Abstract: The invention relates to a method for the preparation of particulate pigmentary titanium dioxide. The method comprises reacting, in solution, a precursor titanium tetrahalide with sulfuric acid to produce an intermediate titanyl sulfate product. Following crystallization and recovery of this intermediate product from solution the crystallized intermediate is redissolved in an aqueous solvent medium and hydrolyzed at elevated temperatures to provide a particulate amorphous titanium dioxide intermediate product. After separation from the aqueous solvent medium, this intermediate product then is subjected to calcination at elevated temperatures to produce the desired particulate titanium dioxide end product.

Abstract: The present invention relates to electrically conductive pigmentary composites comprised of electrically nonconductive pigmentary metal oxide substrates to which is adhered an electrically conductive polymer material.

Abstract: The present invention is directed to a process for preparing free flowing powders of nonpigmentary titanium dioxide granular aggregates. The process comprises the providing of dried preforms of flocculated pigmentary titanium dioxide and the comminution thereof to powders of granular aggregates of enhanced bulk density and predetermined particle size.

Abstract: A solvent extraction process for separating a heavy hydrocarbon feedstock material into its various component parts. The process comprises the utilization of pressure reduction to enhance the separation and recovery of a deasphalted oil product comprising substantially the lower molecular weight hydrocarbon components present in the original heavy hydrocarbon feedstock material.

Abstract: Ultraviolet light stable polymeric resin compositions comprising an ultraviolet light degradable polymeric resin component and an effective ultraviolet light absorbing amount of a particulate metal titanate component.

Abstract: A titanium dioxide pigment slurry containing from about 70 to about 80 percent by weight solids content is provided by dewatering, at superatmospheric pressure, a highly dispersed pigment slurry containing from about 20 to about 50 percent by weight of an untreated, nonflocculated titanium dioxide pigment and which slurry has a pH of below about 4.0 or above about 8.0 to produce a wet filter cake. The wet filter cake is reslurried in the presence of a dispersing agent. The high solids content slurry preferably is prepared from rutile titanium dioxide pigment.

Abstract: There is provided a process for improving the alkaline discharge capacity of electrolytic manganese dioxide. The process comprises forming a mixture of electrolytic manganese dioxide, a carbon material and a strong base electrolyte and subjecting the mixture to electrochemical oxidation, in the presence of additional strong base electrolyte, while maintaining the mixture in an anodic condition. The process further comprises leaching the oxidized mixture to effect removal of any water soluble manganese salt byproducts formed during the electrochemical oxidation process.

Abstract: Chemically inert pigmentary zinc oxide compositions, useful in producing UV light stable polymeric resin compositions are prepared by wet treatment of chemically reactive zinc oxide base pigments utilizing a process wherein chemically inert organic or inorganic coatings are deposited thereon.

Abstract: A harvester for removing a substance deposited on the surface of a plate comprising a tool having a strike end and means for supporting the tool near the surface of the plate so the strike end of the tool strikingly engages the substance on the plate for removing the substance.

Abstract: A method and apparatus for removing soot from an exhaust gas stream wherein the exhaust gas stream is contacted with water to produce a substantially water saturated exhaust gas stream, particles and droplets in the water saturated gas stream then are electrically charged to produce a gas stream containing electrically charged particles and droplets, and an electric field is established for electrostatically attracting and de-entraining soot and soot containing water droplets from the gas stream containing electrically charged particles and droplets to produce a substantially soot free exhaust gas stream. The present invention includes a precipitator wherein the insulators are positioned in low dew point relatively clean locations and, in one embodiment, includes the use of the exhaust gas stream to maintain the temperature level of the insulators above dew point.

Abstract: The present invention relates to a method for chemically treating structures fabricated from titanium based alloy compositions which compositions inherently possess positive open circuit corrosion potentials and reduced rates of corrosion properties. The method comprises contacting said fabricated structures with an aqueous pickling solution of hydrofluoric and sulfuric acids at a temperature of at least ambient temperature. This contact is continued for a time sufficient to remove any deleterious oxide layers adhered to the surfaces of the alloy compositions of the fabricated structures.

Abstract: An improved process is provided for the removal and recovery of acidic gases contained in mixed gas streams. The improvements comprise cooling a process regenerated aqueous alkanolamine solution containing an alkanolamine concentration ranging up to about 20 percent by weight to a temperature ranging up to about 35.degree. C. and introducing said cooled regenerated solution into an absorption zone to contact a mixed gas stream containing acidic gases and wherein the regenerated aqueous alkanolamine solution remains essentially at the temperature to which it is cooled throughout a substantial portion of the absorption zone.

Abstract: A process for the preparation of high purity manganous-manganic oxide (Mn.sub.3 O.sub.4) is provided, wherein particulate manganese metal suspended in an aqueous solution containing a water soluble ammonium salt is oxidized in the presence of an oxidizing agent at a temperature of at least 30.degree. C.

Abstract: The present invention relates to an improved process for the recovery, individually, of natural gas liquids methane and nitrogen from a gaseous feed stream such as natural gas without the need for auxiliary refrigeration and without or with only minimal need for supplemental compressor or pumping equipment. The gaseous feed stream is separated in multiple steps utilizing process-derived streams and minimal pressure reductions to achieve and provide the refrigeration requirements necessary to effect the separation.

Abstract: A method for reducing the amount of particles which become airborne during either or both the dismantling and moving of structures wherein a foam is sprayed on the structures prior to either or both the dismantling and moving of such structures.

Abstract: The beneficiation or upgrading of an iron-containing titaniferous ore to a synthetic rutile by subjecting the ore to reduction followed by acid leaching of the reduced ore is improved by forming a mixture of the ore and an aqueous sulfuric acid solution, adding a reducing agent to this mixture and then subjecting this mixture containing the reducing agent to reduction at elevated temperatures. The resulting reduced ore, which is characterized by an increase in the ferrous iron content thereof and an increase in its specific surface area, exhibits an enhanced response to subsequent acid leaching to provide a synthetic rutile of improved purity.

Abstract: A process for producing agglomerated substantially completely hydrated detergent products is disclosed. The process includes forming an admixture containing, in combination, a hydratable condensed phosphate component, a hydratable detergent builder salt component, an alkali metal silicate and water, said water being present in an amount sufficient to effect agglomeration of the admixture and induce hydration of the hydratable components therein. A hardness sequestering agent then is added to the agglomerated and hydrated admixture and the resulting intermediate product subjected to aging to provide the finished agglomerated, substantially completely hydrated detergent product.

Abstract: An improved process for cryogenically separating a helium-bearing natural gas stream comprising subjecting the natural gas stream to a sequence of alternating cooling and separating steps wherein one or more process-derived streams are utilized to effect cooling of the natural gas streams to temperatures in the cryogenic range. The process provides for the separation and recovery of a natural gas liquids product stream consisting substantially of condensed C.sub.2 and higher hydrocarbons and a gaseous product stream consisting of at least 50 volume percent of helium with the balance being substantially nitrogen.

Abstract: A process is provided for preparing concentrated aqueous solutions of byproduct nitrate compounds from dilute aqueous streams containing said byproduct nitrate compounds, calcium ions and anionic species capable of reaction therewith at elevated temperatures. The process provides for the removal of the calcium ions by the addition of a source of carbonate ions to said stream to form solid, particulated calcium carbonate therein, the separation of the solid particulate from the stream, the neutralization of the stream and concentration of the stream to provide a concentrated aqueous solution containing the byproduct nitrate compound.

Abstract: There are provided titanium dioxide pigments characterized by improved gloss developing and dispersibility properties in surface coating vehicles and reduced tendencies to adsorb moisture. Said titanium dioxide pigments comprise pigmentary titanium dioxide particles having deposited thereon a treating agent comprising at least one amine salt of a polyprotic acid having pK.sub.a1 value greater than about 2.5 and a water solubility at 20.degree. C. of at least 2.0 weight percent and an alkanolamine having a pK.sub.b1 greater than about 4.4.