A compound inducer for in situ template-induced synthesis of nano-calcium carbonate and its application

Abstract

The invention discloses a composite inducer for synthesizing nano-calcium carbonate induced by an in-situ template and its application, wherein the composite inducer is composed of sodium D-gluconate, polyethylene glycol and sodium polyphosphate, and the mass ratio is It is 1:1~3:3~5. CaCl 2 The mixed solution with ammonia water is placed in a normal pressure reactor, a compound inducer is added, and CO is introduced at a certain temperature 2 , stirring the reaction, when the pH value of the reaction solution reaches a certain value, stop feeding CO 2 ; Solid-liquid separation after the reaction, the resulting filtrate is NH 4 Cl solution, after evaporation, concentration and crystallization process, NH 4 Cl sample; the resulting filter cake was washed and dried to obtain nano-CaCO 3 sample. The present invention adopts higher Ca + concentration of CaCl 2 Preparation of Nano-CaCO from Solution 3 , and has multiple advantages such as mild process conditions, low equipment requirements, high production efficiency, and low cost of inducers.

Description

technical field [0001] The invention relates to a compound inducer for in-situ template-induced synthesis of nano-calcium carbonate and its application. CaCl 2 Mix solution with ammonia water as raw material, add compound inducer and pass CO 2 Preparation of Nano-CaCO 3 . Background technique [0002] At present, the total output of calcium carbonate in the world is about 80 million tons / year (including heavy and light calcium carbonate), and its production and application are mainly concentrated in the United States, China, Japan and Western Europe. my country's light CaCO 3 The total output is second only to the United States, ranking second in the world, and the production capacity has reached 4 million tons per year, of which the active CaCO 3 About 800,000 tons, ultra-fine nano-CaCO 3 About 500,000 tons. With the rapid development of the national economy and the continuous improvement of my country's product quality requirements for rubber, plastics, papermaking, ...

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Problems solved by technology

[0008] ① The product pursues miniaturization too much, and the development of refinement and functionalization is relatively lacking;

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