What are the main uses of ammonium carbonate? 【1】
Matte orthorhombic crystal powder. Has a strong ammonia odor. Anhydrous salt is generally not available, and the industrial product is actually a double salt of ammonium bicarbonate and ammonium carbamate. Contains 31% ammonia and 56% carbon dioxide. Soluble in water, insoluble in ethanol, carbon disulfide and concentrated ammonia. It is unstable in the air and will gradually turn into ammonium bicarbonate and ammonium carbamate. The dried material is easily decomposed at 58°C, releasing ammonia and carbon dioxide. The aqueous solution begins to decompose at 70°C
What are the main uses of ammonium carbonate
This product is a white translucent crystalline hard block; it has a strong ammonia odor, but no burnt smell; in the air, it partially decomposes and volatilizes, losing ammonia and carbon dioxide, becoming opaque, and finally becoming a porous and brittle block. Or white powder; easily deteriorates when exposed to light.
What is the main pharmacological use of ammonium carbonate【2】
After oral administration, this product can stimulate the vagus nerve endings of the gastric mucosa, which reflexively causes the secretion of bronchial glands to increase, diluting thick sputum and making it easier to cough up. Therefore, the stimulation to the bronchial mucosa is reduced, and the cough is relieved. In addition, after this product is absorbed into the body, a small part is excreted from the respiratory tract, bringing out water to thin the sputum and facilitate coughing, and it also plays a certain role in relieving cough. This product is a salt of strong acid and weak alkali. It is an effective acidifier of body fluids. It can acidify urine and accelerate the excretion of drugs when poisoning with weak alkaline drugs. Mainly suitable for the early stages of bronchitis. This product is completely absorbed after oral administration and is almost completely transformed and degraded in the body, with only a very small amount of the original form being excreted in the feces. Unstable to light and heat. Slightly hygroscopic.
What is the main use of ammonium carbonate[3][4]
Used as fertilizers, printing and dyeing auxiliaries, buffers, and the manufacture of fire extinguishing agents, detergents, and various ammonium salts. In the rubber industry, it can be used as a foaming agent for natural rubber and latex to produce open-cell sponge rubber. In the plastics industry, it is used as a foaming agent for phenolic resin, urea-formaldehyde resin, polyvinyl chloride, etc. and as an auxiliary foaming agent for polyurethane foam. Food grade ammonium carbonate can be used as leavening agent, neutralizing agent and fermentation accelerator. As an expectorant, it has a similar effect to ammonium chloride, but is less effective and less likely to cause acidemia in the body.
What are the main uses and dosage of ammonium carbonate
Oral administration: 10 to 25 grams for horses, 10 to 30 grams for cattle, 2 to 3 grams for sheep and pigs, and 0.2 to 1 grams for dogs.
What is the main use of ammonium carbonate?【5】
Carbonization method: Carbon dioxide, ammonia and steam are directly synthesized into ammonium carbonate, passed into the cooling chamber, directly cooled with water, and then refined to obtain ammonium carbonate finished product. The reaction formula is as follows:
Ammonium carbonate can be produced by saturated ammonia with carbon dioxide or by absorbing ammonia and carbon dioxide simultaneously with water. It can also be produced by interacting gaseous ammonia and carbon dioxide in the presence of water vapor (23″. These methods are usually combined. .First, prepare an aqueous ammonium carbonate solution, evaporate NH and CO from the aqueous ammonium carbonate solution, and then interact with NH and CO2 to obtain a solid product.
In two absorption towers (carbonization towers) that spray circulating liquid (countercurrent with gas) operating in series, absorb carbon dioxide and gaseous ammonia with water to produce an aqueous ammonium carbonate solution with a concentration of 25-27%. Carbon dioxide is obtained from lime kiln gas. Carbon dioxide and ammonia accounting for 80% of the total ammonia are fed into the first carbonization tower. The remaining 20% ammonia gas is added to the gas entering the second carbonization tower from the first carbonization tower, and then the gas is vented through a scrubber sprayed with 10-15% ammonium nitrate (containing a small amount of acid) solution. The circulating solution is passed through the water cooler to remove the heat released in the carbonization tower (cooled from 50°C to 35°C). In order to reduce equipment costs, it is recommended to carry out such a process in a vertical column with minimal ammonia losses ‘2J4:.
The ammonium carbonate solution taken out from the first carbonization tower is sent for distillation, and the carbon dioxide, ammonia and water vapor discharged from the distillation tower are sent to the sublimation chamber at 60°C to generate crude ammonium carbonate. The crude ammonium carbonate is then sublimated to obtain the finished product. Ammonium carbonate solution must be prepared in advance mainly in coking chemical plants, because this can fix the ammonia in the coke oven gas without consuming sulfuric acid, and at the same time, ammonium carbonate can be generated instead of ammonium sulfate.
When using synthetic ammonia or other concentrated gaseous ammonia, carbon dioxide and water vapor, ammonium carbonate crystals can be directly produced. The reaction process is carried out in a sealed reaction chamber, which is lined with aluminum and cooled with cold water. The cold water circulates in an aluminum tube located at the upper part of the reaction chamber. The solid crystals generated in the reaction chamber are a mixture of ammonium carbonate, ammonium bicarbonate and ammonium carbamate. The product is intermittently discharged from the reaction chamber for packaging.
What are the main uses of ammonium carbonate? Packaging, storage and transportation
Package in sealed glass bottles, jars or iron drums, and there should be a clear “corrosive substance” mark on the packaging. Inorganic corrosive items. It should be stored in a cool, ventilated place isolated from fire sources. The container should be sealed to reduce volatilization loss of ammonia. Avoid the decomposition of boric acid in the sun and should not be stored for a long time. Do not store or transport together with acids. Protect from rain and sunlight during transportation. In case of fire, water and sand can be used to put out the fire.
Because ammonium carbonate is inDuring the preparation or storage process, it is easy to lose moisture or ammonia due to heat
[Tag sodium perborate monohydrate: title] Toxicity and protection
If it accidentally splashes into people’s eyes, rinse immediately with plenty of water. Irritating to skin. Pay attention to dust prevention and dust removal, protect respiratory organs, and protect the skin.
