EP2344612A1 - Overbased metal carboxylate complex grease and process for making - Google Patents
Overbased metal carboxylate complex grease and process for makingInfo
- Publication number
- EP2344612A1 EP2344612A1 EP09811873A EP09811873A EP2344612A1 EP 2344612 A1 EP2344612 A1 EP 2344612A1 EP 09811873 A EP09811873 A EP 09811873A EP 09811873 A EP09811873 A EP 09811873A EP 2344612 A1 EP2344612 A1 EP 2344612A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grease
- acid
- alkaline earth
- earth metal
- overbased
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M117/00—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof
- C10M117/02—Lubricating compositions characterised by the thickener being a non-macromolecular carboxylic acid or salt thereof having only one carboxyl group bound to an acyclic carbon atom, cycloaliphatic carbon atom or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M121/00—Lubricating compositions characterised by the thickener being a compound of unknown or incompletely defined constitution
- C10M121/04—Reaction products
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/10—Petroleum or coal fractions, e.g. tars, solvents, bitumen
- C10M2203/1006—Petroleum or coal fractions, e.g. tars, solvents, bitumen used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/26—Overbased carboxylic acid salts
- C10M2207/2613—Overbased carboxylic acid salts used as thickening agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/08—Resistance to extreme temperature
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/12—Inhibition of corrosion, e.g. anti-rust agents or anti-corrosives
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/26—Waterproofing or water resistance
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/40—Low content or no content compositions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/62—Food grade properties
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/74—Noack Volatility
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Semi-solids; greasy
Definitions
- the invention relates to a complex grease prepared from an overbased alkaline earth metal soap of a fatty acid. More particularly, the invention relates to a vaterite grease prepared from an overbased metal carboxylate using one or more complexing agents during the manufacturing process.
- Making overbased alkaline earth metal soap greases includes either a one-step or two-step process.
- the amorphous overbased alkaline metal soaps which can be carboxylates, sulfonates, phenates or other organic acids based, or mixture of these, are first isolated, then these amorphous overbased alkaline metal soaps are converted to the crystalline form.
- the amorphous overbased alkaline metal soap normally is in the form of a micelle structure with an amorphous carbonate core dispersed in a hydrocarbon liquid of suitable viscosity.
- Such liquid grease precursor normally has a high TBN of 200-400 mg KOH/gm or even higher.
- the amorphous overbased alkaline metal soap While in a one-step process, the amorphous overbased alkaline metal soap is not separated, conversion from amorphous form to crystalline form is accomplished in-situ in the same reactor or some grease kettle in one step. Associated with this morphological change from amorphous form to crystalline form, the initial overbased material turns from a Newtonian liquid into a non-Newtonian gel or thixotropic grease. Unlike most of the neutral or near neutral metal soap thickened greases, either as simple metal soap greases or complex soap greases, the high TBN overbased metal soap thickened grease possesses many of the desirable performance features without the use of additives. Such performance features include good antiwear property, high load-carrying capability, high dropping point, excellent shear stability or mechanical strength, and many others depending on the nature of the overbased metal soap thickener and chemical process involved in grease manufacturing.
- the thickener microstructure of the crystalline material, or the matrix, in the grease enables the uptake and release of the lubricious oil. This is even more important for grease with overbased metal soap thickeners, since the thickener microstructure not only enables uptake and release of the lubricious oil, the thickener itself also acts as performance additives and provides many of performance attributes for the finished grease.
- the processing conditions such as temperature, pressure, residence times and saponification stoichiometry have tremendous influence on the thickener microstructure formed.
- the grease manufacturing process can also be characterized as one-stage or multi-stage process, such as conversion stage, complexing stage and finishing stage, based on the physical change and chemical reaction involved in grease making process. Therefore as a result, the process conditions and process stages will determines many of the performance attributes of the finished grease.
- Thixotropic greases or grease-like overbased metal carboxylate or other overbased metal-containing compositions having acid neutralizing and detergency properties, and having utility for a variety of uses such as, for instance, in automobile and truck body undercoatings for rust inhibition, and for various other purposes, are known to the art.
- Such greases or grease-like compositions have gone into quite widespread use either as such, or admixed with other ingredients to produce compositions for use in a variety of environments, and, generally speaking, they are characterized by reasonably good extreme pressure and antiwear properties, high dropping points, reasonably good resistance to mechanical breakdown, salt spray and water-corrosion resistance, thermal stability at high temperatures, and other desirable properties.
- Overbased metal carboxylates are generally produced by carbonating a mixture of hydrocarbons, carboxylic acid, metal oxide (calcium oxide for example) or metal hydroxide (calcium hydroxide for example) and promoters such as methanol and water.
- the calcium oxide or hydroxide reacts with the gaseous carbon dioxide to form calcium carbonate.
- the carboxylic acid is neutralized with an excess of CaO or Ca(OH) 2 to form the carboxylate.
- the prior art known processes for overbasing calcium carboxylates produce high alkaline materials having a TBN of 300 mg KOH/gm or higher.
- the TBN is the measurement of alkaline reserve, which is the number of milligrams of potassium hydroxide equivalent to the amount of acid required to neutralize the alkaline constituents present in one gram of sample.
- An additive having a total base number higher than that can be obtained from a stoichiometrically prepared calcium carboxylate alone is commonly termed “overbased” or, alternatively, is termed “superbasic”.
- non-Newtonian colloidal disperse systems include, among many others, water; alcohols, for instance, methanol, isobutanol, n-pentanol and many others or mixtures thereof or mixtures of alcohols with water; alkylene glycols; mono-lower alkyl ethers of alkylene glycols such as monomethylether of ethylene glycol; and numerous others such as lower aliphatic carboxylic acids exemplified by acetic acid and propionic acid; ketones; aldehydes; amines; phosphorus acids; alkyl and aromatic amines; certain imidazolines; alkanolamines; and, carbon dioxide as such, or better in combination with water.
- the resulting non-Newtonian colloidal disperse systems may be in the form of gels or
- the conversion agents such as water and acetic or propionic acid
- the conversion agents when added to the Newtonian solution of amorphous calcium carbonate and calcium carboxylate, provides conversion of the amorphous calcium carbonate to vaterite, a spherical form of crystalline calcium carbonate, and none of the calcite is formed.
- This is in contrast to the overbased calcium sulfonates, which when treated with the conversion agents, form calcite or mixtures of calcite and vaterite micelles from the amorphous overbased calcium sulfonates.
- one aspect of the invention is to provide an overbased metal carboxylate complex grease.
- the overbased metal carboxylate complex grease includes an overbased alkaline earth metal salt of a fatty acid, wherein the alkaline earth metal salt has an alkaline earth metal content of at least 14.5% and a non-volatile matter content of at least 95%, conversion agents that include a hydrocarbon liquid, water, lime, a glycol, and a short chain carboxylic acid selected from the group consisting of acetic acid and propionic acid, and at least one complexing agent selected from the group consisting of phosphoric acid, boric acid, a Cj 2 - C 24 aliphatic monocarboxylic acid and a C 12 - C24 fatty acid.
- Another aspect of the invention is to provide a method for preparing a complex grease.
- the method includes the steps of:
- the alkaline earth metal salt has an alkaline earth metal content of at least 14.5% and a non-volatile matter content of at least 95%;
- the overbased alkaline earth metal salt of a fatty acid with conversion agents to form a Newtonian grease precursor, wherein the conversion agents comprise: a hydrocarbon liquid;
- a short chain carboxylic acid selected from the group consisting of acetic acid and propionic acid
- the Newtonian grease precursor with at least one complexing agent to form a non-Newtonian complex grease, wherein the at least one complexing agent is selected from the group consisting of phosphoric acid, boric acid, a C 12 - C 24 aliphatic monocarboxylic acid and a C 12 - C24 fatty acid.
- a further aspect of the invention is to provide a method for preparing a complex grease.
- the method includes the steps of:
- the alkaline earth metal salt has an alkaline earth metal content of at least 14.5% and a non-volatile matter content of at least 95%;
- a short chain carboxylic acid selected from the group consisting of acetic acid and propionic acid; and reacting the non-Newtonian grease precursor with at least one complexing agent to form a non-Newtonian complex grease, wherein the at least one complexing agent is selected from the group consisting of phosphoric acid, boric acid, a Ci 2 - C 2 4 aliphatic monocarboxylic acid and a C 12 - C 24 fatty acid.
- FIG. 1 is a representative X-Ray Diffraction spectrum of the vaterite form of calcium carbonate
- FIG. 2 is a representative X-Ray Diffraction spectrum of the calcite form of calcium carbonate
- FIG. 3 a representative X-Ray Diffraction spectrum of an overbased calcium oleate carboxylate used in the preparation of the overbased calcium oleate complex grease
- FIG. 4 is a representative X-Ray Diffraction spectrum of an overbased calcium oleate complex grease according to one embodiment of the invention.
- FIG. 5 are representative FTIR spectra of an overbased calcium sulfonate grease, an overbased calcium oleate carboxylate used in the preparation of the overbased calcium oleate complex grease, and an overbased calcium oleate complex grease according to one embodiment of the invention;
- FIGS. 6a-6e are representative FTIR spectra of different overbased calcium oleate complex greases
- FIG. 7 is a is a representative FTIR spectra of an overbased calcium oleate carboxylate used in the preparation of the overbased calcium oleate complex grease and an overbased calcium oleate complex grease according to one embodiment of the invention
- FIGS. 8a-8d are representative FTIR spectra of commercially available overbased calcium sulfonate greases.
- FIG. 9 is a representative FTIR spectra of a commercially available calcium sulfonate complex grease (A), calcium oleate complex grease (B), and Newtonian overbased calcium oleate material (C); and
- FIG. 10 is a representative FTIR spectra showing a change from amorphous to crystalline calcium carbonate during the formation of the calcium oleate complex grease.
- a Newtonian overbased alkaline earth metal carboxylate along with conversion agents that include water, lime, a hydrocarbon liquid, a glycol and a short chain carboxylic acid such as acetic acid and propionic acid, are reacted resulting in the formation of an intermediate, overbased grease precursor.
- the overbased grease precursor may then be combined, either alone or in combination, with complexing agents that include phosphoric acid, boric acid and/or an aliphatic monocarboxylic or fatty acid such as a C i 2 - C 24 acid.
- the Newtonian overbased alkaline earth metal carboxylate When reacted with conversion agents, the Newtonian overbased alkaline earth metal carboxylate is converted into a thixotropic, non-Newtonian gelled grease precursor predominantly containing vaterite.
- the vaterite containing grease precursor When combined with the complexing agents, the vaterite containing grease precursor is further modified to form an overbased complex grease having improved yield in terms of high oil incorporation and improved properties for mechanical shear resistance, extreme pressure, anti-wear and dropping point temperature.
- a Newtonian overbased alkaline earth metal carboxylate may react first with conversion agents then subsequently with complexing agents before the conversion from Newtonian overbased grease precursor to a non- Newtonian grease has completed.
- the conversion agents include water, lime, a hydrocarbon liquid, a glycol and a short chain carboxylic acid such as acetic acid and propionic acid.
- the complexing agents include phosphoric acid, boric acid and/or an aliphatic monocarboxylic or fatty acid such as a Ci 2 - C 2 4 acid.
- the Newtonian overbased alkaline earth metal carboxylate When reacted with both conversion and complexing agents, the Newtonian overbased alkaline earth metal carboxylate is converted into a non-Newtonian complex grease predominantly containing vaterite in one single stage reaction for production efficiency and process simplification.
- the vaterite containing complex grease formed through this one single stage reaction has improved properties for mechanical shear resistance, extreme pressure, anti-wear and dropping point temperature.
- the process for preparing the complex grease is a two-step process, the first step includes the process for manufacturing of a suitable Newtonian overbased metal soap solution and the second step includes a one stage reaction which converts the overbased metal soap solution from a Newtonian solution to a non- Newtonian grease.
- the Newtonian overbased alkaline earth metal carboxylate and conversion agents are reacted for a predetermined amount of time such that the intermediate overbased grease precursor remains a Newtonian solution.
- Subsequent addition of the complexing agents converts the Newtonian intermediate overbased grease precursor to a non- Newtonian predominantly vaterite containing, modified overbased calcium carboxylate complex grease.
- the process for preparing the complex grease is a two-step process, wherein the first step includes the process for manufacturing of a suitable Newtonian overbased metal soap solution and the second step includes a two stage reaction.
- the first stage reaction includes reacting the Newtonian overbased alkaline earth metal carboxylate with the conversion agents for a predetermined amount of time such that the intermediate overbased grease precursor is a thickened, thixotropic non-Newtonian, gelled product.
- the addition and reaction of the complexing agents with the grease precursor converts the thickened, non-Newtonian intermediate overbased grease precursor to a non-Newtonian predominantly vaterite containing, modified overbased calcium carboxylate complex grease.
- the alkaline earth metal of the carboxylate is selected from the group consisting of calcium, barium, magnesium and strontium. These metals are derived from metal oxides and hydroxides, and in some instances, metal sulfides and hydrosulfides.
- the grease precursor can include an overbased calcium carboxylate.
- the carboxylic acid portion of the metal carboxylate includes fatty acids, including C 8 -C 30 saturated, unsaturated carboxylic acids of 8 to 30 carbon atoms, either alone or in combination with each other, or reactive equivalents of carboxylic acids.
- Examples of useful carboxylic acids and fatty acids include but are not limited to caprylic acid, capric acid, lauric acid, myristic acid, myristoleic acid, 2-ethylhexanoic acid, decanoic acid, dodecanoic acid, pentadecanoic acid, palmitic acid, palmitoleic acid, stearic acid, 12-hydroxystearic acid, oleic acid, ricinoleic acid, linoleic acid, linolenic acid, arachidic acid, gadoleic acid, behenic acid, erucic acid, and mixtures of any of these acids.
- the formation of the metal carboxylate may also include an alcohol that promotes the formation of the overbased alkaline earth metal carboxylate.
- the alcohol includes aliphatic alcohols that contain at least 8 carbon atoms. In one example, an aliphatic alcohol having 8 to 14 carbon atoms or more can be used. Examples of such aliphatic alcohols include isodecanol, dodecanol, octanol, tridecanol, tetradecanol or mixtures thereof. It has been found that when a higher aliphatic alcohol is employed in making the overbased product, phenol may be excluded from the reaction as a promoter.
- the overbased metal carboxylate utilized in the making of the complex grease is prepared containing at least 12.5% by weight or more of the alkaline earth metal as calcium.
- a polyol can be a glycol or a glycol ether.
- the glycol or glycol ether may be selected from the group consisting of diethylene glycol monobutyl ether (butyl Carbitol®), triethylene glycol, dipropylene glycol, diethylene glycol monomethyl ether, ethylene glycol monobutyl ether, and mixtures thereof.
- the process for preparing the overbased calcium carboxylate for use in the making of the complex grease includes reacting an alkaline earth metal base and a fatty acid with an equivalent ratio of metal base to the fatty acid being greater than 1:1 in the presence of at least one liquid hydrocarbon, an alcohol, and a polyol such as a glycol ether.
- the mixture may be acidified and carbonated to produce amorphous alkaline earth metal carbonate within the mixture.
- a dispersion may be added containing alkaline earth metal base, liquid hydrocarbon and an alcohol having at least 8 carbon atoms in relative amounts at a controlled rate of base addition to produce a stable liquid reaction product.
- water is removed from the reaction product to produce a shelf stable, flowable liquid overbased alkaline earth metal salt.
- the entire process may be conducted in the absence of free oxygen and, for this purpose, an atmosphere of nitrogen may be used.
- an acidic gas as used in this specification and in the claims is meant a gas which upon reaction with water will produce an acid.
- gases as sulfur dioxide, sulfur trioxide, carbon dioxide, carbon disulfide, hydrogen sulfide, etc.
- carbon dioxide the alkaline earth carbonate is formed.
- sulfur gases the sulfate, sulfide and sulfite salts are formed.
- the mixture may be heated to a temperature which is sufficient to drive off some of the water contained in the mixture or the water generated during the reaction of the base and the carboxylic acid can be retained during the overbasing reactions.
- the treatment of the mixture with the carbon dioxide preferably is conducted at elevated temperatures, and the range of temperatures used for this step may be any temperature above ambient temperature in the range from 75 0 C (165 0 F) to 200 0 C (390 0 F). Higher temperatures may be used such as 250 0 C (480 0 F), but there is no apparent advantage in the use of such higher temperatures. Ordinarily, a temperature of 80 0 C (175 0 F) to 150 0 C (300 0 F) is satisfactory.
- the overbased material may be distilled or vacuum stripped at a temperature up to 165 0 C (330 0 F) to remove the volatile components of the reaction product.
- "stripping" refers to the removal of a volatile component from a less volatile substance. The vacuum stripping proceeds until the final product has a measured alkaline earth metal content of at least 14.5% and a non-volatile matter content of at least 95%.
- the overbased material used in the preparation of the complex grease is believed to be a thermodynamically stable microemulsion.
- the microemulsion has micelles and a continuous phase.
- the micelles consist of an alkaline earth metal carbonate and an alkaline earth metal carboxylate of the fatty acid.
- the continuous phase of the microemulsion consists of the liquid hydrocarbon and the alcohol.
- Suitable conversion agents utilized in preparation of the overbased thixotropic, non-Newtonian gelled grease precursor include water; a hydrocarbon liquid including aliphatic hydrocarbons that are branched, straight chain or saturated cyclic structures, mineral spirits, non- aromatic hydrocarbons and polyalphaolefins (PAOs), Drakesol® 600 is a suitable example of such hydrocarbon liquid; lime (CaOH 2 ); alcohols, for instance, methanol, isobutanol, n-pentanol and many others or mixtures thereof or mixtures of alcohols with water; alkylene glycols; mono- lower alkyl ethers of alkylene and propylene glycols such as monomethylether of ethylene glycol and propylene glycol; and numerous others such as lower aliphatic carboxylic acids including acetic acid and propionic acid.
- a hydrocarbon liquid including aliphatic hydrocarbons that are branched, straight chain or saturated cyclic structures, mineral spirits, non- aromatic hydrocarbons and poly
- Newtonian, gelled grease precursor to form a complex grease include water; phosphorus acids such as phosphoric acid; alkyl and aromatic amines; boron acids, including boric acid, tetraboric acid and metaboric acid; and esters of such boron acids; and aliphatic or fatty acids of 12 to 24 carbon atoms which include dodecanoic acid, palmitic acid, stearic acid, oleic acid, ricinoleic acid, 12-hydroxystearic acid.
- the hydroxy fatty acids, particularly hydroxystearic acid typically provide increased thickening to the grease when compared to unsubstituted fatty acids.
- a one-stage reaction for preparing the complex grease includes heating a Newtonian overbased calcium oleate material with conversion agents that include water, lime, a hydrocarbon solvent, propylene glycol and acetic acid under conditions favoring the formation of calcium carbonate crystals in the form of predominantly vaterite crystals, and not calcite, to form a Newtonian overbased grease precursor.
- the Newtonian overbased grease precursor is then combined with at least one complexing agent that includes water, phosphoric acid, boric acid and/or 12-hydroxystearic acid.
- the Newtonian grease precursor is subsequently converted into a predominantly vaterite containing thickened, non-Newtonian complex grease.
- a two-stage reaction for preparing the complex grease includes heating a Newtonian overbased calcium oleate material with conversion agents that include water, lime, a hydrocarbon solvent, propylene glycol and acetic acid under conditions favoring the formation of calcium carbonate crystals in the form of predominantly vaterite crystals, and not calcite, to form a thixotropic intermediate non-Newtonian, gelled grease precursor.
- the grease precursor is then combined with at least one complexing agent that includes water, phosphoric acid, boric acid and/or 12-hydroxystearic acid.
- the thixotropic intermediate non-Newtonian gelled grease precursor is subsequently converted into a predominantly vaterite containing non-Newtonian complex grease.
- overbased calcium oleate 96.2% non-volatile matter (NVM) and 330 total base number (TBN), 100.09 g of lime (CaOH 2 ), and the conversion agents including 200.06 g of water, 100.05 g of propylene glycol and 150.07 g of acetic acid.
- the mixture was heated with stirring to 104 0 C (220 0 F) for approximately one hour and thirty minutes to form an intermediate Newtonian grease precursor.
- the complexing agents were added to the thickened, intermediate non-Newtonian grease precursor.
- the secondary conversion agents included 100.13 g of water, 149.99 g of 12-hydroxystearic acid and 100.02 g of phosphoric acid.
- the mixture was heated with stirring at 104 0 C (220 0 F) for approximately one hour to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate and calcium phosphate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately one hour and forty five minutes to form a predominantly vaterite containing calcium 12- hydroxystearate modified overbased calcium oleate non-Newtonian complex grease.
- This complex grease may be considered a food grade complex grease.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours to form a predominantly vaterite containing non-Newtonian calcium 12- hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours to form a predominantly vaterite containing non-Newtonian calcium 12- hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours to form a predominantly vaterite containing non-Newtonian calcium 12- hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours and five minutes to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours to form a predominantly vaterite containing non-Newtonian calcium 12- hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours and thirty minutes to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately one hour and forty-five minutes to form a predominantly vaterite containing non- Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately one hour and twenty minutes to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately two hours to form a predominantly vaterite containing non- Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately one hour and fifteen minutes to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- the mixture was heated with stirring in a temperature range from 104 0 C (220 0 F) to 138 0 C (280 0 F) for approximately one hour and thirty minutes to form a predominantly vaterite containing non-Newtonian calcium 12-hydroxystearate modified overbased calcium oleate complex grease.
- This complex grease may be considered a food grade complex grease.
- the product was analyzed to contain no detectable calcite or aragonite by X-ray diffraction analysis.
- a distinguishing feature of the overbased calcium oleate complex greases, as prepared above, includes formation of calcium carbonate crystals in the form of predominantly vaterite crystals, and not calcite in the complex grease.
- X-Ray Diffraction (XRD) spectra are shown for vaterite and calcite respectively.
- FIG. 3 shows an XRD spectrum of a 15% overbased calcium oleate carboxylate used in the preparation of the overbased calcium oleate complex grease
- FIG. 4 shows an XRD spectrum of the overbased calcium oleate complex grease. Based upon the XRD data of FIG.
- the 15% overbased calcium oleate carboxylate primarily contains amorphous calcium carbonate, with substantially limited, in any, detectable levels of calcium carbonate as calcite and/or vaterite.
- the XRD data for the overbased calcium oleate complex grease as seen in FIG. 4, reveals that the vaterite is the predominant form of calcium carbonate present in the grease. It appears that the calcite form of calcium carbonate is not present in the grease.
- FIG. 5 Further evidence of the presence of the vaterite form of calcium carbonate present in the overbased calcium oleate complex grease is seen in FIG. 5.
- Fourier- Transform Infrared Spectroscopy (FTIR) spectra are presented for three different materials. The key feature in these spectra is the peak position within the 860-880 cm “1 region. Peaks in this region correspond to a form of calcium carbonate. Typically, a peak within the region from 858-862 cm “1 correspond to amorphous calcium carbonate; a peak within the range from 880-885 cm “1 corresponds to the calcite form of calcium carbonate; and a peak within the range from 875-877 cm “1 corresponds to the vaterite form of calcium carbonate. As seen in FIG.
- FTIR Fourier- Transform Infrared Spectroscopy
- the spectrum having a peak at 885.1 cm “1 corresponds to a commercially available overbased calcium sulfonate grease that is shown to be predominantly the calcite form of calcium carbonate.
- the spectrum having a peak at 856.7 cm “1 corresponds to a commercially available overbased calcium oleate carboxylate liquid that contains predominantly amorphous calcium carbonate.
- the spectrum with a peak at 875.9 cm “1 corresponds to an overbased calcium oleate complex grease according to one embodiment of the invention that contains predominantly the vaterite form of calcium carbonate.
- Infrared analysis was also used to monitor and characterize the complex grease conversion process. It is known that infrared absorbance peaks at about 863 cm “1 , 877cm “1 and 882 cm “1 are characteristic of amorphous calcium carbonate, vaterite calcium carbonate and calcite calcium carbonate respectively.
- FTIR spectrum showed clearly that Newtonian overbased calcium oleate material has a representative broad peak centered at 860 cm "1 . Both peak position and broadness of the peak are evidence indicating the amorphous nature of the calcium carbonate contained in the overbased calcium oleate material.
- the overbasing chemistry provides for grease formulations that can be registered as food grade, biodegradable and biobased.
- the overbased complex grease contains calcium oleate, promoters made from materials that include propylene glycol and conversion agents that include water, lime, 12-hydroxystearic acid, and acetic acid, all of which are listed under the NSF registry for incidental food contact.
- the hydrocarbon solvents used in the grease formulations can be either synthetic or non- synthetic.
- the gelled material can be adjusted to the NLGI grade grease by using a suitable oil to yield a Hl food grade grease.
- a vegetable derived formulation can be adjusted to meet an NLGI #2 grease by using natural soybean oil, for example, rendering the resulting grease biodegradable.
- the grease can be categorized as biobased and biodegradable when the grease is made from vegetable-derived oleic acid and a let down oil consisting of a vegetable-derived oil such as canola or palm oil.
- an optional antioxidant additive may be used to improve the oxidative resistance of the complex grease.
- an aminic antioxidant may be utilized in preparing the overbased complex grease.
- the aminic antioxidant may be added in an amount of typically less than 1.0% by weight of the total complex grease formulation. In yet another example, the aminic antioxidant may be added in an amount of about 0.5% by weight of the total complex grease formulation.
- vaterite containing complex grease as described herein will carry out the objects set forth hereinabove. It is, therefore, to be understood that any variations evident fall within the scope of the claimed invention and thus, the selection of specific component elements can be determined without departing from the spirit of the invention herein disclosed and described.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9459808P | 2008-09-05 | 2008-09-05 | |
PCT/US2009/041378 WO2010027532A1 (en) | 2008-09-05 | 2009-04-22 | Overbased metal carboxylate complex grease and process for making |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2344612A1 true EP2344612A1 (en) | 2011-07-20 |
EP2344612A4 EP2344612A4 (en) | 2012-08-29 |
Family
ID=41797394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09811873A Withdrawn EP2344612A4 (en) | 2008-09-05 | 2009-04-22 | Overbased metal carboxylate complex grease and process for making |
Country Status (9)
Country | Link |
---|---|
US (1) | US20110092404A1 (en) |
EP (1) | EP2344612A4 (en) |
JP (1) | JP2012502139A (en) |
KR (1) | KR20110059561A (en) |
CN (1) | CN102015983A (en) |
CA (1) | CA2722005A1 (en) |
MX (1) | MX2010011509A (en) |
RU (1) | RU2010142947A (en) |
WO (1) | WO2010027532A1 (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9976102B2 (en) | 2011-10-31 | 2018-05-22 | Nch Corporation | Composition and method of manufacturing calcium sulfonate greases using alkali metal hydroxide and delayed addition of non-aqueous converting agents |
US9273265B2 (en) * | 2011-10-31 | 2016-03-01 | Nch Corporation | Calcium carbonate based sulfonate grease compositions and method of manufacture |
US9976101B2 (en) | 2011-10-31 | 2018-05-22 | Nch Corporation | Method of manufacturing calcium sulfonate greases using delayed addition of non-aqueous converting agents |
US9458406B2 (en) | 2011-10-31 | 2016-10-04 | Nch Corporation | Calcium hydroxyapatite based sulfonate grease compositions and method of manufacture |
CN104560282B (en) * | 2013-10-25 | 2017-03-01 | 中国石油化工股份有限公司 | Sulfonate, its preparation method and comprise grease of this sulfonate and preparation method thereof |
FR3013056B1 (en) * | 2013-11-13 | 2018-01-19 | Total Marketing Services | PROCESS FOR THE PREPARATION OF A COMPLEX CALCIUM SULFONATE GREASE |
US10519393B2 (en) | 2016-05-18 | 2019-12-31 | Nch Corporation | Composition and method of manufacturing calcium magnesium sulfonate greases |
US10087388B2 (en) | 2016-05-18 | 2018-10-02 | Nch Corporation | Composition and method of manufacturing calcium sulfonate and calcium magnesium sulfonate greases using a delay after addition of facilitating acid |
US10392577B2 (en) | 2016-05-18 | 2019-08-27 | Nch Corporation | Composition and method of manufacturing overbased sulfonate modified lithium carboxylate grease |
US10087387B2 (en) | 2016-05-18 | 2018-10-02 | Nch Corporation | Composition and method of manufacturing calcium magnesium sulfonate greases |
US10087391B2 (en) | 2016-05-18 | 2018-10-02 | Nch Corporation | Composition and method of manufacturing calcium magnesium sulfonate greases without a conventional non-aqueous converting agent |
DE102016125289A1 (en) * | 2016-12-21 | 2018-06-21 | Fuchs Petrolub Se | Use of calcium complex and calcium sulfonate complex greases for wire rope lubrication |
US11078438B2 (en) * | 2017-07-24 | 2021-08-03 | Chemtool Incorporated | Extreme pressure metal sulfonate grease |
US11661563B2 (en) | 2020-02-11 | 2023-05-30 | Nch Corporation | Composition and method of manufacturing and using extremely rheopectic sulfonate-based greases |
CN114806688A (en) * | 2022-04-25 | 2022-07-29 | 宝鸡文理学院 | Composite calcium sulfonate-based lubricating grease for industrial robot and preparation method thereof |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6063742A (en) * | 1999-03-01 | 2000-05-16 | The Lubrizol Corporation | Grease compositions |
US20040063589A1 (en) * | 2001-05-18 | 2004-04-01 | Omg Americas, Inc. | Lubricant compositions containing an overbased amorphous alkaline earth metal salt as a metal protectant |
US20080274923A1 (en) * | 2007-05-01 | 2008-11-06 | Omg Americas, Inc. | Overbased metal carboxylate calcite-containing greases |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3466245A (en) * | 1967-07-31 | 1969-09-09 | Gulf Research Development Co | Method of preparing calcium soap-calcium salt greases |
CA949055A (en) * | 1968-05-08 | 1974-06-11 | Continental Oil Company | Method for preparing highly basic grease and rust inhibiting compositions |
US4253976A (en) * | 1979-02-21 | 1981-03-03 | The Lubrizol Corporation | Magnesium oxide-carboxylate complexes, method for their preparation, and compositions containing the same |
US5919741A (en) * | 1998-01-20 | 1999-07-06 | The Lubrizol Corporation | Overbased carboxylate gels |
US6100226A (en) * | 1998-05-20 | 2000-08-08 | The Lubrizol Corporation | Simple metal grease compositions |
JP3948642B2 (en) * | 1998-08-21 | 2007-07-25 | 信越化学工業株式会社 | Thermally conductive grease composition and semiconductor device using the same |
JP2000169873A (en) * | 1998-12-02 | 2000-06-20 | Shin Etsu Chem Co Ltd | Silicone grease composition |
US6495494B1 (en) * | 2000-06-16 | 2002-12-17 | Ecolab Inc. | Conveyor lubricant and method for transporting articles on a conveyor system |
CN1126807C (en) * | 2000-07-19 | 2003-11-05 | 中国石油天然气股份有限公司兰州炼化分公司 | Process for preparing ultrahigh-basicity composite metal detergent |
EP1644310A2 (en) * | 2003-07-11 | 2006-04-12 | Akzo Nobel N.V. | Highly over-based light colored liquid alkaline earth metal carboxylate |
US7407920B2 (en) * | 2004-07-29 | 2008-08-05 | Crompton Corporation | Overbased calcium salicylate greases |
US7422999B2 (en) * | 2005-02-14 | 2008-09-09 | The Lubrizol Corporation | Overbased vaterite containing salt composition |
CN101153239B (en) * | 2007-08-27 | 2010-12-01 | 无锡市高润杰化学有限公司 | Method for producing compound sulphonic acid albany grease |
US20090264327A1 (en) * | 2008-04-21 | 2009-10-22 | Omg Americas, Inc. | Overbased metal carboxylate precursor and process for making |
DE102008034959A1 (en) * | 2008-07-25 | 2010-01-28 | Fuchs Petrolub Ag | Calcium / lithium complex fats and encapsulated constant velocity joint containing these and their application |
-
2009
- 2009-04-22 JP JP2011526071A patent/JP2012502139A/en active Pending
- 2009-04-22 CN CN2009801140092A patent/CN102015983A/en active Pending
- 2009-04-22 EP EP09811873A patent/EP2344612A4/en not_active Withdrawn
- 2009-04-22 CA CA2722005A patent/CA2722005A1/en not_active Abandoned
- 2009-04-22 MX MX2010011509A patent/MX2010011509A/en unknown
- 2009-04-22 US US12/995,680 patent/US20110092404A1/en not_active Abandoned
- 2009-04-22 RU RU2010142947/04A patent/RU2010142947A/en not_active Application Discontinuation
- 2009-04-22 WO PCT/US2009/041378 patent/WO2010027532A1/en active Application Filing
- 2009-04-22 KR KR1020107019934A patent/KR20110059561A/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6063742A (en) * | 1999-03-01 | 2000-05-16 | The Lubrizol Corporation | Grease compositions |
US20040063589A1 (en) * | 2001-05-18 | 2004-04-01 | Omg Americas, Inc. | Lubricant compositions containing an overbased amorphous alkaline earth metal salt as a metal protectant |
US20080274923A1 (en) * | 2007-05-01 | 2008-11-06 | Omg Americas, Inc. | Overbased metal carboxylate calcite-containing greases |
Non-Patent Citations (1)
Title |
---|
See also references of WO2010027532A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR20110059561A (en) | 2011-06-02 |
CN102015983A (en) | 2011-04-13 |
RU2010142947A (en) | 2012-04-27 |
WO2010027532A1 (en) | 2010-03-11 |
MX2010011509A (en) | 2011-03-04 |
US20110092404A1 (en) | 2011-04-21 |
JP2012502139A (en) | 2012-01-26 |
EP2344612A4 (en) | 2012-08-29 |
CA2722005A1 (en) | 2010-03-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20110092404A1 (en) | Overbased metal carboxylate complex grease and process for making | |
JP4829886B2 (en) | Overbased calcium salicylate grease | |
JP6013497B2 (en) | Calcium carbonate-based calcium sulfonate grease composition and production method | |
US9976102B2 (en) | Composition and method of manufacturing calcium sulfonate greases using alkali metal hydroxide and delayed addition of non-aqueous converting agents | |
US20160369198A1 (en) | Calcium Hydroxyapatite Based Calcium Sulfonate Grease Compositions and Method of Manufacture | |
CN108473910B (en) | Calcium sulfonate grease production using alkali metal hydroxide and delayed addition of non-aqueous conversion agent | |
US20080274923A1 (en) | Overbased metal carboxylate calcite-containing greases | |
CN109153936B (en) | Composition and method for preparing calcium magnesium sulfonate lubricating grease without using conventional non-aqueous conversion agent | |
US20090264327A1 (en) | Overbased metal carboxylate precursor and process for making | |
CN108463542B (en) | Method for preparing calcium sulfonate grease by using non-aqueous conversion agent with delayed addition | |
CN109153938B (en) | Compositions and methods for preparing calcium and calcium magnesium sulfonate greases using a delay after addition of a promoting acid | |
AU2019383363A1 (en) | Composition and method of manufacturing sulfonate-based greases using a glycerol derivative | |
WO2021163185A1 (en) | Composition and method of manufacturing and using extremely rheopectic sulfonate-based greases |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20110405 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA RS |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: HOPKINS, MARY, E. Inventor name: FORD, JOSHUA, I. Inventor name: ZHANG, RUIMING |
|
DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20120726 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C10M 125/14 20060101ALI20120720BHEP Ipc: C10M 169/04 20060101AFI20120720BHEP Ipc: C10M 125/10 20060101ALI20120720BHEP Ipc: C10N 40/20 20060101ALI20120720BHEP Ipc: C10M 105/22 20060101ALI20120720BHEP Ipc: C10N 50/10 20060101ALI20120720BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20121101 |