Utilization of by-product HCl
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How is the by-product HCl generally utilized in production? Specifically, in the 3.5 million-ton heavy oil project involving 100,000 tons per year of PC, 200,000 tons per year of MDI, 130,000 tons per year of acrylonitrile, and DCC, how should the HCl generated during the production process be utilized?
First, it is necessary to determine the purity of HCL; if the purity is high, distilled water can be used directly to produce hydrochloric acid. If there are impurities present, they must be separated first. There are also those that are directly collected to neutralize alkaline wastewater and used as environmental treatment agents: lol
1. Electrolyze to produce hydrogen and chlorine for reuse 2. Convert into hydrochloric acid for sale 3. PVC exactly needs it
Directly dispose of the acid waste; if recycling it, resins seem to be able to remove impurities
Generally, it should be done by using water to absorb and produce hydrochloric acid as a by-product: lol
The by-product HCL solution is used by many manufacturers; it is best to extract the organic impurities from it
It is usually treated as by-product hydrochloric acid and exported for various applications that require by-product hydrochloric acid, such as in the production of polyaluminum chloride, etc.
First, the HCl gas is absorbed in stages; the resulting 30% concentrated hydrochloric acid is then separated into chlorine gas and 19% azeotropic acid. 19% of the azeotropic acid goes to the first absorption stage!
The HCL by-product we produce every day is sold to specialized collection manufacturers
After analysis, PVC is produced; this is how Wanhua handles MDI.