What is chlor-alkali process reaction?
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What is chlor-alkali process reaction?
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.
What is the process of alkali?
Chlor-alkali processing is essentially the electrolysis of sodium chloride (NaCl), allowing for the creation of chlorine and sodium hydroxide, along with hydrogen. All three of these chemicals have many large-scale industrial applications. The chlor-alkali process makes use of brine and a membrane cell.
How does the chlor-alkali 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 diaphragm cell?
[′dī·ə‚fram ‚sel] (chemical engineering) An electrolytic cell used to produce sodium hydroxide and chlorine from sodium chloride brine; porous diaphragm separates the anode and cathode compartments.
Why chlor-alkali process is called so?
It is called so because the products formed in the reaction are chlorine and sodium hydroxide . Here chlor stand for chlorine and alkali is for sodium hydroxide.
Which of the following is obtained by chlor-alkali process?
i)The products obtained in chlor – alkali process are sodium hydroxide, chlorine gas, and hydrogen gas.
What is alkali made from?
The manufacture of industrial alkali usually refers to the production of soda ash (Na2CO3; sodium carbonate) and caustic soda (NaOH; sodium hydroxide). Other industrial alkalies include potassium hydroxide, potash, and lye.
What is the purpose of the membrane in the electrolysis cell?
The purpose of the membrane is to separate the anode loop (anolyte) from the cathode loop (catholyte) by a fluid, in order to avoid unwanted secondary reactions, so as to combine the electrode reaction with a separation step or to isolate separately the products formed on the electrode.
What is chlor-alkali process Why is it called so?
What is difference between diaphragm and membrane?
A diaphragm is a flexible, relatively thick, quasi-self-supporting partition between two areas or volumes (something like the rubber of an inner tube for a tyre). A membrane is also a partition, but it is relatively thin (something like a plastic film) and typically not self-supporting.
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 chloro alkali reaction explain with example?
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. An aqueous solution of sodium chloride is called brine. 2NaCl (aq) + 2H2O(l) (electrolysis) → 2NaOH(aq) + Cl2(g) + H2(g).
What is the byproduct of chlor-alkali process?
chlorine gas
The chlorine gas obtained as the byproduct in the chloralkali process by the electrolysis of brine is used for manufacturing bleaching powder by passing the obtained chlorine gas over the dry slaked lime that is calcium hydroxide.
What is chlor-alkali used for?
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.
Why is chlor-alkali process called so?
How does PEM electrolyzer work?
In a polymer electrolyte membrane (PEM) electrolyzer, the electrolyte is a solid specialty plastic material. Water reacts at the anode to form oxygen and positively charged hydrogen ions (protons). The electrons flow through an external circuit and the hydrogen ions selectively move across the PEM to the cathode.
How does an ion exchange membrane work?
An ion-exchange membrane is a semi-permeable membrane that transports certain dissolved ions, while blocking other ions or neutral molecules. Ion-exchange membranes are therefore electrically conductive.
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.
