Hydrotreatment method of deep vacuum distillation wax oil

Abstract

The invention relates to a hydrotreatment method of deep vacuum distillation wax oil. The mixture of raw oil and hydrogen passes through two hydrogenation reaction zones in sequence, wherein a hydrogenation protective agent and a hydrogenation demetalization deasphaltenizing agent are filled in the first hydrogenation reaction zone, and a hydrogenation desulfurizing agent and a hydrogenation denitrification desulfurizing agent are filled in the second hydrogenation reaction zone. Reaction products are cooled and separated to obtain refined heavy fraction oil, and the refined heavy fraction oil is a high quality raw material for catalytic cracking. In the invention, the raw oil has strong adaptability and can be used for processing deep vacuum distillation wax oil with high sulphur content, high nitrogen content, high metal and high asphaltene content and mixed oil thereof, and moreover, the device has long running period.

Description

technical field

[0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for hydrogenation treatment of vacuum deep waxing oil and its mixed oil. Background technique

[0002] At present, the price of crude oil is getting higher and higher, and the proportion of crude oil procurement cost in the total refining cost has risen sharply, which has greatly reduced the profit margin of the refinery. On the other hand, the trend of crude oil resources becoming inferior and heavy in the world is obvious. The API ratio of imported crude oil in the United States has decreased by more than 4 units since the early 1980s. The situation in China is similar to this. In this context, how to use limited resources to maximize the production of target oil products (mainly light oil and middle distillates) and reduce by-products such as coke refining technology has become the key to improving the efficiency of refineries. ...