Industrial application of domestic HYT-6319 and HC-185 LT/HC-53 LT hydrogenation catalysts
In the 3.70 Mt/a hydrocracking unit of Guangdong Petrochemical Company of PetroChina,a mixture of medium quality vacuum wax oil and heavy aromatics(with the mass ratio of 97∶3)was used as raw oil.The hydrofining catalyst HYT-6319 and hydrocracking catalyst HC-185 LT/HC-53 LT produced domestically by Fushun Petrochemical Company of PetroChina and authorized by UOP Company were used for industrial application.The catalysts operation,product properties and distribu-tion were investigated.The results showed that dur-ing the operation of the catalysts,the average tem-perature at the inlet of each bed layer in the first re-fining,first cracking,and second cracking reactors was lower than the design value by 23.5-38.7,22.8-25.0,34.3-44.9℃,respectively.The average tem-perature rise of the bed layer in the first refining re-actor was lower than the design value by 10.1℃,and the average temperature rise of the bed layer in the first cracking and second cracking reactors was higher than the design value by 3.4,3.6℃,respec-tively.Both diesel and aviation kerosene products met the nationalⅥstandard,and the sulfur(nitro-gen)content of heavy naphtha was less than 0.5 μg/g and being a high-quality raw material for reform-ing units.The sulfur content of light naphtha was 2.8 μg/g and being a high-quality ethylene crack-ing raw material.The yield of the main products in-cluding heavy naphtha,aviation kerosene,light naphtha,and diesel was 48.62%,25.28%,5.47%,and 14.14%,respectively.The total yield of prod-uct was 93.51%.It was higher than the design value by 0.04 percentage points.
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