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Catalytic conversion method using C4 fraction to increase small molecule olefine hydrocarbon yield

A catalytic conversion method, technology of C4 fraction, applied in the field of catalytic conversion

Inactive Publication Date: 2005-07-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the prior art has not yet involved the process of using olefin-rich C4 fraction gaseous hydrocarbons as pre-coke raw materials, using carbon-coated catalysts to perform catalytic conversion with gasoline fractions and / or heavy oil fractions to increase the production of small molecular olefins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example illustrates: using gaseous hydrocarbons rich in C4 fractions as raw materials and using CIP catalysts to conduct a single-pass catalytic conversion test in a small fluidized bed reactor, the gaseous hydrocarbons rich in C4 fractions can not only continue to be cracked to produce small molecular olefins At the same time, it can deposit an appropriate amount of coke on the catalyst.

[0026] The gaseous hydrocarbons rich in C4 fractions as shown in Table 4 enter the fluidized bed reactor, and contact the catalyst under the conditions of different reaction temperatures and catalyst-to-oil ratios for catalytic reaction. The reaction oil and gas and the spent agent are separated in the settler, the reaction products are separated to obtain gas products and liquid products, and the spent agent catalyst is steamed out of the hydrocarbon products adsorbed on the spent agent by steam. After the stripping, the spent agent contacts the heated hot air for regeneration. The...

Embodiment 2

[0032] This example illustrates the case of using gaseous hydrocarbons and gasoline rich in C4 fractions as raw materials and using a CIP catalyst to conduct a catalytic conversion test in a small fluidized bed reactor.

[0033] As shown in Table 5, the gaseous hydrocarbons rich in C4 fractions enter the fluidized bed reactor first, and contact and react with the CIP catalyst at a reaction temperature of 680°C, so that an appropriate amount of coke is generated on the catalyst without the catalyst being removed. The coke is regenerated, and the gasoline fraction shown in Table 2 continues to be contacted and reacted with the catalyst. The reaction product, steam and the spent agent are separated in the settler, and the reaction product is separated to obtain a gas product and a liquid product, and the spent agent catalyst is steamed out of the hydrocarbon product adsorbed on the spent agent by steam. After the stripping, the spent agent contacts the heated hot air for regeneration...

Embodiment 3

[0040] This example illustrates the case of using gaseous hydrocarbons rich in C4 fractions and heavy oil as raw materials and using CIP catalysts to conduct a catalytic conversion test in a small fluidized bed reactor.

[0041] As shown in Table 6, the gaseous hydrocarbons rich in C4 fractions first enter the fluidized bed reactor and contact the CIP catalyst for catalytic reaction, so that different amounts of coke are generated on the catalyst. The generated reaction gas, but continue to pass into the heavy oil fraction shown in Table 3 to continue to contact with the catalyst to react. The reaction oil and gas and the spent agent are separated in the settler, and the reaction products are separated to obtain gas products and liquid products, and the spent agent catalyst is steamed out of the hydrocarbon products adsorbed on the spent agent by steam. After the stripping, the spent agent contacts the heated hot air for regeneration. The test conditions and main test results are ...

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Abstract

A catalytic transforming process for increasing the output of low-molecular olefine by use of C4 fraction includes injecting the gas hydrocarbon rich in C4 fraction in reactor, contacting with catalyst containing high-Si zeolite, reacting at 500-750 deg.C for 0.1-10S, making the carbon deposited catalyst in contact with gasoling fraction and / or heavy oil fraction, reaction at 500-700 deg.C for 0.1-5S, separating the resultant from catalyst, and regenerating the catalyst by stripping.

Description

Technical field [0001] The invention belongs to a catalytic conversion method of petroleum hydrocarbons in the absence of hydrogen, and more specifically, is a catalytic conversion method for increasing the production of small molecular olefins by using C4 fractions. Background technique [0002] Small molecular olefins such as ethylene, propylene and butene are the most basic raw materials for organic synthesis. At present, the production of small molecule olefins in the world mainly adopts steam cracking method, but because the high temperature cracking furnace is easy to coke, the steam cracking unit is only suitable for processing light feedstock oil, such as natural gas, naphtha and light diesel oil, and it also produces by-products. A certain amount of aromatic hydrocarbons. As my country's crude oil is heavier and the yield of light oil such as naphtha is low, the contradiction between the supply and demand of raw materials for steam cracking and catalytic reforming has be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/18C10G35/04
Inventor 高永灿张久顺谢朝钢杨义华
Owner CHINA PETROLEUM & CHEM CORP
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