Discussion on the recycling of waste hydrochloric acid
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A landmark enterprise in Hebei Province, it produces waste hydrochloric acid as a by-product of chloroacetic acid production; the annual output is around 80,000 tons, with a concentration of 31-35%. The composition includes 31-35% hydrochloric acid, 1-2% sulfuric acid, less than 1% acetic acid, and it may also contain small amounts of acyl chlorides and sulfur dioxide. Goal: Chlorine, or refined chemicals with low input and high added value. Contact person: Mr. Hu, 18990147211. Feel free to call for inquiries, as well as to get information on technology, equipment, cooperation opportunities, and various ideas.
There is a type of plasma reactor that enables the one-step conversion of HCl and air into chlorine gas, but it is still in the experimental stage； The Woodafa electrolysis process has high energy consumption, and little is known about its use in catalytic chlorine production.
HCl reacts with air to produce chlorine gas; dry gas is required for this reaction, and dilute hydrochloric acid is also generated. It is estimated that the chlorine gas produced will contain a high level of impurities, which would require additional processing costs later on
How should 30% hydrochloric acid be stored?
During the catalytic oxidation of hydrogen chloride to produce chlorine (the DEACON process), oxygen and hydrogen combine to form water. Therefore, the hydrogen chloride feed gas does not have to be a dry gas, but it must also be free of free acid. For the by-product hydrochloric acid, deep desorption is first required to obtain hydrogen chloride, which then needs to be pre-treated to remove impurities such as toxins that are harmful to oxidation catalysts. The production cost will also be relatively high; it can only be understood as a combination of \"recycling and environmental protection facilities\". Otherwise, evaluating this part of the facilities separately is not economically attractive.
This post was last edited by Hu Sheng_A09jD on 2019-12-5 at 11:18. What my brother said is right; chlorine is an important raw material for the company, and waste hydrochloric acid is obtained by absorbing HCl emissions with water. If catalytic oxidation is used, the overall cost will decrease considering the entire process.