Bubble size minimizing internals for fluidized bed reactors

Patent metadata

Field	Value
Publication number	US-9758384-B2
Application number	US-201414556590-A
Country	US
Kind code	B2
Filing date	Dec 1, 2014
Priority date	Dec 1, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

The present invention relates to internals useful for minimizing bubble size in a bubbling fluidized bed reactor. One use for the invention is in an apparatus and method for producing trichlorosilane in which metallurgical grade silicon is reacted with hydrogen chloride gas and while being fluidized by the hydrogen chloride gas, thereby producing trichlorosilane.

First claim

What is claimed is:

1. A reactor with internals for minimizing bubble size comprising:
a reactor with a top, a bottom, and walls between the top and the bottom defining an internal space;
a center support in the center of the reactor extending vertically from a bottom part of the reactor to a top part of the reactor;
a horizontal top support connected to the center support at the top part of the reactor;
a horizontal bottom support connected to the center support at the bottom part of the reactor;
a horizontal intermediate support connected to and rotatably adjustable on the center support between the horizontal top support and the horizontal bottom support; and
vertically extending internals selected from the group consisting of cables; chains; coils; cords; hinged rods; rods; springs; rods and chains or coils in a linear arrangement connected end to end; and an arrangement of any of the cables, chains, coils, cords, hinged rods, rods, and springs, connected together; extending among the horizontal top support, the horizontal intermediate support and the horizontal bottom support.

2. The reactor with internals for minimizing bubble size according to claim 1 , wherein the vertically extending internals are chains.

3. The reactor with internals for minimizing bubble size according to claim 1 , wherein the horizontal bottom support is connected to the reactor by a plurality of bolts each extending through an arm of the horizontal bottom support to a bolt support member connected to a reactor wall.

4. The reactor with internals for minimizing bubble size according to claim 1 , wherein the horizontal top support is connected to the reactor by a plurality of tapered guide pins each extending through arms of the horizontal top support from a location on a reactor wall.

5. The reactor with internals for minimizing bubble size according to claim 1 , wherein the center support is an all thread rod.

6. A method of minimizing bubble size in a fluidized bed reactor comprising:
providing a reactor with internals for minimizing bubble size comprising:
a reactor with a top, a bottom, and walls between the top and the bottom defining an internal space;
a center support in the center of the reactor extending vertically from a bottom part of the reactor to a top part of the reactor;
a horizontal top support connected to the center support at the top part of the reactor;
a horizontal bottom support connected to the center support at the bottom part of the reactor;
a horizontal intermediate support connected to and rotatably adjustable on the center support between the horizontal top support and the horizontal bottom support; and
vertically extending internals selected from the group consisting of cables; chains; coils; cords; hinged rods; rods; springs; rods and chains or coils in a linear arrangement connected end to end; and an arrangement of any of the cables, chains, coils, cords, hinged rods, rods, and springs, connected together; extending among the horizontal top support, the horizontal intermediate support and the horizontal bottom support,

supplying metallurgical grade silicon as a raw material to the reactor,
introducing hydrogen chloride gas to the reactor to react with the metallurgical grade silicon while the metallurgical grade silicon is fluidized by the hydrogen chloride gas and the metallurgical grade silicon and hydrogen chloride gas flow upward in the reactor, and
discharging gas containing trichlorosilane from a top part of the reactor.

Assignees

• Mitsubishi Polycrystalline Silicon America Corp (Mipsa)
• Mitsubishi Materials Corp

Inventors

• Nettles Bryan
• Colomb Matthias
• Deckbar Rick

Classifications

• B01J2208/0084

  inside the bed, e.g. baffles · CPC title

• B01J2208/00991

  Disengagement zone in fluidised-bed reactors · CPC title

• B01J8/1872

  Details of the fluidised bed reactor (B01J8/1836 takes precedence) · CPC title

• C01B33/10763 Primary

  from silicon · CPC title

• B01J2208/00938

  Flow distribution elements · CPC title