What can be used as food desiccant

Introduction: as a food desiccant, it mainly includes three categories, because it is an acid desiccant, and then an alkaline desiccant or a neutral desiccant The application of dryer is very wide Usually the desiccant we often contact is food desiccant, and there are many kinds of food desiccant, including acid desiccant, alkaline desiccant and neutral desiccant These different kinds of desiccants have different effects Now let's welcome Baibai safety net to introduce in detail what can be used as food desiccant? There are three types of commonly used desiccants: one is acid desiccant, including concentrated sulfuric acid, phosphorus pentoxide, silica gel, etc.; the second is alkaline desiccant, including solid caustic soda, lime and alkali lime (mixture of sodium hydroxide and calcium oxide), etc.; the third is neutral desiccant Such as anhydrous calcium chloride, anhydrous magnesium sulfate, etc the properties and uses of commonly used desiccants are as follows: 1 Concentrated H2SO4: strong water absorption, It is often used to remove the moisture in the gas that does not react with H2SO4 For example, it is often used as the desiccant of H2, O2, Co, SO2, N2, HCl, CH4, CO2, Cl2 and other gases 2 Anhydrous calcium chloride: widely used because of its low price and strong drying ability It has fast drying speed, can be regenerated, and its dehydration temperature is 473k It is generally used to fill the dryer and drying tower, It can not be used to dry ammonia, alcohol, amine, acyl, ketone, aldehyde, ester, etc, It is a good desiccant It is often used to dry organic reagents 4 Solid sodium hydroxide and alkali lime: fast water absorption, high efficiency, low price, it is an excellent desiccant, But it can not be used to dry acid substances It is often used to dry gases such as hydrogen, oxygen and methane 5 Discolored silica gel: it is commonly used to keep the instrument and balance dry After absorbing water, it turns red The invalid silica gel can be reused after drying and regeneration It can dry amine, NH3, O2, N2, etc 6 Active aluminum oxide (Al2O3): large water absorption, fast drying speed, It can regenerate (400-500k baking) 7 Anhydrous sodium sulfate: the drying temperature must be controlled within 30 ℃, and the dryness is worse than anhydrous magnesium sulfate 8 Calcium sulfate: it can dry H2 O2 CO2 Co, N2 Cl2, HCl, H2S, NH3, CH4, etc note: anhydrous copper sulfate (CuSO4) (anhydrous copper sulfate turns white) also has certain dryness, And after absorbing water, it becomes blue copper sulfate pentahydrate (CuSO4.5H2O), but it is generally not used as a desiccant To sum up, "what can be used as food desiccant?" as mentioned here today, the application of desiccant is actually to remove the excess water in the food packaging bag, prevent the food from deteriorating, and prevent the growth of microorganisms Because the desiccant is in the food packaging bag, we must pay attention to safety and hygiene To learn more about food additives and food safety, you can directly log in to Baibai safety net Editor in charge: he xianrob