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无机硅胶

网址:  2019-02-01  作者:admin    阅读:

无机硅胶是一种高活性吸附材料,通常是用硅酸钠和硫酸反应,并经老化、酸泡等一系列后处理过程而制得。硅胶属非晶态物质,其化学分子式为mSiO2 .nH2O。不溶于水和任何溶剂,无毒无味,化学性质稳定,除强碱、氢氟酸外不与任何物质发生反应。各种型号的硅胶因其制造方法不同而形成不同的微孔结构。硅胶的化学组份和物理结构,决定了它具有许多其它同类材料难以取代的特点:吸附性能高、热稳定性好、化学性质稳定、有较高的机械强度等,家庭用做干燥剂,湿度调节剂,除臭剂等;工业用作油烃脱色剂,催化剂载体,变压吸附剂等;精细化工用分离提纯剂,啤酒稳定剂,涂料增稠剂,牙膏摩擦剂,消光剂等。

Inorganic silica gel is a highly active adsorption material, which is usually prepared by reaction of sodium silicate with sulfuric acid and a series of post-treatment processes such as aging and acid bubbles. Silica gel belongs to amorphous substance and its chemical formula is mSiO 2.nH 2. It is insoluble in water and famenb.89ix.comqiexiaoyou.89ix.comjiareguant.89ix.comkongzhiqiz.89ix.comguolvmian.89ix.comfeibiaom

en.89ix.comany solvents, non-toxic and tasteless, stable in chemical properties, and does not react with any substance except strong alkali and hydrofluoric acid. Different types of silica gels have different microporous structures because of their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics that other similar materials are difficult to replace: high adsorption performance, good thermal stability, chemical stability, high mechanical strength, household use as desiccant, humidity regulator, deodorant, industrial use as oil hydrocarbon decolorizer, catalyst carrier, pressure swing adsorbent, etc. Beer stabilizer, paint thickener, toothpaste friction agent, extinction agent, etc.

硅胶根据其孔径的大小分为:大孔硅胶、粗孔硅胶、B型硅胶、细孔硅胶。由于孔隙结构的不同,因此它们的吸附性能 各有特点。粗孔硅胶在相对湿度高的情况下有较高的吸附量,细孔硅胶则在相对湿度较低的情况下吸咐量高于粗孔硅胶,而B型硅胶由于孔结构介于粗、细孔之间,其吸附量也介于粗、细孔之间。
Silica gel can be divided into macroporous silica gel, coarse porous silica gel, B type silica gel and fine porous silica gel according to its pore size. Because of the different pore structure, their adsorption properties have their own characteristics. Coarse-porous silica gel has higher adsorption capacity in the case of high relative humidity, while fine-porous silica gel has higher adsorption capacity in the case of low relative humidity than coarse-porous silica gel, while B-type silica gel has the adsorption capacity between coarse and fine pore due to its pore structure.
无机硅胶根据其用途 ,还可以分为啤酒硅胶、变压吸附硅胶、医用硅胶、变色硅胶、硅胶干燥剂、硅胶开口剂、牙膏用硅胶等。
According to its use, inorganic silica gel can also be divided into beer silica gel, pressure swing adsorption silica gel, medical silica gel, discolored silica gel, silica gel desiccant, silica gel opener, toothpaste silica gel and so on.

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