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US 2014/0369918 A1Published application
Method and apparatus for production of silane and hydrohalosilanes
AssigneeREC Silicon Inc
InventorWilliam C. Breneman
Life of this patent
Estimating the term…
Abstract
Silane and hydrohalosilanes of the general formula HySiX4-y (y=1, 2, or 3) are produced by reactive distillation in a system that includes a fixed-bed catalytic redistribution reactor that can be back-flushed during operation.
Claims14
A system for producing silane and hydrohalosilanes, comprising:
- (a) a multi-zone fractional distillation column (1) comprising
- a vessel defining a plurality of distillation zones, having a reactant stream inlet (15) positioned in a lower portion of the column, a distillate stream outlet (14) positioned in an upper portion of the column, and a product stream inlet (3) positioned in a lower portion of the column;
- (b) a first catalytic redistribution reactor (6) comprising
- a vessel defining a chamber, the vessel having a first reactor lower port (8) positioned in a lower portion of the vessel and a first reactor upper port (9) positioned in an upper portion of the vessel, and
- a fixed-bed catalyst disposed within the chamber between the first reactor lower port (8) and the first reactor upper port (9), and
- a plurality of valves (10), (11), (12), (13), wherein when valves (10) and (12) are open and valves (11) and (13) are closed, the first reactor lower port (8) is in fluid communication with the product stream inlet (3) and the first reactor upper port (9) is in fluid communication with the distillate stream outlet (14), and when valves (11) and (13) are open and valves (10) and (12) are closed, then the first reactor lower port (8) is in fluid communication with the distillate stream outlet (14) and the first reactor upper port (9) is in fluid communication with the product stream inlet (3);
- (c) a second catalytic redistribution reactor (6a) comprising
- a vessel defining a chamber, the vessel having a second reactor lower port (8a) positioned in a lower portion of the vessel, and a second reactor upper port (9a) positioned in an upper portion of the vessel,
- a fixed-bed catalyst disposed within the chamber between the second reactor lower port (8a) and the second reactor upper port (9a), and
- a plurality of valves (10a), (11a), (12a), (13a), wherein when valves (10a) and (12a) are open and valves (11a) and (13a) are closed, the second reactor lower port (8a) is in fluid communication with the product stream inlet (3) and the second reactor upper port (9a) is in fluid communication with the distillate stream outlet (14), and when valves (11a) and (13a) are open and valves (10a) and (12a) are closed, then the second reactor lower port (8a) is in fluid communication with the distillate stream outlet (14) and the second reactor upper port (9a) is in fluid communication with the product stream inlet (3);
- and
- a pump (4) positioned downstream from the distillate stream outlet (14) and upstream from the first catalytic redistribution reactor (6) and the second catalytic redistribution reactor (6a).
9 more elements
A method for producing silane and hydrohalosilanes, comprising:
- passing a reactant stream (A) comprising one or more hydrohalosilanes of formula HySiX4-y where X is a halogen and y is 1, 2, or 3 into a multi-zone fractional distillation column (1) comprising a vessel defining a plurality of distillation zones, wherein the reactant stream (A) is passed into the multi-zone fractional distillation column (1) through a reactant stream inlet (15) positioned in a lower portion of the column (1);
- pumping a distillate (B) from the multi-zone fractional distillation column (1) via a distillate stream outlet (14) positioned in an upper portion of the column (1) through (i) a first catalytic redistribution reactor (6) comprising a vessel defining a chamber, a fixed-bed catalyst disposed within the chamber, a first reactor lower port (8) positioned in a lower portion of the first reactor, and a first reactor upper port (9) positioned in an upper portion of the first reactor (6), and (ii) a second catalytic redistribution reactor (6a) comprising a vessel defining a chamber, a fixed-bed catalyst disposed within the chamber, a second reactor lower port (8a) positioned in a lower portion of the second reactor (6a), and a second reactor upper port (9a) positioned in an upper portion of the second reactor (6a), thereby routing a first portion of the distillate (B) into the first catalytic redistribution reactor (6) via the first reactor upper port (9) and routing a first portion of a product stream (C) out of the first catalytic redistribution reactor (6) via the first reactor lower port (8), and further routing a second portion of the distillate (B) into the second catalytic redistribution reactor (6a) via the second reactor lower port (8a) and routing a second portion of the product stream (C) out of the second catalytic redistribution reactor (6a) via the second reactor upper port (9a), thereby back-flushing the second catalytic redistribution reactor (6a);
- and
- flowing the product stream (C) into the multi-zone fractional distillation column (1) via a product stream inlet (3) positioned in a lower portion of the multi-zone fractional distillation column (1).
1 more element
Dependencies are inferred from the claim text.