Patents by Inventor John L. Burba, III
John L. Burba, III has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5232627Abstract: Adducts of clay, especially of the smectite variety, most especially bentonite, are prepared with an effective amount of at least one activated mixed metal oxide or oxy-hydroxide (AHMMO) formed by dehydrating hydrotalcite or a mixture comprising magnesium oxide and aluminum oxide, or a crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.a) (A.sup.n).sub.a. xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n, where n is 1 or more, (m+2d+3+n.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration. These adducts are useful, e.g., in drilling muds and in viscosity modification of a wide variety of fluids.Type: GrantFiled: April 16, 1991Date of Patent: August 3, 1993Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Arthur E. Read, Jr., Edgar F. Hoy
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Patent number: 5196143Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sup.n.sub.a.H.sub.2 O, where x is zero or more representing excess water of hydration, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.Type: GrantFiled: May 10, 1991Date of Patent: March 23, 1993Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Audrey L. Barnes
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Patent number: 5154932Abstract: Formulations or products are caused to be active antimicrobials by the addition thereto of at least one effective amount of at least one crystalline mixed metal hydroxide (MMOH) conforming substantially to the formulaLi.sub.m D.sub.d T(OH) (m+2d+3+na) (A.sup.n).sub.a.xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical, (m+2d+3+na) is equal or to greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration. The MMOH forms an adduct with, an coats, the microbes, thereby deactivating the microbes.Type: GrantFiled: September 4, 1990Date of Patent: October 13, 1992Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, John L. Alexander, Arthur E. Read, Jr., Wilfred W. Wilson
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Patent number: 5094778Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.J.sup.n where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.Type: GrantFiled: May 16, 1990Date of Patent: March 10, 1992Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Audrey L. Barnes
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Patent number: 5084209Abstract: Crystalline layered mixed metal hydroxides (LMMHs) which are substantially free of unbound water and which conform substantially to the general formulaLi.sub.m D.sub.d T(OH).sub.(3+m+d),wherem represents an amount of Li of from 0 to 3,D represents a divalent metal cation, and d represents an amount of D of from 0 to 8.0,T represents a trivalent metal cation, and (3+m+d) represents an amount which substantially satisfies the valence requirements of Li, D and T, andwhere m+d does not equal zero,are prepared, in an organic reaction medium which is essentially free of unbound water, by mixing predetermined metal organo compounds in predetermined ratios and reacting the metal organo compounds with at least one reagent which supplies OH.sup.- ions to replace the beginning anions in the mixture of metal compounds.A preferred LMMH is one which conforms substantially to the generic formula Mg.sub.d Al(OH).sub.(3+d), where d represents the amount of Mg per each unit of Al.Type: GrantFiled: November 6, 1990Date of Patent: January 28, 1992Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Steve A. Sims, Thomas M. Knobel
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Patent number: 5015409Abstract: Aqueous-based functional products or corrosive products such as cleansers, household products, commercial products, and personal care products are thickened or viscosity-modified by the addition of at least a small, but effective, amount of at least one crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.a) A.sub.a.sup.n.xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radial of valence n, where n is 1 or more, (m+2d+3+n.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration.Type: GrantFiled: March 11, 1988Date of Patent: May 14, 1991Assignee: The Dow Chemical CompanyInventors: Arthur E. Read, Jr., John L. Burba, III, Peter A. Doty, Clarence R. Crabb
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Patent number: 4990268Abstract: Novel monodispersed crystalline mixed metal layered hydroxide compounds of the general formula are prepared:Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where m is an amount from zero to 1; D is a divalent metal; d is the amount of D ions of from zero to 4; T is a trivalent metal; A represents anions or negative-valence radicals of valence n; na is from zero to -3; (m+d) is greater than zero; and (m+2d+3+na) is equal to or greater than 3. The D metal is preferably Mg and the T metal is preferably Al. These compounds are useful as gelling agents which impart beneficial thixotropic properties to various fluids, such as drilling fluids, especially when employed along with fluid loss agents.Type: GrantFiled: June 9, 1987Date of Patent: February 5, 1991Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Greene W. Strother
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Patent number: 4910246Abstract: Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.Type: GrantFiled: November 23, 1987Date of Patent: March 20, 1990Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, William C. Bauman
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Patent number: 4812245Abstract: Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.Type: GrantFiled: April 14, 1986Date of Patent: March 14, 1989Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, William C. Bauman
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Patent number: 4790954Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.Type: GrantFiled: May 7, 1987Date of Patent: December 13, 1988Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Audrey L. Barnes
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Patent number: 4748139Abstract: A method of producing layered structures of metal hydroxides (one or more metals) free of chloride or chlorine is disclosed. A specific ratio layered structure hydroxide is obtained from mixing first and second metals (respectively in the form of hydroxide, oxyhydroxide carbonate or nitrate as to the first metal and a hydroxide or alkali metal oxide as to the second) in proportions yielding a precipitated layered structure. The precipitators metal hydroxides with any excess of metal over 1:1 forming a segregated phase. Processing involves mixing, maintaining as a suspension up to about 48 hours at temperatures above about 40.degree. C. followed by cooling to recover the precipitate.Type: GrantFiled: June 2, 1986Date of Patent: May 31, 1988Assignee: The Dow Chemical CompanyInventor: John L. Burba, III
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Patent number: 4727167Abstract: Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.Type: GrantFiled: April 14, 1986Date of Patent: February 23, 1988Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, William C. Bauman
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Patent number: 4664843Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.Type: GrantFiled: July 5, 1985Date of Patent: May 12, 1987Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Audrey L. Barnes
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Patent number: 4594335Abstract: Crystalline transition metal aluminate compounds are formed by reacting transition metal compounds with crystalline hydrous alumina, such as gibbsite, bayerite, norstrandite, boehmite and the like. The crystalline hydrous alumina may be unsupported by a solid substrate or may be supported on a solid substrate or within the pores of a solid substrate, such as a macroporous resin.Type: GrantFiled: May 11, 1984Date of Patent: June 10, 1986Assignee: The Dow Chemical CompanyInventors: John L. Burba, III, Richard A. Wolcott
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Patent number: 4540509Abstract: Ion exchange resins in the base form, e.g., DOWEX MWA--1--OH ion exchange resin, which contain crystalline Al(OH).sub.3, e.g., gibbsite, and/or bayerite, and/or norstrandite, are treated with hot, concentrated LiX solutions (where X is anion) to prepare 3-layer crystalline LiX.2Al(OH).sub.3.nH.sub.2 O in the resin.Type: GrantFiled: August 30, 1982Date of Patent: September 10, 1985Assignee: The Dow Chemical CompanyInventor: John L. Burba, III
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Patent number: 4511710Abstract: Unwanted halogen values are removed from liquid resin, organic or hydrocarbon material by adding particulate crystalline lithium aluminate compounds to the liquid material to act as a halogen scavenger, then separating the crystalline aluminate compound from the liquid material.Type: GrantFiled: June 11, 1984Date of Patent: April 16, 1985Assignee: The Dow Chemical CompanyInventors: Chun S. Wang, Kyle B. Benkendorfer, John L. Burba, III
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Patent number: 4477367Abstract: Crystalline 2-layer LiOH.2Al(OH).sub.3.nH.sub.2 O, preferably supported by a porous substrate, is prepared by treating crystalline 2-layer LiX.2Al(OH).sub.3.nH.sub.2 O, where X is anion, with a LiOH solution or other hydroxide ion source. The so-formed crystalline 2-layer LiOH.2Al(OH).sub.3.nH.sub.2 O is particularly suitable for exchange of the OH ion with larger X' ions to produce other crystalline 2-layer LiX'.2Al(OH).sub.3.nH.sub.2 O.Type: GrantFiled: August 30, 1982Date of Patent: October 16, 1984Assignee: The Dow Chemical CompanyInventor: John L. Burba, III
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Patent number: 4477597Abstract: Macroporous ion exchange resins having increased apparent density are provided by incorporating into said resins a weighting agent which is of greater apparent density than the resin itself. Such weighted resins exhibit reduced bed expansion when used with upflow streams, with relatively dense liquids, and with relatively viscous liquids.Type: GrantFiled: October 2, 1981Date of Patent: October 16, 1984Assignee: The Dow Chemical CompanyInventors: John M. Lee, William C. Bauman, Richard A. Wolcott, John L. Burba, III
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Patent number: 4472362Abstract: Crystalline 2-layer lithium aluminate, especially when carried in an ion exchange resin, is regenerated for use as an extractor for Li.sup.+ values in aqueous solution, said regeneration being done by using an aqueous wash containing at least about 800 ppm Li.sup.+ ion.Type: GrantFiled: August 30, 1982Date of Patent: September 18, 1984Assignee: The Dow Chemical CompanyInventor: John L. Burba, III
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Patent number: 4464348Abstract: Cobalt values are extracted from Co-containing ores or minerals by using an aqueous solution containing a reducing agent (e.g., hydrazine hydrosulfate). The leachant substantially rejects nickel values, thus cobalt is extracted which is substantially free of nickel.Type: GrantFiled: January 10, 1983Date of Patent: August 7, 1984Assignee: The Dow Chemical CompanyInventor: John L. Burba, III