functional additive in step C comprises a metal deactivator in an amount of 0.05% to 0.5% by mass of the mixture in step A.
9. The method according to any one of claims 1 to 8, wherein the functional additive in step C comprises graphite powder, and the amount of the graphite powder added is 0.05 to 0.5 percent of the mass of the mixture in step A.
10. The method according to any one of claims 1 to 9, comprising the specific steps of:
a, stirring and diluting the recovered waste molybdenum disulfide lithium-based lubricating grease for 4 hours at 80-100 ℃ by using No. 26 industrial white oil with the mass ratio of 3 times, removing solid impurities through centrifugal filtration to obtain a mixture, and placing the mixture in a stirring kettle for later use;
b, adding 5 percent by mass of calcium petroleum sulfonate T106 and 0.5 percent by mass of water into a stirring kettle, stirring and heating the mixture in the step A under the open air, stirring the mixture for 2 hours at 105 ℃, adding 15 to 50 percent by mass of polyisobutylene PIB1300 base oil into the reaction kettle, adding 30 to 60 percent by mass of 150BS base oil into the mixture in the step A, continuously stirring the mixture for 2 hours at 105 ℃, and cooling the mixture to 60 ℃;
and C, sequentially adding benzotriazole, a metal deactivator T551 and graphite powder into the stirring kettle, stirring for 4 hours, and filtering to obtain the metal deactivator.
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