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4482531 |
Synthesis of ZSM-12 zeolite
There is disclosed a process for preparing a ZSM-12 crystalline zeolite wherein the organic template used in the synthesis has the formula: ##STR1## wherein n=4,5,6 or 10. The template, designated...
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4481177 |
Synthesis of zeolite ZSM-22 with a heterocyclic organic compound
An improved process for preparing ZSM-22 zeolite is disclosed and claimed. The process comprises preparing a reaction mixture comprised of sources of an alkali or alkaline earth metal, alumina,...
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4481173 |
Manufacture of low sodium zeolite
The alkali metal content of zeolite ZSM-11 in its as-synthesized form is reduced by crystallizing the zeolite from a solution containing a source of benzyltrimethyl ammonium ions.
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4476187 |
Non-sintered quartz ware and method for producing the same
In the method for manufacturing a non-sintered quartz ware the quartz and clay are comminuted and fully mixed to make a batch of raw materials. The batch is then added with an effective amount of...
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4474742 |
Treatment of asbestos
Toxicity of asbestos is reduced by treating it with non-mutagenic non-toxic hydroxamic acid iron-chelating agents.
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4443550 |
Glass composition suitable for production of fibrous wollastonite, method for producing said wollastonite, and wollastonite obtained thereby
A glass composition suitable for production of a fibrous wollastonite comprising, in % by weight: TBL ______________________________________ SiO 2 35 to 60 CaO 30 to 55 B 2...
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4438016 |
Stable aqueous cleaning agents and a process for their production
Stable, aqueous cleaning agents containing (a) anionic and/or nonionic surfactants, optionally chlorine-stable, (b) an abrasive component and/or (c) an active-chlorine-releasing compound and,...
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4432804 |
Process for producing a mixture of tobermorite and ettringite
A lime material and a siliceous material containing 10 to 40% by weight of alumina are admixed with an alkali solution, and the mixture is subjected to hydrothermal reaction with saturated water...
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4430249 |
Preparation of aqueous suspensions of talc
In order to make talc more readily dispersible in an aqueous medium, it is contacted, in a finely divided form, with an aqueous solution of an alkali metal hydroxide or ammonium hydroxide, it is...
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4401636 |
Novel metal-micelle asbestos and treatment of asbestos and other silicate minerals to reduce their harmful properties
Silicate minerals, including asbestos fibres, are rendered less harmful by forming metal-micelle polymer coatings on the silicate. A metal-micelle polymer coating is formed on a silicate by...
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4397827 |
Silico-crystal method of preparing same and catalytic conversion therewith
A new porous silico-crystal, designated as ZSM-48, a method of making same and the use thereof in catalytic conversion of organic compounds. The new product has a composition, expressed in terms of...
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4395357 |
Calcium silicate granules forming a microporous structure
The invention deals with calcium silicate granulates or powders with a microporous structure, which are obtained, by reacting crystalline or, if required, amorphous silicon dioxide, or materials...
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4366136 |
Moldable prepolymers based on alkali metal silicates and alkaline earth metal silicates
Prepolymers of alkali metal silicates and/or alkaline earth metal silicates and metal oxides, which can be used as molding compositions, preferably compression molding compositions, for the...
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4351814 |
Hydrotalcites having a hexagonal needle-like crystal structure and process for production thereof
Fibrous hydrotalcites having a hexagonal needle-like crystal structure. The fibrous hydrotalcites are produced by contacting a basic magnesium compound having a needle-like crystal structure and...
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4336142 |
Removal of heavy metals with gamma dicalcium silicate
According to the present invention we provide a method of controlling the heavy metal content of the water in an aqueous system which comprises incorporating in the system an amount of gamma...
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4333842 |
Piezoelectric single crystal and surface acoustic wave element employing the same
A piezoelectric single crystal which has a composition represented by a general formula (Ba 2 -x Sr x )TiSi 2 O 8 , the value x lying within a range of 0.25≤x≤1.2; and a surface acoustic wave...
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4314980 |
Preparation of reactive beta-dicalcium silicate
This invention relates to the preparation of fine particles of reactive beta-dicalcium silicate by means of a solid state process which comprises firing a mixture of calcium sulfate, silica and a...
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4303553 |
Neutron-protection heat insulating material
A neutron protection thermal insulating material is obtained by adding a boron compound and, if necessary, a hydrous compound, to chrysotile asbestos fibers. To form the material, the asbestos is...
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4299808 |
Crystalline chromosilicates and process of preparation
There are provided crystalline chromosilicates, their methods of preparation, and process uses. A first crystalline chromosilicate comprises a molecular sieve material providing a specific X-ray...
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4298386 |
Calcium silicate and process for producing same
Globular secondary particles of wollastonite group calcium silicate crystals represented by the formula lCaO.mSiO 2 .nH 2 O wherein 1≤l≤6, 1≤m≤6 and 0≤n≤1, characterized in that the...
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4294810 |
Alkali calcium silicates and process for preparation thereof
Disclosed is an alkali calcium silicate having two different X-ray diffraction patterns: (1) with diffraction peaks at spacings (d) of 11.8-12.2 A, 6 A and 3 A or (2) with diffraction peaks at...
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4287167 |
Novel harzburgite and preparation thereof
There is provided a novel harzburgite of the formula Py x Ol (1-x) where x is a decimal number of from 0.001 to 0.4, Py is an abbreviation for pyroxene, and Ol is an abbreviation for olivine...
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4287166 |
Zeolite ZSM-39
A new porous zeolite, a method of making same and the use thereof in catalytic conversion of organic compounds. The new product has a composition, expressed in terms of moles of anhydrous oxides...
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4264563 |
Preparation of calcium fluoride from fluosilicic acid solutions
A fluosilicate material is added to a suspension of lime in water heated to a temperature at or near its boiling point to form a solid calcium fluoride product in which the silicon present in the...
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4259146 |
Method of heat treating chrysotile asbestos fibres
Asbestos fibres having excellent properties in resin reinforcement are produced by controlled heat treatment of a coarse fraction of chrysotile asbestos fibres.
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4243429 |
Process for producing tobermorite and ettringite
A lime material and a siliceous material containing 10 to 40% by weight of alumina are admixed with an alkali solution, and the mixture is subjected to hydrothermal reaction with saturated water...
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4234380 |
Polymeric silicate material and a method of manufacturing the same
A polymeric silicate material having a substantially fibre- or flake-like microstructure is manufactured from a starting material comprising mainly natural or synthetic silicate mineral e.g.,...
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4209499 |
Crystalline zeolite ZSM-43 synthesis thereof
A new crystalline zeolite, designated ZSM-43, a method of making same and the use thereof in catalytic conversion of organic compounds is the subject of this application. The new zeolite has a...
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4192707 |
Heat treatment of chrysotile asbestos fibres
Asbestos fibres having excellent properties in resin reinforcement are produced by controlled heat treatment of a coarse fraction of chrysotile asbestos fibres.
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4190632 |
Process for treating air-borne (metallic) dusts containing silicon dioxide to form precipitated silicic acids and silicates
There is provided a process for treating air-borne dust containing silicon dioxide in order to form a silicic acid or a silicate. The air-borne dust is dissolved in an alkali metal hydroxide...
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4181607 |
Removal of asbestos fibers from water
Asbestos fibers are removed from water by filtration through a bed of magnesium oxide.
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4180433 |
Production of improved chrysotile asbestos fibres
The filtration rate of asbestos-cement slurries formed from chrysotile asbestos fibres is improved by controlled heat treatment of the fibres at a temperature of about 400° to about 600° C....
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4172882 |
Lithium ion transport compositions
Fast lithium-ion conductors are provided having low resistivities and low-activation-energy mobilities at temperatures at which lithium salts are molten. The novel compounds promote lithium-ion...
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4163735 |
Catalyst preparation method
Copper-magnesium silicate-carbonate catalysts of improved activity and catalyst life for use in continuous hydration of acrylonitrile to acrylamide are prepared by a novel method in which magnesium...
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4162924 |
Shaped bodies of calcium silicate and process for producing same
A shaped body of calcium silicate characterized by being composed of globular secondary particles interconnected with one another and each made up of lath-like xonotlite or foshagite crystals...
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4122151 |
Process of stabilization of dibasic calcium phosphate dihydrate against hydrolysis with cyclic aminophosphonic acids
A process for stabilizing dibasic calcium phosphate dihydrate against hydrolysis comprising treating an aqueous suspension of dibasic calcium phosphate dihydrate at a pH of from 5 to 10 with a...
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4113833 |
Process for the production of alumina from the mineral component of solid fuels
The invention relates to a process for the production of alumina from mineral component of solid fuels containing aluminum, silicon and iron oxides. The process comprises burning a mixture of a...
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4067819 |
Synthetic tetra-silicic mica and water sol thereof
This invention relates to a process for producing a tetra-silicic mica having the formula Na 0 .6 - 0.8 Mg 2 .6 - 2.7 (Si 4 O 10 )F 2 which comprises mixing components selected from the group of...
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4054537 |
Process for synthesizing compositions containing smectite-type clays and gellants produced thereby
This invention provides a process for synthesizing compositions containing trioctahedral smectite-type clays which contain fluorine within their layer lattices. In particular, the invention...
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4049780 |
Production of magnesium silicates
Hydrous magnesium silicates having a crystal structure similar to that of natural hectorite may be produced by a precipitation process in which silica is precipitated into a preformed aqueous...
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4045241 |
Synthetic taeniolite and process of producing the same
This invention relates to a process of producing taeniolite having the formula, LiMg 2 Li(X 4 O 10 )F 2 (wherein X represents Si or Ge), which comprises mixing (a) lithium compound selected from...
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4040974 |
Synthesized gellants containing smectite-type clay and process for producing same
This invention provides a gellant which is a synthesized complex of a fluorine-containing trioctahedral smectite-type clay and an amorphous occluded phase selected from the group consisting of...
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4029736 |
Processing pearlite to obtain metal silicates
Processing of pearlite by treating the same with an alkaline solution having a concentration of 40-140 g/l taken in an amount which brings the ratio of the liquid and solid phases to (0.7-1.5) : 1...
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3996142 |
Smoke and fire retardants for halogen-containing plastic compositions comprising the reaction product of magnesium oxide and a zinc salt of an acid
Magnesium oxide and a zinc salt are reacted with one another to form a magnesium zinc complex salt which is added to a halogen-containing plastic composition to serve as a smoke and/or fire...
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3988419 |
Process for producing calcium silicate insulation
Calcium silicate insulation consisting mainly of long, mutually entangled, fibrous synthetic xonotlite crystals and having a bulk specific gravity of 0.10 to 0.20 g/cm 3 is produced at a very low...
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3967974 |
Synthetic wollastonite and a process for its manufacture
Substantially pure, synthetic crystalline β-wollastonite having a specific BET surface of 1-30 m 2 /g made by first producing calcium silicate hydrates having a molar ratio of SiO 2 :CaO = about...
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3966884 |
Synthesis of wollastonite from natural materials without fusion
The present invention relates to a process for the synthesis of crystallized wollastonite from a natural material having a high content of calcium carbonate and silica. According to the invention,...
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3965241 |
Leaching tremolite impurity from talc
A process for removing tremolite impurity from talc by subjecting finely ground talc to a combination of steps including froth flotation and pressure leaching with a strong acid at an elevated...
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3962067 |
Process for the production of an aqueous solution of silicoformic acid
Silicoformic acid granules will go into solution when mixed in a dilute aqueous solution of an alkali metal hydroxide or an alkali metal salt of a weak acid.
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3962111 |
Process for the production of silico-formic acid granules containing an alkali catalyst
A dry alkaline earth metal metasilicate or an alkali metal metasilicate is chemically reacted with a concentrated mineral acid or an alkali metal hydrogen salt to produce silico-formic acid and a...
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