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公开(公告)号：JP2000119396A
公开(公告)日：2000-04-25
申请号：JP29604499
申请日：1999-10-19
Applicant: DOW CORNING
Inventor： HALM ROLAND LEE , KEITH QUENTIN HAYES
Abstract: PROBLEM TO BE SOLVED: To provide a method for removing particulate matter from a silicon- containing liquid compound. SOLUTION: This removing method comprises bringing a suspension comprising a non-conductive silicon-containing liquid compound and particulate matter having a dielectric constant different from that of the non-conductive silicon- containing liquid compound, into contact with a non-conductive filler substrate 8 in an electric field. Especially, the method is useful for the removal of the suspended particulate matter having 0.01-100 μm particle diameter from a silicon fluid.
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公开(公告)号：JPH10272354A
公开(公告)日：1998-10-13
申请号：JP7636598
申请日：1998-03-25
Applicant: DOW CORNING
Inventor： BISCHOFF TODD F , HALM ROLAND LEE , VAN KOEVERING DENNIS GENE
Abstract: PROBLEM TO BE SOLVED: To lower existing steam through a peripheral open route facing sideways and suppress the steam flow in the outside of a structurized packing to the minimum, by practically closing the peripheral aperture with a barrier membrane, in an structurized packing for gas-liquid contact comprising a flow route facing sideways having the peripheral aperture. SOLUTION: A plurality of structurized packings 2 to be vertically overlaid in a tower outer wall 1 are made of metals, plastics, or ceramics and have a flow route having sideways and having peripheral apertures and the peripheral apertures are so treated as to be closed by a barrier film 3. In the case multi- segments of the packings 2 are arranged in the tower outer wall 1, respective segments of the packing 2 are sealed by a wiper band 4 to the tower outer wall in the upper most part. The peripheral apertures of the flow routes facing sideways of the packing 2 are closed by attaching the barrier film 3 to non- closed and opposed sides of the tower outer wall, which are the surfaces of the packing 2.
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公开(公告)号：JPH10151368A
公开(公告)日：1998-06-09
申请号：JP31076197
申请日：1997-11-12
Applicant: DOW CORNING
Inventor： GATTI CHRISTOPHER DARREN , HALL CHARLES ALAN , HALM ROLAND LEE
Abstract: PROBLEM TO BE SOLVED: To effectively flocculate and settle a discontinuous phase from a continuous phase and to separate an emulsion into separate recoverable phases by incorporating a silicon-contg. compd. or a silicon-contg. polymer into the emulsion including the discontinuous phase and the nonconductive continuous phase and exposing the emulsion to an electric field. SOLUTION: The flow of the emulsion with the nonconductive continuous phase as a silicone fluid and the discontinuous phase as water is directed upward from a passage 3 along a passage 4 and sent to an electric field formed by electrodes 1 and 2. The emulsion is exposed to the electric field, then the flocculated waterdrop is moved downward along a passage 5, and the silicone fluid is sent upward along a transport passage 6. The water separated from the emulsion flowing along the passage 5 is collected as a bulky water 7 and discharged along a passage 8 while maintaining the water surface 9 at a specified position below the electrodes 1 and 2. One between the two phases, preferably the continuous phase of the silicone fluid, ia allowed to contain a silicon-contg. compd. or a silicon-contg. polymer.
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公开(公告)号：DE69631944D1
公开(公告)日：2004-04-29
申请号：DE69631944
申请日：1996-12-04
Applicant: DOW CORNING
Inventor： HALM ROLAND LEE , KUIVILA CHARLES SPENCER , WILDING OLIVER K
Abstract: A method is disclosed for controlling the direct process to vary the concentrations of trialkylhalosilanes and alkyltrihalosilanes in the final product. The method comprises contacting an alkyl chloride with silicon metalloid in the presence of a catalytic amount of a catalyst comprising 0.5 to 10 weight percent copper, 5 to 200 ppm tin, 25 to 2,500 ppm phosphorous and greater than zero to less than 50 ppm zinc, where the concentration of each of the catalyst components is based on the weight of silicon, at a temperature within a range of 250°C. to 400°C. We have surprisingly found that by so controlling zinc concentration, the concentrations of trialkylhalosilanes and alkyltrihalosilanes in the product can be varied.
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公开(公告)号：DE69531424D1
公开(公告)日：2003-09-11
申请号：DE69531424
申请日：1995-05-17
Applicant: DOW CORNING
Inventor： ALMQUIST CATHERINE LYNN BOTHE , DIAZ MICHAEL ANTHONY , HALM ROLAND LEE , HASLER JR , SMITH JAMES SCOTT
Abstract: A process for purifying halosilanes consisting of contacting a mixture comprising a halosilane and a hydrocarbon with an adsorbent selective for the hydrocarbon, thereby reducing the hydrocarbon content of the mixture. The present process is particularly useful for removing hydrocarbon contaminates from chlorosilanes, where the hydrocarbon contaminates have a boiling point similar to that of the chlorosilanes.
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Patent Agency Ranking
公开(公告)号：DE69429307T2
公开(公告)日：2002-08-14
申请号：DE69429307
申请日：1994-07-04
Applicant: DOW CORNING
Inventor： CHADWICK KIRK MICHAEL , HALM ROLAND LEE , DHAUL AJAY KUMAR , JOHNSON RICHARD GORDON
Abstract: A process for converting a high-boiling component resulting from the reaction of an organochloride with silicon into commercially desirable monosilanes is described. The process comprises contacting the high-boiling component with hydrogen gas at a temperature within a range of 250°C. to 1000°C. Process yield may be improved by use of a catalyst selected from activated carbon, platinum metal, platinum supported on alumina, palladium supported on carbon, SbCl₅, H₂PtCl₆, BCl₃, AlCl₃ and AlCl₃ supported on a support material selected from carbon, alumina and silica. A preferred embodiment of the process is run at a gauge pressure of 1.7 to 6.9 MPa (250 - 1000 psi). This process is preferential for the production of diorganodichlorosilane in relation to organotrichlorosilane in the monosilane product.
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公开(公告)号：DE69613320T2
公开(公告)日：2001-10-31
申请号：DE69613320
申请日：1996-11-28
Applicant: DOW CORNING
Inventor： DIAZ MICHAEL , HALM ROLAND LEE , MCINTYRE MICHAEL ANDREW , WILDING OLIVER K
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公开(公告)号：DE69426868D1
公开(公告)日：2001-04-19
申请号：DE69426868
申请日：1994-12-21
Applicant: DOW CORNING
Inventor： CHADWICK KIRK MICHAEL , KEYES BRIAN ROBERT , HALM ROLAND LEE
IPC: B01J23/14 , B01J23/825 , B01J23/835 , B01J27/138 , C01B33/107 , C07B61/00 , C07F7/08 , C07F7/12
Abstract: Chlorosilanes of formula RaHbSiCl(4-a-b) (I) are hydrogenated to a hydrosilane (II) in which 1 or more Cl atoms in (I) have been replaced by H by contact with Al and an H2 source (H2 gas or HCl gas) in the presence of a catalyst (Cu, Sn or Zn or cpds. of these or mixts.). In (I), R = 1-6C alkyl, a, b = 0-3 with a+b = 0-3. Pref. process is effected on (I; R = Me) on a continuous basis (esp. fluidised bed or packed-bed). Pref. catalysts comprise (all by wt. relative to Al) Cu at 0.1-20% (esp. CuCl), Sn at 1500-10000 esp. 3000-5000 ppm. Zn at 100-10000 ppm. or a mixt. of CuCl/Sn/Zn at 0.1-20% esp. 10-15%/1-2000 esp. 1500-2000 ppm/100-10000 esp. 3500-4200 ppm. respectively. The H2 source pref. provides at least 1 mol. of H2/mol. of (I). Pref. the Al/catalyst mixt. is preheated. The process is pref. at 1-100 esp. 1-15 atmos/300-450 esp. 325-375 deg.C (for H2) or 250-450 esp. 270-350 deg.C (for HCl). The pref. prods. are Me2SiHCl and Me3SiH.
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公开(公告)号：DE69414613T2
公开(公告)日：1999-07-22
申请号：DE69414613
申请日：1994-01-06
Applicant: DOW CORNING
Inventor： DAUGHERTY RICHARD DEWAYNE , HALM ROLAND LEE , KUIVILA CHARLES SPENCER
IPC: G01N31/00 , G01N33/20 , C01B33/037
Abstract: The present invention is a method for analyzing silicon for nonmetallic contaminants. The method comprises: (A) forming an alloy comprising silicon and a metal which promotes separation of nonmetallic contaminants present in the alloy, (B) separating the nonmetallic contaminants from the alloy, and (C) analyzing the separated nonmetallic contaminants for chemical content. The present invention is particularly useful for analyzing metallurgical grade silicon intended for use in the direct process for the production of organohalosilanes for the presence of oxides and carbides of calcium, aluminum and silicon.
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公开(公告)号：DE69418783D1
公开(公告)日：1999-07-08
申请号：DE69418783
申请日：1994-07-04
Applicant: DOW CORNING
Inventor： CHADWICK KIRK MICHAEL , JOHNSON RICHARD GORDON , DHAUL AJAY KUMAR , STEINMEYER ROBERT DAVID , HALM ROLAND LEE
IPC: C01B33/08 , C01B33/107 , C07F7/12 , C07F7/16
Abstract: The present invention is a process for converting a high-boiling component, resulting from the reaction of an organochloride with silicon, into more commercially desirable monosilanes. The process comprises contacting the high-boiling component with chlorine at a temperature within a range of 250°C. to 1000°C. Improved process yield of monosilanes is obtained by the use of a catalyst selected from alumina, silica, activated carbon, AlCl₃ and AlCl₃ supported on a support selected from alumina, silica and carbon.
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