Process for producing sodium gluconate
阅读：950发布：2022-08-06
专利汇可以提供Process for producing sodium gluconate专利检索，专利查询，专利分析的服务。并且The undesirable darkening or discoloration of solid sodium gluconate produced by evaporating water from an aqueous solution thereof is reduced or eliminated by introducing into such a solution a sufficient amount of sodium sulfite to inhibit discoloration of the resultant solid product.，下面是Process for producing sodium gluconate专利的具体信息内容。
2. A process as claimed in claim 1 in which sodium bisulfite is added to said solution and sodium sulfite is formed therefrom in situ.
3. A process as claimed in claim 1 in which said aqueous solution of sodium gluconate comprises a fermentation liquor containing gluconic acid and sodium gluconate having an acidic pH, sodium bisulfite is added to said liquor while the pH is acidic, and said liquor is thereafter neutralized with caustic soda and evaporated.
4. A process as claimed in claim 1 in which said evaporation is effected on an atmospheric rotary drum drier.
5. A process as claimed claim 3 in which an additional quantity of sodium bisulfite is added to said liquor after said liquor has been at least partially neutralized.
6. A process as claimed in claim 1 in which the quantity of sulfite, expressed as sodium bisulfite, is within the range of 0.3 to 0.6 percent by weight of sodium gluconate.
7. Solid sodium gluconate inhibited against discoloration by incorporation therewith of an effective inhibiting quantity of sodium sulfite.
8. A product as claimed in claim 7 in which the quantity of sulfite is within the range of 0.3 to 0.6 percent, expressed as sodium bisulfite, of the weight of sodium gluconate.
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