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Sodium gluconate | Usage and Synthetic method :

Sodium gluconate : CAS No.: 527-07-1

Molecular formula: C6H13NaO7 Molecular weight: 220.15 EINECS number: 208-407-7

Introduction:

Sodium gluconate is a common and widely used sodium salt of organic acids. Industrial grade sodium gluconate is often used in construction, chemical and other industries.

In the construction industry, it is often used as a cement additive to reduce water and retard the setting. In the chemical industry, it is used to produce other gluconate, gluconic acid and gluconic acid. 

The basic raw material of lactone also has good applications in electroplating, cleaning agent, film manufacturing, water quality treatment, etc.; 

Food-grade Sodium gluconate is often used in food and pharmaceutical industries, and in the food industry, it is used as a food additive to regulate Taste, adjust acidity, dehydration, solidification, etc. In the pharmaceutical industry, it can adjust the acid-base balance and maintain extracellular osmotic pressure.

According to statistics, the global Sodium gluconate output in 2021 will be about 625,000 tons. The main manufacturers of sodium gluconate in China which include Shenyang Bailin Technology Co. Bailin Group, In recent years, the annual production and sales volume of Sodium gluconate has been maintained at about 200,000 tons. The product is sold all over the country and overseas markets, and are exported to Vietnam, India, Saudi Arabia, Israel and other countries and regions all year round, and have won unanimous praise from customers.check product website : https://www.bailincorp.com/Product/sodium_gluconate

Physical and chemical properties:

Sodium gluconate, also known as sodium pentahydroxyhexanoate, is a white or light yellow crystalline powder, easily soluble in water, slightly soluble in alcohol, and insoluble in ether. Sodium gluconate is a deep-processing product of glucose, and is also the basic raw material for the preparation of gluconolactone, gluconate (zinc, copper, ferrous salt), etc. 

It can be used as a nutritional supplement, curing agent, buffer, etc. in the food industry. The 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 used in chemical, food, and pharmaceutical industries. , light industry and other industries have a wide range of uses.

In industry, substances containing glucose (such as grains) are generally used as raw materials, and gluconic acid is first produced from glucose by fermentation, and then neutralized by sodium hydroxide to obtain sodium gluconate. Electrolysis and oxidation can also be used. synthesis. Most of our country adopts chemical oxidation method - hypobromine oxidation method to produce and synthesize. Sodium gluconate is non-toxic. Sodium gluconate and its chelates with heavy metal ions existing in water can be rapidly and completely degraded by common biochemical treatment. The heavy metal ions released during the degradation process can be removed by precipitation or adsorbed on the sludge formed during the wastewater treatment process.

The main usages:

Sodium gluconate is widely used in industry and food. Sodium gluconate can be used as high-efficiency chelating agent, steel surface cleaning agent, glass bottle cleaning agent, aluminum oxide coloring in electroplating industry, etc. in industries such as construction, textile printing and dyeing, metal surface treatment and water treatment. , used as high-efficiency retarder, high-efficiency water reducer, etc. in the concrete industry.

Used as a steel surface cleaning agent, if the steel surface needs to be plated, chrome-plated, tin-plated, nickel-plated for special purposes, such as manufacturing tinplate, galvanized sheet, surface chrome-plated (electroplating), etc., the surface of the steel billet must be strictly cleaned. To make the coating and the steel surface firmly combined, adding sodium gluconate to the cleaning agent will achieve a very ideal effect. 

Used as cement admixture After adding a certain amount of sodium gluconate to cement, it can increase the plasticity and strength of concrete, and has a retarding effect, that is, to delay the initial and final setting time of concrete; 

It can be used as a special cleaning agent for glass bottles with gluconic acid Sodium-based glass bottle professional cleaning agent can improve the following common problems: weak detergency, easy to block the nozzle and pipeline of the bottle washing machine;  Used as a water quality stabilizer Because sodium gluconate has excellent corrosion and scale inhibition effects,

It is widely used as a water quality stabilizer, for example, as a treatment agent for circulating cooling water systems in petrochemical enterprises, low-pressure boilers, and internal combustion engine cooling water systems. Because of its following specific advantages:

(1) It has obvious coordination effect. It is suitable for formulations of molybdenum, silicon, phosphorus, tungsten, nitrite, etc. 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 of the corrosion inhibitor decreases with the increase of temperature, or even completely loses its effect. But sodium gluconate is just the opposite, and the corrosion inhibition rate increases with the increase of temperature within a certain range.

(3) Strong anti-scaling ability: It has strong complexing ability for calcium, magnesium, and iron salts, so it has strong anti-scaling ability, especially for Fe3+, it has excellent chelating effect, even within the entire pH range.

⑷ Elimination of public hazards. Sodium gluconate is used as a corrosion and scale inhibitor for circulating cooling water to eliminate pollution, which is an incomparable advantage of other corrosion and scale inhibitors currently used.

Sodium gluconate used in the food industry can replace salt:

The salt taste of sodium gluconate is close to that of salt, but the molecular weight of sodium is only 10.5%. Compared with salt, the amount of sodium in the former is only 1/4 of the latter. Moreover, compared with other low-sodium salts, sodium gluconate has the advantages of non-irritation, no bitterness, salty taste, etc., and has become the best substitute for salt. At present, it is widely used in food fields such as unsalted soy sauce and bread. In white bread, the complete replacement of sodium chloride by sodium gluconate will not cause a difference in bread volume, nor will it affect its overall flavor and shelf life. 

Sodium gluconate can improve food flavor: Sodium gluconate has the functions of masking food bitterness, shielding odor, improving taste, etc., and has a significant effect on improving food flavor. By adding sodium gluconate to the low-fat cheese, the original bitterness and astringency of the low-fat cheese are eliminated, and the overall taste is improved. By comparing the flavor of lactone tofu made with sodium gluconate and gypsum as a coagulant, it was found that the tofu made with sodium gluconate was more tender, with higher taste and nutritional value. 

Sodium gluconate can enhance the nutritional properties of food: it can enhance the nutritional properties of food. For example, through in-depth research on cheese hardening。

It is found that sodium gluconate can form a soluble complex with calcium ions and lactate ions in cheese, thereby increasing the solubility of calcium lactate, which not only effectively prevents cheese hardening, but also ensures the nutritional quality of cheese.