In the extraction of phenol from tar, carbon dioxide is used as the acid source to decompose sodium phenoxide in order to produce crude phenol
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Who knows about the technologies related to the production of crude phenol by decomposing sodium phenate using carbon dioxide as an acid source in the extraction of phenols from tar, as well as the manufacturers (both domestic and foreign) and the current status of these technologies?
Reply to 1# mqy0502: You are referring to the decomposition of carbon dioxide, but after three rounds of decomposition, it is still not the final crude phenol, as the pH value can only be adjusted using sulfuric acid.
Reply to 1# mqy0502: Our company uses this technology; it is quite mature and environmentally friendly. The process is also very simple!
Reply to 3# 1337562586: Hello, which company do you work for? Could you leave your contact information?
Using carbon dioxide for decomposition doesn’t seem to yield very good results, but it is a trend. PH also needs to be adjusted with some acid
Look at the source of your carbon dioxide and its concentration; if the concentration is low, the decomposition effect will be poor, but ultimately some of the phenoxide salts still need to be decomposed using sulfuric acid
Reply to 4# mqy0502: If you need it, add me on QQ at /1337562586
Reply to 5# bxy268: Generally, the waste gas from the tar recovery tubular furnace is used for decomposition; the crude phenol contains about 83% phenol!
Reply to 8# 1337562586: What is the fuel used in your tubular furnaces? Is it forced air supply or natural air intake? What is the carbon dioxide concentration in combustion exhaust gases?
Reply to 9#: I don’t understand. We use gas, and sometimes natural gas as well; the air supply is provided by forced ventilation using recycled exhaust gas.
Using carbon dioxide can save sulfuric acid and reduce the generation of sodium sulfate wastewater