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Large grain salt
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Among the main products of the basic chemical industry, hydrochloric acid, caustic soda, soda ash, ammonium chloride, and chlorine are mainly produced using industrial salt as raw materials. In addition, it is also used in soap manufacturing, ceramics, glass production, daily chemicals, petroleum drilling, drilling fluids, completion fluids, petrochemical dehydration fluids, early strength agents in the construction industry, coagulants in the production of coatings, and latex coagulants in the rubber industry , Paper industry additives and waste paper deinking, chemical industry inorganic chemical raw materials and sulfate removal agents, sodium alginate coagulant, prevention and control of wheat, apples, cabbage and other rot and food preservatives, preparation of sodium metal and others Sodium compounds, steel heat treatment media, etc. Salt also has a wide range of uses in water treatment, road snow removal, and refrigeration.
The term "industrial salt" is unscientific. Before the industrial age, people referred to salt as table salt used in daily life, not the "salt" in chemical science. However, in real life, a considerable number of people are not well-educated, and cannot distinguish the substantial difference between "salt" in life and "salt" in chemistry. There have been many incidents of accidental consumption of toxic salt and group poisoning. event.
Nitrite is reductive and active, and cured meat, even if it is stale meat products, can be bright in color. Some unscrupulous and ignorant businesses in life use industrial salt to marinate stale meat products, resulting in mass nitrite poisoning incidents. Therefore, "industrial salt" is usually used to specifically refer to nitrite. Long-term human body intake of nitrite also increases the risk of cancer. Industrial salt is strictly prohibited.
The salt mentioned in daily life refers to the processing and extraction of sea water, salt ponds, salt wells and salt mines. Its main component is sodium chloride (NaCl), which are called sea salt, pond salt, well salt and rock salt respectively. The past and future of human beings rely on these kinds of salts to take in our essential inorganic salts. With the development of the chemical industry and chemical science, the meaning of the word "salt" has been greatly expanded. As mentioned in middle school chemistry textbooks, "salt" refers to a compound composed of "metal ions" (including ammonium ions) and acid radical ions. They have a wide variety, different properties, different appearances, and very different uses. Due to the importance and high profits of table salt, successive governments have adopted a monopoly policy on table salt, so there is a difference between "official salt" and "private salt". In recent years, due to the requirements of nutrition and hygiene, a small amount of potassium iodate (KIO3) and other nutrients have been added in the process of processing raw salt into refined salt, so there is a difference between "qualified" and "unqualified" table salt. The formulations of these types of salt are differences in policy management, and there is no substantial difference in the composition of "salt". "Private salt" and "unqualified salt" with no potassium iodate added, although illegal is not harmful, there is no difference between "real salt" and "fake salt", and their main ingredients are sodium chloride.