Tianjin Wolfsea International Co.,Ltd.

soda ash for food grade

• Category :

  Food and Feed additives

• CAS NO :

  2836200000

• EC NO :

• Molecular Formula :

• Molecular Weight :

• Main Specifications :

  99.2% min

• Packing :

  25kg/40kg/50kg/1,000kg per bag, 20MT/20’ft container without pallet and 17.5MT/20’ft container with pallet or as per customer’s requirement

• Product description :

  Soda ash for food grade
  Molecular formula: Na2CO3
  Cas No.: 497-19-8
  H.S.Code: 283620000
  Molecular weight: 105.99 (in accordance with the international association of relative atomic mass in 1999)
  Application: mainly used in chemical industry, glass-manufacturing, metallurgy, paper-manufacturing, textile, dyeing, synthetic detergent, soap, daily-use Chemical-industry, daily-use glass industry, washing powder, petrochemicals industry etc.
   
  Commodity: soda ash for food Grade：

  spec.	Standard (%)	Result (%)
  Na2CO3	≥99.2	99.40-99.60
  NaCL	≤0.7	0.35-0.55
  Fe	≤0.0035	0.00090-0.0015
  SO4	≤0.03	≤0.03
  Moisture Content %	0.1%-0.4%	0.1%-0.4%
  Water Insoluble Matter%	≤0.03	0.0090-0.015
  Heavy Metal (As Pb) %	≤0.001	﹤0.001
  Arsenic(%)	≤0.0002	﹤0.0002

  Packing: 25kg/40kg/50kg/1,000kg per bag, 20MT/20’ft container without pallet and 17.5MT/20’ft container with pallet or as per customer’s requirement
   
  Manufacturing Process
  1)Solvay process:
  Solvay Process centered around a large hollow tower. At the bottom, calcium carbonate (limestone) was heated to release carbon dioxide.
  CaCO3 → CaO + CO2
  At the top, a concentrated solution of sodium chloride and ammonia entered the tower. As the carbon dioxide bubbled up through it, sodium bicarbonate precipitated:
  NaCl + NH3 + CO2 + H2O → NaHCO3 + NH4Cl
  The sodium bicarbonate was then converted to sodium carbonate by heating it, releasing water and carbon dioxide:
  2NaHCO3 → Na2CO3 + H2O + CO2
  Meanwhile, the ammonia was regenerated from the ammonium chloride byproduct by heating it with lime (calcium hydroxide) left over from carbon dioxide generation:
  CaO + H2O → Ca(OH)2
  Ca(OH)2 + 2NH4Cl → CaCl2 + 2NH3 + 2H2O
   
  2)Combined Production Process (Hou’s Process)

  It is the same as the Solvay Process in the first few steps. But instead of treating the remaining solution with lime, carbon dioxide and ammonia is pumped into the solution and sodium chloride is added until it is saturated at 40 degree C. Then the solution is cooled down to 10 degree C. Ammonium chloride precipitates and its removed by filtration, the solution is recycled to produce more sodium bicarbonate. Hou’s eliminates the production of calcium chloride and the byproduct ammonium chloride can be used as a fertilizer.