What substances can quickly dissolve coal tar?
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Hello everyone: In ammonia synthesis systems, the butterfly valves at the inlet and outlet of the Roots blower can accumulate coal tar from semi-water gas, which causes problems with the operation of these outlet butterfly valves. In some cases, even newly installed butterfly valves become almost unable to be operated after less than a year of use, forcing them to be replaced again during major maintenance. This not only increases the difficulty for operators in making adjustments during normal operation (starting and stopping), but it also raises maintenance costs; as is well known, butterfly valves are relatively expensive. Now I want to recycle those butterfly valves that are no longer usable. These butterfly valves are primarily affected by coal tar. I wonder if any of you here know of substances that can dissolve coal tar, preferably ones that do not cause damage to the butterfly valves. Thank you so much!
Coal tar is soluble in benzene, ethanol, ether, chloroform, propane, etc.; among these, ethanol is likely to be a good choice as it causes little damage to metals
Thank you so much! I would also like to ask: Does diesel dissolve coal tar?
No. Coal tar is a mixture primarily composed of non-polar substances (mainly hydrocarbons and their derivatives); its composition is quite complex, and it is difficult to dissolve in diesel. Adding alkalis, soap, or laundry detergent can make coal tar soluble in water
The fundamental solution is still to find ways to purify the gas, such as using electrostatic tar removers and water scrubbers!