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Catalytic conversion method for selective preparation of micromolecular olefin

A catalytic conversion method and small molecule technology, which are applied in the field of catalytic conversion for selectively producing small molecular olefins, can solve the problems of low catalyst coking rate, difficulty in maintaining the thermal balance of the reaction system, low acid density, etc., and achieve good hydrothermal stability. and the effect of mechanical strength

Active Publication Date: 2006-01-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the raw materials used are light raw materials, the zeolite contained in the catalyst is a high-silica zeolite, and its acid density is low, so the coking rate on the catalyst is low, which makes it difficult to maintain the heat balance of the reaction system itself in the production process of the above-mentioned technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] The preparation of catalyst used in the embodiment: in 175 kilograms of aluminum sols (Shandong Zhoucun Catalyst Factory product, Al 2 o 3 11.4%, pH: 2-3), add 50 kg of kaolin (industrial product of Suzhou China Clay Company, solid content 80%), 15 kg of rectorite slurry (solid content is 35%) and stir for 90 minutes, then add 117 kg of Fe- ZRP (1) zeolite slurry (solid content is 30%) and 143 kg of decationized water, homogeneous, spray-dried, the obtained sample was washed until the pH value was close to 6, dried, and roasted at 500 ° C for 3 hours to obtain catalyst sample A1 -5. According to the content of each component shown in Table 4, adjust the dosage range of rectorite slurry and kaolin, and according to the above-mentioned method preparation number is respectively A1-10, A1-20, A2, A3, B, C, D, E catalyst.

[0045] The preparation of contrast agent: in 175 kilograms of aluminum sols (Shandong Zhoucun Catalyst Factory product, Al 2 o 3 11.4%, pH: 2-3), a...

Embodiment 1-9

[0047] Embodiment 1-9 illustrates: the implementation effect of the method provided by the present invention.

[0048] Experiments were carried out using a small fixed fluidized bed unit. Before the test, the catalyst samples listed in Table 4 were aged for 14 hours at 790°C and 100% water vapor, and the catalyst samples A1-5, A1-10, A1-20, A2, A3, B, and C were respectively used , D, E to test. The main reaction conditions are as follows: reaction temperature 620°C, agent-to-oil ratio 15, weight space velocity 6 hours -1 , 20% water injection. The composition of the raw materials used is shown in Table 5. The test results are listed in Table 6. The test procedure is as follows: the raw materials shown in Table 5 are injected into a small fixed fluidized bed reactor, and in the presence of water vapor, they are contacted and reacted with a hot catalyst sample; the reaction products are separated to obtain various products. The raw catalyst is burnt and regenerated after b...

Embodiment 10-11

[0058] This embodiment illustrates: when adopting different petroleum hydrocarbon raw materials, the implementation effect of the present invention.

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Abstract

The selectively small molecular weight olefin preparing process includes contacting hydrocarbon oil material with rich C4-C8 olefin with catalyst inside the catalytic cracking reactor and reaction at the conditions of temperature 550-700 deg.c, pressure 0.01-0.2 MPa, weight hourly space velocity 1-20 / hr and catalyst / oil ratio 5-30. The catalyst consists of clay 10-70 wt%, inorganic oxide 5-75 wt%, and zeolite 10-70 wt%, the zeolite is high silicon zeolite in five-element cyclic structure containing P and RE and modified with one or several of Fe, Zn, Mg and Ag, and the clay contains rectorite in 10-50 wt%.

Description

technical field [0001] The invention belongs to a catalytic conversion method of petroleum hydrocarbons in the absence of hydrogen, more specifically, a catalytic conversion method for selectively preparing small molecule olefins. Background technique [0002] At present, the small molecular olefins needed in the chemical process, such as ethylene and propylene, mainly come from the steam cracking unit, and the rest come from the by-products of the refining process, such as the catalytic cracking process. In addition, small molecular olefins can also be produced by contacting hydrocarbons, especially olefins, with zeolite-containing catalysts for cracking reactions. For example, CN1414068A discloses a ZSM-5 zeolite catalyst with a silicon-aluminum ratio of 20-70 for preparing ethylene and propylene from low-value-added olefins. The zeolite contained in the catalyst is modified by at least two substances selected from group IIA metals, rare earth metal elements and phosphoru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/02C07C11/02
Inventor 朱根权张久顺谢朝钢汪燮卿吴治国
Owner CHINA PETROLEUM & CHEM CORP
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