What's Barium Sulfate

Update time : 2017-07-13 15:39:57

What’s Barium Sulfate
Barium sulfate has its chemical formula BaSO4. It is colorless or white orthorhombic crystals with relative molecular mass of 233.4, the relative density of 4.5 (15 ℃), the melting point of 1580 ℃, and the Refractive index of 1.637. Upon being heated to 1149 ℃, it will become monoclinic crystalline when the refractive index is 1.649. It is almost insoluble in water with the solubility being 0.00022 at 18 ℃ and 0.0041 at 100 ℃. It is slightly soluble in concentrated sulfuric acid and soluble in carbonate alkali metal solution in which it is converted to barium carbonate; it is insoluble in other kinds of acid or base. In nature, it is existed in the barite mineral form. Upon co-heating with carbon (pulverized coal) to 800 ℃, it is reduced to soluble barium sulfide and carbon monoxide. It has a strong ability for absorbing X-rays with X-ray being impermeable to it. Therefore, it is medically used as the agent (barium meal) for X-rays on the gut and stomach. Barium sulfate is the only non-toxic barium salts. It can be used in analysis reagents, electronics, instrumentation, metallurgy and other industries. It can also be used as a white pigment and an administrated agent upon stomach X-ray angiography; it can also used as copper flux, drilling mud weight enlarging agent and the filling agent of rubber, paper, and plastic. It is produced from the reaction between sulfuric acid and barium chloride.
I-type barium sulfate: it is white loose powder and is odorless and tasteless.
II-type barium sulfate: it is refined from barite sulfate type minerals: barium sulfate. Calculated from the dry goods, the barium sulfate content should not be less than 97%. It is white loose powder, and is odorless and tasteless. Barium sulfate (Ⅰ type and Ⅱ type) are both insoluble in water, organic solvent, acid o and sodium hydroxide. It contains 58.85% of barium.

Uses
1. It can be used for powder coatings, paints, inks, paints, rubber, batteries, plastics and coated paper industries.
2. It can be used medically as the contrast agent of the digestive system.
3. It can be used as the raw material of barium salt as well as rubber fillers, etc.
4. It can be used as the surface coating agents of making paper and coated paper, sizing agent in the textile industry, glass clarifying agent, and the filter of paint, ink, plastics, and rubber.
5. It can be used for high-grade plastics, rubber, paint, powder coating, etc.
6. It can be used as the chemical material of barium salt, the mud weighting agent in the oil industry, mud weighting agent, rubber filler, sizing agents of textile industry, pigments and coatings.
7. It can be not only used as analysis reagents but also for the pharmaceutical industry.
8. It is used as the raw material or filling agents in paints, inks, plastics, rubber and electrical storage tank, surface coating agents of money-type paper money and coated paper, and sizing agents used in the textile industry. In glass products, it is used as a clarifying agent and can play the role of anti-foaming and increasing gloss. It can be used as anti-radiation protective wall material. It can also used in industries of ceramics, enamel, spices and pigments. It can also be used as the expanders of the cathode plate and X-ray contrast agent of digestive tract as well as the raw material for producing other barium salts.
9. It is mainly used as the weighting agent of drilling mud of petroleum and natural gas and is also an important kind of mineral raw material for extracting metals barium and preparation of various kinds of barium compounds. The most important industrial compounds are barium carbonate, barium sulfate, inlay, barium nitrate, barium hydroxide, barium oxide, barium peroxide, barium chromate, barium manganate, barium chlorate, lithopone, and polysulfide barium. Barium compound has very extensive applications such as being used for rubber, plastics, pigment, paint, paper, textile, oil paint, ink, and the raw material and welding filler of covered electrode; it can be used as barium-based grease, for oil refining, sugar manufacturing from beet, and as the raw material for making artificial silk; it can be used as insecticide, sterilizing agent, rodenticide, explosives, green fireworks, signal flares, tracer, and the indicator of medical X-light, etc.
10. It can also be used in sectors of glass, ceramics, leather, electronic, building materials, and metallurgy. Metal barium can be used as the getter and binder of television and vacuum. The alloys made formed between barium and aluminum, magnesium, lead, and silver can be used for the manufacture of bearings.

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What's Barium Sulfate