1, the basic information
Chinese name : Sodium gluconate
Chinese alias : D- glucose , sodium
Name : Gluconic acid, sodium salt
English Name : SODIUM GLUCONATE RE; Gluconic Acid Sodium; Sodium gluconate; sodium 2,3,4,5,6-pentahydroxyhexanoate (non-preferred name)
CAS No. :527 -07-1
EINECS No. :208 -407-7
Formula : C6H11NaO7
Molecular Weight : 218.14
Melting point :206-209 ℃
Appearance: white crystalline powder or granules.
Solubility: easily soluble in water , slightly soluble in alcohol, can not soluble in ether.
Specifications : Complies with FAO standard FAO / WHO; USPXX Ⅲ version ; corporate standards ; also according to customer requirements.
Packing : 5Kg plastic woven bags ; also according to customer requirements.
Uses:
One for medicine, you can adjust the acid-base balance in the human body to restore nerve function normally , for the same purpose , used in food additives ;
Water is used as a stabilizer , and its superiority in:
⑴ obviously coordinated effects, for molybdenum, silicon, phosphorus , tungsten, nitrite , and other formulations , the coordination Effect , inhibition effect of greatly increased ;
⑵ contrast with the general corrosion , corrosion rate increases with increasing temperature ;
⑶ scale technical ability requirements for calcium, magnesium , iron has a strong complexing ability , particularly Fe3 + has an excellent chelating ;
Steel surface cleaning agent : steel surface plated bowl as needed , chrome , tin , nickel- plated to suit the special purpose , its slab surface shall be rigorously cleaned , the coating material combined with a solid steel surface , this time adding its cleaning agents sodium gluconate will achieve very good results ;
Pipeline ; rust on the bottle labels and bottlenecks to dye force is not ideal ; washed trace residues on food security is not ideal ( such as phosphate residues ) ; wash water discharged into public nuisance ;
2 , the indicator
Content ≥ 98% ≥ 98% ≥ 98.5%
Chloride – ≤ 0.07% ≤ 0.05%
Arsenic ≤ 3P.P.M ≤ 3P.P.M ≤ 3P.P.M
Lead salts ≤ 10P.P.M ≤ 10P.P.M ≤ 0.001%
Heavy metals ≤ 20P.P.M ≤ 20P.P.M ≤ 0.002%
Sulfate – ≤ 0.05% ≤ 0.05%
Restore matter ≤ 0.5% ≤ 0.5% ≤ 0.5%
3 Synthesis
Industry generally substance containing glucose ( e.g., grain ) as raw materials, the first method by fermentation of glucose to obtain gluconic acid and then neutralized by the sodium hydroxide , sodium gluconate can be obtained , electrolysis and oxidation may also be synthesis. Our most used chemical oxidation – hypobromite oxidation to produce synthetic .
The enzyme according to the different types of fermentation , fermentation can be divided into two clocks, one kind of enzyme is Aspergillus Niger , another acid , the glucose dehydrogenase is formed by means of a law of a lactone , and the decomposition of the ester .
Sodium gluconate may be obtained directly from the fermentation of glucose . In this case , the composition of the fermentation substrate can be held as follows: glucose 250 ~ 350g / L, magnesium sulfate heptahydrate 0.2 ~ 0.3g / L, urea, diammonium phosphate , or 0.4 ~ 0.5g / L. This matrix must be sterilized . The fermentation process, the temperature is controlled to 30-32 ° , pH ~ 50% with 30% sodium hydroxide solution is controlled to 5.5 to 6.5 , the fermentation process lasts 40 ~ 100h. Then , filtration and washing by removing microorganisms , active carbon , filtered , concentrated or spray dried to obtain the finished result .
4 , security
Sodium gluconate nontoxic. Sodium gluconate and chelates with metal ions present in the water formed , through ordinary biological treatment rapidly and completely degraded. Released during the degradation of the heavy metal ions can be removed by precipitation or adsorption on the wastewater treatment sludge which is formed during the removal .