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Catalytic conversion method for producing propylene and fuel oil

A catalytic conversion method and catalytic conversion technology, which are applied in the field of catalytic conversion for the production of propylene and fuel oil, can solve the problems of high dry gas yield and low octane number of propylene fuel oil, etc., so as to reduce the dry gas yield and improve gasoline Effect of octane number and productivity improvement

Active Publication Date: 2016-02-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome that the production method of existing propylene and fuel oil mainly focuses on heavy oil catalytic cracking technology, and dry gas yield is higher, and the octane number of propylene yield and fuel oil (mainly gasoline) Relatively low defects, providing a method for catalytic conversion of light hydrocarbon oil feedstock to produce propylene and fuel oil

Method used

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  • Catalytic conversion method for producing propylene and fuel oil

Examples

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Embodiment approach

[0047] The catalytic conversion method provided by the present invention can be carried out in a conventional reactor in the art, for example, the reactor can be selected from a riser reactor, a fluidized bed reactor of equal linear velocity, and a fluidized bed of equal diameter Reactor, ascending conveying line, descending conveying line, or a combination of two or more, the combination includes series connection and / or parallel connection. According to a preferred embodiment of the present invention, the catalytic conversion method is implemented in a riser reactor, that is, the reactor described in the present invention is preferably a riser reactor.

[0048] When the reactor is a riser reactor, the riser reactor has a first reaction zone and a second reaction zone. Preferably, in the riser reactor, the height ratio of the first reaction zone to the second reaction zone is 0.1-1:1, more preferably 0.2-0.8:1. Further preferably, the riser reactor is a variable-diameter ris...

preparation example

[0078] The preparation method of the catalytic conversion catalyst used in the embodiment and comparative example is as follows:

[0079] (1) 20gNH 4 Cl was dissolved in 1000g of water, and 100g (dry basis) of crystallization product ZRP-1 zeolite (Si / Al (molar ratio)=30, rare earth content RE 2 o 3 =2.0% by weight), after exchanging at 90°C for 0.5h, filter to obtain a filter cake; add 4.0gH 3 PO 4 (Concentration is 85% by weight) and 4.5gFe(NO 3 ) 3 Dissolved in 90g of water, mixed with filter cake, impregnated and dried; then roasted at 550°C for 2 hours to obtain phosphorus and iron-containing MFI structure mesoporous zeolite, elemental analysis chemical composition is 0.1Na 2 O·5.1Al 2 o 3 2.4P 2 o 5 1.5Fe 2 o 3 3.8RE 2 o 3 88.1 SiO2 2 .

[0080] (2) 75.4kg halloysite (solid content 71.6% by weight) is beaten with 250kg decationized water, then add 54.8kg pseudoboehmite (solid content 63% by weight), adjust its pH to 3 with hydrochloric acid, and stir Even...

Embodiment 1

[0083] This example is used to illustrate the catalytic conversion method for producing propylene and fuel oil according to the present invention.

[0084] according to figure 1 The flow shown is tested, and the test is carried out on a medium-sized device of a variable-diameter riser reactor. The feedstock is straight-run naphtha, and the preheated feedstock oil (350°C) is mixed with carbon dioxide and then enters the variable-diameter riser reactor. The bottom of the straight section (ie the first reaction zone) (CO 2 The mass ratio to raw oil is 0.5:100), at a reaction temperature of 575°C, a reaction time of 1.5 seconds, a reaction pressure of 2.17MPa, a weight ratio of catalytic conversion catalyst to raw oil of 30, and the weight of water vapor and raw oil The reaction is carried out under the condition of a ratio of 0.25:1, and the reaction oil gas and water vapor and the unborn catalyst enter the diameter-expanding section of the variable-diameter riser reactor from t...

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Abstract

The invention relates to a catalytic conversion method for producing propylene and fuel oil. The method comprises the following steps: carrying out a catalytic conversion reaction on preheated a light hydrocarbon oil raw material and carbon dioxide in the first reaction zone of a reactor in the presence of a catalytic conversion catalyst, injecting a reaction material in the first reaction zone of the reactor to the second reaction zone of the reactor, and carrying out a catalytic conversion reaction on the injected reaction material and injected carbon dioxide. High propylene yield and high yield of gasoline with high octane number can be obtained through the catalytic conversion method for producing propylene and fuel oil.

Description

technical field [0001] The invention relates to a catalytic conversion method for producing propylene and fuel oil, more specifically, to a method for producing propylene and fuel oil by catalytic conversion of light hydrocarbon oil feedstock. Background technique [0002] Propylene is an important organic chemical raw material. According to analysis, the global demand for propylene increased by about 4.0% in 2012, about 83Mt, and the supply-demand ratio of propylene was about 1.0. In the past 10 years, the growth rate of world propylene demand has been higher than that of ethylene. It is estimated that in the next 20 years, the growth rate of world propylene demand will still exceed the growth rate of ethylene demand. At present, 61% of the world's propylene comes from the by-products of steam cracking to produce ethylene, and 34% comes from the by-products of gasoline and diesel produced by catalytic cracking units in refineries. Among them, steam cracking uses naphtha and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/00C10G11/05C10G11/18C07C4/06C07C11/06
CPCY02P20/141Y02P20/52Y02P20/582
Inventor 张久顺毛安国魏晓丽袁起民
Owner CHINA PETROLEUM & CHEM CORP
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