Alkylation process as a replacement for copper washing
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After the installation of a new 30kt/a diol production unit along with high-pressure alkylation to replace the existing copper washing process and generate methanol as a by-product, what are the potential energy-saving benefits in terms of ammonia, steam, electrolytic copper, acetic acid, electricity, etc.? How can these be calculated? Thank you! (How much steam is consumed per ton of ammonia-copper washing?)
How many fertilizer plants are still using copper washing nowadays? I learned about copper washes back in school; it’s been many years, and the fact that they are still in use today shows that this craft possesses great resilience.
The copper washing gas purification method is a technique commonly used by small nitrogen fertilizer manufacturers to remove CO, CO2, and H2S from gases. However, it presents problems such as gas loss as well as the loss of acetic acid, copper, and ammonia, which severely affects the efficiency of raw material utilization and causes environmental pollution. By adopting a new alcoholization process in place of the copper washing process, it is possible to completely eliminate the pollution caused by acetic acid, copper, and ammonia to the atmosphere and water bodies； It is also possible to produce methanol as a by-product during the purification of CO and CO2, thereby improving the economic efficiency of the enterprise ； More importantly, improving the purity of the gas is beneficial for the long-term stable production of ammonia synthesis. Therefore, the new alcohol hydrocarbonation purification process can achieve the goal of comprehensively improving the environment and reducing production costs. In alcohol alkylation purification, the same pressure is generally used for both alkylation and alkylation, but there are medium-pressure and high-pressure methods. The medium-pressure method uses a pressure level of 12.5 MPa; its advantage is that it shares the same purification pressure as that used for raw copper, resulting in a lower pressure level ； The disadvantage is the low purity of the purified gas; moreover, the purified gas still needs to be compressed further by the compressor to reach the pressure required for ammonia synthesis, which causes the purified gas to be contaminated by compression lubricant and is harmful to the ammonia synthesis catalyst. The high-pressure method uses a pressure level of 31.4 MPa; its drawback is the high pressure level ； The advantages are that it operates at the same pressure as ammonia synthesis, achieves high gas purification, and extends the service life of the ammonia synthesis catalyst.
If it’s not just theoretical speculation but actual calculations, thank you! Consumption comparison, economic benefits