Method for producing potassium titanate

Patent metadata

Field	Value
Publication number	US-9796598-B2
Application number	US-201414777972-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 18, 2013
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A method for producing a potassium titanate easily and inexpensively produces a potassium titanate that exhibits high thermal stability and has a significantly low fibrous potassium titanate content. The method for producing a potassium titanate includes calcining a raw material mixture by heating the raw material mixture to a maximum calcination temperature that exceeds 1000° C. while controlling the heating rate from 1000° C. to the maximum calcination temperature to 15° C./min or less to obtain a calcine, and cooling the calcine while controlling the cooling rate from the maximum calcination temperature to 500° C. to 100° C./min or more, followed by grinding, the raw material mixture including a titanium compound and a potassium compound so that the molar ratio (number of moles of titanium compound on a titanium atom basis/number of moles of potassium compound on a potassium atom basis) of the number of moles of the titanium compound on a titanium atom basis to the number of moles of the potassium compound on a potassium atom basis is 2.7 to 3.3.

First claim

The invention claimed is:

1. A method for producing a potassium titanate comprising calcining a raw material mixture by heating the raw material mixture to a maximum calcination temperature that exceeds 1000° C. while controlling a heating rate from 1000° C. to the maximum calcination temperature to 15° C./min or less to obtain a calcine, and cooling the calcine while controlling a cooling rate from the maximum calcination temperature to 500° C. to 100° C./min or more, followed by grinding, the raw material mixture comprising a titanium compound and a potassium compound so that a molar ratio (number of moles of titanium compound on a titanium atom basis/number of moles of potassium compound on a potassium atom basis) of the number of moles of the titanium compound on a titanium atom basis to the number of moles of the potassium compound on a potassium atom basis is 2.7 to 3.3, and wherein a columnar potassium titanate content in the potassium titanate is 80 to 100 mass %.

2. The method for producing a potassium titanate according to claim 1 , wherein the grinding is performed using a vibrating rod mill.

3. The method for producing a potassium titanate according to claim 1 , wherein a fibrous potassium titanate content in the potassium titanate is 3 mass % or less.

Assignees

• Toho Titanium Co Ltd

Inventors

• Hori Naomichi
• Yoshida Takuma

Classifications

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• B02C17/14

  Mills in which the charge to be ground is turned over by movements of the container other than by rotating, e.g. by swinging, vibrating, tilting {(mills provided with vibrators in general B02C19/16)} · CPC title

• C01G23/005 Primary

  Alkali titanates · CPC title