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Reactor for producing large particles of materials from gases

Flagan, Richard C. and Alam, Mohammed K. (1987) Reactor for producing large particles of materials from gases. Patent number: US 4,642,227.

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A method and apparatus is disclosed for producing large particles of material from gas, or gases, containing the material (e.g., silicon from silane) in a free-space reactor comprised of a tube (20) and controlled furnace (25). A hot gas is introduced in the center of the reactant gas through a nozzle (23) to heat a quantity of the reactant gas, or gases, to produce a controlled concentration of seed particles (24) which are entrained in the flow of reactant gas, or gases. The temperature profile (FIG. 4) of the furnace is controlled for such a slow, controlled rate of reaction that virtually all of the material released condenses on seed particles and new particles are not nucleated in the furnace. A separate reactor comprised of a tube (33) and furnace (30) may be used to form a seed aerosol which, after passing through a cooling section (34) is introduced in the main reactor tube (34) which includes a mixer (36) to mix the seed aerosol in a controlled concentration with the reactant gas or gases.

Item Type:Patent
Related Patents:US06572604, US19840572604, 409941
Patent Classification:Current U.S. Class: 423/349; 118/716; 136/261; 422/150; 422/158; 423/350; 438/478. Current CPC Class: B01J 6/008 (20130101); B01J 19/0013 (20130101); C30B 15/002 (20130101); C01B 33/027 (20130101); C01B 33/029 (20130101); B01J 2219/00123 (20130101). Current International Class: B01J 6/00 (20060101); B01J 19/00 (20060101); C01B 33/00 (20060101); C01B 33/029 (20060101); C01B 33/027 (20060101); C30B 15/00 (20060101); C01B 033/02 ().
Patent Assignee:California Institute of Technology
Related URLs:
URLURL TypeDescription Patents site Patent Office (European Patent Office)
Flagan, Richard C.0000-0001-5690-770X
Alam, Mohammed K.0000-0003-4157-832X
Additional Information:Publication number US4,642,227. Publication type Grant. Application number 06/572,604. Publication date February 10, 1987. Filing date Jan 20, 1984. Priority date Aug 20, 1982. Government interests: The invention described herein was made in the performance of work under a NASA contract and is subject to the provisions of Section 305 of the National Aeronautics and Space Act of 1958, Public Law 85-568 (72 Stat. 435; 42 USC 2457). Parent case: This application is a continuation-in-part of application Ser. No. 06/409,941, filed Aug. 20, 1982, now abandoned.
Funding AgencyGrant Number
Record Number:CaltechAUTHORS:20150909-094956494
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60116
Deposited By: Irina Meininger
Deposited On:02 Dec 2015 18:14
Last Modified:09 Mar 2020 13:18

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