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An in-depth explanation of sodium gluconate
Sodium gluconate, also known as sodium pentahydroxycaproate, is a white or light yellow crystalline powder, easily soluble in water, slightly soluble in alcohol, and insoluble in ether. Its molecular formula is C6H11O7Na and its relative molecular mass is 218.14.
Sodium gluconate is a deeply processed product of glucose and a basic raw material for the preparation of gluconolactone, gluconate (zinc, copper, ferrous salts), etc. It can be used as a nutritional supplement, curing agent, buffer, etc. in the food industry. This product has good thermal stability and no deliquescence. Due to its excellent chelating properties, it is widely used in various industrial sectors such as water treatment, electroplating, metal and non-metal surface cleaning and cement production. It is widely used in chemical industry, food, medicine and so on. , light industry and other industries have a wide range of uses.
Sodium gluconate uses and properties
Used as cement admixture
Adding a certain amount of sodium gluconate to cement can increase the plasticity and strength of concrete, and has a blocking effect, that is, delaying the initial and final solidification periods of concrete. Sodium gluconate can be used as an admixture in concrete. It functions as a water-reducing agent and a retarder in concrete.
Specific application characteristics in construction
1. Using sodium gluconate, the W/C (water to cement ratio) ratio can be reduced, which can increase the strength of concrete. This is a high-quality concrete.
2. Large and heavy pouring projects are difficult to construct. Due to the addition of sodium gluconate, the workability of concrete is improved and the setting time is delayed, which can avoid the occurrence of contact surfaces on the structure, and as a result, the structural strength can be enhanced.
3. It is important to maintain the W/C ratio unchanged and improve workability in hot areas. Large amounts of sodium gluconate were used in the construction of bridges in the Middle East.
4. Adding sodium gluconate to the concrete mixture can delay the setting time, which is very important for long-term and difficult pouring.
5. In the modern concrete industry, ready-mixed concrete is prepared at a central location and then transported using mixer trucks. In this case, it is important to increase workability and initial setting time.
6. Reducing the W/C ratio can produce concrete with higher strength and durability. Sodium gluconate can achieve this purpose. This is very important for high-strength reinforced concrete.
7. Prefabricated masonry mortar must be usable over a long period of time. Adding sodium gluconate can extend the working period.
8. Oil well cementing is difficult to operate due to high temperatures. After adding sodium gluconate, the concrete can work at a temperature of 170°C for several hours.
Used in medicine
Sodium gluconate plays an important role in maintaining extracellular osmotic pressure and capacity, regulating acid-base balance, and exerting normal neuromuscular functions. It can effectively prevent the occurrence of hyponatremia syndrome and is a good sodium food additive (enhancer). ).
Used as water quality stabilizer
Because sodium gluconate has excellent corrosion and scale inhibition effects, it is widely used as a water quality stabilizer, such as as a treatment agent for circulating cooling water systems of petrochemical enterprises, low-pressure boilers, and internal combustion engine cooling water systems.
Used as steel surface cleaning agent
If the steel surface requires galvanizing, chromium plating, tin plating, or nickel plating for special purposes, such as manufacturing tinplate, galvanized sheets, surface chromium plating (electroplating), etc., the surface of the steel billet must be strictly cleaned to ensure that the coating is in contact with the steel surface. Firmly combined, adding sodium gluconate to the cleaning agent at this time will achieve very ideal results.
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