From naphtha to PX
Thread Content
Experts, I have a question: from naphtha to the final product PX, how many tons of naphtha are required to produce one ton of PX? Of course, some other substances are produced during the PX production process.
This post was last edited by qugd on 2018-5-28 16:04. There is no definite answer to such questions. The composition of naphtha itself is not fixed; if the aromatic potential is high, more mixed aromatics will be obtained through reforming, but the amount of PX produced directly may not be high ； If toluene is subjected to disproportionation, more xylene can be obtained; this xylene can then be isomerized to produce some PX, and the conversion rates in these processes are not fixed. If it is low-naphtha aromatic hydrocarbon, less mixed aromatic hydrocarbon is obtained, and accordingly, the amount of PX resulting from processes such as extraction, fractionation, disproportionation, and isomerization also decreases. If the conditions of the reprocessing process, catalyst activity, and the efficiency of aromatic extraction and sharing differ, the amount of PX obtained in the end will also vary. Do you think there could be a fixed conversion rate in such cases? Please provide the composition of the naphtha and also detail your processing process. I can have someone give you an approximate estimate of the PX yield, but there will be a fee for that service. So asking such a question without clear constraints is extremely unprofessional.
The overall conversion rate is what matters; the original poster probably isn’t asking for an exact figure. Affected by factors such as the raw materials, the yield will certainly also be influenced
The manufacturing processes are different, and there is also a significant gap overall.
This mainly depends on the aromatic potential of the raw materials