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● Echemi chemical products Concentrated sulfuric acid: Pure product is colorless, odorless, transparent oily liquid, which is strongly acidic. Commercially available industrial sulfuric acid is colorless to yellowish or even reddish brown. Relative density: 98% sulfuric acid 1.8365 (20℃), 93% sulfuric acid 1.8276 (20℃). Melting point 10.35℃, boiling point 338℃, has a strong water absorption capacity, and water can be mixed in different proportions, and release a lot of heat. It is a strong inorganic acid, very corrosive.
● Chromic acid: yellow monoclinic crystal. The relative density is 1.91 (12℃). Heating to 180℃ began to decompose, soluble in cold water, slightly soluble in ammonia, acetone, insoluble in alcohol. Long-term placement can decompose and release ammonia, partially converted into ammonium dichromate.
● Sodium silicate: liquid, solid, powder and other products. Common is a liquid, colorless transparent or with light gray gunk, physical properties vary with the modulus.
● Phosphoric acid: Pure product is colorless rhombic crystal, density 1.834. Soluble in water and ethanol. It is corrosive to the skin and absorbs moisture from the air. Acidity is between strong acid and weak acid.
●XHG-A, XHG-B: These two raw materials are specially prepared by relevant experts. Those who need them can contact Zhiqiang Company to purchase them.
● Selenium dioxide: white or light yellow lustrous quadrangular acicular body, sour and pungent odor, toxic! Density 3.954. Melting point 340℃. Sublimation at 317℃, soluble in water, methanol, ethanol, propanol, acetic acid, see light and heat are stable. Easily reduced by carbon or organic matter.
● Ammonium molybdate: colorless or slightly light green rhomboid crystal. Weathering occurs when placed in the air. And lose some ammonia. Heating to 170 decomposes into ammonia, water and molybdenum trioxide. Soluble in water, strong acid and alkali solution, insoluble in ethanol.
● echemi chemical products Potassium dichromate: orange-red monoclinic or triclinic crystal. The relative density is 2.676 (25℃). When heating to 241.6℃, the triclinic crystal system transforms into monoclinic crystal system. Melting point 398℃. When heated to 500℃, it decomposes and releases oxygen. Toxic!
Gelatin: a kind of glue extracted from animal skin and bone.
● Fluorite powder: suitable for processing crafts, decorations, dry ground powder containing CaF2 is more than 96%.
● Ammonium fluoride: white hexagonal columnar crystal. The relative density is 1.315. Easy deliquescence. Soluble in water and methanol, less soluble in ethanol. Sublimation; An aqueous solution becomes acidic when it evaporates, giving off ammonia gas.
● Ammonium sulfate: alias ammonium sulfide, fertilizer powder: pure product is colorless rhombic crystal. Density 1.769. Soluble in water, not ethanol. The aqueous solution has a pungent, salty taste. Nitrogen content about 20%-21%. Application: Mainly used as fertilizer, welding flux and fabric fire retardant.
●echemi chemical products Barium sulfate: alias: precipitated barium sulfate: colorless rhombic crystal or white amorphous powder. The relative density is 4.50 (15℃). Melting point 1580℃, almost insoluble in water, ethanol and acid. Soluble in hot concentrated sulfuric acid, easy to caking when drying. Barium sulfide can be reduced to carbon at 600℃.
Glycerin: alias: polyoxyglycerol, glycerol, colorless to light yellow viscous liquid. Non-ionic surfactant with strong defoaming ability. It can dissolve in benzene, toluene and other aromatic solvents, chloroform, dichloroethane, ethanol, isopropyl alcohol, etc. Slightly soluble in water, more soluble in cold water. Good chemical stability.
May be bought in small packages.
Solvay's approach additionally called the ammonia-soda approach, become counseled by means of Belgian E. Solvay in 1861 (apprehend the best status for soda ash enterprise development).
this is a vital method of soda ash manufacturing.
This manner replaces the Lubrunn approach because of the smooth comfort to recyclable (raw salt, limestone), continuous manufacturing process, large, pinnacle great, and periodic price.Chemical products In planning sodium carbonate from raw salt and limestone, ammonia features as being a mediator.
The first actual salt is first melted into saturated brine to take away impurities, then ammonia is absorbed to create ammonia brine, then carbonized to acquire folks that are (additionally referred to as weight alkali), filtered and calcined to obtain soda ash.The filtered ammonium chloride mother liquor is decided to the milk of lime to react and distill to extract the ammonia to gain recycled, in conjunction with the received distillation waste liquid is discarded.
The lime and co2 obtained inside the calcination of limestone are extensively-used to decompose the ammonium chloride inside the mom liquor and to make alkali in the course of carbonization.Hou's soda production method: also referred to as joint soda manufacturing approach (recognize the improvement of the excellent reputation for soda ash enterprise).
