Basic information:
Anhydrous sodium sulphate is called anhydrous sodium sulfate as white fine-grained crystal or powder. It is hygroscopic, soluble in water and neutral in aqueous solution. Soluble in glycerin, not soluble in alcohol. The anhydrous substance with high purity and fine particle size is called Anhydrous sodium sulphate. 
Indicator 
 
Preparation
sulfate method (Beach field method) 
with a different natural seasonal temperature variations in the moisture of the raw material solution was evaporated, the crude crystallized Glauber's salt. In the summer, salt water containing sodium chloride, sodium sulfate, magnesium sulfate, magnesium chloride and the like is poured into the beach field, and evaporated by the sun, and the palmillite is precipitated in the winter. This method is the main method for extracting thenardite from natural resources. The process is simple, the energy consumption is low, but the working conditions are poor, and impurities such as mud and sand are easily mixed into the product. 
Sodium sulfate method 2 (mechanical freezing method) 
uses a mechanical device to evaporate the raw material liquid and freeze it to -5 to -10 ° C to precipitate Glauber's salt. Compared with the beach method, this method is not affected by seasonal and natural conditions. The product quality is good, but the energy consumption is high. 
Sodium sulfate method 3 (salt lake comprehensive utilization method) is 
mainly used for sulfate-carbonate type salt water containing various components. The crude Glauber's salt is separated while extracting various useful components. For example, processing salt lake water containing sodium carbonate, sodium sulfate, sodium chloride, boride and potassium, bromine and lithium, carbonizing the salt lake brine first, converting sodium carbonate into sodium hydrogencarbonate crystallizing; cooling the mother liquor to 5-15 ° C, The borax is crystallized; the secondary mother liquid after separating the borax is frozen to 0 to 5 ° C to precipitate Glauber's salt. [2] 
Other methods of sodium sulfate 
can be obtained by reacting sulfuric acid with sodium hydroxide. H2SO4 + 2NaOH → Na2SO4 + 2H2O. It can also be obtained by extraction from natural products. 
It can also be prepared by reacting sodium hydrogencarbonate with sulfuric acid: 2NaHCO3+H2SO4→Na2SO4+2H2O+2CO2↑. 
Sodium sulfate can be prepared in the laboratory using sodium chloride solids and concentrated sulfuric acid under heating. 2NaCl+H2SO4→2HCl↑+Na2SO4
Or prepared by reacting sodium hydroxide with copper sulfate: 2NaOH + CuSO4 =====Na2SO4+Cu(OH)2↓ 
In the family, sodium carbonate or sodium hydrogencarbonate can be reacted with copper sulfate: 
2CuSO4+2Na2CO3+H2O= Cu2(OH)2CO3 ↓+ 2Na2SO4 +CO2↑ 
4NaHCO3+2CuSO4=Cu2(OH)2CO3↓+2Na2SO4+3CO2↑+H2O 
can be determined by beach method, mechanical freezing method and salt lake comprehensive method. The beach method and the mechanical freezing method are suitable for processing seawater-type brines containing Na, Mg, Cl, SO42- as main components and various other mirabilites. Since the solubility of sodium sulfate is rapidly reduced at low temperatures, the crude mirabilite can be separated from the brine according to the phase equilibrium relationship of the water-salt system. 
Categories
a product (content 99.2%): mainly used for dyeing, glass, various types of fillers, synthetic detergent, vinylon and the like. 
Content: 94%. Particle size 60 
content 99%, particle size 80-120 
product packaging
50 kg woven bag packaging 
By-product Anhydrous sodium sulphate
a content of about 94%, with white agglomerates, but easy to break, no chloride ions, more suitable for cement grinding The agent (Shouguang delivery) 
is a white or blue non-caking, individually packaged, and does not distinguish colors when shipped. 
Product use
1. The chemical industry is used to manufacture sodium sulfide sodium silicate water glass and other chemical products. 
2. The cooking agent used in the paper industry for the manufacture of kraft pulp. 
3, the glass industry to replace soda ash as a cosolvent. 
4. The textile industry is used to blend vinylon spinning coagulants.
5, for non-ferrous metallurgy, leather and other aspects. 
6, used to make sodium sulfide, pulp, glass, water glass, enamel, also used as a laxative and antidote to strontium salt poisoning. It is a by-product of the production of hydrochloric acid from salt and sulfuric acid. Chemically used in the manufacture of sodium sulfide, sodium silicate, etc. The laboratory is used to wash away the strontium salt. Industrially used as a raw material for the preparation of NaOH and H2SO4, also used in paper, glass, printing and dyeing, synthetic fiber, leather and so on. Sodium sulfate is the most commonly used post-treatment desiccant in organic synthesis laboratories. 
7. Mainly used as a filler for synthetic detergents. A cooking agent used in the paper industry to make kraft pulp. The glass industry is used to replace soda ash. The chemical industry is used as a raw material for the manufacture of sodium sulfide, sodium silicate and other chemical products. The textile industry is used to blend vinylon spinning coagulation baths. The pharmaceutical industry is used as a laxative. Also used in non-ferrous metallurgy, leather and other aspects. 
8. The hydration product calcium sulphoaluminate is formed faster, which accelerates the hydration and hardening speed of the cement. The dosage of sodium sulfate is generally 0.5% to 2% of the mass of cement, which can increase the early strength of concrete by 50% to 100%. The strength of 28 days is sometimes increased, sometimes decreased, and the increase is about 10%. With the variety and curing conditions of cement. It varies with its amount. It is also used as a filler for synthetic detergents, and is also used in the paper industry, the glass industry, the chemical industry, the textile industry, and the pharmaceutical industry. 
Glauber's salt
Glauber's salt, sodium sulfate decahydrate alias, is a sulphate mineral Glauber processed refined crystals. Can be indications: broken, warm, digestion, water, and diarrhea. For stomach cramps, chyme, indigestion, edema, edema, breasts, amenorrhea, constipation. In arid regions, the salt and husk formed by them are often seen. 
Production methods:
1. Take the natural production of thenardite, dissolve it with hot water, filter it, and release the crystal when it is cooled. Then take the radish and wash the slice, put the water in the pot and cook it, add it to the whole, and then dissolve it completely. After taking out the filtration or clarification, take the upper layer of liquid, let it cool, and crystallize it. After drying, it is thenardite (100 jin per plant) , with radish 10-20 kg).  
2, also take natural production of thenardite, after scouring, filtration, cooling, take the upper layer of crystals for Glauber's salt, the lower layer of crystal is Pak Nd.  
10. Used in chemical, paper and glass, dye, printing and dyeing and pharmaceutical industries. It is also used in the manufacture of synthetic fibers, tanning, non-ferrous metallurgy, enamel, etc. It is also used as an additive in detergents and soaps. 
11. It can be used as a buffer in sulphate galvanizing to stabilize the pH of the bath.