Methods for concentrating sulfuric acid
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How to convert 75% sulfuric acid into 98% concentrated sulfuric acid? Last edited by txglyl on 2007-12-22 10:48]
Acid with a concentration of 105 can be added, mixed in proportion. It is also possible to absorb SO3 in a sulfuric acid plant.
The method on the 2nd floor is feasible, but it can be rather troublesome in some actual production processes. I am also very interested in information on this topic; if there is a cheaper way to concentrate dilute sulfuric acid, it would solve a key technical issue in the direct conversion of liquid methane into methanol
The vacuum drying process can be considered, using steam for heating, with a removable plate heat exchanger as the heater.
To concentrate sulfuric acid, it is possible to use hot flue gas with a bubbling concentration process (direct heat transfer) or an indirect heat transfer concentration process (such as using steam as the heat medium)； If 75% is used directly as the absorbing acid and then concentrated to 98% (this is theoretically possible but not in practice, as using 75% as an absorbing acid generates a large amount of acid mist).
Secondary concentration followed by purification can yield sulfuric acid with a high purity of 96%, as well as process water containing no more than 0.1% sulfuric acid. If you’re interested, I can prepare a plan for you: zhjnavy015@163.com
A more feasible method is vacuum concentration, which requires tantalum-based equipment for evaporation in order to obtain sulfuric acid at a concentration of 93%-96%. Reaching a concentration of 96% demands some imported equipment, resulting in higher costs compared to concentrating it to 93%. In fact, given the high prices of concentrated sulfuric acid, it would be better for the poster to consider methods of concentration. We are the only company in China specialized in manufacturing equipment for tantalum materials; you can inquire at wmmtlc@gmail.com
There seems to be specialized equipment for this purpose, with manufacturers in this field
It depends on how much volume you have. If the amount is large, you might consider purchasing an acid concentration system imported from abroad, such as the QVF from Germany – the world’s leading supplier of acid concentration systems, capable of achieving a concentration level of 96%. You get what you pay for; the quality and reliability of its concentration systems are unmatched by other imitation products. If you’re interested, feel free to contact me at 13515110032