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US09550682B2 Process for preparing precipitated silicas 有权
沉淀二氧化硅的制备方法

  • Patent Title: Process for preparing precipitated silicas
  • Patent Title (中): 沉淀二氧化硅的制备方法
  • Application No.: US14367455
    Application Date: 2012-12-19
  • Publication No.: US09550682B2
    Publication Date: 2017-01-24
  • Inventor: Malika Clouin , Sylvaine Neveu
  • Applicant: RHODIA OPERATIONS
  • Applicant Address: FR Paris
  • Assignee: Rhodia Operations
  • Current Assignee: Rhodia Operations
  • Current Assignee Address: FR Paris
  • Priority: FR1104089 20111223; FR1200217 20120125
  • International Application: PCT/EP2012/076206 WO 20121219
  • International Announcement: WO2013/092745 WO 20130627
  • Main IPC: C01B33/12
  • IPC: C01B33/12 ;  C01B33/193
Process for preparing precipitated silicas
Abstract:
A silica production method comprising reacting a silicate with at least one acid, in which the acid used in at least one of the steps of the production method is a concentrated acid, preferably selected from the group consisting of sulfuric acid having a concentration of at least 80% by weight, in particular at least 90% by weight, acetic acid having a concentration of at least 90% by weight, formic acid having a concentration of at least 90% by weight, nitric acid having a concentration of at least 60% by weight, phosphoric acid having a concentration of at least 75% by weight, and hydrochloric acid having a concentration of at least 30% by weight.
Abstract(Chinese):

一种二氧化硅生产方法，包括使硅酸盐与至少一种酸反应，其中在制备方法的至少一个步骤中使用的酸是浓酸，优选选自浓度至少为的硫酸 80重量％，特别是至少90重量％，浓度为至少90重量％的乙酸，浓度为至少90重量％的甲酸，浓度为至少60重量％的硝酸， 的浓度为至少75重量％的磷酸和浓度为至少30重量％的盐酸。

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