Sodium gluconate is an organic substance, which is composed of many hydroxyl groups, which is called sodium pentahydroxyate. The chemical formula is c6h11nao7; Molecular weight: 218.14; Melting point: 206-209 ℃; The appearance is white or brownish yellow crystalline particles or powder, which is very soluble in water, slightly soluble in alcohol and not soluble in ether.
Sodium gluconate is widely used in industry. can be used as high-efficiency chelating agent, steel surface cleaning agent, glass bottle cleaning agent, aluminum oxide coloring in electroplating industry, high-efficiency retarder and high-efficiency water reducer in construction, textile printing and dyeing, metal surface treatment and water treatment industries.
In food industry sodium gluconate is used as gelatinizer, thickener and coagulant in health food such as ice cream, beverage, molded food, meat products and jam.
Sodium gluconate pharmaceutical grade is used for adhesives, biological adhesives, sustained-release and controlled-release tablets, medical dressings, dental impression materials, curing agents, etc.
In industry, glucose containing substances (such as grains) are generally used as raw materials. Glucose acid is prepared from glucose by fermentation method, and then neutralized by sodium hydroxide to obtain sodium gluconate. It can also be synthesized by electrolysis and oxidation. Chemical oxidation and hypobromine oxidation are mostly used in China.
According to the different types of fermentation enzymes used, the fermentation method can be divided into two minutes. One is the enzyme of Aspergillus niger, and the other is acid. The latter method forms lactone by dehydrogenation of glucose, and then decomposes the ester.
Sodium gluconate can also be obtained directly from glucose fermentation. At this time, the composition of fermentation base can be: glucose 250 ~ 350g / L, magnesium sulfate heptahydrate 0.2 ~ 0.3g/l, diammonium hydrogen phosphate or urea 0.4 ~ 0.5g/l. This substrate must be sterilized. In the fermentation process, the temperature is controlled at 30-32 ℃, the pH is controlled at 5.5-6.5 by 30% ~ 50% sodium hydroxide, and the fermentation process lasts for 40 ~ 100h. Then, the microorganisms are removed by filtration and washing, activated carbon decolorization, re filtration, concentration or spray drying to obtain the finished product.
Glucose is not dangerous. It is non-toxic. Industrial glucose is whole sugar or food grade glucose. White block solid, sweet. Solid ≥ 80%, de ≥ 95. The products are widely used in sewage treatment, medicine, chemical industry, food, microbial fermentation and other industries
Is sodium gluconate a compound?
Sodium gluconate is a very effective compound. It is widely used in industry. For example, it can be used as a cleaning agent for steel surface and can also color chlorine and oxygen in electroplating industry.