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| Number | Title | Issue Date |
| 6929200 | Method for preventing asbestos from freeing airborne particles The method for preventing asbestos from freeing airborne particles comprises sequentially heating and the asbestos in the following surrounding temperatures values and maintaining the asbestos in these surrounding temperature values until the asbestos changes to the... | 08/16/2005 |
| 6921553 | Non-ionic foam composition for treating asbestos-containing materials and method of using same A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, at least about 0.1% by weight of a source of fluoride ions... | 07/26/2005 |
| 6589156 | Non-ionic foam composition for treating asbestos-containing materials and method of using same A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, at least about 0.1% by weight of a source of fl... | 07/08/2003 |
| 6391271 | Process for the treatment of waste containing asbestos A method for processing asbestos-containing waste from a waste generating site, wherein the waste is transferred from the site to a processing reactor without exposing the waste to an external environment, a basic reaction solution is fed into the reactor... | 05/21/2002 |
| 6160195 | Use of reagents to convert chrysotile and amosite asbestos used as insulation or protection for metal surfaces A composition for converting asbestos-containing material, covering metal pipes or other metal surfaces, to non-regulated, environmentally benign-materials, and inhibiting the corrosion of the metal pipes or other metal surfaces. The composition comprises... | 12/12/2000 |
| 5980854 | Method for the production of a magnesium chloride solution The present invention is concerned with a method for the extraction of magnesium from magnesium-containing materials such as magnesite, dolomite and silicates materials like serpentine residues, products from the amphibole or pyroxene group. The magnesium... | 11/09/1999 |
| 5753031 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an inorganic acid, and from about 0.1 to about 4% by weight of a h... | 05/19/1998 |
| 5753035 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an inorganic acid, and from about 0.1 to about 4% by weight of a t... | 05/19/1998 |
| 5753034 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of a hexafluorosilicate salt, and free of or having only small amount... | 05/19/1998 |
| 5753033 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of a boron tetrafluoride salt, free of or having only small amounts o... | 05/19/1998 |
| 5753032 | Composition and method to remove asbestos A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of phosphoric acid, and from about 0.1 to about 4% by weight of a sou... | 05/19/1998 |
| 5743841 | Foam composition for treating asbestos-containing materials and method of using same A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, at least about 0.1% by weight of a source of fl... | 04/28/1998 |
| 5741358 | Corrosion inhibiting composition for treating asbestos containing materials A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of an acid component, optionally a source of fluoride ions, and a cor... | 04/21/1998 |
| 5543120 | Method for converting asbestos to non-carcinogenic compounds Hazardous and carcinogenic asbestos waste characterized by a crystalline fibrous structure is transformed into non-carcinogenic, relatively nonhazardous, and non-crystalline solid compounds and gaseous compounds which have commercial utilization. The asbe... | 08/06/1996 |
| 5516973 | Method for treating asbestos A method for rendering asbestos in an asbestos-containing material harmless comprises wetting the material with an aqueous solution containing about 1 to 25% by weight of an organic acid, such as trifluoroacetic acid and at least 1% by weight of a source ... | 05/14/1996 |
| 5439322 | Asbestos abatement Asbestos products installed in buildings are treated by application of an aqueous solution that coalesces anti/or encapsulates the asbestos fiber and dust content thereof. Textured asbestos containing materials are thereby rendered safe in an economical, ... | 08/08/1995 |
| 5264655 | Method and products for treating asbestos A method for rendering asbestos in an asbestos-containing material harmless comprises wetting the material with an aqueous solution containing about 1 to 25% by weight of an organic acid, such as trifluoroacetic acid and at least 1% by weight of a source ... | 11/23/1993 |
| 5258131 | Products for treating asbestos Treatment solutions for removing asbestos containing materials from substrates and for converting asbestos-containing materials to a non-asbestos material, which comprises an aqueous solution containing about 1 to 25% by weight of an acid and 1 to 10% by ... | 11/02/1993 |
| 5258562 | Method for treating asbestos A method for treating asbestos-containing material for removing such material from a substrate where it is installed and for destroying the asbestos in such asbestos-containing material, comprising wetting the material with an aqueous solution containing ... | 11/02/1993 |
| 5096692 | Mineralogical conversion of asbestos waste There is provided a process for the mineralogical conversion of waste asbestos to a non-asbestos product. The waste asbestos is treated with a mineralizing agent and then heated for a period of time sufficient to convert the asbestos to the non-asbestos p... | 03/17/1992 |
| 5085838 | Thermal modification of asbestos A process is provided for converting asbestoform material into an environmentally safe material by heating the asbestoform material with an alkaline flux so as to change the crystalline structure of the asbestoform material to a form that is environmental... | 02/04/1992 |
| 5041277 | Method for treating asbestos A method for rendering harmless chrysotile asbestos comprises wetting the asbestos fibers with an aqueous solution containing about 1 to 10% by weight of a weak organic acid, such as trifluoroacetic acid. The weak acid solution hydrolyzes the magnesium ox... | 08/20/1991 |
| 5006490 | Method for the formation of refractory products from and disposal of asbestos A method of physically and chemically altering asbestos which comprises mixing the asbestos with a selected metal and reacting the mixture to form an end product including slag, in which the asbestos has been altered allowing its safe disposal or its form... | 04/09/1991 |
| 4978516 | Process for treating talc A process for improving a purity and/or whiteness degree of a talc powder is disclosed. A talc powder with a particle size of about 0.8 mm or less containing impurities such as asbestos, etc. is treated with a phosphoric acid agent under heating at from 7... | 12/18/1990 |
| 4812204 | Process for obtaining boric acid treated asbestos fiber The invention relates to novel borated asbestos fibers which possess improved filtration properties.... | 03/14/1989 |
| 4495223 | Process for phosphating asbestos fibers There is disclosed an improved process for phosphating asbestos fibers by reacting phosphorus chlorides with asbestos fibers in a first reaction vessel heated to a temperature within the range of the boiling temperature of the selected phosphorus chloride... | 01/22/1985 |
| 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 contacting a silicate mineral, such as asbestos, with a metal-wea... | 08/30/1983 |
| 4356057 | Phosphated asbestos fibers There is disclosed chemically modified chrysotile asbestos fibers, more particularly phosphated asbestos fibers containing from 0.5 to 5% by weight of phosphate groups and heat treated phosphated asbestos fibers, both of which have an infrared spectrum wh... | 10/26/1982 |
| 4335083 | Method for leaching magnesium from magnesium hydroxide-containing composition A method for leaching magnesium from a magnesium hydroxide-containing composition, especially a mineral, which comprises contacting said composition with an aqueous solution of an ammonium salt whose corresponding magnesium salt is soluble in said aqueous... | 06/15/1982 |
| 4328197 | 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 contacting a silicate mineral, such as asbestos, with a metal-wea... | 05/04/1982 |
| 4289736 | Filtering of precipitating silica The addition of an excess of asbestos tailings in the course of the extraction of magnesium from asbestos tailings by digestion with an acid greatly facilitates the elimination of silica and other impurities by filtration of the resulting reaction mixture... | 09/15/1981 |
| 4277449 | Dry reaction process of asbestos tailings and ammonium sulfate There is disclosed a dry process for preparing magnesium sulfate by heating one surface of a reaction mixture of asbestos tailings to a temperature of from 350° to 400° C. whereby there is provided a gradient temperature between the heated zone, an inte... | 07/07/1981 |
| 4272495 | Chemical processes String-like agglomerates of chrysotile asbestos fibers are recovered from crude asbestos by first forming a stable gel structure of asbestos and dispersing agent, diluting the gel structure dispersion with water in a first dilution step to form a readily ... | 06/09/1981 |
| 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.... | 03/31/1981 |
| 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.... | 03/11/1980 |
| 4181607 | Removal of asbestos fibers from water Asbestos fibers are removed from water by filtration through a bed of magnesium oxide.... | 01/01/1980 |
| 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. without loss of water of crystallization and fibre strength. Th... | 12/25/1979 |
