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Sodium Sulfate


1.What is the properties of anhydrous sodium sulfate?
Sodium sulfate is in ...

2.What is the facts of sodium sulphate anhydrous?

Sodium sulphate is found ...
3.What is anhydrous sodium sulfate’s usage?
Sodium sulphate is mainly used in laundry detergents...

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sodium sulfate anhydrous application


In 1995, bulk sodium sulfate sold for around $70 per tonne in the US, making it a very cheap material. Probably the largest use for sodium sulfate today is as a filler in powdered home laundry detergents. Total consumption of Na2SO4 in Europe was around 1.6 million tons in 2001, of which 80% was used for detergents. However this use is waning, as domestic consumers switch to liquid detergents which do not include sodium sulfate.
Another major use for Na2SO4 99% , particularly in the US, is in the Kraft process for the manufacture of wood pulp. Organics present in the "black liquor" from this process are burnt to produce heat, needed to drive the reduction of anhydrous sodium sulfate to sodium sulfide. However this process is being replaced to some extent by newer processes; use of Na2SO4 in the US pulp industry declined from 980 000 tons in 1970 to only 210 000 tons in 1990.
The glass industry also provides another significant application for sodium sulphate anhydrous , consuming around 30 000 tons in the US in 1990 (4% of total US consumption). It is used as a "fining agent", to help remove small air bubbles from molten glass.Sodium sulphate USP also fluxes the glass, and prevent scum formation of the glass melt during refining.
Sodium sulfate is important in the manufacture of textiles, particularly in Japan. It helps in "levelling", reducing negative charges on fibres so that dyes can penetrate evenly. Unlike the alternative sodium chloride, Sodium sulfate does not corrode the stainless steel vessels used in dying.

Glauber's salt, the decahydrate, was formerly used as a laxative. Sodium sulfate anhydrous has also been proposed for heat storage in passive solar heating systems. This takes advantage of the unusual solubility properties (see above), and the high heat of crystallisation (78.2 kJ/mol). Other uses for sodium sulfate include frosting windows, in carpet fresheners, starch manufacture and as an additive to cattle feed. In the laboratory, anhydrous sodium sulfate is widely used as an inert drying agent for organic solutions; Na2SO4 is added to the solution until the crystals no longer clump together.