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A method for producing aromatic hydrocarbon solvent oil by hydrogenation of ethylene cracking C9 aromatic fraction

A technology for ethylene cracking and aromatic hydrocarbons, which is applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment products, hydrogenation process, etc. It can solve the problems of multiple equipment, complicated process flow, and high operating cost, so as to ensure the operating cycle and reduce operating costs. , the effect of high operating costs

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is currently the main process for producing aromatic solvent oil from pyrolysis gasoline. Due to the use of the two-stage method and the gas phase circulation hydrogenation process, and in order to reduce the temperature rise of the reaction bed, both stages require a large amount of circulating oil to take away the heat of reaction. Therefore, the process is complicated, the equipment is many, and the operating cost is high.

Method used

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  • A method for producing aromatic hydrocarbon solvent oil by hydrogenation of ethylene cracking C9 aromatic fraction
  • A method for producing aromatic hydrocarbon solvent oil by hydrogenation of ethylene cracking C9 aromatic fraction
  • A method for producing aromatic hydrocarbon solvent oil by hydrogenation of ethylene cracking C9 aromatic fraction

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Embodiment approach

[0030] Such as figure 1 Shown, the ethylene cracking C of the present invention 9 The process flow of distillate liquid phase hydrogenation process is: ethylene cracking C 9 Fraction 1 is mixed with circulating oil 7, and after being fully dissolved with hydrogen 2, it enters the first-stage hydrofinishing reaction zone 3, and contacts with the noble metal hydrofinishing catalyst. Under relatively mild process conditions, selective hydrotreating is easy to coke Diolefins, styrene and their derivatives. Ethylene Cracking for Diene Removal 9 The aromatic fraction is fully dissolved with hydrogen again and enters the second-stage hydrofinishing reaction zone 4, where it reacts with hydrogenation protection catalyst, hydrofinishing catalyst A, hydrofining catalyst B and hydrofining catalyst successively, and saturates monoolefins under suitable conditions , and remove sulfur, nitrogen impurities and colloids, the reaction effluent enters the separator 5 for gas-liquid separatio...

Embodiment 1

[0041] Prepare solid sodium aluminate to a concentration of 200gAl 2 o 3 / L concentrated sodium aluminate solution, diluted to a concentration of 40gAl 2 o 3 / L sodium aluminate working solution 20L (a), take and dilute to a concentration of 50gTiO 2 / L titanium sulfate working solution 2L (b). Take a 30L steel plastic tank, open the container valves of (a) and (b) at the same time, and ventilate and introduce CO with a concentration of 40v% at the same time 2 Gas, set the flow rate of (a) and (b) so that the reaction time is 50 minutes, and quickly adjust the CO 2 flow rate, keep the pH value of the system at about 10, and the reaction temperature is 35°C. 2 CO 3 The reaction mother liquor, by adjusting Na 2 CO 3 Solution flow, keep the pH value at 9.5, the reaction time is 0.5 hours, stop feeding CO 2 , and then the air was stabilized for 40 minutes, and the slurry was filtered and washed with 60°C deionized water until neutral. Microwave drying at 120°C for 20 min...

Embodiment 2

[0043] Use 1000g of aluminum hydroxide powder, add 20mL of nitric acid, 700mL of deionized water, 450g of silica sol and additives, mix and roll, extrude into a clover shape, dry at 110°C for 3 hours, and roast at 550°C for 3 hours to obtain the carrier; Mix 21g of nickel, 75g of molybdenum oxide, 7g of cobalt carbonate, 20g of phosphoric acid and 130mL of deionized water, and dissolve at 95°C for 3 hours to obtain 200mL of Mo-Ni-Co-P co-immersion solution. Impregnated at room temperature, dried at 120°C for 3 hours, and calcined at 500°C for 3 hours to obtain Hydrofining Catalyst A. The physical properties of hydrofining catalyst A are shown in Table 2.

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Abstract

The invention discloses an ethylene cracking C 9 The invention relates to a method for producing aromatic hydrocarbon solvent oil through liquid-phase circulating hydrogenation of aromatic fractions. Ethylene cracking C 9 After the distillate is mixed with circulating oil, fully dissolved with hydrogen, it enters the first hydrofinishing reaction zone, and reacts with precious metal hydrofinishing catalyst; ethylene cracking C for removal of dienes 9 The aromatic fraction is fully dissolved with hydrogen again and then enters the second hydrofinishing reaction zone, where it reacts with hydrogenation protection catalyst, hydrofinishing catalyst A, hydrofinishing catalyst B and hydrofining catalyst in turn, and the hydrofinishing product is separated to obtain high aromatics Solvent oil. The inventive method has realized ethylene cracking C 9 Highly efficient use of aromatic fractions can yield high-quality, stable high-aromatic solvent oils. The invention has the characteristics of low energy consumption and long stable operation period of the device.

Description

technical field [0001] The present invention relates to a C 9 A method for producing aromatic hydrocarbon solvent oil by hydrogenation of aromatic fractions, specifically a method of cracking C with ethylene 9 The aromatic hydrocarbon distillate is used as a raw material, and the aromatic hydrocarbon solvent oil is produced by a liquid-phase circulating hydrogenation process. Background technique [0002] Ethylene cracking C 9 The aromatic fraction is separated from ethylene cracking naphtha by extraction and C 5 Fraction, C 6 ~C 8 The remaining fraction after fractionation accounts for about 10% to 15% of the total ethylene production. With the rapid development of my country's petrochemical industry, especially the improvement of ethylene production capacity, ethylene cracking C 9 The number is also increasing and will exceed 10×10 in 2010 6 t / a. At present, most ethylene plants in my country use light diesel oil and naphtha as raw materials. 9 The yield is calcul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/4006C10G2300/4012C10G2300/70C10G2400/18C10G2400/30
Inventor 赵威全辉姚春雷张志银孙国权刘林东
Owner CHINA PETROLEUM & CHEM CORP
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