Title:
PRECIPITATED SILICON DIOXIDE FOR GREEN TIRE AND PREPARATION METHOD FOR PRECIPITATED SILICON DIOXIDE
Document Type and Number:
WIPO Patent Application WO/2023/035099
Kind Code:
A1
Abstract:
The present application relates to precipitated silicon dioxide for a green tire and a preparation method for the precipitated silicon dioxide. The preparation method comprises the following steps: adding ammonia water into a mixed solution of fluosilicic acid and sodium silicate for treatment to obtain first slurry; mixing the obtained first slurry with an ammonium salt solution for treatment to obtain second slurry; mixing the obtained second slurry with ammonia water for treatment, performing solid-liquid separation once every time the pH value is decreased by 0.2-0.5 in the treatment, then adjusting the pH value of a filtrate to a preset pH value, and continuously treating till no precipitate is formed then to mix a solid phase obtained by the solid-liquid separation to obtain the precipitated silicon dioxide for the green tire. By improving the composition of raw material liquid and using a mode of multiple times of treatment in the treatment process, the preparation of the high-performance precipitated silicon dioxide is achieved, the wear resistance of the obtained precipitated silicon dioxide is 0.18-0.3 cm3/1.6 km, and the tear strength is 150-180 kN/m.
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Inventors:
CHEN NANFEI (CN)
LU AIPING (CN)
WANG MINGHE (CN)
CHEN CHEN (CN)
CHEN JIASHU (CN)
SHI TONG (CN)
LU AIPING (CN)
WANG MINGHE (CN)
CHEN CHEN (CN)
CHEN JIASHU (CN)
SHI TONG (CN)
Application Number:
PCT/CN2021/116857
Publication Date:
March 16, 2023
Filing Date:
September 07, 2021
Export Citation:
Assignee:
WUXI HENGCHENG SILICON IND CO LTD (CN)
International Classes:
C01B33/12
Foreign References:
| CN103265036A | 2013-08-28 | |||
| CN1515493A | 2004-07-28 | |||
| CN112520744A | 2021-03-19 | |||
| CN1276341A | 2000-12-13 | |||
| CN102417636A | 2012-04-18 | |||
| CN107902673A | 2018-04-13 |
Other References:
YANG, HUACHUN: "Study on a new preparation technology of silica from by-product hydrofluosilicic acid", WUJIYAN-GONGYE = INORGANIC CHEMICALS INDUSTRY, TIANJIN HUAGONG YANJIUSUO, CN, vol. 45, no. 10, 31 October 2013 (2013-10-31), CN , pages 33 - 35, XP009544259, ISSN: 1006-4990
SUN, ZHONGGUO: "Study on the Polymerization Theories of Silicic Midbody in Silicate Multi-Component System", CHINESE SELECTED DOCTORAL DISSERTATIONS AND MASTER'S THESES FULL-TEXT DATABASES (MASTER), ENGINEERING SCIENCE & TECHNOLOGY I, no. 06, 1 May 2011 (2011-05-01), CN, pages 1 - 61, XP009544317
SUN, ZHONGGUO: "Study on the Polymerization Theories of Silicic Midbody in Silicate Multi-Component System", CHINESE SELECTED DOCTORAL DISSERTATIONS AND MASTER'S THESES FULL-TEXT DATABASES (MASTER), ENGINEERING SCIENCE & TECHNOLOGY I, no. 06, 1 May 2011 (2011-05-01), CN, pages 1 - 61, XP009544317
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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