Process for preparing crystal seed used for rutile type titanium dioxide production
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- 湖南永利化工股份有限公司
- Publication Date
- 2005-03-16
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention relates to a production method of rutile titanium dioxide, in particular to a preparation method of calcined seed crystals for production of rutile titanium dioxide. Background technique
[0002] One of the key technologies in the sulfuric acid production process of rutile titanium dioxide lies in the preparation of the secondary seed crystal, that is, the calcined seed crystal. The calcined crystal seed is a rutile crystal accelerator for the crystal transformation of metatitanic acid during the calcination process. It can reduce the temperature required for the rutile crystal transformation, improve the color-removing power of the product, improve the particle shape of titanium dioxide during calcination, and make the particles smooth Regular, soft and not easy to sinter.
[0003] The commonly used calcined seed crystal preparation process generally has the following steps: alkali boiling reaction, dilution hydrolysis, washing and impu...