Preparation method of food additive sulfuric acid
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Question: What are the methods for preparing food-grade sulfuric acid as a food additive in the industry? Is it produced directly from sulfur as the raw material, or is industrial sulfuric acid first manufactured and then refined to obtain food-grade sulfuric acid?
It can be prepared directly using sulfur, but it requires that the raw materials, the equipment used for preparation, and production controls do not affect the quality of the product
Thank you! I read online that food additive sulfuric acid is generally produced from sulfur; can it be obtained through the distillation of industrial sulfuric acid?
Distillation works too, but the cost is just too high
The quality of the raw materials is good, with low levels of arsenic and heavy metal impurities. Moreover, no equipment that could introduce arsenic or heavy metal impurities is used in the production setup (especially in the dry absorption stage), and proper production control ensures that sulfur can be used as a raw material to directly produce the food additive sulfuric acid.
The heavy metal impurities present in the raw materials have a significant impact on the production of the food additive sulfuric acid; therefore, the flue gas purification process needs to be designed based on the characteristics of the raw materials