Tradeasia has decades of experience in sourcing and selling sodium carbonate from world renowned sources situated in Europe, China, Russia, Turkey. You can get soda ash dense specification from Specification tab. Soda ash Dense is manufactured using following process.

Solvay process

The Solvay process is also known as ammonia soda process. It was developed by the Belgian Ernest Solvay (1838 – 1932) in 1861. It reduced operating cost and environmental impact. It is most accepted technology for producing synthetic sodium carbonate because the investment and maintenance costs are low compared to other processes. The Solvay procedure is still the dominant production route for soda ash. Basic raw materials that are used in this process include salt, limestone and coke or natural gas and also ammonia as a cyclic reagent. In this process the ammonia reacts with carbon dioxide and water to form ammonium bicarbonate. The ammonium bicarbonate is then reacted with salt to form sodium bicarbonate, which is calcinated to form sodium carbonate. Chloride is formed as a byproduct and is neutralized with lime to produce calcium chloride. Almost all the ammonia used in the reactions is recovered and recycled. The Solvay process can be summarized by the following theoretical global chemical reaction, which involves two main components which are sodium chloride and calcium carbonate. 2NaCl + CaCO3 → Na2CO3 + CaCl2. The above reaction cannot be applied directly in practice. The Solvay process needs the use of other substances and also many different procedure steps before getting to the final product which is soda ash ( NaHCO3 ). Solvay process includes the following stages:

1.Production of a saturated salt solution. NaCl + H2O 2. Burning of limestone and the CO2 recovered while CaO is used in stage 7 CaCO3 → CaO + CO2 3. Saturation of the salt solution with ammonia NaCl + H2O + NH3 + CO2 4. Precipitation of bicarbonate by adding carbon dioxide NaCl + H2O + NH3 + CO2 → NH4Cl + NaHCO3 5. Filtration and washing of sodium bicarbonate 6. Thermal decomposition of sodium bicarbonate to sodium carbonate 2NaHCO3 → Na2CO3 + H2O + CO2 7. Production of milk of lime CaO + H2O → Ca(OH)2 8. Recovery of ammonia by distillation of the mother liquor from stage 4 with milk of lime 2NH4Cl + Ca(OH)2 → 2NH3 + CaCl2 + 2H2O Hou’s process

It is developed by Chinese chemist Hou Debang in the 1930s. The earlier steam reforming by-product carbon dioxide. It was pumped through a saturated solution of sodium chloride and ammonia to produce sodium bicarbonate. Via the following reactions: NH3 + CO2 + H2O → NH4HCO3 .

NH4HCO3 + NaCl → NH4Cl + NaHCO3 The sodium bicarbonate was collected as a precipitate due to its low solubility. Then heated to yield pure sodium carbonate similar to last step of the Solvay process. More sodium chloride is added to the remaining solution of ammonium and sodium chlorides. Also, more ammonia is pumped at 30-40°C to this solution. The solution temperature is then lowered to below 10°C. Solubility of ammonium chloride is higher than that of sodium chloride at 30°C and lower at 10°C. Due to this temperature dependent solubility difference and the common-ion effect, ammonium chloride is precipitated in a sodium chloride solution. The Chinese name of Hou’s process means “Coupled Manufacturing Alkali Method”. Hou’s process is coupled to the Haber process and offers better atom economy by eliminating the production of calcium chloride. Since, ammonia no longer needs to be regenerated. The by-product ammonium chloride can be sold as a fertilizer.

Dense Soda Ash is a widely used chemical across various industries, owing to its versatility. It is one of the most important industrial chemicals.


It is used as a water softener in laundry detergents. Soda ash competes with ionic magnesium and calcium in hard water and prevents them from combining with the detergent being used. If you do not use washing soda, you need an extra detergent to soak up magnesium and calcium ions. In the detergent part of the washing shop called washing soda or Sal soda, it can effectively remove oil, grease and alcohol stains. Medium or lighter soda ash is commonly used in detergents. They are used as builders in the formulation of soaps, detergents and other cleaning compounds to maximize the detergency of cleaning media. Soda ash also aids in agglomeration by carrying the surfactant and providing the optimum pH of the detergent. Soda ash is an important part of a large number of domestic formulations, including soap, refined powder, soaking and washing powder.

Glass manufacturingsoda ash dense Glass industry

The most important use of dense soda ash is in the manufacturing of glass. Soda ash is an essential constituent in this process as it maintains the furnace temperature necessary to melt the silica, thus reducing the energy required to produce glass. It is generally used to supply the bulk of the alkali element because it is the most cost effective source of  Na2O

CHEMICAL INDUSTRYchemical industry

Soda ash is widely used in the domestic chemical processing industry. It is a source of sodium ions in the production of sodium phosphates, sodium silicates, chrome chemicals and photographic chemicals. It’s also used in the production of sodium bicarbonate (also known as baking soda), which is an essential ingredient in beverages, coatings, detergents, food, dialysis, and personal care markets.

PAPER INDUSTRYchemtradeasia paper industry

Soda Ash Dense is used in paper making, to soften the wood chips and control the pH level in the pulp cooking process.


Soda ash dense uses in water treatment at the domestic stage as it helps control the water’s pH levels and also softens it.

It is also used in soap and detergent industry though soda ash light is preferred over soda ash dense in detergent industry.

Sodium Carbonate Specification

Synonyms:Soda ash dense, Carbonic acid, disodium carbonate, soda ash
CAS No.:497-19-8
Molecular Weight:105.99
Sodium Carbonate Formula :Na2CO3
Appearance:white odorless, granular
Total Base Content:99.2% min (as Na2CO3 on Dry Base)
SODIUM OXIDE:58.1% min (as Na2O on Dry Base)
SODIUM CHLORIDE:0.05% max (as NaCl on Dry Base)
SODIUM SULFATE:0.15% max (as Na2SO4 on Dry Base)
BULK DENSITY:800 – 1100kg/m3
< 0.065 mm:2.0% max
< 0.125 mm:5.0% max
< 0.25 mm:60.0% max
< 0.5 mm:60.0% min
< 1.0 mm:95.0% min
Packing:Light : 25kgs, 500kgs, Dense : 50kgs, 1mt in Bag
Hazard Class:Not regulated

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