Compound of high-whiteness clay and preparation method thereof

Abstract

The invention discloses a compound of high-whiteness clay and a preparation method thereof. The preparation method is as follows: firstly adding titanium tetrachloride solution into clay slurry to dissolve out the developing elements in the clay in the form of ions; secondly, adding phosphoric acid water solution to load the phosphate precipitation and titanium phosphate precipitation of the developing elements on the surface of the clay; and finally adding silicate solution or aluminate solution to ensure generated silica or alumina to compound the clay once again to obtain the high-whiteness clay. The invention has low cost, simple operation and less environmental pollution.

Description

technical field

[0001] The invention relates to a compound of high-whiteness clay and a preparation method thereof, in particular to a method for synergistically whitening clay with phosphate, titanium phosphate and silicon dioxide or aluminum oxide. Background technique

[0002] Clay is a non-metallic mineral with large reserves and wide application range. However, natural clay minerals contain various impurities, and the existence of many color-developing elements (such as iron) makes the whiteness of clay low, so it cannot be obtained in high-end fields that require high whiteness, such as papermaking, paint, cosmetics, and polymer filling. Promotion and use. Chinese patent CN1884207A proposes a compound iron removal method of sodium oxalate and hydrochloric acid to improve the whiteness of attapulgite. This method has a lot of waste acid, which is easy to cause environmental pollution, and the whiteness of the product is not ideal. Chinese patent CN100529255C proposes ...