Granular mineral chlorine-free drying agent

Abstract

The invention discloses a granular mineral chlorine-free drying agent. The key points of the technical scheme are that: the granular mineral chlorine-free drying agent consists of red bentonite, dolomite attapulgite clay, bauxite, sulfuric acid, high-viscosity attapulgite clay powder and sodium aluminate. A production method for the granular mineral chlorine-free drying agent comprises the following steps of: mixing red bentonite, dolomite attapulgite clay, and bauxite and acidizing, and stirring and mixing the acidized mixture and high-viscosity attapulgite clay powder, tabletting, performing heat treatment, crushing the mixture which is subject to heat treatment and sodium aluminate together, and packaging to obtain the granular mineral chlorine-free drying agent. The granular mineral chlorine-free drying agent is large in a static water adsorption amount, does not contain chlorine, is non-toxic, tasteless and environment-friendly and does not have contact corrosivity. The granular mineral chlorine-free drying agent can be placed in various packaging bags, is suitable for preventing instruments and meters, electrical equipment, electronic products, medicines, foods, textiles, leather, shoes, clothes and various packaged products from being damped and mildewed or corroded.

Description

technical field [0001] The invention relates to a desiccant, in particular to a granular mineral chlorine-free desiccant. Background technique [0002] Mineral desiccants mainly include montmorillonite desiccant and attapulgite desiccant. The appearance of montmorillonite desiccant is broken, easy to pulverize, and expand after absorbing moisture. The moisture absorption rate of attapulgite desiccant can be adjusted, and the appearance is spherical, but It contains chloride ions, which have contact corrosion to metal products. Although the existing chlorine-free desiccants on the market do not add chlorine ion-containing substances, their static water adsorption is less than 20%, which is lower than the relevant desiccant standards. [0003] Chinese Patent Authorization Announcement No. CN 100562498C, date of authorized announcement November 25, 2009, titled "Method for Treating Industrial Waste Acid with Dolomite Attapulgite Clay and Preparation of Desiccant", discloses a "...

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Problems solved by technology

[0004] The disadvantages of the above-mentioned patents are: (1) Simply adding attapulgite clay powder containing dolomite to the waste acid solution and calcining to obtain attapulgite clay composite desiccant, the static water adsorption in 24 hours is less than 20%; (2) attapulgite clay In clay mining, dolomite attapulgite clay is a complete mineral, and dolomite and attapulgite clay cannot be separated into individual monomers. Therefore, the above-mentioned patent "in the dolomite-containing attapulgite clay , by weight percentage, containing 10-60% of dolomite and 40-90% of attapulgite clay", which cannot be realized in actual production