Process for producing high-purity electronic grade strontium carbonate

An electronic-grade strontium carbonate technology, which is applied in the field of preparation of high-purity electronic-grade strontium carbonate, can solve the problems of high performance requirements of reaction equipment, uneven particle size distribution, and high energy consumption in the reaction process, so as to reduce energy consumption and protect the environment Pollution, simple structure, and the effect of optimizing the production process
CN101508455AActive Publication Date: 2009-08-19仙桃市中星电子材料有限公司
5 Cites 4 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
仙桃市中星电子材料有限公司
Publication Date
2009-08-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention provides a method for preparing high-purity electronic grade strontium carbonate. The method comprises the following steps: dissolving strontium chloride into deionized water; adding mixture of strontium hydroxide accounting for 3 to 5 percent of the strontium chloride by weight and microbial flocculating agent MBFA9 into the deionized water; filtering the solution and removing impurities of the solution to be prepared into a strontium chloride with water for standby; slowly flowing a sodium hydroxide solution into the strontium chloride solution to react; pumping obtained strontium hydroxide solution into a carbonization reactor, and introducing pure carbon dioxide into the reactor to be carbonized to obtain strontium carbonate pulp; and drying and crushing the strontium carbonate pulp to obtain strontium carbonate powder. Compared with the prior process for producing the strontium carbonate, the method not only saves investment of high-temperature calcination equipment in production, but also greatly reduces energy consumption and pollution to environment, simplifies and optimizes production process, shortens reaction time, and ensures that the prepared strontium carbonate powder has the advantages of good dispersivity, high purity and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a production method of strontium carbonate, in particular to a preparation method of high-purity electronic grade strontium carbonate. Background technique

[0002] Electronic grade strontium carbonate is widely used in the production of various electronic components, and is an important raw material for the electronics industry. Such as PTC thermistors, ring varistors, MLCC multilayer ceramic capacitors, etc.; it can also be used in color TV glass bulbs, magnetic material iron In the production of strontium acid.

[0003] The traditional production process of strontium carbonate is as follows: pulverize lapis lazuli and carry out metathesis reaction with ammonium carbonate to obtain crude strontium carbonate, crude strontium carbonate and ammonium salt for transformation reaction, filter and remove slag, add ammonium carbonate for precipitation reaction, after filtration , the filter cake is dried and pulverized to obtain str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More