Hydrocarbon oil catalytic conversion method of a light hydrocarbon and heavy hydrocarbon composite raw material

Abstract

The invention relates to a catalytic conversion method for hydrocarbon oil containing a light hydrocarbon-heavy hydrocarbon composite raw material. The method of the invention mainly solves the problems of high propylene yield and low gasoline yield in the prior art. The catalytic conversion method provided by the invention comprises the following steps: allowing preheated light hydrocarbons (gasoline fractions) and heavy hydrocarbons to be simultaneously and respectively sprayed out from an integrated spray nozzle into different reaction zones of a lift pipe reactor to contact and react witha catalyst from a regenerator, allowing reaction products and a carbon deposit catalyst to flow out from the lift pipe reactor and to enter a cyclone separation system for separation, allowing the separated catalyst to undergo steam stripping, then enter the regenerator for charring and then return to the bottom of the lift pipe reactor for cyclic use, and allowing the reaction products to undergofractional distillation via fractionating towers so as to obtain corresponding products, wherein the integrated spray nozzle is a spray nozzle capable of simultaneously and respectively spraying thelight hydrocarbons and the heavy hydrocarbons out from different spray heads; and the reaction zones are composed of a light hydrocarbon reaction zone I, a heavy hydrocarbon reaction zone and a lighthydrocarbon reaction zone II successively arranged along the vertical direction of the reactor from bottom to top. The catalytic conversion method provided by the invention has the characteristic of capacity of improving the yield of gasoline and propylene.

Description

technical field [0001] The invention relates to a catalytic conversion method for hydrocarbon raw materials, more specifically, to a catalytic conversion method for increasing the yield of gasoline and propylene in the absence of hydrogen. Background technique [0002] With the rapid development of the global economy, it has become an important development trend of the contemporary oil refining industry to develop oil refining technologies that effectively utilize oil resources, especially heavy and low-quality crude oil resources, and to maximize the acquisition of high-quality clean light oil products and basic chemical raw materials. As the main production process of light oil products in the oil refining industry, catalytic cracking has attracted extensive attention from major research and development institutions at home and abroad because of its wide applicability and relatively low processing cost. [0003] At present, the trend of heavy and inferior raw materials for...

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Problems solved by technology

The patent uses two riser reactors, the embedded riser uses mixed C4, FCC light gasoline, light naphtha, and light diesel oil as raw materials, and the outer embedded riser uses Daqing mixed oil or Daqing vacuum residue as raw materials , the gasoline yield is low, and the process is relatively complicated, making it difficult to implement

[0009] Therefore, how to solve the problem of high propylene yield and low gasoline yield in the prior art has become the focus of attention of researchers and a key problem to be solved

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