Production and Storage of Sodium Gluconate

When talking about Sodium gluconate, everyone should be familiar with it. Many industries, whether in medicine or construction, are inseparable from sodium gluconate. At this time, there will be problems with the demand for sodium gluconate.  Then how is it produced?

The current production methods of sodium gluconate mainly include four methods: biological fermentation, homogeneous chemical oxidation, electrolytic oxidation, and heterogeneous catalytic oxidation.

Sodium gluconate factory equipments pic

Here we will focus on the biological fermentation method:

It includes mold fermentation and bacterial fermentation, as well as fixed cell fermentation process. At present, the process of producing sodium gluconate by fermentation of Aspergillus niger is commonly used in industrial production.

The process is to add nutrients such as inorganic salts and nitrogen sources to 240-300 g/L glucose solution in proportion, sterilize, cool to an appropriate temperature, inoculate 8-10% Aspergillus niger seed liquid, start stirring , Ventilate, adjust the pH value of the fermentation broth to be maintained at 6.0-6.5, and the temperature to be maintained at 30-36°C for fermentation.

In the fermentation process, the method of adding liquid sodium hydroxide is used to control the pH of the fermentation broth at 6.0-6.5, and the fermentation temperature is controlled at 30-36 ℃ through circulating water. During the fermentation process, add defoamers as needed to eliminate the foam produced during the fermentation process.

The whole fermentation process takes about 25-35 h, and the fermentation ends when the residual sugar drops to 1g/L. After the bacteria are separated from the fermentation broth, the fermentation broth is vacuum concentrated and crystallized to obtain sodium gluconate crystals, or spray-dried to obtain sodium gluconate powder products.

This method has the characteristics of fast fermentation speed, easy control of the fermentation process, easy product extraction, stable and gentle production, easy large-scale industrial production, and conforms to the current trend of biological development, but it also has certain shortcomings, such as difficult control of product color and sterilization The requirements are high.

After reading this method, do you feel that the production of sodium gluconate is not simple, and the technical requirements that need to be controlled are very strict.

How to store Sodium gluconate ?
Sodium gluconate has a great effect, especially for concrete. So what are the things to pay attention to when buying sodium gluconate in the peak season? Let’s take a look at Bailin Group Co., Ltd. below:

As an admixture for concrete, sodium gluconate can reduce the heat of hydration of concrete and delay the moment when the temperature peak appears, reduce the cracking caused by the temperature difference between the surface and the inside, and avoid the effects of cracks. Therefore, it is often an indispensable product in summer construction.

With the gradual increase in temperature, the peak season for sodium gluconate has arrived. At this time, Bailin Group Co., Ltd. will explain the precautions for the storage of sodium gluconate to avoid improper storage after procurement.

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