# US 2021/0275965 A1 · Apparatus for removing boron

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- Number: US 2021/0275965 A1
- Document ID: US20210275965A1
- Status: Published application
- Kind: A1
- Application number: 17/327,131
- Filed: 2021-05-21
- Published: 2021-09-09
- Earliest claimed: 2017-12-07
- Assignees: Industrial Technology Research Institute
- Applicants: Industrial Technology Research Institute
- Inventors: Ta-Ching HSIAO; Chu-Pi JENG; Kuo-Lun HUANG; Mu-Hsi SUNG; Keng-Yang CHEN; Li-Duan TSAI
- Web page: https://patentgrep.com/patent/US20210275965A1

## CPC

- B01D 53/46: Removing components of defined structure
- B01J 3/006: {Processes utilising sub-atmospheric pressure; Apparatus therefor}
- B01J 8/0095: {in which two different types of particles react with each other}
- B01J 8/0278: {Feeding reactive fluids (for solid material B01J8/0015)}
- C01B 32/20: Graphite
- C01B 32/97: Preparation from SiO or SiO2
- C01B 32/984: Preparation from elemental silicon
- C01B 35/023: {Boron}
- B01D 2257/10: Single element gases other than halogens
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}

## Abstract

A method for removing boron is provided, which includes (a) mixing a carbon source material and a silicon source material in a chamber to form a solid state mixture, (b) heating the solid state mixture to a temperature of 1000° C. to 1600° C., and adjusting the pressure of the chamber to 1 torr to 100 torr. The method also includes (c) conducting a gas mixture of a first carrier gas and water vapor into the chamber to remove boron from the solid state mixture, and (d) conducting a second carrier gas into the chamber.

## Claims

### Claim 1

An apparatus for removing boron, comprising:
a chamber for containing a solid state mixture of a carbon source material and a silicon carbon source;
a carrier gas source for transferring a first carrier gas to the chamber; and
a humidifier connected to the chamber for transferring a gas mixture of a second carrier gas and water vapor to the chamber,
wherein the humidifier comprises:
a body for containing water;
a first heating element at a bottom of the body for heating the water to form the water vapor;
an inlet pipe for conducting the second carrier gas into the water to form the gas mixture of the second carrier gas and the water vapor;
an outlet pipe for transferring the gas mixture of the second carrier gas and the water vapor into the chamber; and
a liquid level meter connected to the body and disposed at a side of the body for detecting water level in the body.

### Claim 2 (depends on 1)

The apparatus as claimed in claim 1, wherein the humidifier further comprises a first temperature controller for controlling water temperature in the body.

### Claim 3 (depends on 1)

The apparatus as claimed in claim 1, wherein the humidifier further comprises:
a second heating element at a top of the body for heating the top of the body; and
a second temperature controller for controlling a top temperature of the body.

### Claim 4 (depends on 1)

The apparatus as claimed in claim 1, wherein the humidifier further
a third heating element at a side of the outlet pipe for heating the outlet pipe; and
a third temperature controller for controlling outlet pipe temperature.

### Claim 5 (depends on 1)

The apparatus as claimed in claim 1, wherein the inlet pipe, the outlet pipe, or a combination thereof is a movable pipe.

### Claim 6 (depends on 1)

The apparatus as claimed in claim 1, further comprising a gas monitor connected to the outlet pipe for monitoring flow rate of the gas mixture in the outlet pipe and monitoring a ratio between the second carrier gas and the water vapor in the gas mixture.

### Claim 7

The apparatus as claimed in 1, wherein the chamber is heated to a temperature of 1000° C. to 1600° C. under a pressure of 1 torr to 100 torr during the step of removing boron.