Sulphuric acid 98% industrial
Sulphuric acid 98% industrial is a colorless oily liquid. It is soluble in water with release of heat. It is corrosive to metals and tissue. It will char wood and most other organic matter on contact, but is unlikely to cause a fire. Density 15 lb / gal. Long term exposure to low concentrations or short term exposure to high concentrations can result in adverse health effects from inhalation. It is used to make fertilizers and other chemicals, in petroleum refining, in iron and steel production, and for many other uses. Rate of onset: Immediate Persistence: Hours, days Odor threshold: Source/use/other hazard: Battery/dyes/paper/glue/metals industries; volcanic gas; toxic fumes when heated.
Sulfuric acid is a sulfur oxoacid that consists of two oxo and two hydroxy groups joined covalently to a central sulfur atom. It has a role as a catalyst. It is a conjugate acid of a hydrogensulfate.
Specification :
Item | Test Standard | Result |
Appearance | transparent Liquid | Accord |
Purity % | 98min | 98.5 |
Ash % | 0.02max | 0.01 |
Fe % | 0.005max | 0.004 |
As % | 0.0001max | 0.00009 |
Hg % | 0.001max | 0.0007 |
Pb % | 0.005max | 0.003 |
Transparency(mm) | 80min | 87 |
Chroma(ml) | 2.0 | 2.0 |
Sulfuric acid, spent appears as a black oily liquid. Corrosive to metals and tissue. Density 15 lb /gal.
Sulphuric Acid 98% is produced from sulphur. Sulphur dioxide is first obtained by the burning of the molten sulphur in presence of air. Sulphur dioxide is then converted to sulphur trioxide in presence of vanadium pentoxide catalyst. The sulphur trioxide thus obtained is absorbed in recycling concentrated sulphuric acid in an absorption tower. The plants installed earlier and the smaller units of Sulphuric Acid 98% plants use a single absorption process which has conversion efficiency of 96–98%. New large sulphuric acid production plants now–a–days utilize double conversion double absorption (DCDA) process. DCDA process can realize above 99% conversion efficiency. The manufacturing process for Sulphuric Acid 98% by the single absorption process and DCDA process are shown in Figure 7–9 and Figure 7–10 respectively.
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