Preparation of fuming sulfuric acid product

Preparation of fuming sulfuric acid products:

   20% fuming sulfuric acid can be produced in the sulfuric acid plant of the contact method, that is, the sulphuric acid absorption tower is arranged before the 98.3% sulfuric acid absorption tower, and the gas containing 7%-10% of sulfur trioxide is absorbed and absorbed by 20% fuming sulfuric acid. At the same time, 98.3% sulfuric acid was added to the circulating acid to keep the concentration constant. 65% fuming sulfuric acid can be obtained by mixing 20% fuming sulfuric acid and liquid sulfur trioxide, or according to the manufacturing method of 20% fuming sulfuric acid, establishing an absorption tower sprayed with 65% fuming sulfuric acid cycle, absorbing 100% trioxide Sulfur gas, plus 20% fuming sulfuric acid to adjust the circulating acid concentration.

   Chemical Chinese name: fuming sulfuric acid

   Chemical name: sulphuric acid fuming

   English name: Oleum

   Technical specification code: 934

   CAS No.: 8014-95-7

   Molecular formula: H2SO4·xSO3

   Molecular weight: 98+x (80.06)

   Use of inspection

   Weigh the ampoule (accurate to 0.001 g), then bake the hot ball on the micro-fire, quickly insert the capillary into the sample, inhale about 0.4g -0.7g, and immediately use the flame to push the top of the capillary Sintering is closed, and the acid on the outer wall of the capillary is baked with a small fire and reweighed.

   The weighed ampoules are placed in a 500m Erconical flask filled with 100m of water, plugged into the stopper, shaken vigorously to crush the ampoule, and continue to shake until the misty sulfur trioxide gas Disappear, open the cork, rinse the stopper with water, then gently crush the capillary of the ampoules with a glass rod, rinse the bottle neck and glass rod with water, and set aside.