(THIS REPLY IN NO WAY TO PROMOTE RWSL & THE INFORMATION BELOW MAY NOT BE RELEVANT TO RWSL)
After going through this post, I realise that many people think that salt is used only for food. But there are many other purposes for which salt is used. See below the extractions from a website.Uses & Benefits of Salt
The multiple chemical and physical properties of salt make possible 14,000 known uses. From the days of the cave men, humans have discovered ingenious means to use salt to enhance the quality of our lives. So valuable is this common mineral that wars have been waged and revolutions fought for access to salt. Its largest use is largely invisible to the public: about 40% of salt worldwide is used as the raw material that chemical companies transform into chlorine and soda ash, the foundations of inorganic chemistry. Salt is a processing aid in innumerable industries and the means by which animal nutrition experts ensure the health and productivity of livestock and poultry. We are all familiar with the salt shaker on the table in most of our homes. We less often think of the salt we use to regenerate our water softeners to protect the pipes and appliances in our homes. And seasonally, many of us give thanks for the salt that road maintenance crews apply to keep our cars, trucks and school buses safely on snowy winter roads.Salt in industry
Salt is all around you. Many, even most, of the products you see are produced from salt or using salt in their manufacture.
Industries use most of the salt produced in the world today. The biggest single use of salt is also one of the least known. Salt is the feedstock for the chlor-alkali chemical industry, just as oil is for the petrochemical industry. The difference: we are not running out of salt! Chlorine chemistry brings consumers clean water, soaps and detergents, many medications, PVC pipes for our homes, cell phones, cosmetics, protective suits for SCUBA divers – and astronauts, digital cameras, flat panel TVs, electron microscopes, solar panels for energy production. The list is essentially endless. Manufacturing textiles, glass, rubber, leather, even drilling oil wells, depends on salt. Salt has 14,000 known uses.
Salt in chlorine chemistry
Salt is the feedstock of the chlor-alkali industry which produces chlorine, caustic soda and the myriad other products formed from these basic chemicals. The chemical industry well-describes the chemical genealogy of salt with its “Chlorine Tree.” Globally, chlorine chemistry is the single largest market for salt, although in the U.S., where there are numerous areas with exploitable salt deposits, the salt produced for chemical production is often extracted directly by chemical companies and not by salt producers. In Europe and Japan, the chlor-alkali industry is more likely to buy its salt from a salt company.
Chemical companies pass an electrical current through saturated salt brine in a salt bridge, producing a oxidation-reduction (redox) chemical reaction. This electrolysis separates the gaseous chlorine, (Cl2), from the sodium hydroxide (caustic soda). Chlorine is an effective disinfectant and bleach. We use it to keep drinking water safe. And swimming pools. Downstream, vinyl chloride and polyvinyl chloride (PVC) and their derivatives are produced from chlorine. Caustic soda is used in pulp processing, and to make cellulose chemicals and their derivatives. Sodium chlorite is used in the textile industry. Other chemicals manufactured from salt are metallic sodium and sodium chlorate. Until 1986, salt was used to produce synthetic soda ash (NaCO3) in the U.S. by the Solvay process. Soda ash is now obtained naturally from trona mines.
Salt-based chemicals are used:
To cool nuclear reactors (liquid sodium)
To make brass and bronze (metallic sodium)
To make case-hardened steel, fumigating materials, and are used to make the dye, indigo (sodium cyanide)
To produce polymers used to make plastics, synthetic fibers, and synthetic rubber (chlorine)
In crude oil refining and for making pesticides (chlorine)
To make bleach and to disinfect public drinking water supplies and treat municipal sewage (chlorine)
To make glass, rayon, polyester and other synthetic fibers, plastics, soaps and detergents (caustic soda)
Extensively in the manufacture of pulp and paper, dyes and ceramic glazes (sodium sulfate)
In manufacturing glass, pulp and paper, and rayon (sodium carbonate)
In making synthetic rubber and in cleaning gas and oil wells (hydrochloric acid)
In textile manufacturing, processing leather, making glass and neutralizing acids (sodium bicarbonate)
As an ingredient in fertilizers and explosives (sodium nitrate)
Learn more about how other industries use these products of chlorine chemistry .
Due to security concerns with the transportation of chlorine in tanker trucks and rail cars, including chemical terrorism (aka "toxic trains"), some chlorine users are using on-site chlorinators for “saltwater” swimming pools, drinking water purification and wastewater disinfection.
Other industrial uses of salt
It would be difficult to list all of the thousands of industries that use salt as a raw material or ingredient. The major industries include:
Textile and dyeing. Salt is used to fix dyes and to standardize dye batches
Metal processing, such as aluminum refining. Salt is used to remove impurities
Rubber manufacturing. Salt separates the rubber from latex
Oil and gas drilling. Salt is used to produce a drilling mud that prevents widening of bore holes in rock salt strata, inhibits fermentation, and increases mud density
Pharmaceuticals. Salt is used for tablet and caplet polishing, the production of intraveneous saline solutions and for manufacturing hemodialysis solutions used for kidney machines
Animal hide processing and leather tanning. Salt is used to cure, preserve, and tan hides
Pigment manufacture. Salt is a grinding agent
Ceramics manufacture. Salt acts to vitrify heated clays
Soap making. Salt separates glycerol from water
Detergent production. Salt is used as a filler.
Just a few of salt’s other industrial uses include.
Windows, lenses and prisms and in high power laser systems (sodium chloride)
In molten salt reactors to produce and separate transuranic elements (sodium chloride) - see "further reading" to left
In molten salt incineration of high explosives, propellants, and pyrotechnics (sodium chloride)
In salt bath furnaces for a number of heat treatment applications such as: austenitizing, martempering, neutral hardening, tempering nitriding, carburizing, and dip brazing (sodium chloride)
To generate electricity in salinity gradient solar ponds (sodium chloride)
As an antifreeze agent in geothermal heating and cooling (sodium chloride)
To combat greenhouse gases by sequestering industrial carbon/carbon dioxide underground (sodium chloride)
And salt mines host experiments in physics and astrophysics that require precise conditions for accurate measurement (sodium chloride)
This is not a buy/sell/hold recommendation for any shares and the reply was to mention other uses of salt