| Patent Number |
Title Of Patent |
Date Issued |
| 5203918 |
Method for forming aggregated kaolin pigment |
April 20, 1993 |
| A method for forming an aggregated kaolin clay pigment, comprising: preparing an aqueous 6-30% solids slurry of a fine particle size feed kaolin; intermixing with said slurry from about 10 to 20% of alum, by weight of the dry kaolin; adding to the mix of step (b) from about 15 to 30% |
| 5171725 |
Method for preparing aqueous mineral suspensions |
December 15, 1992 |
| An improvement is disclosed applicable to systems where a mineral ore, such as a crude kaolin is introduced into a high shear, high energy mixing device with a suspending fluid and dispersing agents added to the same mixing device at controlled rates to produce a suspension with a solid |
| 5164006 |
Method for preparing acid resistant calcium carbonate pigments |
November 17, 1992 |
| A method for preparing an acid resistant calcium carbonate pigment. An aqueous slurry of particulate calcium carbonate is provided at a pH of from about 11.0 to 12.0 and having from 2 to 5 g/l of excess calcium hydroxide. The slurry temperature is brought to the range of about 75.deg |
| 5151124 |
Method for forming aggregated kaolin pigment |
September 29, 1992 |
| A method for forming a hydrothermally aggregated kaolin clay pigment, comprising: preparing an aqueous slurry of a particulate kaolin clay, sodium silicate, and finely divided calcium carbonate, having a total solids concentration of from about 10 to 20% by weight; the non-aqueous co |
| 5137574 |
Method for producing high opacifying kaolin pigment |
August 11, 1992 |
| A method of producing a high opacifying kaolin pigment by separating from one or more iron-stained titania-containing crude kaolins having a titania content of from about 1 to 2 weight percent, one or more titania-enriched kaolin fractions which contain the titania in an amount of above |
| 5129953 |
Method for improving bulk density and flowability of calcined kaolin clay products |
July 14, 1992 |
| The bulk handling characteristics of a calcined kaolin clay powder, including the bulk density and flowability, are significantly improved by forming an aqueous slurry of the calcined kaolin clay powder and spray drying the slurry. |
| 5098583 |
Method for producing high solids slurries of clay water products |
March 24, 1992 |
| In the process for beneficiating a crude kaolin by the method which includes a wet classification step to provide a classified kaolin fraction having a PSD such that at least 50% by weight thereof are of less than 1/2.mu.m ESD and substantially 100% by weight are of less than 10 .mu.m |
| 5074475 |
Method for improving bulk density and flowability of calcined kaolin clay products |
December 24, 1991 |
| The bulk handling characteristics of a calcined kaolin clay powder, including the bulk density and flowability, are significantly improved by forming an aqueous slurry of the calcined kaolin clay powder and spray drying the slurry. |
| 5068276 |
Chemically aggregated mineral pigments |
November 26, 1991 |
| A method is described for forming bulked aggregates of mineral particles such as kaolins. An aqueous slurry of the mineral is treated with a source of a multi-valent cation to floc the mineral, polyacrylic is added and the slurry is then neutralized with a base to an alkaline pH. This tr |
| 5047375 |
Method for producing high opacifying kaolin pigment |
September 10, 1991 |
| A method of producing a high opacity paper filler pigment which comprises subjecting an iron-stained titania-containing kaolin to beneficiation by froth flotation or high intensity magnetic separation; recovering the froth or magnet rejects, dewatering and drying the rejects to produce a |
| 5028268 |
Method for improving the rheology of calcined kaolin clay products |
July 2, 1991 |
| The rheology of an aqueous slurry of a calcined kaolin clay powder is significantly improved by spray drying a slurry of the calcined kaolin clay powder, recovering the spray-dried material, and forming an aqueous slurry from said spray-dried material. |
| 5022924 |
Method for reducing the abrasion of calcined clay |
June 11, 1991 |
| A method is provided for reducing the abrasiveness of calcined clay, e.g., kaolin clay. The method comprises intermixing the clay prior to calcination with a finely-divided silica, preferably in the form of colloidal or fumed silica, in an amount sufficient to reduce the abrasiveness |
| 4997550 |
Method for improved flotation of discoloring impurities from kaolinite |
March 5, 1991 |
| Flotation of a kaolin clay slurry to remove titanium-based impurities is improved by adding a biocide to the slurry prior to the flotation and effecting the flotation in the presence of the biocide. The addition of the biocide improves the efficacy of flotation and thereby increases the |
| 4987011 |
Method for producing a silicon carbide coated clay |
January 22, 1991 |
| A layered lattice silicate in particulate form, such as kaolin, which contains naturally occurring organic material useful as a source of carbon or which contains an external source of carbon, is treated at elevated temperature in a hydrogen atmosphere to cause formation of silicon carbi |
| 4976786 |
Method for forming aggregated kaolin pigment |
December 11, 1990 |
| A method for forming a hydrothermally aggregated kaolin clay pigment, comprising preparing an aqueous slurry of particulate kaolin clay and sodium aluminate, having a total solids concentration of from about 2 to 25% by weight, the weight ratio between kaolin and aluminate being greater |
| 4971629 |
Method of preparing aggregated pigments from clays |
November 20, 1990 |
| Aggregation of kaolin particles by wet processing using a hydrothermal technique is described. Calcined clay is first digested in a solution containing NaOH and the obtained sodium silicate solution is separated. Aggregation of uncalcined clay particles by hydrothermal treatment is then |
| 4962279 |
Kaolin calciner waste heat and feed recovery process |
October 9, 1990 |
| An improvement is disclosed applicable to the production of calcined and hydrous kaolins in particulate form. A process and system are disclosed in which the calciner is integrated with a filtration process and a preceding spray dryer by passing the dust-laden calciner hot off-gases to t |
| 4960816 |
Surface modified mineral compositions |
October 2, 1990 |
| A mineral particulate is disclosed selected from the group consisting of metal carbonates, glass fibers and layered lattice silicates, comprising particles of said mineral, the surface of which have been modified by a polymer synthesized in situ in the presence of a reactive gas selected |
| 4935062 |
Kaolinite aggregation using organo-silicon compounds |
June 19, 1990 |
| A particulate kaolin pigment which enhances gloss and printability properties when used as a coating pigment for paper and enhances light scattering and opacifying properties when incorporated as a filler in paper, is obtained by mixing a fine particle kaolin with an aggregating agen |
| 4916094 |
Method for producing high solids kaolin slurry |
April 10, 1990 |
| A bleached, dispersed, high solids slurry is produced from unprocessed crudes at low pH and with minimum work input, using polyacrylic acid as the dispersant. The process involves making the slurry at the highest solids possible without resorting to filtration or spray drying. |
| 4911982 |
Surface treated layered lattice silicates and resultant products |
March 27, 1990 |
| A surface treated clay such as kaolin is prepared by a process in which the clay surface is preconditioned by treatment with gaseous hydrogen and then functionalized by reaction with a polymerizable organic moiety of an organic compound. The products are useful as fillers for rubber, res |
| 4906300 |
Solid state reactions with MgCO.sub.3 /MgOH |
March 6, 1990 |
| In the method for producing a low abrasion calcined kaolin clay pigment by providing a feed kaolin which is at least sufficiently fine that substantially 100% by weight of the particles are of less than 1 micrometer E.S.D., and heating said feed in a calciner to a temperature of at l |
| 4900767 |
Process for the surface modification of minerals in a reactive atmosphere |
February 13, 1990 |
| A method of producing a mineral such as calcium carbonate, glass fibers and layered lattice silicates which is surface modified with an organic material wherein said mineral in substantially dry, particulate form is contacted with an organic monomer, co-monomers or a prepolymer, and |
| 4859718 |
Method for surface treating metal carbonate |
August 22, 1989 |
| A method of producing a calcium carbonate, magnesium carbonate or calcium-magnesium carbonate which is surface modified with an organic material wherein the carbonate in substantially dry, particulate form is contacted with an organic monomer, copolymers or a prepolymer, and surface |
| 4855268 |
Mixed pillared clays |
August 8, 1989 |
| Mixed pillared clays having good thermal stabilities and high surface areas are prepared by liquid phase methods in which either (a) a discrete multi-metallic hydroxy polymer having a definite chemical formula is prepared prior to mixing with a swelling clay or (b) at least two separate |
| 4851048 |
Structured kaolin pigment and process for manufacture thereof |
July 25, 1989 |
| A structured kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler in paper. The pigment is also useful in paper coating applications. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The |
| 4849006 |
Controlled release composition and method |
July 18, 1989 |
| A controlled release composition is prepared by contacting an organoclay with a biologically active material in concentrated form to cause absorption of the active material on the organoclay. The resulting product releases the active agent slowly, over a period of time, when exposed to |
| 4830673 |
Method for reducing the abrasion of calcined clay |
May 16, 1989 |
| A method is provided for reducing the abrasiveness of calcined clay, e.g. kaolin clay. The method comprises contacting the clay prior to calcination with an aliphatic diol, preferably ethylene glycol, in an amount sufficient to reduce the abrasiveness of the calcined product. |
| 4826536 |
Structured kaolin pigments |
May 2, 1989 |
| The invention relates to a structured kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler or coating pigment in paper. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be |
| 4820554 |
Coated paper and process |
April 11, 1989 |
| A coated paper of improved optical and printing qualities, coated with a structured kaolinitic pigment. The pigment consists of porous aggregates of kaolin particles which are chemically bonded together. The pigment may be produced by chemically reacting a particulate kaolin with a metal |
| 4818294 |
Kaolinite aggregation using organo-silicon compounds |
April 4, 1989 |
| A particulate kaolin pigment which enhances gloss and printability properties when used as a coating pigment for paper and enhances light scattering and opacifying properties when incorporated as a filler in paper, is obtained by mixing a fine particle kaolin with an aggregating agen |
| 4816074 |
Kaolinite aggregation using sodium silicate |
March 28, 1989 |
| A process is described in which a structured aggregated kaolin pigment is prepared by mixing substantially dry kaolin in particulate form with an aqueous alkali metal silicate to deposit on the surface of the kaolin particles a substantially molecular level of said silicate without f |
| 4810580 |
Silicon nitride coated clays and method of preparation |
March 7, 1989 |
| A modified clay mineral, such as a kaolin clay, is disclosed in which nitridation of the silicon atoms of the clay has been effected. This may be accomplished by reaction of the clay with NH.sub.3 at temperatures above 1000.degree. C. |
| 4810578 |
Surface modified pigments and methods for producing same and elastomers containing same |
March 7, 1989 |
| The surface of a hydrous clay such as kaolin is modified by treatment with an alkyl dimethoxy mercaptopropylsilane and the modified clay is used as a filler in elastomers to give improved reinforcement. |
| 4806167 |
Kaolin aggregation using combination of organic and inorganic bases |
February 21, 1989 |
| The invention relates to an aggregated kaolinitic pigment having improved physical and optical characteristics when incorporated as a filler or coating pigment in paper. The pigment may be produced by treating a particulate kaolin with an alkaline earth metal carbonate or hydroxide or |
| 4804527 |
Method and composition for safely decomposing hydrazine |
February 14, 1989 |
| A hypergol spill, e.g., hydrazine, is safely rendered harmless by contacting it with a composition comprising cupric oxide on a porous support. Neutralization is achieved by drawing the hydrazine into the pellet pores where a reduction reaction of cupric oxide takes place. The critic |
| 4798766 |
Surface modified clays and process of manufacture |
January 17, 1989 |
| A method is described in which a layered lattice silicate is surface modified with an organic material by reacting said layered lattice silicate in particulate form with a reactant system comprising gaseous NH.sub.3 at temperatures below about 1000.degree. C. and contacting the amina |
| 4798630 |
Process for surface treating clay minerals and reactive intermediates produced by said process |
January 17, 1989 |
| A method for chlorinating a clay mineral starting composition to produce reactive chloride intermediates, comprising: reacting said composition in substantially dry particulate form with gaseous SiCl.sub.4 to activate the surface of said composition, thereby forming said reactive chlorid |
| 4789595 |
Process for surface treating layered lattice silicates and resultant products |
December 6, 1988 |
| A method for chlorinating the surface of a layered lattice silicate to produce a reactive chloride intermediate. The layered lattice silicate is reacted in substantially dry particulate form with a reactant system capable of forming bound chloride moieties at its surface, to form the |
| 4789403 |
Surface modified layered lattice silicate pigments |
December 6, 1988 |
| A method of producing a layered lattice silicate which is surface modified with an organic material wherein said silicate in substantially dry, particulate form is contacted with an organic monomer, co-monomers or a prepolymer, and surface polymerization or reaction in situ on the silica |
| 4764495 |
Process for surface treating layered lattice silicates and resultant products |
August 16, 1988 |
| A surface treated clay such as kaolin is prepared by a process in which the clay surface is preconditioned by treatment with gaseous hydrogen and then functionalized by reaction with a polymerizable organic moiety of an organic compound. The products are useful as fillers for rubber, res |
| 4717559 |
Kaolin calciner waste heat and feed recovery system and method |
January 5, 1988 |
| An improvement is disclosed applicable to the production of calcined, anhydrous kaolins in particulate form. A process and system are disclosed in which the calciner is integrated with a preceding spray drier by cycling the dust-laden calciner hot off-gases to the spray drier to achi |
| 4693427 |
Method for improving handleability of calcined kaolin clay products |
September 15, 1987 |
| A method for increasing the bulk density and decreasing the time of wetting with water of a substantially anhydrous kaolin clay powder, comprising dry milling said powder in a media mill wherein the media is at least +5 mesh, and using work inputs of from about 5 to about 40 HP-hrs/ton o |
| 4690868 |
Process for surface treating clay minerals and resultant products |
September 1, 1987 |
| Directly aminating the surface of a 2-dimensional layered lattice silicate comprising reacting the lattice silicate in particulate form with gaseous NH.sub.3 at temperatures below 100.degree. C. to form bound NH.sub.2 groups at the surface, the resulting modified 2-dimensional layered |
| 4678517 |
Method for calcining kaolin |
July 7, 1987 |
| A method for improving brightness in a calcined kaolin pigment while minimizing detrimental effects on abrasiveness. The kaolin calciner feed is intermixed with a particulate material which is oxidizable during calcining to provide a source of auxiliary thermal energy in the kaolin b |
| 4670993 |
Method for fluidizing fine kaolin particles |
June 9, 1987 |
| A fluidized bed apparatus is provided which comprises (a) a fluidized bed container having gaseous fluidization agent intake means and discharge means; (b) gaseous fluidization agent distributor means comprising a distributor-separator plate arranged intermediate said gaseous agent i |
