Production method of attapulgite suspending agent

Abstract

The invention discloses a production method of an attapulgite suspending agent. The production method comprises the following steps: purification of attapulgite clay: firstly simply airing attapulgite raw ores, washing, filtering, and drying filtrate, so as to remove large-particle-size impurities such as opals, carbonate and silicate in the attapulgite raw ores; acidizing treatment: replacing aluminum ions, magnesium ions, sodium ions and the like in internal nano-ducts of the attapulgite clay with hydrogen ions of sulfuric acid, so as to further improve adsorptivity and caking property of the attapulgite clay; and preparation of the suspending agent: mixing acid-base-resistant silicon dioxide, a phase transfer catalyst tetrabutylammonium bromide and a thickening agent sodium carboxymethylcellulose, and carrying out ultrasonic treatment, so as to obtain the suspending agent. The production method of the attapulgite suspending agent has the beneficial effects that a production process is simple, and the prepared suspending agent has good anti-settling effect, proper viscosity and excellent adsorptivity and caking property and is suitable for being used as a suspending agent of coatings.

Description

technical field [0001] The invention relates to the field of suspending agents, in particular to a production method of an attapulgite suspending agent. Background technique [0002] Attapulgite refers to a clay mineral with attapulgite as the main component. It is widely distributed all over the world. It is abundant in Jiangsu and Anhui in my country. It is a crystalline hydrated magnesium aluminum silicate mineral with unique properties. Layer chain structure features, containing Na + , Ca 2+ , Fe 3+ 、Al 3+ , The crystals are needle-like, fibrous or fibrous aggregates. The crystal structure is nano-bundle, with an average length of 800-1000nm and a width of 30-40nm. The nano-bundle structure of attapulgite has a large specific surface area and special physical and chemical properties and technological properties such as high temperature resistance and salt-alkali resistance, so it is widely used in fluid modifiers, fertilizer suspensions, adsorbents, catalytic carrier...

AI Technical Summary

Problems solved by technology

However, due to the high surface activity of attapulgite, attapulgite is easy to agglomerate to form piled bundles, which reduces its own dispersion performance and limits its application.

[0003] In recent years, among the commonly used suspending agents for coatings, organic bentonite has the most ideal suspending property, but the anti-sedimentation effect of organic bentonite is poor, and its initiator xylene is not friendly to the environment

In addition, the raw materials of bentonite are relatively expensive and costly, and high-quality bentonite resources are also tending to be exhausted