Patent application number | Description | Published |
20080280142 | Preparation of organic additive-treated, pyrogenic silica-encapsulated titanium dioxide particles - One aspect of the invention is to provide a composition comprising a titanium dioxide particle having on the surface of said particle a substantially encapsulating layer comprising a pyrogenically-deposited metal oxide; said substantially encapsulating layer having on its surface at least one organic surface treatment material selected from an organo-silane, an organo-siloxane, a fluoro-silane, an organo-phosphonate, an organo-acid phosphate, an organo-pyrophosphate, an organo-polyphosphate, an organo-metaphosphate, an organo-phosphinate, an organo-sulfonic compound, a hydrocarbon-based carboxylic acid, an associated ester of a hydrocarbon-based carboxylic acid, a derivative of a hydrocarbon-based carboxylic acid, a hydrocarbon-based amide, a low molecular weight hydrocarbon wax, a low molecular weight polyolefin, a co-polymer of a low molecular weight polyolefin, a hydrocarbon-based polyol, a derivative of a hydrocarbon-based polyol, an alkanolamine, a derivative of an alkanolamine, an organic dispersing agent, or a mixture thereof. Another aspect of the invention is to provide processes for producing said composition. | 11-13-2008 |
20080305363 | REDUCED ABRASION OF TITANIUM DIOXIDE PIGMENTS PRODUCED FROM THE CHLORIDE PROCESS - Disclosed herein are pigments comprising mostly rutile TiO | 12-11-2008 |
20100098621 | PROCESS FOR MAKING TITANIUM DIOXIDE - The disclosure relates to a process for making titanium dioxide, comprising: reacting titanium tetrachloride with oxygen by contacting the titanium tetrachloride with the oxygen in a vapor phase reactor under mixing conditions and at an elevated temperature to form a gaseous product stream containing titanium dioxide; separating the titanium dioxide from the gaseous product stream to form a process stream; analyzing the process stream to detect a concentration of titanium tetrachloride in the process stream; comparing the concentration of titanium tetrachloride detected in the process stream to an aim point concentration; and modifying the oxidation conditions to restore or maintain the concentration of titanium tetrachloride in the process stream at the aim point. In one embodiment, the process further comprises contacting the gaseous product stream with silicon tetrachloride under mixing conditions and at an elevated temperature to at least partially encapsulate the titanium dioxide with a silicon-containing compound and separating the at least partially encapsulated titanium dioxide from the gaseous product stream and analyzing the process stream to detect a concentration silicon tetrachloride for comparison to a silicon tetrachloride aim point concentration so that the conditions for silicon tetrachloride contacting can be modified to restore or maintain the concentration of silicon tetrachloride in the process stream. | 04-22-2010 |
20100196253 | PROCESS FOR PREPARING TITANIUM TETRACHLORIDE USING OFF GASES FROM A SILICA AND ZIRCON CARBO-CHLORINATION PROCESS - This disclosure relates to an improved process for preparing titanium tetrachloride comprising reacting ores comprising metal oxides with chlorine and a carbon compound at a temperature of about 900° C. to about 1300° C. to form the corresponding chlorides and off gas comprising carbon monoxide, wherein the metal in the metal oxide is selected from the group consisting of silicon, zircon and mixtures thereof, and wherein the carbon compound is selected from the group consisting of coke, charcoal, silicon carbide and mixtures thereof; and reacting titanium dioxide with a stream comprising off gases formed in the previous step to form titanium tetrachloride and carbon dioxide. | 08-05-2010 |
20100324186 | PREPARATION OF ORGANIC ADDITIVE-TREATED, PYROGENIC SILICA-ENCAPSULATED TITANIUM DIOXIDE PARTICLES - One aspect of the invention is to provide a composition comprising a titanium dioxide particle having on the surface of said particle a substantially encapsulating layer comprising a pyrogenically-deposited metal oxide; said substantially encapsulating layer having on its surface at least one organic surface treatment material selected from an organo-silane, an organo-siloxane, a fluoro-silane, an organo-phosphonate, an organo-acid phosphate, an organo-pyrophosphate, an organo-polyphosphate, an organo-metaphosphate, an organo-phosphinate, an organo-sulfonic compound, a hydrocarbon-based carboxylic acid, an associated ester of a hydrocarbon-based carboxylic acid, a derivative of a hydrocarbon-based carboxylic acid, a hydrocarbon-based amide, a low molecular weight hydrocarbon wax, a low molecular weight polyolefin, a co-polymer of a low molecular weight polyolefin, a hydrocarbon-based polyol, a derivative of a hydrocarbon-based polyol, an alkanolamine, a derivative of an alkanolamine, an organic dispersing agent, or a mixture thereof. Another aspect of the invention is to provide processes for producing said composition. | 12-23-2010 |
20110293508 | REDUCED ABRASION OF TITANIUM DIOXIDE PIGMENTS PRODUCED FROM THE CHLORIDE PROCESS - Disclosed herein are pigments comprising mostly rutile TiO | 12-01-2011 |
20120058044 | PROCESS OF USING AN IMPROVED FLUE IN A TITANIUM DIOXIDE PROCESS - This disclosure relates to a flue providing improved heat transfer comprising an inner layer and an outer layer, wherein the inner layer comprises a high thermal conductivity ceramic having a thermal conductivity of at least 91 W/m-K (@300K) and a Moh's hardness of at least 6.5, and comprises a plurality of protuberances | 03-08-2012 |
20120216711 | COATING COMPOSITION COMPRISING TUNGSTEN TREATED TITANIUM DIOXIDE HAVING IMPROVED PHOTOSTABILITY - This disclosure relates to a coating composition comprising an inorganic particle, wherein the inorganic particle comprises at least about 0.002% of tungsten, based on the total weight of the inorganic particle, and has a photostability ratio (PSR) of at least about 2, as measured by the Ag | 08-30-2012 |
20120216717 | TUNGSTEN CONTAINING INORGANIC PARTICLES WITH IMPROVED PHOTOSTABILITY - This disclosure relates to inorganic particles, typically inorganic metal oxide or mixed metal oxide particles, and more typically titanium dioxide (TiO | 08-30-2012 |
20120216976 | PAPER LAMINATES COMPRISING TUNGSTEN TREATED TITANIUM DIOXIDE HAVING IMPROVED PHOTOSTABILITY - This disclosure relates to a resin-impregnated, opaque, cellulose pulp-based sheet comprising an inorganic particle, wherein the inorganic particle comprises at least about 0.002% of tungsten, based on the total weight of the inorganic particle, and has a photostability ratio (PSR) of at least about 2, as measured by the Ag | 08-30-2012 |
20120219493 | PROCESS FOR IN-SITU FORMATION OF CHLORIDES IN THE PREPARATION OF TITANIUM DIOXIDE - This disclosure relates to a process for producing titanium dioxide, comprising: a) reacting an alloy comprising a metal selected from the group consisting of aluminum, titanium and mixtures thereof, wherein one metal is a major component of the alloy, and an element selected from the group consisting of Li, Be, B, Na, Mg, Al, P, S, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Rb, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, and Bi, with chlorine gas to form chlorides of aluminum, titanium or mixtures thereof and chlorides of the element selected from the group consisting of Li, Be, B, Na, Mg, Al, P, S, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Rb, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, and Bi, at or above the boiling point of the chloride of the major component of the alloy; with the proviso that the element does not comprise Ti when the metal is Ti and does not comprise Al when the metal is Al; (b) adding titanium tetrachloride to the chlorides formed in step (a); (c) oxidizing the chlorides formed in step (a), and titanium tetrachloride of step (b); and (d) forming titanium dioxide. | 08-30-2012 |
20120219494 | PROCESS FOR IN-SITU FORMATION OF CHLORIDES OF SILICON, ALUMINUM AND TITANIUM IN THE PREPARATION OF TIATANIUM DIOXIDE - This disclosure relates to a process for producing titanium dioxide, comprising: reacting aluminum and an alloy comprising silicon and titanium having a silicon content of at least 5%, based on the weight of the ahoy, with chlorine gas at temperatures above 190° C. to form chlorides of silicon, aluminum and titanium; adding titanium tetrachloride to the chlorides of silicon, aluminum and titanium; oxidizing the chlorides of silicon, aluminum and titanium and titanium tetrachloride; and forming titanium dioxide. | 08-30-2012 |
20120219743 | POLYMER COMPOSITION COMPRISING TUNGSTEN TREATED TITANIUM DIOXIDE HAVING IMPROVED PHOTOSTABILITY - This disclosure relates to a polymer composition comprising an inorganic particle, wherein the inorganic particle comprises at least about 0.002% of tungsten, based on the total weight of the inorganic particle, and has a photostability ratio (PSR) of at least about 2, as measured by the Ag | 08-30-2012 |
20120288437 | PROCESS FOR IN-SITU FORMATION OF CHLORIDES OF SILICON AND ALUMINUM IN THE PREPARATION OF TITANIUM DIOXIDE - This disclosure relates to a process for producing titanium dioxide, comprising: a) reacting a alloy comprising silicon and aluminum having a melting point of about 482° C. to about 660° C., with chlorine gas at temperatures above 190° C. to form chlorides of silicon and aluminum; b) adding titanium tetrachloride to the chlorides of silicon and aluminum of step (a); c) oxidizing the chlorides of silicon and aluminum and titanium tetrachloride of step (b); and d) forming titanium dioxide. | 11-15-2012 |
20130276671 | PROCESS FOR CONTROLLING PARTICLE SIZE AND SILICA COVERAGE IN THE PREPARATION OF TITANIUM DIOXIDE - The present disclosure relates to a vapor phase process for producing a substantially anatase-free titanium dioxide pigment comprising reacting a vaporous titanium dioxide precursor and an oxygen containing gas in a reactor; and introducing a mixture of liquid silicon halide and liquid titanium dioxide precursor into the reactor at a point downstream of the addition of the vaporous titanium dioxide precursor, and the oxygen containing gas, and at a process temperature of about 1200° C. to about 1600° C. to produce titanium dioxide particles that are substantially encapsulated in silicon dioxide. | 10-24-2013 |
20130284067 | PROCESS FOR CONTROLLING PARTICLE SIZE AND ADDITIVE COVERAGE IN THE PREPARATION OF TITANIUM DIOXIDE - The present disclosure relates to a vapor phase process for producing a substantially anatase-free titanium dioxide pigment comprising: reacting a vaporous titanium dioxide precursor and an oxygen containing gas in a reactor; and introducing a mixture of liquid titanium dioxide precursor and a liquid or finely divided solid compound comprising a element selected from the group consisting of Li, Be, B, Na, Mg, Al, P, 5, K, Ca, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Rb, Sr, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, In, Sn, Sb, Te, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, and Pb, into the reactor at a point downstream of the addition of the vaporous titanium dioxide precursor, and the oxygen containing gas, and at a process temperature of about 1200 ° C. to about 1600 CC to produce titanium dioxide particles that are coated by the oxide formed from the element. | 10-31-2013 |
20140102333 | TREATED INORGANIC PARTICLE - The disclosure provides a treated inorganic particle, in particular a titanium dioxide particle, having reduced photoactivity, lower acid solubility and improved anti-microbial properties comprising: an inorganic core particle, in particular a titanium dioxide particle; a first treatment of silica, wherein the silica is added in a single step; and a second treatment comprising co-precipitated zinc oxide and alumina. These particles have reduced photoactivity, lower acid solubility and improved anti-microbial properties. | 04-17-2014 |
20140121314 | TREATED INORGANIC PIGMENTS HAVING REDUCED PHOTOACTIVITY AND IMPROVED ANTI-MICROBIAL PROPERTIES AND THEIR USE IN POLYMER COMPOSITIONS - The disclosure provides a polymer composition comprising a treated inorganic particle having improved photostability and improved anti-microbial properties, wherein the treated inorganic particle comprises: a inorganic core particle; a first treatment of a silicon compound, wherein the silicon compound is added in a single step; and a second treatment comprising a co-precipitated zinc oxide and alumina. | 05-01-2014 |
20140134427 | TREATED INORGANIC PIGMENTS HAVING REDUCED PHOTOACTIVITY AND ANTI-MICROBIAL PROPERTIES AND THEIR USE IN PAPER SLURRIES - The disclosure provides a paper slurry comprising a treated inorganic particle having reduced photoactivity and improved anti-microbial properties, wherein the treated inorganic pigment comprises: an inorganic core particle; a first treatment of a silicon compound, wherein the silicon compound is added in a single step; and a second treatment comprising a co-precipitated zinc oxide and alumina. | 05-15-2014 |
20140135421 | TREATED INORGANIC PIGMENTS HAVING REDUCED PHOTOACTIVITY AND IMPROVED ANTI-MICROBIAL PROPERTIES AND THEIR USE IN COATING COMPOSITIONS - The disclosure provides a coating composition comprising a treated inorganic particle having reduced photoactivity and improved anti-microbial properties, wherein the treated inorganic particle comprises: an inorganic core particle; a first treatment of a silicon compound, wherein the silicon compound is added in a single step; and a second treatment comprising co-precipitated zinc oxide and alumina. | 05-15-2014 |
20140154167 | PROCESS FOR PREPARING TITANIUM TETRACHLORIDE USING OFF GASES FROM A SILICA AND ZIRCON CARBO-CHLORINATION PROCESS - This disclosure relates to an improved process for preparing titanium tetrachloride comprising a first carbo-chlorination reaction comprising reacting ores comprising silica and/or zirconium with chlorine and a carbon compound at a temperature of about 900° C. to about 1300° C. to form an unscrubbed off gas comprising carbon monoxide, and using the unscrubbed off gas in a second carbo-chlorination reaction comprising titanium to form titanium tetrachloride. | 06-05-2014 |