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3960747 |
Process for the production of an acidic aqueous solution of silico-formic acid
An acidic solution of silico-formic acid is obtained by adding a solution of silico-formic acid in a dilute alkali metal hydroxide solution or an alkali metal silico-formate solution slowly into an...
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3954943 |
Synthesis of hydrous magnesium silicates
Hydrous magnesium silicates having a crystal structure similar to that of natural hectorite may be prepared utilising as starting material a novel intermediate which may be prepared from talc. The...
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3941872 |
Method for producing calcined clay pigments
Naturally-occurring hydrated kaolin clay is calcined under a reducing atmosphere at a temperature of at least 1400°F., preferably in the range of about 1600°F. to 2100°F., and then the clay is...
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3941871 |
Crystalline silicates and method of preparing the same
A crystalline metal organosilicate having the composition, in its anhydrous state, as follows: 0.9 ± 0.2 [xR 2 O + (1-x) M 2 /n O]: <.005 Al 2 O 3 :>1SiO 2 where M is a metal, other...
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3939249 |
Purification of talc
An arsenic sulfide mineral impurity, such as gersdoffite, is removed from talc by an oxidative leach treatment at a pH below 2.
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3936383 |
Sol of ultra-fine particles of synthetic hectorite
This invention relates to a sol of ultra-fine particles of synthetic hectorite prepared by swelling and cleaving Li-hectorite having a formula of Li 1 /3 Mg 2 -2/3 Li 1 /3 (Si 4 O 10 )F 2 or...
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3928539 |
Method for continuously producing hydrated calcium silicates
A method for producing hydrous calcium silicates such as xonotlite, tobermorite and the like, which comprises interacting a siliceous material and a calcareous material or a siliceous material, a...
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3926647 |
Process for the production of synthetic wollastonite and diopside
Synthetic wollastonite is produced by sintering a mixture of silica and calcium oxide, and synthetic diopside or a mixture thereof with synthetic wollastonite is produced by sintering a mixture of...
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3895096 |
Method of producing hydrous calcium silicate products and the products thereof
An improvement in a process of manufacturing hydrous calcium silicate products is disclosed. The products are prepared from a molded aqueous slurry of reactive cementitious materials, organic...
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3876749 |
Method for the reduction treatment of red mud
The red mud by-product of the Bayer aluminum manufacturing process is utilized by mixing the red mud with a reducing agent, reducing the red mud, separating it into molten steel and molten slag,...
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3873669 |
PROCESS FOR TREATMENT OF VANADIUM CONTAINING FLY ASH
The invention is addressed to the recovery of vanadium by the treatment of fly ash derived from bituminous or petroleum products, such as bituminous schists. In accordance with the practice of this...
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3861935 |
SYNTHETIC CRYSTALLINE BETA-WALLASTONITE PRODUCT
Substantially pure, synthetic crystalline α-wollastonite having a specified BET surface of 1-30 m 2 /g made by first producing calcium silicate hydrates having a molar ratio of SiO 2 :CaO =...
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3832441 |
METHOD OF MANUFACTURING ZIRCONIUM OXIDE AND SALTS
A process for the production of calcium zirconate and zirconium oxide or salts therefrom which is characterized by reacting the mineral zircon with limestone to form calcium zirconate and...
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3816149 |
HYDRATED CALCIUM SILLICATE PRODUCTS
A process is described for the formation of shaped hydrated calcium silicate products. The process comprises reacting a concentrated aqueous slurry of calcium oxide and silica sources in the...
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3806585 |
PROCESS FOR PRODUCING XONOTLITE TYPE HYDROUS CALCIUM SILICATE
A hydrous calcium silicate compsed preponderantly of xonotlite of the shape of rod crystals is produced by adding 0.05 to 3 percent by weight of an alkali to a substantially equimolar mixed slurry...
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3755183 |
METHOD OF PREPARING SILICATE ADSORBENTS AND DRYING AGENTS AND PRODUCT THEREOF
Silicate adsorbents and drying agents are prepared by forming precipitation products from aqueous alkali metal silicate solutions and solutions of salts containing di- and trivalent metals. The...
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3719747 |
HYDROTHERMAL PROCESS FOR MAKING HYDROGEN FLUORIDE
This invention provides a hydrothermal process for the manufacture of hydrogen fluoride. The process comprises adding a mixture of calcium fluoride and silica to a reaction zone, providing a heat...
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3660021 |
PREPARATION OF FINELY DIVIDED CALCIUM SILICATE
A new type of finely divided calcium silicate has been produced by reacting calcium sulfate with sodium silicate an amounts to form theoretically a composition containing from about 0.7 to about...
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3542509 |
PROCESS FOR CHARGING OF ION-EXCHANGERS
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3523764 |
PROCESS FOR THE MANUFACTURE OF MAGNESIUM ALUMINOSILICATE FOR MEDICAL USES
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3519389 |
PROCESS FOR REMOVING TITANIUM DIOXIDE SCALE FROM REACTOR WALLS
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3509057 |
METHOD FOR THERMAL SYNTHESIS OF POLYOXIDE COMPOUNDS
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3501324 |
MANUFACTURING AQUEOUS SLURRY OF HYDROUS CALCIUM SILICATE AND PRODUCTS THEREOF
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3482941 |
DIRECT PRODUCTION OF MONOTUNGSTEN CARBIDE FROM ORES
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3463607 |
METHOD OF SYNTHESIZING ASBESTOS
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3443891 |
METHOD AND APPARATUS FOR GROWING LARGE MONOCRYSTALS OF NONMETALLICS
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3442605 |
CONTINUOUS COUNTER-CURRENT WASHING SYSTEM BY THICKENER METHOD
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3427249 |
CONDITIONING POWDER FOR DRYCLEANING SOLVENT
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3401015 |
Magnesium silicate and process for making same
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3399033 |
Crystallization of tungsten disulfide from molten slags
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3370917 |
PRODUCTION OF ZEOLITIC ADSORBENTS IN NODULAR FORM
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3360333 |
Fluor-micas and fluor-amphiboles and methods for making same
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3272594 |
Preparation of magnesium trisilicate
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3264130 |
Pigment and process of producing same
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3257220 |
Method of manufacturing calcium silicate insulating materials
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3235330 |
Recovery of phosphorus values and cement clinker from a phosphatic ore
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3215601 |
Antacid composition and method of making same
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3215494 |
Method of treating chrysotile and product produced thereby
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3205036 |
Preparation of calcium dihydrogen orthosilicate
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3201196 |
Fibrous sodium metal silicates
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3198622 |
Chemical-physical treatment of ores, and/or ore residues
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3162380 |
Method of treating asbestos minerals
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3154381 |
Progressive melting and crystallization of synthetic mica
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3131072 |
Novel silica aerogels and processes for preparing same
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3131024 |
Method of producing dicalcium silicate alpha hydrate
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3131148 |
Thickened compositions
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3116971 |
Method for the concurrent production of alkali metal aluminate and hydrogen fluoride
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3115391 |
Method of producing tricalcium silicate hydrate
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3110606 |
Preparation of crystalline silicic acid pigments
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3090669 |
Method of making synthetic mica
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