What climate needs to use desiccant and what is it used for?

Jinan: I should have it (for now).

Silica gel desiccant.

The most suitable hygroscopic environment for silica gel is room temperature (20 32) and high humidity (60 90%), which can reduce the relative humidity of the environment to about 40%, so silica gel desiccant has a wide range of applications.

Clay desiccant.

It is best used to absorb moisture in environments below 50 degrees. When the temperature is higher than 50, the clay"The degree of water release is greater than the degree of water absorption.

Zeolite desiccant.

Molecular sieve desiccant, which is a desiccant product synthesized and has strong adsorption of water molecules. The pore size of the molecular sieve can be controlled by different processing processes, in addition to adsorbing water vapor, it can also adsorb other gases. At a high temperature of more than 230 °C, it can still hold water molecules well (cannot be degraded).

Mineral desiccant.

Mineral desiccant is composed of several natural minerals and has an off-white appearance of small balls. It is non-toxic and harmless, and is a biodegradable and environmentally friendly desiccant. The moisture absorption rate is more than 50. Mineral desiccant Characteristics of mineral desiccant:

Mineral desiccant English name (activated clay), this product is refined from pure natural raw materials minerals and active hygroscopic agents, green and environmentally friendly, non-toxic and tasteless, no damage to the human body. **Low cost, fast adsorption speed, low preparation cost. Compared with other types of desiccant currently sold on the market, it not only has fast adsorption speed, high adsorption capacity, but also is non-toxic, tasteless, non-contact corrosive, and environmentally pollution-free, especially used in food packaging, which is harmless to the human body.

The so-called desiccant, of course, will be used in a humid climate, but it also depends on what kind of need, it is better to use, the weather in Jinan, geographically speaking, is humid!

It shouldn't be necessary when Jinan is hot and humid, and it will rain soon.

Desiccant effect:

Substances that remove water from moist substances are often divided into two categories: chemical desiccants, such as calcium sulfate and calcium chloride, are dried by combining with water to form hydrates. Physical desiccants, such as silica gel and activated alumina, are dried by physical adsorption of water.

The control of moisture is closely related to the yield of the product. In the case of food, under proper temperature and humidity, bacteria and moulds in food can multiply at an alarming rate, causing spoilage, moisture and discoloration. Electronic products can also cause metal oxidation due to excessive humidity, resulting in defective products.

The use of desiccant is to avoid the occurrence of defective products caused by excess moisture.

Physical adsorption: desiccant is suitable for preventing instruments, meters, electrical equipment, medicines, food, textiles and other packaging items from moisture, desiccant is also widely used in shipping, because the goods are often deteriorated due to high temperature during transportation, and the desiccant can effectively dehumidify and prevent moisture, so that the quality of the goods is guaranteed.

1. Desiccant is used for moisture-proof of bottled medicines and food. Ensure the dryness of the contents and prevent the growth of various miscellaneous molds.

2. The desiccant can be used as a general packaging desiccant for moisture-proofing.

3. The desiccant can be conveniently placed in the packaging of various items (such as instruments, electronic products, leather, shoes, clothing, food, medicine and household appliances, etc.) to prevent the items from being damp, mildewed or rusted.

The above content reference: Encyclopedia - desiccant.

1. Moisture-proof packaging: cameras and photosensitive materials, precision instruments and electrical appliances, food, medicines, shoes, clothes, leather, telecommunication equipment, etc.

2. Air dehumidification: closets, cabinets, floors, musical instruments, etc.

3. Air drying: air drying in warehouses, shipyards, pharmaceutical factories, precision machinery, electronic equipment manufacturing plants, compressed air, and instrumentation.

4. Industrial gas dehydration and refining: hydrogen, oxygen, nitrogen, chlorine, CO2, acetylene, ethylene, methane, ethane, propane, SO3, SO2, natural gas, coal gas.

Chemical adsorption. 1. Acid desiccant: concentrated sulfuric acid, phosphorus pentoxide, used to dry acidic or neutral gases, of which concentrated sulfuric acid can not dry hydrogen sulfide, hydrogen bromide, hydrogen iodide of strong reducing acid gas; Phosphorus pentoxide cannot dry ammonia.

2. Neutral desiccant: anhydrous calcium chloride, general gas can be dried, but anhydrous calcium chloride cannot dry ammonia and ethanol;

3. Alkaline desiccant: soda lime (a mixture of CAO with NaOH and KOH), quicklime (CAO), NaOH solid, used to dry neutral or alkaline gases.

Desiccant can remove the moisture in the article or air, generally divided into chemical desiccant and physical desiccant, of which the chemical desiccant is made of calcium sulfate and calcium chloride, and the physical desiccant is made of silica gel and alumina raw materials, desiccant is widely used, and is used in food moisture-proof, instrument preservation, etc.

The role of desiccant.

1. Adsorption of moisture.

Desiccant is a chemical substance used to remove moisture from articles or air, because under different humidity, the storage time of food, equipment, clothing and other items is different, and the moisture in the air will accelerate the decay of food and the aging of equipment, so desiccant is needed to keep items dry.

2. Use classification.

The desiccant is generally divided into two parts: chemical desiccant and physical desiccant, the two have different ways of absorbing water, in which the chemical desiccant uses calcium sulfate and calcium chloride as raw materials to achieve the effect of adsorbing water through chemical reactions, while the physical desiccant uses silica gel and alumina raw materials to adsorb water through physical means.

3. Scope of application.

Desiccants have a wide range of uses, and can be used in food and medicine to ensure that the substances in them are dry, thereby inhibiting the growth of bacteria and molds, and in clothing, equipment, leather and other items can be used to place items rust to avoid corrosion by moisture.

Desiccant can remove the water leakage in the article or air, generally divided into chemical desiccant and physical desiccant, of which the chemical desiccant is buried with calcium sulfate and calcium chloride as raw materials, and the physical desiccant is silica gel and alumina raw materials, desiccant is widely used, in food moisture-proof, instrument preservation and other aspects have applications.

1. Adsorption of moisture.

Desiccant is a chemical substance used to remove moisture from articles or air, because under different humidity, the storage time of food, equipment, clothing and other items is different, and the moisture in the air will accelerate the decay of food and the aging of equipment, so desiccant is needed to keep items dry.

2. Use classification.

The desiccant is generally divided into two parts: chemical desiccant and physical desiccant, the two have different ways of absorbing water, in which the chemical desiccant uses calcium sulfate and calcium chloride as raw materials to achieve the effect of adsorbing water through chemical reactions, while the physical desiccant uses silica gel and alumina raw materials to adsorb water through physical means.

3. Scope of application.

Deiccant has a wide range of uses, and can be used in food and medicine to ensure that the substances in it are dry, thereby inhibiting the growth of bacteria and molds, and in clothing, equipment, leather and other items can be used to place items rust to avoid corrosion by water and liquid rot.

What exactly is the composition of desiccant? According to its classification, desiccant can contain calcium sulfate and calcium chloride, silica gel and activated alumina. Desiccants refer to substances that can remove water from moist substances, and are often divided into two categories: chemical desiccant and physical desiccant.

Chemical desiccants, such as calcium chloride or calcium sulfate, are combined with water to produce hydrates. There are probably the following chemical desiccants: quicklime desiccant, magnesium chloride, calcium chloride, soda lime or phosphorus pentoxide, silicic acid, etc.

Physical desiccant, such as silica gel and activated alumina, is dried by physical water absorption. Physical desiccants mainly refer to the following silica gel desiccant, clay desiccant, molecular sieve desiccant, mineral desiccant, fiber desiccant, montmorillonite desiccant, etc.

So what should I do if I ingest desiccant by mistake? If you accidentally consume calcium oxide desiccant, you should not be careless. This desiccant is what we usually call quicklime, after encountering water, it will become a strong alkali like calcium bicarbonate, which is rotten, please drink water at home to dilute it, and then send it to the hospital for further treatment.