Sodium gluconate is a kind of organic matter, chemical formula C6H11NaO7, in the industry is very widely used, sodium gluconate can be used in construction, textile printing and dyeing and metal surface treatment and water treatment industries as efficient chelating agent, steel surface cleaning agent, glass bottle cleaning agent, electroplating industrial aluminum oxide coloring, in the concrete industry as a high efficiency retarding agent, high efficiency water reducing agent.
Apply
Used as a cleaning agent for steel surface:
Steel surface such as the need for plating bowl, chromium plating, tin plating, nickel plating to adapt to special uses, such as the manufacture of tinplate, galvanized plate, surface chromium plating (electrical), etc., the billet surface are strictly cleaned, so that the coating and steel surface firmly combined, at this time the cleaning agent to add sodium gluconate will achieve very ideal results. This has been confirmed by the major companies in the international manufacture of tinplate.
Used as cement admixture:
Adding a certain amount of sodium gluconate to cement can increase the plasticity and strength of concrete, and has blocking effect
That is, delaying the initial and final solidification period of concrete, such as adding 0.15% sodium gluconate, can extend the initial solidification time of concrete by more than 10 times, that is, extend the plastic time of concrete from a few hours to a few days, without affecting its stiffness. Plasticity and delay of initial setting time are very important problems in concrete work, such as in high temperature season construction and large-scale engineering work, delay of initial setting time is a difficult problem, sodium gluconate can solve this problem. In addition, it is difficult to glue oil Wells at high temperatures, and the concrete after adding sodium gluconate can be plastic in a few hours at a high temperature of 170ºC, so the above problems can be successfully solved. Therefore, sodium gluconate as a cement admixture has been widely used in important construction projects abroad, such as a large number of bridge projects in the Middle East. However, our domestic application in this area has not yet been promoted, it is said that there is the extraction of cellulose sodium su
lfonate in papermaking wastewater, and its effect is simply not comparable to sodium gluconate.
In addition, it can also be used in electroplating and film manufacturing industries.
As a kind of polyhydroxy-carboxylic acid excellent corrosion and scale inhibitor sodium gluconate, because of its many special properties, if it can work hard in the application technology, it will be developed into a large industry.
Application of sodium gluconate in construction industry
Concrete is a composite material made of cement, aggregate, admixture and water. Concrete is the most abundant of all man-made materials. Three quarters of concrete is aggregate, but the most active component in concrete is cement slurry. The properties and properties of concrete are mainly determined by the properties of cement slurry. The admixture in concrete can provide some beneficial effects such as accelerating solidification, delaying solidification, making air into a bubble, reducing water consumption and increasing plasticity. It is common to use several admixtures in cement at the same time, and the different admixtures can reinforce each other in some applications.
Sodium gluconate can be used as an admixture in concrete, and its functions in concrete are as follows: water reducing agent and retarder
Sodium gluconate is generally used alone, but can also be used in combination with other retarders such as carbohydrates and phosphates. Sodium gluconate is a crystalline powder. It is produced under properly regulated and controlled conditions. This compound is chemically pure and non-corrosive. The mass is constant. These characteristics guarantee reliable and repeatable results in applications.
Sodium gluconate as a water reducer
The water-cement ratio (W/C) can be reduced by adding a water-reducing agent. The following effects can be obtained by adding sodium gluconate: 1. Improve workability. When the water-cement ratio (W/C) remains unchanged, adding sodium gluconate can improve workability. At this time, sodium gluconate acts as a plasticizer. When the amount of sodium gluconate is less than 0.1%, the degree of improvement in workability is proportional to the amount added. 2. Increase intensity. The water content in the concrete can be reduced (i.e. W/C is reduced) while the cement content remains constant. When the amount of sodium gluconate is 0.1%, the amount of water added can be reduced by 10%. 3, reduce the cement content. The water and cement content is reduced in the same proportion, and the W/C ratio remains the same.
Sodium gluconate as a retarder
Sodium gluconate can significantly delay the setting time of concrete. When the dosage is less than 0.15%, the logarithm of the initial setting time is proportional to the dosage, that is, the dosage is doubled, and the initial setting time is delayed to ten times, which extends the working time from a few hours to a few days without damaging the strength. This is an important advantage, especially on hot days and for long periods of time.
Used as a special cleaning agent for glass bottles
Beverage industry, food industry, brewing industry of hundreds of millions of glass bottles, such as soda bottles, beer bottles, milk bottles, cans, soy bottles, wine bottles, etc., its cleaning work is a very important thing, cleaning agent formula is a difficult technical work. There is not yet an ideal medicine in China. The main problems are: cleaning force is not strong, easy to block the bottle washing machine nozzle and pipeline; The removal of rust on bottle stickers and bottlenecks is not ideal; The trace residue after washing is not ideal for food safety (such as phosphate residue); Washing water discharge as a public hazard (can not meet the national standards). If the pharmaceutical formulation of the glass bottle cleaning agent is changed to sodium gluconate as the main body, the above problems can be solved. (In the 1980s, large-scale tests have been carried out in Shanghai soda water factory and Shanghai brewery, and there is identification proof) The application of this aspect has not been developed in China, and if it forms a market, it has great potential.
Used as a water quality stabilizer
Because sodium gluconate has excellent corrosion inhibition and scale inhibition, it is widely used as a water quality stabilizer, such as as a treatment agent for circulating cooling water systems in petrochemical enterprises, low-pressure boilers, and internal combustion engine cooling water systems. Because it has the following specific advantages: (1) has an obvious coordination effect. Suitable for molybdenum, silicon, phosphorus, tungsten, nitrite and other formulations, due to the coordination effect, the corrosion inhibition effect is greatly improved. (2) The corrosion inhibition rate increases with the increase of temperature. The corrosion inhibition rate of general corrosion inhibitors decreases with the increase of temperature, or even completely loses its effect. However, sodium gluconate is on the contrary, the corrosion inhibition rate increases with the increase of temperature within a certain range, for example, in the test of carbon steel and other materials, the temperature rises from 77ºCF to 120ºCF, and the buffer rate increases by more than 5% on average. Therefore, this strange property of sodium gluconate is ideal for the use of corrosion inhibitors in higher temperature systems or temperature changing systems from low to high temperature. (3) Strong scale inhibition ability: calcium, magnesium, iron salt has a strong complexing ability, so the scale inhibition ability is very strong, especially for Fe3+ has excellent chelation, and even has a role in the whole PH range. (4) Eliminate public hazards. The use of sodium gluconate as a corrosion and scale inhibitor in circulating cooling water can eliminate public hazards, which is an incomparable advantage of other corrosion and scale inhibitors used.
medicinally
Regulating the acid-base balance in the human body to restore the normal function of nerves can also be used as a food additive for the same purpose.
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