Two-stage method for separating and refining diatomaceous earth

A technology of refining diatomite and two-step method, which is applied in the field of two-step separation and refining of diatomite, which can solve the problems of environmental pollution, difficult recovery, fluorine ion entry, etc.
CN1465525AInactive Publication Date: 2004-01-07INST OF SOIL SCI CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF SOIL SCI CHINESE ACAD OF SCI
Publication Date
2004-01-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for preparing high quality infusorial earth by washing the medium-low grade infusorial earth in water and acid successively. It includes adding oxalate or phosphate as a reductive dispersant in infusorial earth, stirring strongly / digesting / ultrasonic dispersing; washing with water firstly to remove clay impurity and sulfuric acid secondary to remove iron-aluminium oxide. The product canbe used as the material of catalyst carrier.
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Description

technical field

[0001] The invention belongs to the technical field of separation and purification of diatomite, and relates to a new method suitable for diatomite of various grades to be refined into high-grade products through water washing-acid washing step by step, in particular to a method suitable for diatomite containing clay and other impurities. A two-step method for separating and refining high-grade diatomite into high-grade products. Background technique

[0002] Diatomite has a wide range of uses in industrial and agricultural production, especially high-grade diatomite is an important chemical raw material, such as high-purity diatomite can be used as a catalyst carrier. But not all diatomite with high purity can be used as catalyst carrier. According to the existing research results, only high-purity diatomite mainly composed of straight-chain algae can produce high-quality catalysts. my country's Jilin Changbai diatomite although SiO 2 The content is high a...

Claims

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