According to the data of the Ningbo Agricultural Machinery Department, the city currently has a total of more than 260 grain dryers, with an annual drying capacity of 40 million tons, and the daily amount of drying grain in these days is around 2,000 tons. According to reports, the drying centers all over the country have been operating at full capacity in the recent past. Fenghua and other places also set up a drying service team to go to Yuelin, Xiwu, Jiangkou and other major grain-producing areas for research, and at any time to contact Fenghua's drying centers and drying points for reasonable dispatch.
Chromium(III) sulfate usually refers to the inorganic compounds with the formula Cr2(SO4)3.x(H2O), where x can range from 0 to 18. Additionally, ill-defined but commercially important "basic chromium sulfates" are known. These salts are usually either violet or green solids that are soluble in water. It is commonly used in tanning leather.
Since 33% of the anion charges are due to hydroxy ions the basicity is 33% (but in tanning jargon it is known as 33% reduced). Products with higher basicities, e.g. 42% or 50% may be obtained by the addition of sodium carbonate, these are often used in combination with Sodium Formate. The sodium sulfate is often left in the technical product since it is inert with respect to the tanning process. It is important to fully reduce the hexavalent chromium to trivalent since the hexavalent is more likely to cause health problems for tanners and leather consumers.
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