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Method for producing low-carbon olefins

A low-carbon olefin and metal technology, which is applied in the production of bulk chemicals, hydrocarbon oil treatment, hydrocarbon cracking and hydrocarbon production, etc., to achieve the effects of reducing viscosity, large-scale industrial promotion value, and avoiding complicated processes

Active Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalytic cracking (catalytic cracking) technology is another major source of propylene. Among them, there are many solutions specifically aimed at increasing the yield of propylene, but the yield of propylene is generally only about 20%. At the same time, there are constraints on raw materials. Propylene technologies are all at the expense of producing less gasoline, which may be contradictory to increasing gasoline production

Method used

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  • Method for producing low-carbon olefins
  • Method for producing low-carbon olefins
  • Method for producing low-carbon olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Using waste lubricating oil provided by a refinery as raw material, the raw material oil is passed through a vacuum distillation device to obtain light and heavy distillate oils. Among them, the distillation temperature of 90% of the light distillate oil is controlled at 450°C. The total metal or IIB metal content is 0ppm, and the VIIIB metal total content is 5ppm. The light distillate oil in the light fraction is preheated to 320°C by a heating furnace, enters the riser reactor for reaction, contacts with the high-temperature catalyst of the regenerator, and then vaporizes The reaction is carried out under the following conditions: the reaction temperature is 560°C, the weight ratio of the catalyst to the pretreated material (hereinafter referred to as the agent-oil ratio) is 10:1, and the weight ratio of water vapor to the pretreated material (hereinafter referred to as the water-oil ratio) ) is 0.1:1, and the pressure is 200kPa. The generated oil and gas are separated...

Embodiment 1-1

[0045] The same raw materials and devices as in Example 1 are used, except that the oil gas generated by coking does not enter the riser reactor, but enters the fractionation device, separates gas, gasoline, diesel oil and wax oil, and exits the device. The product distribution is shown in Table 3.

Embodiment 1-2

[0047] The same raw materials and devices as in Example 1 are used, except that the coker oil gas is first separated from the gas phase by a fractionation tower, and the liquid is returned to the riser reactor to continue the reaction. The product distribution is shown in Table 3.

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Abstract

The invention discloses a method for producing low-carbon olefins, which comprises the following steps: (1) pretreating waste lubricating oil and / or illegal cooking oil to ensure that the total metal content in the treated material is not higher than 300ppm; and (2) enabling the material treated in the step (1) to enter a riser reactor to be in contact with a catalyst for reaction, performing gas-solid separation on the generated oil gas and a carbon-containing catalyst, and performing steam stripping and regeneration on the separated catalyst for recycling; and enabling the separated reaction oil gas to enter a fractionation system to be separated to obtain the low-carbon olefin. According to the method, the waste lubricating oil and / or the illegal cooking oil can be efficiently used for increasing the yield of the low-carbon olefin.

Description

technical field [0001] The invention relates to a method for producing low-carbon olefins, in particular to a method for producing low-carbon olefins by using waste lubricating oil and / or gutter oil as raw materials, especially a method for increasing the production of propylene. Background technique [0002] Waste lubricating oil mainly refers to the gradual aging and deterioration of lubricating oil due to high temperature and air oxidation during use, plus the metal powder rubbed off from the friction parts, respiration and other reasons entering the oil, water from the environment The intrusion of impurities and so on changes its physical and chemical properties. Waste lubricating oil can be used to produce other products, such as cracking to produce light diesel and gasoline, as well as lubricating base oil. [0003] CN 105505550 B discloses a method for regeneration treatment of waste lubricating oil, which includes the steps of solvent treatment, membrane separation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C07C4/06C07C11/06
CPCC10G55/06C07C4/06C10G2300/1007C10G2300/4006C10G2300/4012C10G2400/20C07C11/06Y02P20/52Y02P20/584
Inventor 武云关明华初人庆郭丹宋永一刘继华勾连忠
Owner CHINA PETROLEUM & CHEM CORP