What is Hemihydrate process?
What is Hemihydrate process?
The HDH process is a two stage process whereby the hemihydrate produced in the energy efficient first stage is transformed to dihydrate in the second stage and the liberated P2O5 losses present in the hemihydrate produced in the first stage are recovered, resulting in a very high P2O5 recovery efficiency.
Which is the economical process for manufacture of phosphoric acid in India?
Wet process by HCl leaching
Which is the economical process for manufacture of phosphoric acid in India? Explanation: Wet process by HCl leaching is the economical process in India, because of excess chlorine and low sulfur content and we can produce ammonium sulfate from gypsum in H2SO4 process.
What is IMI process in the production of phosphoric acid?
The IMI process, for production of high-grade technical phosphoric acid, involves the attack of phosphate rock by hydrochloric acid. In addition to the most frequently used sulphuric acid, both hydrochloric and nitric acids can also be employed to digest phosphate rock to produce phosphoric acid.
What is phosphoric acid made out of?
mineral phosphorus
Phosphoric acid is made from the mineral phosphorus, which is found naturally in the body. It works with calcium to form strong bones and teeth.
What is contact process in chemistry?
contact process, modern industrial method of producing sulfuric acid; it has largely replaced the chamber, or lead-chamber, process. Sulfur dioxide and oxygen, passed over a hot catalyst, unite to form sulfur trioxide, which in turn combines with water to make sulfuric acid.
How is triple superphosphate made?
Manufacturers make nongranular TSP typically by reacting finely ground phosphate rock with liquid phosphoric acid in a cone-type mixer. Granular TSP is made similarly, but the resulting slurry is sprayed as a coating onto small particles to build granules of the desired size.
What is IMI process in the production of phosphoric acid Mcq?
Explanation: Israel Mining industries=IMI process is the wet process of phosphoric acid production by hydrochloric acid leaching. In this process concentrated aqueous HCL as waste or by product acid is used.
What is merseberg process?
Merseberg Process In this process, first carbon dioxide is absorbed in ammonia solution to obtain ammonium carbonate solution. Ammonium carbonate solution is then reacted with gypsum (CaSO4, 2H2O) to produce ammonium sulphate and calcium carbonate.
Is H3PO4 organic or inorganic?
Phosphoric Acid is a colorless, odorless phosphorus-containing inorganic acid.
What is the main process of hemihydrate?
The Main Hemihydrate Processes The hemihydrate (HH) process gives a product acid ex filter of up to 49% P 2 O 5. Calcium sulphate hemihydrate is discharged as a by-product. The filter acid may be further concentrated by evaporation, if required, for downstream uses.
What is phosphoric acid production?
Phosphoric acid production is an important part of the Yara licensing portfolio. Formerly known as Hydro Agri and prior to that, Fisons, we have successfully designed and commissioned several world scale hemihydrate and hemidihydrate process phosphoric acid plants over the course of the last forty years.
How do you precipitate calcium sulphate hemihydrate crystals?
Sulphuric Acid Feed Sulphuric acid is added to the reaction system to precipitate calcium sulphate hemihydrate crystals as shown in the overall reaction equation in section 1.3. Concentrated sulphuric acid is fed directly to the hemihydrate reaction system without the need to dilute the acid beforehand.
How do you dilute sulphuric acid in a hemihydrate reaction?
Concentrated sulphuric acid is fed directly to the hemihydrate reaction system without the need to dilute the acid beforehand. There is a need, however, to have a system whereby the sulphuric acid is mixed with weak phosphoric acid which is recycled back from the filtration section to the reaction section.
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