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    • 6. 发明授权
    • Method for preparing precipitated silica
    • 沉淀二氧化硅的制备方法
    • US09567230B2
    • 2017-02-14
    • US13394320
    • 2010-09-02
    • Emmanuelle Allain
    • Emmanuelle Allain
    • C01B33/193
    • C01B33/193
    • The invention relates to a method for preparing precipitated silica, consisting in: (i) forming a starter having a pH of between 2 and 5; (ii) simultaneously adding silicate and acid, such that the pH of the reaction medium is between 2 and 5; (iii) adding silicate until the pH is between 7 and 10; (iv) simultaneously adding silicate and acid, such that the pH is between 7 and 10; (v) adding acid until the pH is between 2.5 and 5.3; (vi) bringing the reaction medium into contact with the acid and the silicate, such that the pH is between 2.5 and 5.3; and (vii) adding silicate, such as to increase the pH to a value between 4.7 and 6.3.
    • 本发明涉及一种制备沉淀二氧化硅的方法,该方法包括:(i)形成pH为2至5的起始物; (ii)同时加入硅酸盐和酸,使得反应介质的pH在2和5之间; (iii)加入硅酸盐直到pH值在7和10之间; (iv)同时加入硅酸盐和酸,使得pH在7和10之间; (v)加入酸直到pH在2.5和5.3之间; (vi)使反应介质与酸和硅酸盐接触,使得pH在2.5和5.3之间; 和(vii)添加硅酸盐,例如将pH增加到4.7至6.3之间的值。