JP5441884B2 - Lithium hydroxide composition, method for producing lithium hydroxide composition, and method for using lithium hydroxide composition - Google Patents

Description

The present invention relates to a lithium hydroxide composition, a method for producing a lithium hydroxide composition, and a method for using a lithium hydroxide composition.

BACKGROUND OF THE INVENTION Soap concentrates such as lithium soap concentrates, lithium composite soap concentrates and lithium-calcium composite soap concentrates generally thicken base oils to obtain base oil compositions commonly referred to as greases. Available with base oil.

  In addition to the individual components of the grease, other factors that contribute to the final properties and characteristics of the grease are the specific methods and conditions for producing the soap concentrate precursor, soap concentrate and grease. Process conditions such as dispersion, mixing and temperature changes of individual components may be important factors affecting the properties of soap concentrate precursors, soap concentrates and resulting greases such as formed soap microcrystals and fibers. I don't know.

  For example, in situ production of a dilute oil suspension of anhydrous lithium hydroxide monohydrate may be useful in the manufacture of soap concentrates and greases. However, the density of anhydrous lithium hydroxide solids is such that the solids tend to settle by preventing the formation of a stable suspension containing lithium hydroxide.

  Furthermore, in the manufacture of grease, such as lithium grease, lithium hydroxide monohydrate is usually dissolved in a solvent such as water. This water must then be removed during the grease manufacturing process. Water removal consumes time and energy.

  Harris et al., US Pat. No. 5,236,607, heated a mixture of oil, lithium base, and optionally calcium base to 100 ° C. or higher, then added C10-C24 saturated or unsaturated fatty acid, resulting mixture Discloses a method for producing a grease thickened with lithium soap heated until a thickened grease is obtained at a temperature in the range of 110 to 200 ° C.

  International publication WO 2004/031328 A2 is a metal hydroxide having a number average particle size in the range of 20 nm to 2 μm, a surfactant having an HLB of less than 10, mono- and / or poly-carboxylic acid, and oil of lubricating viscosity And a grease composition comprising the reaction product of a stable dispersion. It is also disclosed that this method for producing a grease composition has advantages such as a reduction in reaction time, foaming amount and environmental risk.

  Despite the history of soap concentrates and greases, stable lithium hydroxide compositions that can be used to provide soap concentrates or greases, for example, stable suspensions containing lithium hydroxide and methods of making the same Is still necessary.

SUMMARY OF THE INVENTION The present invention provides a lithium hydroxide composition containing lithium hydroxide, a base oil, and a polymer.
Moreover, this invention provides the manufacturing method of a lithium hydroxide composition including the process which a lithium hydroxide component, a base oil, and a fatty-acid component are made to contact.

The present invention also provides a method of using a lithium hydroxide composition in the manufacture of a soap concentrate comprising the step of contacting the lithium hydroxide composition with a fatty acid component.
The present invention also provides a method of using a lithium hydroxide composition in the manufacture of a grease comprising the step of contacting the lithium hydroxide composition with a fatty acid component and a base oil.

DETAILED DESCRIPTION OF THE INVENTION The present invention provides lithium hydroxide compositions that can be used to obtain soap concentrates or greases. The present invention also provides a method for producing a lithium hydroxide composition that can be used to obtain a soap concentrate or grease.

The present invention can provide one or more of the following advantages.
An advantage of the present invention is that a lithium hydroxide composition is obtained that is stable to separation under long-term storage. In other words, the components of the lithium hydroxide composition do not separate or settle, for example during storage.

  Another advantage of the present invention is that a stable lithium hydroxide composition can be maintained or stored for a period of time and then used when it becomes necessary to produce a soap concentrate or grease.

  Another advantage of the present invention is that flexibility is provided by the lithium hydroxide composition of the present invention. For example, the lithium hydroxide composition may be further used in making soap concentrates or greases, or stored or maintained for future use when soap concentrates or greases are needed. You may keep it.

  Another advantage of the present invention is that a small amount of solvent, for example water, is added or preferably not added during the production of the lithium hydroxide composition of the present invention. When the amount of the solvent added is reduced, a lithium hydroxide composition that is further dried than the lithium hydroxide composition produced using a large amount of the solvent is obtained. For example, during the production of grease, the time required for removing the solvent is usually obtained. And energy can be reduced.

  Another advantage of the present invention is that a lithium hydroxide composition is obtained which is a suitable composition that can be added to other ingredients to obtain a soap concentrate or grease. For example, a lithium hydroxide composition can be obtained at a specific location using the method of the present invention. This lithium hydroxide composition can then be transferred elsewhere to produce a soap concentrate or grease.

  The lithium hydroxide composition of the present invention comprises any suitable form of lithium hydroxide, such as anhydrous lithium hydroxide, crystalline lithium hydroxide monohydrate, lithium hydroxide monohydrate, and combinations thereof Lithium hydroxide containing An example lithium hydroxide composition of the present invention comprises anhydrous lithium hydroxide and is essentially free of lithium hydroxide monohydrate. Anhydrous lithium hydroxide is preferably obtained by dehydration of lithium hydroxide monohydrate according to the method of the present invention.

  The lithium hydroxide composition of the present invention is generally in the form of a suspension containing lithium hydroxide. The lithium hydroxide composition of the present invention is preferably in the form of a stable suspension containing lithium hydroxide.

  The term “suspension” indicates that the lithium hydroxide composition of the present invention contains particles mixed with other particles described herein. For example, lithium hydroxide containing particles may be suspended in a base oil. The term “stable” indicates that the lithium hydroxide composition of the present invention includes a composition that does not readily change its chemical composition or physical state during storage at ambient conditions. For example, lithium hydroxide-containing particles do not readily separate or settle from the lithium hydroxide composition of the present invention after storage for 30 days, preferably 60 days, more preferably 90 days under ambient conditions. The term “homogeneous” indicates having a substantially uniform structure or composition in the lithium hydroxide composition of the present invention.

  The stability of the lithium hydroxide composition of the present invention provides the ability to store the lithium hydroxide composition of the present invention for an extended period of time without separating or precipitating the components of the lithium hydroxide composition. For example, the lithium hydroxide composition of the present invention can be stored for a period of 12 months from manufacture without significant separation or settling of the components of the lithium hydroxide composition. Further, for example, the lithium hydroxide composition of the present invention can be used as a soap concentrate or a component for grease during production. Also, for example, the lithium hydroxide composition of the present invention can be used anytime from production to 12 months. Depending on the storage conditions for storing the lithium hydroxide composition of the present invention, it can be stored for longer than 12 months. Therefore, the lithium hydroxide composition of the present invention can provide flexibility during the manufacturing process of soap concentrate or grease.

  Since the lithium hydroxide composition of the present invention is generally basic and generally not neutralized in the lithium hydroxide composition of the present invention, it should not be regarded as a soap concentrate.

  The lithium hydroxide composition of the present invention generally contains any amount of lithium hydroxide that suitably results in the lithium hydroxide composition of the present invention. The lithium hydroxide composition of the present invention generally contains lithium hydroxide in the range of 10 to 60% by weight, preferably 15 to 50% by weight, more preferably 20 to 40% by weight, based on the total weight of the lithium hydroxide composition. Contains.

  The lithium hydroxide composition of the present invention generally contains any amount of base oil from which the lithium hydroxide composition of the present invention is suitably obtained. In the lithium hydroxide composition of the present invention, the base oil is generally 40 to 90% by weight, preferably 45 to 85% by weight, more preferably 50 to 80% by weight, based on the total weight of the lithium hydroxide composition. contains.

  The lithium hydroxide composition of the present invention generally contains any amount of polymer from which the lithium hydroxide composition of the present invention is suitably obtained. In the lithium hydroxide composition of the present invention, the polymer is generally 0.25 to 20% by weight, preferably 0.5 to 6% by weight, more preferably 1 to 5% by weight based on the total weight of the lithium hydroxide composition. % In the range.

  If a fatty acid component is used, the fatty acid component is neutralized in accordance with the method of the present invention to obtain a fatty acid salt, preferably a lithium salt of hydrogenated castor oil fatty acid, herein referred to as castor oil fatty acid lithium salt. When using a fatty acid component, the lithium hydroxide composition of the present invention will generally contain any amount of fatty acid salt from which the lithium hydroxide composition of the present invention is suitably obtained. When the fatty acid component is used, the lithium hydroxide composition of the present invention generally has a fatty acid salt of 0.5 to 10% by weight, preferably 0.5 to 9% by weight, based on the total weight of the lithium hydroxide composition. More preferably, it is contained in the range of 1 to 8% by weight.

  The ratio of water to lithium hydroxide in the lithium hydroxide composition of the present invention may generally be any ratio that suitably yields the lithium hydroxide composition of the present invention. The water to lithium hydroxide ratio is generally in the range of 0: 1 to 7: 1, preferably 0: 1 to 0.75: 1, more preferably 0: 1 to 0.5: 1. An advantage of the present invention is that a lithium hydroxide composition can be obtained without the addition of water. In other words, the water to lithium hydroxide ratio may be 0: 1. Another advantage of the present invention is that, without limitation, the amount of water used can be reduced to reduce the time and energy required for dehydration of the resulting lithium hydroxide component-containing mixture.

The base oil used to obtain the lithium hydroxide composition, soap concentrate or grease of the present invention, also referred to in the art as a lubricating oil, is usually the same base oil as the base oil normally selected for oil lubrication. It may be. The base oil may be a mineral source, a synthetic source, a plant source, an animal source, or a combination thereof. The mineral source base oil may be a mineral oil, such as a mineral oil produced by solvent refining or hydroprocessing. Base oil synthetic sources, typically a mixture of C ₁₀ -C ₅₀ hydrocarbon polymers, for example α- liquid olefin polymer, ester-type polymer may contain an ether type polymers, and combinations thereof. The base oil may contain a Fischer-Tropsch derived higher paraffinic product. The base oil is preferably a mineral source.

  Preferred examples of synthetic oils include α-olefin oligomers and olefin polymers such as polybutene, polyalkylene glycols such as polyethylene glycol and polypropylene glycol, di-2-ethylhexyl sebacate and di-2-ethylhexyl adipate. Polyol esters such as diesters, trimethylolpropane esters and pentaerythritol esters, perfluoroalkyl ethers, silicone oils, polyphenyl ethers, individual or mixed oils.

Examples of base oils suitable for producing the lithium hydroxide composition of the present invention include medium viscosity mineral oils, high viscosity mineral oils and combinations thereof. The viscosity at 40 ° C. of the base oil suitable for production of the lithium hydroxide composition of the present invention is generally ² to 600 mm ² / s (cSt), preferably 25 to 400 mm ² / s (cSt), more preferably 50. It is the range of -130 mm < ² > / s (cSt).

For example, the viscosity at 40 ° C. of the intermediate viscosity mineral oil suitable for producing the lithium hydroxide composition of the present invention is generally 95 to 115 mm ² / s (cSt), preferably 100 to 110 mm ² / s (cSt), more preferably is in the range of 105~110mm ² / s (cSt), more preferably still a 108mm ² / s (cSt). Further, for example, the viscosity at 40 ° C. of the high-viscosity mineral oil suitable for producing the lithium hydroxide composition of the present invention is generally 120 to 140 mm ² / s (cSt), preferably 125 to 135 mm ² / s (cSt), preferably in the range of 125~130mm ² / s (cSt), more preferably still a 130mm ² / s (cSt).

  Preferred examples of mineral oils that can be used in the production of the lithium hydroxide composition of the present invention include those having the name “HVI” or “MVI”. Suitable examples include oils having the generic names “MVI 500”, “HVI” 250 ”or“ HVI 600 ”. Base oils of the type produced by hydroisomerization of poly α-olefins and waxes can also be used.

  Generally, the method for producing a lithium hydroxide composition of the present invention includes a step of bringing a lithium hydroxide component, a base oil and a polymer into contact with each other. This method generally includes the step of heating the resulting mixture to dehydrate the lithium hydroxide component to obtain the lithium hydroxide composition of the present invention. The mixture containing the lithium hydroxide component may be dehydrated by heating the resulting mixture.

  Suitable lithium hydroxide components for use in the production of the lithium hydroxide composition of the present invention include crystalline lithium hydroxide monohydrate, lithium hydroxide monohydrate, anhydrous lithium hydroxide and combinations thereof. Is mentioned. In producing the lithium hydroxide composition of the present invention, the lithium hydroxide component is preferably crystalline lithium hydroxide monohydrate.

  Examples of polymers suitable for use in the production of the lithium hydroxide composition of the present invention include non-surfactant hydrocarbon polymers that can increase the viscosity of soap concentrates, base oils or greases. Examples of polymers suitable for the production of the lithium hydroxide composition of the present invention include polyolefins, olefin copolymers, hydrogenated styrene-diene copolymers, and combinations thereof. Examples of preferred polymers suitable for the production of the lithium hydroxide composition of the present invention include styrene-ethylene / propylene copolymers, such as styrene--commercially available under the name “Shellvis 60” from member companies of the Shell group. Examples include olefin copolymers including ethylene / propylene copolymers.

  When using a fatty acid component, the fatty acid component is generally neutralized with a lithium hydroxide component during contact to obtain a fatty acid salt. The fatty acid salt said here contains the salt of the fatty acid component demonstrated here. Preferably, the fatty acid salt is a lithium salt of hydrogenated castor oil fatty acid, referred to herein as castor oil fatty acid lithium salt.

  Suitable fatty acid components for producing the lithium hydroxide composition of the present invention include fatty acids, fatty acid esters, fatty glycerides and combinations thereof. The fatty acid component generally contains carbon atoms in the range of 10 to 24 (C10 to C24), preferably 15 to 18 (C15 to C18). The fatty acid component may be saturated or not saturated. Examples of suitable fatty acid components for producing the lithium hydroxide composition of the present invention include oleic acid, palmitic acid, stearic acid, and others derived from beef tallow, hydrogenated fish oil, castor oil, wool, grease and rosin. Carboxylic acids, and combinations thereof. Examples of fatty acid components suitable for producing the lithium hydroxide composition of the present invention include hydrogenated castor oil (HCO), hydrogenated castor oil fatty acid (HCOFA) and combinations thereof, preferably hydrogenated castor oil. A fatty acid (HCOFA) is mentioned. Hydrogenated castor oil (HCO) is a glyceride of 12-hydroxystearic acid. 12-hydroxystearic acid is a preferred fatty acid.

  Hydrogenated castor oil fatty acid (referred to herein as HCOFA) contains 12-hydroxystearic acid in an amount of 85% by weight or more based on the total weight of HCOFA. HCOFA may contain small amounts of other components. Examples of other components include palmitic acid (C16), stearic acid (C18), arachidonic acid (C20), 12-ketostearic acid and combinations thereof. As used herein, the term “hydrogenated castor oil fatty acid” (“HCOFA”) means that 12-hydroxystearic acid is generally added to the process of the present invention at 85% by weight or more, preferably 85-87% by weight, based on the total weight of HCOFA. Refers to a composition containing 12-hydroxystearic acid in an amount to be fed. An example of HCOFA that can be used to make the lithium hydroxide composition of the present invention is CENWAX A, available from Arizona Chemical, Jacksonville, Florida, USA.

  The contact of the components for obtaining the lithium hydroxide composition of the present invention generally means contact performed at a temperature, pressure and time at which the lithium hydroxide composition of the present invention is suitably obtained. Contact generally dehydrates the lithium hydroxide component to obtain the lithium hydroxide composition of the present invention, lithium hydroxide component, preferably lithium hydroxide monohydrate, more preferably crystalline lithium hydroxide monohydrate Including heating. Moreover, you may spin-dry | dehydrate the obtained lithium hydroxide component containing mixture. For example, the method of the present invention including heating and dehydration of a lithium hydroxide component may heat and dehydrate a mixture containing the lithium hydroxide component.

  Dehydration can usually reduce the time and energy required to remove water used during the manufacture of solvents such as soap concentrates or greases. When the fatty acid component is used in the production of the lithium hydroxide composition of the present invention, the fatty acid component is neutralized with the lithium hydroxide component by contact to generally obtain a fatty acid salt, for example, a castor oil fatty acid lithium salt.

  The contacting of the components may be performed in any order that favorably provides the lithium hydroxide composition of the present invention. The contacting of the components may be performed by any means that can suitably obtain the lithium hydroxide composition of the present invention. Suitable contacting means include mixing, stirring, circulation and combinations thereof.

  The temperature during the contact may be any temperature at which the lithium hydroxide component, the resulting lithium hydroxide component-containing mixture or a combination thereof is suitably heated and dehydrated to obtain the lithium hydroxide composition of the present invention. Generally, this is the temperature found by batch processing. This temperature is generally in the range of 80-280 ° C, preferably 85-225 ° C, more preferably 90-215 ° C.

  In order to obtain the lithium hydroxide composition of the present invention, the pressure during contact may be any pressure that suitably heats and dehydrates the lithium hydroxide component, the resulting lithium hydroxide component-containing mixture, or a combination thereof. In general, the pressure is found by batch processing. This pressure is generally atmospheric pressure, ie in the range of 0 kPa to 1380 kPa, preferably 0 to 690 kPa, more preferably 0 to 345 kPa.

  The time during the contact may be any time during which the lithium hydroxide component, the resulting lithium hydroxide component-containing mixture, or a combination thereof is suitably heated and dehydrated to obtain the lithium hydroxide composition of the present invention. In general, the time is known by batch processing. This time is generally in the range of 0.5-8 hours, preferably 1-6 hours, more preferably 1-3 hours.

  The method for producing the lithium hydroxide composition of the present invention may include the use of an antifoaming agent. Examples of suitable antifoaming agents are any antifoaming agents normally used in the soap concentrate or grease field. An example of a suitable antifoaming agent used in the production of the lithium hydroxide composition of the present invention is an antifoaming agent commercially available from Rhein Chemie under the name “PC1644”.

  Some of the polymers that can be used in the process of the present invention, such as a styrene-ethylene / propylene copolymer commercially available under the name “Shellvis 60” from member companies of the Shell group, are being used during the dehydration of mixtures containing lithium hydroxide. , May help reduce foaming. If foaming is reduced, the time can be shortened. In other words, the lithium hydroxide composition of the present invention can be obtained, and the time required for contacting the components can be shortened.

  The lithium hydroxide component present at the beginning of the process of the present invention, preferably lithium hydroxide monohydrate, such that anhydrous lithium hydroxide, also referred to as dehydrated lithium hydroxide, is present in the lithium hydroxide composition of the present invention, Preferably crystalline lithium hydroxide monohydrate is dehydrated. The amount of the lithium hydroxide component dehydrated to obtain anhydrous lithium hydroxide is generally 80 to 100% by weight, preferably 90 to 100% by weight, more preferably 95 to 100% by weight, based on the total amount of the lithium hydroxide component. % Range. For example, if the amount of lithium hydroxide monohydrate to be dehydrated is 100% by weight, the lithium hydroxide composition of the present invention will generally contain anhydrous lithium hydroxide and will generally not contain lithium hydroxide monohydrate. For example, if the amount of lithium hydroxide monohydrate to be dehydrated is 80% by weight, the lithium hydroxide composition of the present invention contains anhydrous lithium hydroxide and lithium hydroxide monohydrate.

  If the method of the present invention is used at different locations, the lithium hydroxide composition of the present invention is obtained at one location, and then the lithium hydroxide composition is sent to the other location, depending on the needs at the location where it was sent. Thus, the flexibility of obtaining a soap concentrate or grease can be provided.

  For example, the lithium hydroxide composition of the present invention can be produced using batch processing. Also for example, the lithium hydroxide compositions of the present invention can be used to obtain soap concentrates or greases using batch processing, conventional reconstitution techniques, or combinations thereof. For example, the lithium hydroxide composition of the present invention is produced using batch processing, and the resulting lithium hydroxide composition of the present invention is then subjected to batch processing, conventional reconstitution technology, extruder technology or a combination thereof. The combination can be used to obtain a soap concentrate or grease.

  Batch processing, generally referred to herein, includes the use of one or more large reaction kettles, which can include, for example, a paddle agitation system, agitation system, a heating system, contents from the bottom to the top of the reaction kettle. An external recirculation system that can be pumped and combinations thereof may be provided. Any size reaction kettle from which the lithium hydroxide composition, soap concentrate or grease of the present invention can be suitably obtained can be used. While the examples disclosed herein used a small reaction kettle generally used in a laboratory setting, the method of the present invention is generally 1,000 to 20,000 liters in size, preferably 2,000 to 15,000. It can be used in industrial scale large reaction kettles in the range of liters, more preferably in the range of 3,000 to 10,000 liters. Examples of suitable reaction kettles include open reaction kettles and pressurized reaction kettles. An example grease reaction kettle includes an agitation system, a heating system, and an external recirculation system that can pump the contents from the bottom to the top of the kettle.

  Reconstitution to obtain a soap concentrate or grease may be performed at the same location as the production site of the lithium hydroxide composition of the present invention or at a location different from the production site of the lithium hydroxide composition of the present invention.

  The lithium hydroxide composition of the present invention may be stored using any temperature and technique used in the field of soap concentrate or grease storage technology. One example of storage is to use drums, buckets, totes and combinations thereof, preferably coated with a caustic resistant liner. The shelf life can be further extended when the lithium hydroxide composition of the present invention is used under an inert atmosphere such as nitrogen or argon. The lithium hydroxide composition of the present invention is generally stored after being cooled.

  The storage temperature of the lithium hydroxide composition of the present invention may be any temperature that is suitably stored. This temperature is generally in the range of 10-40 ° C, preferably 15-35 ° C, more preferably 20-30 ° C.

  In the soap concentrate produced using the lithium hydroxide composition of the present invention, the lithium hydroxide composition is 1 to 20% by weight, preferably 5 to 20% by weight, more preferably, based on the total weight of the soap concentrate. Is contained in the range of 8 to 15% by weight.

  Soap concentrates produced using the lithium hydroxide composition of the present invention include single soap concentrates, composite soap concentrates, and combinations thereof. Complex soap concentrates include single soap concentrates that further include a complexing agent.

  Examples of suitable soap concentrates that can be produced using the lithium hydroxide composition of the present invention include lithium soap concentrates, lithium composite soap concentrates, lithium-calcium soap concentrates, and combinations thereof. Examples of preferred soap concentrates produced using the lithium hydroxide composition of the present invention include lithium soap concentrates and lithium composite soap concentrates.

  Soap concentrates, such as lithium soap concentrates, are prepared by contacting the lithium hydroxide composition of the present invention with a fatty acid compound as described above. The resulting soap concentrate is then contacted with a base oil to obtain a grease. For example, if the lithium hydroxide composition of the present invention is brought into contact with a fatty acid component and a base oil, a soap concentrate can be obtained on-site while obtaining grease.

  The lithium composite soap concentrate is a soap concentrate obtained by introducing a complexing agent into a lithium soap concentrate. Examples of suitable complexing agents include dibasic acids, salts thereof and combinations thereof, such as azelaic acid, boric acid, lithium borate and combinations thereof, preferably boric acid.

  The grease produced using the lithium hydroxide composition of the present invention has a lithium hydroxide composition of 1 to 20% by weight, preferably 2 to 15% by weight, more preferably 2 to 12%, based on the total weight of the grease. It is contained in the range of% by weight.

  Examples of greases that can be produced using the lithium hydroxide composition of the present invention include lithium grease, lithium composite grease, lithium-calcium composite grease, and combinations thereof. Examples of preferable greases that can be produced using the lithium hydroxide composition of the present invention include lithium grease and lithium composite grease.

Grease produced using the lithium hydroxide composition of the present invention imparts specific desired properties including oxidation stability, tackiness, extreme pressure properties, corrosion protection, friction and wear reduction properties and combinations thereof. Thus, additional additives may be included in amounts usually used in this field of application.
Examples of suitable additional additives include antioxidants, rust inhibitors, antiwear and extreme pressure agents, pour point depressants, metal deactivators and combinations thereof.

  In the grease produced using the lithium hydroxide composition of the present invention, the above-mentioned additional additive is 0.1 to 10% by weight, 0.1 to 5% by weight, more preferably 0%, based on the total weight of the grease. .1 to 2% by weight, still more preferably 0.2 to 1% by weight. For example, with a combination of additional additives, it may be necessary to obtain a high weight percent, for example, 10 weight percent additional additive.

Examples of suitable additional additives include zinc salts such as zinc dialkyl or diaryl dithiophosphates, borates, molybdenum dithiophosphates, substituted thiadiazoles such as dialkoxyamines and substituted organic phosphates, amine phosphates, sulfuric acid from natural or synthetic sources. Sperm Whale Oil, Sulfated Lard, Sulfated Ester, Sulfated Fatty Acid Ester, Sulfated Material, For example, Organic Phosphate and Triphenyl Phosphorus of Formula (OR) ₃ P = O (where R is an alkyl, aryl or aralkyl group) Polymeric nitrogen / phosphorus compounds prepared by reaction with rothionate; one or more overbased metal-containing detergents such as calcium or magnesium alkylsalicylate, alkylaryl sulfonates or alkyl sulfonates; ashless dispersants such as polyisobutenyl anhydride Oxalic acid Amines or esters; antioxidants such as hindered phenols or amines such as phenyl α-naphthylamine; rust inhibitors such as zinc naphthenate; friction modifiers; viscosity index improvers; pour point depressants; The combination of is mentioned. Solid materials such as graphite, molybdenum disulfide fine powder, talc, metal powder, and various polymers such as polyethylene wax may also be added to impart special properties.

  When the term aryl is referred to herein, this aryl group is preferably a phenyl group or a naphthyl group. When referring to the term aralkyl here, this aralkyl group is preferably a benzyl group or methyl naphthenate.

  Greases made using the lithium hydroxide composition of the present invention may contain additional additives including a single zinc dithiophosphate or a combination of two or more zinc dithiophosphates. Greases produced using the lithium hydroxide compositions of the present invention may contain additional additives including a single ashless dithiocarbamate or a combination of two or more ashless dithiocarbamates.

Example 1 (comparative example)
A grease reaction kettle equipped with an agitation system, a gas flame heating system, and an external recirculation system capable of pumping the contents from the bottom to the top of the kettle has a viscosity at 40 ° C. (104 ° F.) of 50 mm ² / s ( cSt) High Viscosity Index (HVI) mineral oil (generally having the name “HVI 250”) 4999.5 g, lithium hydroxide monohydrate 4999.5 g and defoamer (obtained from Rhein Chemie under the name “PC1644”) 1g) was charged. The resulting mixture was stirred and heated above 212 ° F. (100 ° C.) at a heating rate of 4.4 ° F. (2.444 ° C.) / Min. Foaming was observed at 217 ° F (102.8 ° C). A few drops of antifoam PC1644 were added. Foaming decreased in a few minutes and then the mixture was foamed again. After 4 hours, the outage stopped. After the foaming ceased, the reaction kettle was heated to 300 ° F. (148.9 ° C.). The reactor kettle temperature was maintained at 300 ° F. (148.9 ° C.) for 20 minutes while stirring the reactor contents and circulating from bottom to top using a gear pump. After 20 minutes, heating of the kettle contents was stopped and the kettle was stirred for 2 hours and then cooled to room temperature (70-80 ° F.) (21.11-26.67 ° C.). The resulting lithium hydroxide composition, after dehydration of lithium hydroxide monohydrate, was 36.36% by weight of dehydrated lithium hydroxide, 63.63% by weight of HVI 250 base oil, and 0% of PC1644 antifoaming agent. Contained 0.01% by weight. The resulting lithium hydroxide composition was then transferred to a plastic 5 gallon bucket. After 24 days storage at room temperature (70-80 ° F.) (21.11-26.67 ° C.), the upper half of the container contained the base oil and the dehydrated lithium hydroxide had settled to the bottom of the bucket. After storage at the room temperature for 5 months, the appearance was almost the same as in the initial 24 days.

Example 2 (Example)
4600 g of high viscosity index (HVI) mineral oil (generally having the name “HVI 250”) having a viscosity at 40 ° C. (104 ° F.) of 50 mm ² / s (cSt) in the grease reaction kettle described in Example 1; Charged was 5000 g of lithium monohydrate, 300 g of a styrene-ethylene / propylene copolymer (obtained under the name “Shellvis 60” from a member company of the Shell group), and 100 g of hydrogenated castor oil fatty acid (HCOFA). The resulting mixture was stirred and heated to 223.5 ° F. (106.4 ° C.) at a heating rate of 3 ° F. (1.667 ° C.) / Min. The temperature was maintained at 223.5 ° F. (106.4 ° C.) for 75 minutes, and the mixture was dehydrated (hydrogenated castor oil fatty acid was neutralized with lithium hydroxide and the resulting water was distilled). No foaming was observed during dehydration of the mixture. The temperature of the reaction kettle contents was then raised to 400 ° F. (148.9 ° C.) over a period of 60 minutes, but no change was seen in the resulting composition. The composition was circulated for 20 minutes and cooled overnight. After dehydration of lithium hydroxide monohydrate and neutralization of HCOFA, the resulting lithium hydroxide composition was HVI 250 base oil 58.53 wt%, dehydrated lithium hydroxide 36.35 wt%, castor oil It contained 1.30% by weight of a fatty acid lithium salt and 3.82% by weight of Shellvis 60 polymer. After storing this lithium hydroxide composition in a 5 gallon bucket at room temperature (70 to 80 ° F.) (21.11 to 26.67 ° C.) for 5 months, the lithium hydroxide composition in the bucket is initially placed. It had the same appearance and consistency as the lithium hydroxide composition in the bucket.

Example 3 (Example)
The grease reaction kettle described in Example 1 has a viscosity of styrene-ethylene / propylene copolymer (commercially available under the name “Shellvis 60” from a member company of Shell Group) at 600 g and 40 ° C. (104 ° F.). 9400 g of high viscosity index (HVI) mineral oil (generally having the name “HVI 250”) of 50 mm ² / s (cSt) was charged. The resulting mixture was stirred and heated to 300 ° F. (148.9 ° C.) at a heating rate of 3 ° F. (1.667 ° C.) / Min and then cooled to 212 ° F. (100 ° C.) with stirring. . A viscous 6% concentrate of Shellvis 60 was obtained in HVI 250 and stored overnight.

The resulting 5000 g Shellvis 60 6% concentrate and 5000 g lithium hydroxide monohydrate in HVI 250 were then added to an empty grease reaction kettle and heated to 300 ° F. (148.9 ° C.) with stirring. did. After circulating for 20 minutes, heating to the reaction kettle was stopped. The resulting lithium hydroxide composition was pumped into a 230 ° F. (110 ° C.) bucket. The composition appeared thick and smooth. After dehydration of lithium hydroxide monohydrate, the resulting lithium hydroxide composition is 59.82 wt.% HVI 250 base oil, 36.36 wt.% Dehydrated lithium hydroxide, and 3. 3. Shellvis 60 polymer. It contained 82% by weight. After storing this in a bucket at room temperature (70-80 ° F.) (21.11-26.67 ° C.) for 12 months, the lithium hydroxide composition in the bucket is the lithium hydroxide in the bucket when initially placed. It had the same appearance and consistency as the composition.
Table 1 discloses an overview of various types of information in Examples 1 to 3.

US Pat. No. 5,236,607 International publication WO 2004/031328 A2

Claims (8)

A lithium hydroxide composition in the form of a stable suspension comprising a polymer comprising lithium hydroxide, a base oil and an olefin copolymer including a styrene-ethylene / propylene copolymer ,
The lithium hydroxide is present in an amount ranging from 20 to 40% by weight relative to the total weight of the composition; the base oil is present in an amount ranging from 50 to 80% by weight relative to the total weight of the composition; and The polymer is present in an amount ranging from 0.5 to 6% by weight relative to the total weight of the composition;
Said composition .   The lithium hydroxide composition according to claim 1, wherein the base oil is selected from the group consisting of medium viscosity mineral oil, high viscosity mineral oil, and combinations thereof.   The lithium hydroxide composition according to claim 1, wherein the composition further comprises a fatty acid salt, and the fatty acid salt is present in an amount ranging from 0.5 to 10% by weight relative to the total weight of the composition. The lithium hydroxide composition according to claim 3 , wherein the fatty acid salt contains a salt of a fatty acid component selected from the group consisting of fatty acids, fatty acid esters, fatty glycerides, and combinations thereof.   The lithium hydroxide composition according to claim 1, which is produced by a method comprising a step of contacting a polymer comprising an olefin copolymer comprising a lithium hydroxide component, a base oil, and a styrene-ethylene / propylene copolymer. Production of a lithium hydroxide composition in the form of a stable suspension comprising contacting a lithium hydroxide component with a base oil and a polymer comprising an olefin copolymer including a styrene-ethylene / propylene copolymer. A method ,
The lithium hydroxide is present in an amount ranging from 10 to 60% by weight relative to the total weight of the composition; the base oil is present in an amount ranging from 40 to 90% by weight relative to the total weight of the composition; and The polymer is present in an amount ranging from 0.25 to 20% by weight relative to the total weight of the composition;
The manufacturing method . Water for the production of soap concentrates comprising the step of contacting a lithium hydroxide composition comprising a polymer comprising an olefin copolymer comprising lithium hydroxide, a base oil and a styrene-ethylene / propylene copolymer with a fatty acid component. A method of using a lithium oxide composition comprising:
The lithium hydroxide is present in an amount ranging from 10 to 60% by weight relative to the total weight of the composition; the base oil is present in an amount ranging from 40 to 90% by weight relative to the total weight of the composition; and The polymer is present in an amount ranging from 0.25 to 20% by weight relative to the total weight of the composition;
Said method . Lithium hydroxide, a base oil and a lithium hydroxide composition comprising a polymer comprising an olefin copolymer including a styrene-ethylene / propylene copolymer, for contacting a fatty acid component and the base oil with a fatty acid component and a base oil. A method of using a lithium hydroxide composition comprising:
The lithium hydroxide is present in an amount ranging from 10 to 60% by weight relative to the total weight of the composition; the base oil is present in an amount ranging from 40 to 90% by weight relative to the total weight of the composition; and The polymer is present in an amount ranging from 0.25 to 20% by weight relative to the total weight of the composition;
Said method .