Source: https://patents.google.com/patent/US5849055?oq=flatulence
Timestamp: 2018-04-27 04:56:47
Document Index: 315019400

Matched Legal Cases: ['in fine', 'in fine', 'in fine', 'in fine', 'in fine', 'in fine']

US5849055A - Process for producing inorganic microspheres - Google Patents
Process for producing inorganic microspheres Download PDF
US5849055A
US5849055A US08813067 US81306797A US5849055A US 5849055 A US5849055 A US 5849055A US 08813067 US08813067 US 08813067 US 81306797 A US81306797 A US 81306797A US 5849055 A US5849055 A US 5849055A
US08813067
Masakuni Satoh
Namely, JP-A-58-156551 discloses a process which comprises melting materials such as SiO2, H3 BO3, CaCO3, Na2 CO3, NH4 H2 PO4 and Na2 SO4 at a high temperature of at least 1,000° C. to form a glass containing a sulfur content, then pulverizing the glass in a dry system, followed by classification to obtain fine glass powder, which is then dispersed and retained in a flame, so that is foamed by the sulfur content serving as a blowing component to form borosilicate type glass microballoons.
As the liquid constituting the slurry, a flammable liquid is used so that it will subsequently be sprayed and also burned for heating. As such a flammable liquid, an organic medium such as a hydrocarbon, an alcohol, an ether or a ketone may, for example, be employed. From the viewpoint of handling efficiency, the one having a boiling point of at least 50° C. is preferred. Particularly kerosine, light oil and an alcohol are easy to handle, inexpensive and readily combustible, whereby the mixed material can efficiently and uniformly be heated, and thus they are suitable for a liquid constituting the slurry of the present invention.
The heating temperature depends on the temperature at which the powder material fuses or sinters and on the residence time. Specifically, the temperature is from 300°to 2,500° C.
Using air as a spraying gas, the slurry was sprayed into air by a two fluid nozzle and, by bringing a flame close thereto, ignited to carry out spray combustion to obtain fine particles. The combustion temperature at that time was 1,200° C. The fine particles were recovered by a bag filter, and the following measurements were carried out with respect to the fine particles.
Using carbon dioxide gas as a spraying gas, the slurry of the material was sprayed into 100 vol % oxygen in a tubular furnace set at 2,500° C. by means of a two fluid nozzle and, by bringing a flame close thereto, ignited to carry out spray combustion to obtain fine particles. The fine particles were recovered by a bag filter, and the same measurements as in Example 1 were carried out. As a result, the average particle size was 5 μm, and particles of at most 30 μm constituted 97% of the entire particles. From the results of the scanning electron microscopic observation and the specific gravity measurement, each particle was found to be a spherical solid body. Further, from the results of the X-ray diffraction measurement, the fine particles were confirmed to be α-alumina.
Using air as a spraying gas, the slurry was sprayed into air by a two fluid nozzle and, by bringing a flame close thereto, ignited to carry out spray combustion to obtain fine particles containing a functional powder. The combustion temperature at that time was 1,200° C. The fine particles were recovered by a bag filter and the same measurements as in Example 1 were carried out, whereby the average particle size was 7 μm, and particles of at most 30 μm constituted 93% of the entire particles. From the scanning electron microscopic observation and the specific gravity measurement, each particle was found to be a spherical solid body. 30 wt % of the fine spherical solid bodies, 20 wt% of liquid paraffin and 50 wt % of vaseline were mixed and sandwiched in a thickness of 25 μm between quartz plates, whereupon the light transmittance was measured, and the transmittance of ultraviolet rays of 320 nm or less, was not higher than 23%, thus indicating an excellent ultraviolet ray absorbing function.
Using carbon dioxide gas as a spraying gas, the slurry was sprayed into 40 vol % oxygen by a two fluid nozzle and, by bringing a flame close thereto, ignited to carry out spray combustion to obtain fine particles containing a functional powder. The combustion temperature at that time, was 1,500° C. The fine particles were recovered by a bag filter, and the same measurements as in Example 1 were carried out, whereby the average particle size was 2 μm, and particles of at most 10 μm constituted 95% of the entire particles. From the results of the scanning electron microscopic observation and the specific gravity measurement, the fine particles were found to be spherical solid bodies. With respect to these particles, the light transmittance was measured in the same manner as in Example 3, whereby the transmittance of ultraviolet rays of 320 nm or less, was not higher than 20%, thus indicating an excellent ultraviolet ray absorbing function.
Using carbon dioxide gas as a spraying gas, the slurry of the material was sprayed into a gas comprising 40% of oxygen and 60% of carbon dioxide gas by means of a two fluid nozzle and, by bringing a flame close thereto, ignited to carry out spray combustion to obtain fine particles. The fine particles were recovered by a bag filter. From the elemental analysis by fluorescent X-ray, the content of titania was found to be 6 wt %. The average particle size as measured by a laser beam scattering method was 3 μm, and particles of at most 10 μm constituted 93% of the entire particles. From the results of the scanning electron microscopic observation, the particles were found to be spherical, and from the result of the X-ray diffraction measurement, they were found to be amorphous. Further, from the result of the specific gravity measurement, they were found to be solid bodies. Such silica-titania glass microbeads were baked in a baking furnace to obtain a formed product, and the linear expansion coefficient of the formed product was 0.1×10-7 (/°C.)
US08813067 1996-04-09 1997-03-07 Process for producing inorganic microspheres Expired - Fee Related US5849055A (en)
JP8685796A JP3633091B2 (en) 1996-04-09 1996-04-09 Manufacturing method for a micro inorganic spheres solid body
JP8-086857 1996-04-09
US5849055A true US5849055A (en) 1998-12-15
US08813067 Expired - Fee Related US5849055A (en) 1996-04-09 1997-03-07 Process for producing inorganic microspheres
US20020007650A1 (en) * 2000-06-05 2002-01-24 Murata Manufacturing Co., Ltd. Glass powder and manufacturing method therefor
FR2853893A1 (en) * 2003-04-17 2004-10-22 Yazaki Corp Production of hollow alumina particles by creation of atomized microdroplets from an aqueous solution containing aluminum nitrate or aluminum acetate and a surfactant or organic acid
US20040258601A1 (en) * 2002-07-15 2004-12-23 Asahi Glass Company, Limited Process for producing inorganic spheres
US20040256750A1 (en) * 2003-06-18 2004-12-23 Asahi Glass Company, Limited Process and apparatus for producing inorganic spheres
US20070231500A1 (en) * 2004-09-17 2007-10-04 Sylvain Rakotoarison Silica Microspheres, Method for Making and Assembling Same and Possible Uses of Silica Microspheres
US20080196448A1 (en) * 2007-01-23 2008-08-21 Schott Ag Sintering of fused silica to produce shaped bodies comprising crystalline SiO2
US20100067101A1 (en) * 2007-03-29 2010-03-18 Isuzu Glass Co., Ltd. Method for production of distributed refractive index-type optical element having ultraviolet ray-absorbing ability
US20110152056A1 (en) * 2009-12-21 2011-06-23 3M Innovative Properties Company Method for making hollow microspheres
US20110281113A1 (en) * 2009-01-22 2011-11-17 Katsumi Kamegawa Hollow carbon microparticle and method for producing same
WO2014113176A1 (en) * 2013-01-17 2014-07-24 Sibelco Asia Pte. Ltd. Charging load for making tft glass
US20160032085A1 (en) * 2013-03-29 2016-02-04 Lion Idemitsu Composites Co., Ltd. Polyarylene sulfide resin composition and use of same
US9321649B2 (en) 2007-12-03 2016-04-26 National Institute Of Advanced Industrial Science And Technology Carbon microparticle having lignin as raw material and preparation method therefor
GB1119260A (en) * 1965-09-23 1968-07-10 Philips Electronic Associated Improvements relating to methods of manufacturing granulated glass powder
US4352717A (en) * 1975-08-12 1982-10-05 Dowa Mining Co., Ltd. Apparatus for production of spherical grain ferrite powder
US4698317A (en) * 1984-04-24 1987-10-06 Kanto Kagaku Kabushiki Kaisha Porous cordierite ceramics, a process for producing same and use of the porous cordierite ceramics
WO1990002102A1 (en) * 1988-08-24 1990-03-08 Potters Industries, Inc. Hollow glass spheres
US5071635A (en) * 1988-02-18 1991-12-10 Mitsubishi Materials Corporation Method of preparing ceramic microspheres
FR2671072A1 (en) * 1990-11-14 1992-07-03 Saint Gobain Vitrage Int Silica-soda-lime glass, microspheres obtained from this glass and process for their manufacture
EP0598464A1 (en) * 1992-11-04 1994-05-25 GRACE GmbH Aluminum phosphate composition with high pore volume and large pore diameter, process for its production and use thereof
WO1995007177A1 (en) * 1993-09-08 1995-03-16 Pq Corporation Hollow borosilicate microspheres and method of making
US6866929B2 (en) * 1998-02-24 2005-03-15 Cabot Corporation Glass powders, methods for producing glass powders and devices fabricated from same
US7059153B2 (en) * 2000-06-05 2006-06-13 Murata Manufacturing Co., Ltd. Method for producing glass powders
US20100213628A1 (en) * 2000-12-07 2010-08-26 President And Fellows Of Harvard College Methods and compositions for encapsulating active agents
US7022300B2 (en) 2002-07-15 2006-04-04 Asahi Glass Company, Limited Process for producing inorganic spheres
US8221882B2 (en) 2003-06-18 2012-07-17 Asahi Glass Company, Limited Process and apparatus for producing inorganic spheres
US7927670B2 (en) * 2004-09-17 2011-04-19 Sylvain Rakotoarison Silica microspheres, method for making and assembling same and possible uses of silica microspheres
US8863552B2 (en) * 2007-01-23 2014-10-21 Schott Ag Sintering of fused silica to produce shaped bodies comprising crystalline SiO2
US8986838B2 (en) * 2009-01-22 2015-03-24 National Institute Of Advanced Industrial Science And Technology Hollow carbon microparticle and method for producing same
US8261577B2 (en) 2009-12-21 2012-09-11 3M Innovative Properties Company Method for making hollow microspheres
US9102560B2 (en) 2013-01-17 2015-08-11 Sibelco Asia Pte. Ltd. Charging load for making TFT glass and method of making same
JPH09278463A (en) 1997-10-28 application
DE69702801D1 (en) 2000-09-21 grant
ES2150158T3 (en) 2000-11-16 grant
EP0801037A1 (en) 1997-10-15 application
JP3633091B2 (en) 2005-03-30 grant
EP0801037B1 (en) 2000-08-16 grant
DE69702801T2 (en) 2001-03-29 grant
US3597252A (en) 1971-08-03 Method for producing glass compositions
Mackenzie 1982 Glasses from melts and glasses from gels, a comparison
US4448599A (en) 1984-05-15 Hollow spheres produced from natural zeolites
Elmer 1991 Porous and reconstructed glasses
Bertrand et al. 2005 Spray-dried ceramic powders: A quantitative correlation between slurry characteristics and shapes of the granules
US4605428A (en) 1986-08-12 Sintered high-silica glass and articles comprising same
US2461011A (en) 1949-02-08 Carbon powder method of making glass beads
US3883336A (en) 1975-05-13 Method of producing glass in a flame
US3838998A (en) 1974-10-01 Process for forming hollow glass micro-spheres from admixed high and low temperature glass formers
US5069702A (en) 1991-12-03 Method of making small hollow glass spheres
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ARAI, KIYOTAKA;YAMADA, KENJI;HIRANO, HACHIRO;AND OTHERS;REEL/FRAME:008605/0969