WHAT IS A chlor-alkali cell?
WHAT IS A chlor-alkali cell?
The chloralkali process (also chlor-alkali and chlor alkali) is an industrial process for the electrolysis of sodium chloride solutions. It is the technology used to produce chlorine and sodium hydroxide (caustic soda), which are commodity chemicals required by industry.
How does the chloralkali process work?
In the chlor-alkali process, sodium chloride is converted into sodium hydroxide and chlorine by impressing an electric current through the solution. This electrochemical process is referred to as electrolysis (Rhees 2007).
What is chloralkali process and why is it called so?
When electricity is passed through an aqueous solution of sodium chloride , it decomposes to form sodium hydroxide . This process is called chlor-alkali process. It is called so because the products formed in the reaction are chlorine and sodium hydroxide .
What are the products formed in chloralkali process?
The chlor-alkali electrolysis process is used in the manufacture of chlorine, hydrogen, and sodium hydroxide (caustic) solution. Of these 3, the primary product is chlorine. Chlorine is 1 of the more abundant chemicals produced by industry and has a wide variety of industrial uses.
Where chloro alkali is used?
Common Applications for Chlor-Alkali Materials In fact, chlorine is used in roughly 55% of all industrial chemical processes and has applications in the manufacturing of plastics and resins, water purification processes, and the production of pure silicon, which is used in electronic components and solar panels.
What are reactions at cathode and anode in chloralkali process?
The process makes use of brine and a membrane cell with positive and negatively charged electrodes. The anode (negative charge) oxidizes the chloride ion, which loses an electron to become free chlorine gas. The hydrogen ions are pulled at the cathode and form hydrogen gas.
What is chloralkali process and write equation?
The process is called the chlor-alkali alkali process. An aqueous solution of sodium chloride is called brine. 2NaCl (aq) + 2H2O(l) (electrolysis) → 2NaOH(aq) + Cl2(g) + H2(g). Chlorine gas is given off at anode and hydrogen gas at cathode.
What is chloralkali process write the balanced chemical equation name the products obtained during the process with their uses?
This process is called chlor-alkali processbecause of two products-chlor for Chlorine and alkali for Sodium hydroxide. `2NaCl(aq) + 2H_2O (l) to 2NaOH (aq) + Cl_2 (g) + H_2(g)` . It is used in fertilizers, PVC, CFcs, Pesticides, paper making, artificial, fibres, soap and detergents.
What is Nelson cell?
Nelson cell is an example of an electrolytic cell where the redox reaction undergoes an application of electrical energy. In the nelson cell, sodium hydroxide production from a brine solution is an electrolytic process.
What is chloralkali process Class 10?
When electricity is passed through an aqueous solution of sodium chloride it decomposes to form sodium hydroxide. The process is called the chlor-alkali alkali process because of the products formed: chlor for chlorine and alkali for Sodium Hydroxide.
What is chloralkali process write the balanced chemical equation?
Chlorine gas is formed at the anode (positive charge) and hydrogen gas at the cathode (negative charge). The reaction that takes place given as: 2NaCl + 2H2O → 2NaOH + Cl2 + H2 The above reaction is called chlor-alkali process.
What is Castner Kellner cell?
The Castner Kellner process is a method of electrolysis of sodium chloride solution to produce alkali hydroxide. It uses electrolyte of NaCl solution graphite anode and mercury cathode. In other cell sodium hydroxide is an electrolyte, Hg anode is used as an intermediate between two cells and an iron cathode.
What is mercury cell technology?
The mercury-cell process is one of three manufacturing processes used by the chloralkali sector to produce chlorine and caustic soda. Mercury-cell chlor-alkali production remains a significant use of mercury globally and can be an important source of mercury releases to the environment.
What is membrane cell in chloralkali process?
Membrane cell The most common chloralkali process involves the electrolysis of aqueous sodium chloride (a brine) in a membrane cell. A membrane, such as one made from Nafion, Flemion or Aciplex, is used to prevent the reaction between the chlorine and hydroxide ions. Basic membrane cell used in the electrolysis of brine.
What is the mercury cell for chloralkali?
Mercury cell for chloralkali process In the mercury-cell process, also known as the Castner–Kellner process, a saturated brine solution floats on top of a thin layer of mercury. The mercury is the cathode, where sodium is produced and forms a sodium-mercury amalgam with the mercury.
What is the removal of sulphate in chloralkali process?
Removal of sulphate in Chloralkali process Membrane cell process for chlor alkali production Membrane cell process for chlor alkali production The process makes use of brine and a membrane cell with positive and negatively charged electrodes. The anode (negative charge) oxidizes the chloride ion, which loses an electron to become free chlorine gas.
What is the difference between membrane and diaphragm chloralkali?
The membrane and diaphragm method use no mercury, but the sodium hydroxide contains chlorine, which must be removed. The most common chloralkali process involves the electrolysis of aqueous sodium chloride (a brine) in a membrane cell.