What is silica gel desiccant

Introduction to silica gel desiccant
Silica gel desiccant is a highly active adsorption material, usually made by the reaction of sodium silicate and sulfuric acid, and a series of post-treatment processes such as aging and acid foaming of the desiccant. Silica gel is an amorphous substance, and its chemical formula is mSiO2. nH2o. It is insoluble in water and any solvents, non-toxic, tasteless, chemically stable, and does not react with any substances except strong alkalis and hydrofluoric acid. The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace with other similar materials. Silica gel desiccant has high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. This product is different kinds of silica gel packed in moisture-permeable pouches. The main raw material silica gel is a kind of hydrous silica with high microporous structure. It is non-toxic, odorless, odorless, chemically stable, and has strong moisture absorption properties. Therefore, it is widely used in the storage and transportation of instruments, meters, equipment, leather, bags, shoes, textiles, food, medicines, etc., to control the relative humidity of the environment to prevent items from being damp, mildew and rusty.
The safety performance of silica gel
The main component of silica gel is silica, which is chemically stable and non-toxic. Silica gel has a strong adsorption capacity and can produce a drying effect on human skin. Therefore, you should wear work clothes during operation. If silica gel gets into the eyes, rinse with plenty of water and seek medical treatment as soon as possible.
Quality index
Quality index conforms to HG/T2765-2005 Unit adsorption capacity: adsorption capacity ≥10% when RH=20% ≥20% when RH=40% ≥30% when RH=90% Note: According to GB10455-89 standard: Qualified product ≥28% when RH=90% First-class product ≥29% Superior product ≥30%
Main purpose
Using silica gel with strong adsorption, it can quickly absorb into the sealed package It has the characteristics of stable moisture, chemical properties, non-toxic and harmless; coupled with continuous innovation and development in recent years, various silica gels have been widely used in drug purification, DNA separation, food drying, high-precision electronics, cosmetics, sewage purification, and beer purification. , Paint and resin production or preservation. In our daily life and production and business activities, silica gel is often used in the following aspects: dry and mildew-proof packaging of precision optical instruments and electronic appliances; leather drying, such as placing in leather clothes, leather bags, and leather shoes to ensure dryness and quality Function: In terms of food drying, it is more common in biscuits and fried foods to ensure that the food is crispy; In terms of drying of medicines, they are placed in medicine bottles to ensure the prolonged shelf life of medicines; Container drying: The shipping containers are in different latitudes It will form "internal rain" in the box. If you use silica gel desiccant, it can absorb water equivalent to its own weight, which can reduce the dew point and cause condensation in the container during the process of ocean transportation for up to 50 days. Get under control. Hotel-use items, such as placed in the closet, shoes and under the bed, absorb various peculiar smells and keep the air dry and fresh.
Packaging specifications of silica gel desiccant
Common specifications: 1g, 2g, 3g, 5g, 10g, 20g, 30g       Packing: inner lined with plastic bag closed, outer corrugated box, each package With humidity indicator card (RH10%±5%)
1. Fine-pored silica gel desiccant:
The appearance of the product is white, translucent glass body. Mainly used for drying, moisture-proof, can be used as catalyst carrier and dehydration refining of organic compounds. Because of its high bulk density and obvious moisture absorption effect under low humidity. It can be used as an air purifier to remove moisture from the air to control air humidity. It is also widely used in sea transportation, and can also be used as a dehumidification between two parallel sealed glass plates, which can maintain the transparency of the glass.
2. Coarse-pored silica gel desiccant:
The appearance of coarse-pored silica gel desiccant is white. There are three types: block, spherical and micro-spherical. The moisture absorption effect is more obvious in the environment of higher relative humidity. It is commonly used as dehydrating agent, desiccant, catalyst carrier, and can remove organic acid and water in transformer insulating oil. In addition, because of its large pore size, it is also a raw material for further processing of silica gel. 3. Blue Gum Desiccant:       Blue Gum Desiccant This product has a highly pore structure. Blue, translucent, its color changes from blue to light red upon moisture absorption. It can be mixed with general fine-pored spherical silica gel and used as an indicator to indicate the degree of water saturation of the desiccant. It is mainly used for drying and moisture absorption.
4. Cobalt-free discoloration silica gel desiccant:
Cobalt-free discoloration silica gel desiccant The appearance of cobalt-free discoloration silica gel desiccant is orange or translucent glassy particles, which has strong moisture absorption capacity and is in the process of moisture absorption. Its appearance color will change significantly with the increase of moisture absorption. Cobalt-free discoloring silica gel desiccant can be used alone or in combination with fine-pored silica gel (the proportion is 5% or higher). When it is not damp, it is orange, and gradually turns to light green after absorbing moisture. When it continues to absorb moisture and turns to dark green, it needs to be replaced with a new silica gel or reused. Cobalt-free discoloration silica gel desiccant is environmentally friendly without cobalt chloride and is a substitute for blue silica gel. Specification: 1-3mm 2-4mm 2-5mm 3-5mm 4-8mm Packing: 20 or 25kg/bag
5. Silica gel desiccant (cat litter):
Silica gel desiccant (cat litter) silica gel (Cat litter), also known as silica sand, is an ideal pet waste cleaner. The basic ingredient is silicon dioxide. It is safe for household use and can quickly absorb urine and peculiar smells discharged by pets and keep it dry.