Sodium gluconate is an organic compound widely used in both industrial and food industries. It is mainly used as a food additive, an efficient chelating agent in industries such as construction, textile printing and dyeing, metal surface treatment, and water treatment. It is also used as a steel surface cleaning agent, glass bottle cleaning agent, aluminum oxide coloring agent in electroplating industry, and as an efficient retarder and water reducer in concrete industry.
1.Sodium gluconate can prolong the setting time of concrete, reduce its slump and loss over time, and improve its strength in concrete applications. It can be applied in pumped concrete, high fluidity concrete, large volume concrete, and high-strength performance concrete.
The specific applications are as follows:
(1) The use of sodium gluconate can reduce the water cement ratio, thereby improving 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 improvement of concrete workability and the delay of solidification time can avoid the formation of interface surfaces in the structure, resulting in an increase in structural strength.
(3) Maintaining a constant water cement ratio is of great significance in improving the processability of high-temperature areas. A large amount of sodium gluconate was used in bridge construction in the Middle East.
(4) Adding sodium gluconate to concrete mixtures can delay the setting time, which is 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 out by a mixer truck. In this case, increasing workability and initial setting time are very important.
(6) Reducing the w/c ratio can produce concrete with higher strength and durability, and sodium gluconate can achieve this goal. This is crucial for high-strength reinforced concrete.
(7) Prefabricated mortar for masonry must be used for a long time. Adding sodium gluconate can prolong working time.
(8) The temperature of the oil well irrigation mud is high, making it difficult to operate. After adding sodium gluconate, concrete can work for several hours at 170 ℃.
2. Sodium gluconate is a new functional flavoring agent in the food industry. It can give food a sour taste, act as a stabilizer for adjusting food pH, improve food taste, prevent protein denaturation, mask unpleasant bitterness and astringency, and can replace salt to produce low sodium and sodium free food.
The taste and unique functions shared by sodium gluconate and potassium gluconate have greater advantages than other organic acids. Organic acids such as sodium malate, sodium citrate, and sodium lactate are used in food processing for pH seasoning and improving taste. But these organic hydrochloric acids have low taste and affect the taste and quality of food. Sodium gluconate and potassium gluconate are used as pH buffering agents in food processing, which can complete the sterilization process of beverages at pH 4, sterilization temperature 65 ℃, and 10 minutes without affecting the taste. However, other organic acid salts are difficult to meet this requirement. The combination of sodium gluconate and aspartame extract can achieve a taste similar to sugar. Sodium gluconate has a significant or masking effect on soy protein odor, fish odor, and trace metal elements such as magnesium, iron, and zinc, especially the unique bitter taste of magnesium.
The salt taste of sodium gluconate is close to that of table salt, with a threshold of 5 times that of table salt, 2.6 times that of sodium malate, and 16.3 times that of sodium lactate. The amount used in food processing is much less than other sodium salts such as sodium malate. In addition, sodium gluconate has excellent taste quality such as no irritation and no bitter taste. It is used to adjust pH and improve food taste and characteristics, making it an excellent organic acid sodium salt.
Replacing 100% salt with sodium gluconate can produce salt reduced bread or salt free bread. Sodium gluconate can also be used as a substitute for salt in food processing to improve properties, adjust fermentation, endow food with various functions such as preservation and dehydration.
3. Sodium gluconate, as a corrosion inhibitor, increases its corrosion inhibition rate with increasing temperature, while most other corrosion inhibitors decrease or fail with increasing temperature. When the temperature increases from 21 ℃ to 49 ℃ in the corrosion inhibition of carbon steel and other materials, the corrosion inhibition rate increases by more than 5%.
4. Sodium gluconate, as a scale inhibitor, has extremely strong scale inhibition ability. Due to its strong chelating ability for Ca, Mg, Fe, etc., especially for iron ions, it has excellent chelating ability and works almost in the entire pH range.
5. Sodium gluconate has broad-spectrum and coordinating effects. It is not only suitable for molybdenum series formulas, but also for silicon, phosphorus, boron, tungsten, nitrite and organic carboxylic acid formulas.
6. Sodium gluconate is used as an electroplating additive in the electroplating industry, which can be operated at higher temperatures and can directly deposit a shiny gold coating without the need for polishing or chrome plating, with good rust removal performance.
7.In the development industry, adding an appropriate amount of sodium gluconate to the developer can make the image clear and stain free.
8.Sodium gluconate is a good stabilizer in the field of water treatment.
9. Sodium gluconate has a good washing effect in the field of glass bottle washing, and its superiority is outstanding, making it an excellent cleaning agent.
10. Sodium gluconate in the medical industry can regulate the acid-base balance in the human body. Sodium plays an important role in maintaining extracellular osmotic pressure and capacity, and plays a normal role in the function of neuromuscular systems, effectively preventing the occurrence of hyponatremia syndrome.
In short, sodium gluconate, as an important chemical substance, plays an indispensable role in various fields. We should fully utilize its excellent performance and broad application prospects, while paying attention to its potential risks, to ensure its safe, effective, and sustainable development in various fields. With the continuous advancement of science and technology and the increasing demand for quality of life, it is believed that sodium gluconate will demonstrate its unique value and charm in more fields.