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Application of Sodium Gluconate in Construction Industry
Source: | Author:a | Published time: 2022-04-21 | 994 Views | Share:

Sodium gluconate is an organic compound with a chemical formula of C6H11NaO7. Sodium gluconate, also called sodium salt of gluconic acid, Gluconic acid,sodium salt,is produced by fermentation of glucose. . It is widely used in industry. Sodium gluconate can be used as a high-efficiency chelating agent in construction, textile printing and dyeing, metal surface treatment and water treatment industries. Steel surface cleaning agent, glass bottle cleaning It is used as a high-efficiency retarder and a high-efficiency water reducer in the concrete industry.

Concrete is a composite material made of cement, aggregates, admixtures and water. Concrete is the largest amount of any man-made material. Three-quarters of concrete is aggregate, yet the most active ingredient in concrete is grout. The properties and properties of concrete are mainly determined by the properties of the cement paste. Admixtures in concrete can provide some beneficial effects such as accelerating solidification, delaying solidification, making air bubbles, reducing water consumption and increasing plasticity. Often several admixtures are used simultaneously in cement, and various 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 reducer 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. are produced under properly defined and controlled conditions. This compound is chemically pure and non-corrosive. Quality is constant. These features ensure reliable and repeatable results in the application.

Sodium Gluconate as Water Reducer

By adding a water reducing agent, the water-cement ratio (W/C) can be reduced. The following effects can be obtained by adding sodium gluconate: 1. Improve workability. The addition of sodium gluconate can improve the workability under the condition that the water-cement ratio (W/C) remains unchanged. At this time, sodium gluconate acts as a plasticizer. When the addition amount of sodium gluconate is below 0.1%, the degree of its improved workability is proportional to the addition amount. 2. Increase strength. The water content in the concrete can be reduced (ie W/C is reduced) when the cement content remains the same. When the amount of sodium gluconate added is 0.1%, the amount of water added can be reduced by 10%. 3. Reduce cement content. The water and cement contents were decreased in the same proportion, and the W/C ratio remained unchanged.

Sodium gluconate as retarder

Sodium gluconate can significantly delay the setting time of concrete. When the dosage is below 0.15%, the logarithm of the initial setting time is proportional to the dosage, that is, when the dosage is doubled, the initial setting time is delayed ten times, which enables the working time to be reduced from a few Hours to days without compromising strength. This is an important advantage, especially on hot days and longer periods of time.

Used as a special cleaning agent for glass bottles

Beverage industry, food industry, brewing industry, hundreds of millions of glass bottles, such as soda bottles, beer bottles, milk bottles, canned bottles, soy sauce bottles, wine bottles, etc., its cleaning is a very important thing, cleaning Drug formulation is a difficult technical work. An ideal drug has not yet appeared in China. The main problems are: the detergency is not strong, and it is easy to block the nozzles and pipelines of the bottle washer; the de-staining ability to bottle stickers and bottle neck rust is not ideal; the trace residues after washing are not ideal for food safety (such as phosphates). residues); washing water is discharged into public nuisance (cannot meet the standards set by the state). If sodium gluconate is used as the main body in the pharmaceutical formula of its glass bottle cleaning agent, the above problems can be solved easily. (In the 1980s, large-scale tests have been done in Shanghai Soda Factory and Shanghai Brewery, and there are identification certificates.) The application of this aspect has not been developed in China, and if it forms a market, it has great potential.

Used as water stabilizer

Due to its excellent corrosion and scale inhibition properties, sodium gluconate is widely used as a water stabilizer, for example, as a treatment agent for circulating cooling water systems in petrochemical enterprises, low-pressure boilers, and cooling water systems for internal combustion engines. Because it has the following specific advantages: ⑴ has obvious coordination effect. It is suitable for formulas such as molybdenum, silicon, phosphorus, tungsten and nitrite. Due to the coordination effect, the corrosion inhibition effect is greatly improved. (2) The corrosion inhibition rate increases with the increase of temperature. Generally, the corrosion inhibition rate decreases with the increase of temperature, or even loses its effect completely. But sodium gluconate is just the opposite. 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, when the temperature rises from 77°F to 120°F, the buffer rate increases by 5% on average. above. Therefore, the unique characteristic of sodium gluconate is ideal for use as a corrosion inhibitor for higher temperature systems or variable temperature systems from low temperature to high temperature. (3) Strong anti-scaling ability: It has strong complexing ability for calcium, magnesium and iron salts, so it has strong anti-scaling ability, especially has excellent chelating effect on Fe3+, even in the whole PH range. ⑷ eliminate public nuisance. The use of sodium gluconate as a corrosion and scale inhibitor for circulating cooling water can eliminate pollution, which is an incomparable advantage of other corrosion and scale inhibitors used.

for medicine

Regulates the acid-base balance in the human body to restore the normal function of nerves, and can also be used as a food additive for the same purpose.


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