Concentration treatment of spent sulfuric acid
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The treatment of waste sulfuric acid generated during the esterification process is a rather troublesome issue. In this process, sulfuric acid acts as a catalyst; after dehydration, concentrated sulfuric acid turns into dilute sulfuric acid. The common approach is to add an alkaline solution to neutralize it before discharging it, which results in significant waste and pollution. Are there any experts who can concentrate this type of rare and waste sulfuric acid and enable its recycling? The basic characteristics of the spent sulfuric acid are as follows: it contains 10% by weight of sulfuric acid, about 1% by weight of esters, and the remainder is water. Looking forward to help from the experts at Haichuan
Consider external utilization, such as neutralizing alkaline waste generated by local enterprises
Generally, evaporation is used to concentrate the solution – first raising its concentration to around 85%, and then sending it to a sulfuric acid plant to increase it to 98.3%. This allows for reuse, but it is necessary to remove impurities from it, or a dedicated adsorption system must be installed Operate in series or parallel with the main unit!
If there are impurities that are difficult to remove, the only option is to neutralize them with an alkali
I’m not sure whether it’s possible to reuse waste sulfuric acid by concentrating it through evaporation to 95% concentration; by the way, what exactly are the esters in sulfuric acid? If possible, I can prepare a detailed plan for you. We have carried out many such sulfuric acid treatment projects; zhjnavy015@163.com
What organization do you work for? Could you please tell me? We might be able to talk if there’s a chance
A ceramic membrane can be used first to remove esters, followed by multi-effect concentration
The key is cost – isn’t waste acid treatment across the country a matter of cost? I guessed it
What purity level can general purification methods achieve?
There is no viable and effective solution anywhere in the country. Stop discussing it. . I have a suggestion for you. It’s fine to simply release it into outer space or on Mars