Abstract: A dry predispersed coated pigment, immediately suitable for mixing in an ink system without milling, is prepared byA. mixing at least 90 parts of a pigment (e.g. carbon black) and not more than about 10 parts of a hydrocarbon natural fossil resin, solvent-extracted from coal,B. fusing the mixture,C. milling the mixture to obtain the approximate particle size distribution of the original pigment, andD. densifying or beading the mixture.The product having this composition and prepared by this process is a dry pigment suitable for simple mixing with an ink system to give a ready-to-use printing ink.

Abstract: A basic fused refractory material consisting essentially of, by weight on the oxide basis, 50-67% MgO, 33-50% CaO, and preferably at least 98% MgO + CaO. The method of producing the fused refractory material by melting and solidifying a batch of refractory raw materials, wherein the cooling rate inducing solidification throughout the fused melt is at least 600 Centigrade degrees per hour and sufficient to yield the fused refractory product characterized by a fine microstructure retaining at least 2.0% MgO in solid solution in the lime phase and increased hydration resistance of the fused refractory material.

Abstract: The surface of an inorganic substrate comprising cement, concrete, gypsum or mixtures thereof is treated with a silicate solution or a silica sol comprising a monovalent alkali metal containing component, an ammonium containing component and a silica containing component at a molar ratio of 1:1.about. 10:4.about.5000 corresponding to M.sub.2 O:[R.sub.1 R.sub.2 R.sub.3 R.sub.4 N].sub.2 O: SiO.sub.2 wherein M is Li, K or Na; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent a hydrocarbon group or an alkanol group. The underlying inorganic substrate thus has a modified surface layer thereon having a thickness of less than 50 mm, which functions to protect and prevent deterioration of the underlying surface of said inorganic substrate.

Abstract: In the manufacture of cement clinker from limestone and clay components exhaust gases from a rotary kiln are delivered via a conduit to the final stage of a multiple stage cyclone preheater for the limestone. The limestone and low grade fuel are introduced to the conduit and calcined therein by a separate firing process immediately prior to the discharge of the calcined limestone to the kiln.

Abstract: A magnesia cement composition comprising active magnesia, magnesium sulfate, and pulp or a mixture of pulp and fibrous glass. When hardened, this composition yields a crack-free low-shrinkage material. Valuable composite boards are obtained by lamination from the hardened composition and core materials such as cellular concrete, plywood, plastic foam, gypsum plaster board, and cemented excelsior board.

Abstract: An improved expansive cement composition is provided which has the increased capability of being able to " grab" steel reinforcement members therewithin as the material is curing and expanding to result in effective stressing of the reinforcement members. This cement is made of particulate argillaceous and calcareous materials, and contains from about 1 to about 70% by weight of free CaO and from about 2 to about 7% by weight of MgO uniformly distributed therein, with the remaining portion being primarily tricalcium silicate and containing substantially no dicalcium silicate.

Abstract: The potential K.sub.2 O content of cement clinker due to the presence of potassium compounds in the raw feed mix is substantially eliminated by introducing an active agent into the kiln along with or in conjunction with the fuel used to fire the kiln. The active agent is effective to convert K.sub.2 O to KCl and preferably is a chlorinated organic waste product burned along with the fuel.

Abstract: A process of treating kiln flue dust from Portland cement manufacture which comprises calcining said flue dust together with a minor proportion by weight of a fluoride salt.

Abstract: Compound isotropic ceramic substance having ceramic fibers dispersed in a proportion greater than 20% by weight of the total weight of the final product, having excellent resistance to thermal shocks. The ceramic substance is constituted by ceramic fibers with calcium aluminate fulfilling the function of a hydraulic binding agent. The dispersing of the fibers in the binding agent may be obtained either in contact with a weight of water of the order of the weight of solid ingredients or dry, with water then being incorporated in a subsequent stage of the manufacturing process.

Abstract: An aluminum phosphate type binder composition includes certain other metallic phosphates in proportions of equivalents of aluminum to the other metals between about 0.70 and 2.90, and proportions of the sums of all of the metals to mole equivalents of phosphoric acid lie between about 1.00 and 1.80. A method of producing the binder includes adding a slurry of aluminum hydroxide and certain other metallic salts to phosphoric acid in such a way as to generate sufficient heat to permit the reaction to proceed to completion at or near the boiling point.

Abstract: A method of molding porous cores or barrier materials for filtering, drying and removing acids from refrigeration or air conditioning systems includes mixing active solid ingredients in a nominal fully activated condition with a modified phosphate binder, immediately molding the mixed "desiccant" and binder into a desired shape, ejecting the green formed unit, and drying and firing the unit.

Abstract: Portland cement raw material components completely calcined before being sintered in a rotary kiln by blending clay and limestone to high and low calcium blends and feeding each blend through separate vertical calciners into which heat is directed from above in counter-current to an updraught of air.

Abstract: The disclosure relates to monolithic refractories which can be used on the job site without any preparation, i.e. addition of additives and consists of a high alumina containing material, a reactive alumina containing material, kaolin clay and crude kyanite to which are added the combination of phosphoric acid and water.

Abstract: The invention relates to expanded synthetic calcium silicates, particularly of a kind having a white or other pure color.

Abstract: A composition suitable for use in the plugging of tapholes of a metallurgical furnace is provided, which comprises a mixture of 60-80% refractory and erosion-corrosion resistant grain material, 12-18% binder substantially on the basis of tar products, and 4-12% bonding clay. Preferably: the binder contains 65-75% of electrode pitch, 9-11% of C.sub.2 -resins and has a viscosity less than 8000 cp. at 20.degree. C; the refractory consists 20-40% of sieve fractions of approximately 3-6 mm, the balance being of finer grains; the composition also contains ground soft coal, approximately to 10%; the refractory is burned magnesite with over 80% MgO content, or a mixture of 56-100% of Al.sub.2 O.sub.3 and from 0-44% SiO.sub.2, or a mixture containing 50-100% SiO and from 0-50% SiO.sub.2 ; and the refractory material contains impurities reducing its sintering point toward or below 1300.degree. C.

Abstract: Production of building bricks utilizing as an ingredient thereof, advantageously in substantial or in major proportion of brick-forming compositions or mixtures of ingredients, ore residues obtained from the extraction of lithium values from beta-spodumene. The said residues so utilized result from a process in which beta-spodumene is subjected to a sulfuric acid roast, the lithium values are then extracted from the acid-roast product by an aqueous extraction liquid, followed by neutralization with lime or limestone, and separation of the formed lithium sulfate by filtration, leaving the ore residues which are then utilized in admixture with other ingredients to produce bricks possessing excellent strength and other desirable properties.

Abstract: A composition is essentially of an ettringite base and contains from about 45 to 93% calcium trisulfoaluminate and from about 7 to about 55% tobermorites, of which from about 0 to 25% is hydrated silica, counted in the form of SiO.sub.2.

Abstract: The invention relates to dry heterogeneous refractory compositions comprising 90 to 30% by weight of a chamotte or grog and 10 to 70% by weight of a fine part comprising from 0 to 70% of weight of corundum or alumina and from 30 to 100% by weight of a substance comprising at least 70% by weight of zirconia, the said fine part having a silica content of less than 30% of its zirconia content, the percentages by weight of chamotte and of the fine part being stated with reference to the total weight of these two constituents, and the composition of the fine part being adapted to the chamotte so that the final material possesses in use a homogeneous resistance to chemical corrosion and to mechanical wear. These compositions are useful for the preparation of agglomerated refractory articles and of unshaped refractory products.

Abstract: A polymerization catalyst comprises a solid transition metal compound which has been ground with a Lewis Base, an organo-metallic compound of a non-transition metal and a cyclic polyene, preferably with a further quantity of the same, or a different, Lewis Base. The catalyst can be used to polymerize propylene to give a high yield of a polymer having a flexural modulus in excess of 1.00 GN/m.sup.2.

Abstract: A hydrothermal cement composition consisting essentially of (a) a polyvalent metal ion source, (b) water, and (c) a hydratable silica source wherein the silica becomes available for chemical combination with the polyvalent metal salt upon application of heat. A method of cementing a string of pipe in a bore hole including the steps of preparing such a cement composition, pumping the cement composition into the annular space between the string of pipe and the walls of the bore hole, and allowing the cement to set due to the temperature of the bore hole or by passage of time or both.