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Method for removing metal ions in organic silicon

A metal ion and organosilicon technology, applied in the fields of silicon organic compounds, fractionation, distillation adjustment/control, etc., can solve the problems of difficult removal of metal ions and high removal cost, and achieve uniform heating, fast evaporation rate, and improved performance.

Pending Publication Date: 2020-02-14
张继
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to make up for the deficiencies of the prior art and solve the problem that metal ions in organosilicon are difficult to remove and the cost of removal is high, the invention proposes a method for removing metal ions in organosilicon

Method used

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  • Method for removing metal ions in organic silicon
  • Method for removing metal ions in organic silicon
  • Method for removing metal ions in organic silicon

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Embodiment approach

[0032] As an embodiment of the present invention, a stirring shaft 12 is rotatably connected to the bottom of the inner cavity of the rectifying tank body 1; a first cavity 13 is opened inside the stirring shaft 12; the bottom of the rectifying tank body 1 is fixedly connected to There is an air pump 14; the air outlet of the air pump 14 runs through the rectification tank 1 and communicates with the first cavity 13; the surface of the stirring shaft 12 is provided with uniformly arranged air injection ports 15; the air injection ports 15 are connected to the first cavity 13 A cavity 13 is connected; when working, the air pump 14 is energized first, so that the air outlet on the stirring shaft 12 continuously ejects cold air, and then the mixed solution is passed into the rectification tank 1, and the stirring shaft 12 The ejected airflow can further stir the mixed solution, so that the components in the mixed solution can be mixed more evenly. At the same time, when the soluti...

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Abstract

The invention belongs to the technical field of preparation of chemical products, and particularly relates to a method for removing metal ions in organic silicon. A device of the method comprises a distillation tank body, a condensate pipe and a heating plate; the heating plate is poured on the side wall of the bottom of the distillation tank body; the top of a rectification tank body is fixedly connected with a feeding pipe; one side of the rectification tank body is fixedly connected with the condensate pipe; a partition plate is fixedly connected to an inner cavity of the condensate pipe todivide the inner cavity of the condensate pipe into a first pipeline and a second pipeline; the second pipeline is communicated with the inner cavity of the rectification tank body; an air hole is formed in the partition plate to communicate the first pipeline with the second pipeline; double outlet design of the condensate pipe is adopted; a collecting box is mounted at an outlet of the first pipeline; an outlet of the second pipeline is communicated with the inner cavity of the rectification tank body. The heating plate is used for heating the wall of the rectification tank body so as to indirectly heat a solution, the solution is boiled and evaporated, and the impurity-containing steam and the pure organic silicon steam are separated by utilizing the difference of boiling points, so that a pure organic silicon solution is collected.

Description

technical field [0001] The invention belongs to the technical field of preparation of chemicals, in particular to a method for removing metal ions in organosilicon. Background technique [0002] High-purity siloxane is widely used in the electronics industry, and its purification process mainly includes the removal of organic impurities, metal ions, and solid particles. Among them, the removal of metal ions is more difficult. Especially for siloxane used in high-end chips, its metal ion content is required to be controlled within 10ppb. [0003] For example, in the U.S. Patent Document No. US20050054211A1, a method and system for purifying organic silicon using an absorption tower are disclosed, which absorb liquid organic silicon (including cyclopolysiloxane, Such as organic impurities and metal ions in octamethylcyclotetrasiloxane), thereby purifying organosilicon; and, in order to improve the purity, impurities in organosilicon can be further filtered through a filter u...

Claims

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Application Information

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IPC IPC(8): C07F7/21B01D3/42B01D3/14
CPCC07F7/21B01D3/14B01D3/42
Inventor 不公告发明人
Owner 张继
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