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Method for improving propone output during catalytic conversion process

A catalytic conversion, propylene technology, applied in the production of bulk chemicals, chemical recovery, organic chemistry, etc., can solve the problem of not involving low-carbon olefin process and other problems, and achieve the effect of reducing fixed investment, small changes, and reducing energy consumption of equipment

Inactive Publication Date: 2009-06-17
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 does not involve the use of C4 components to improve the process of low-carbon olefins in catalytic converters using CN1078094C technology

Method used

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  • Method for improving propone output during catalytic conversion process

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] This example illustrates that the method provided by the invention can be implemented under different C4 feed ratios. Tests were carried out in a continuous riser reactor using CGP-2 catalyst with C4-rich gaseous hydrocarbons and FCC feedstocks, as shown in Table 1 for C4-rich gaseous hydrocarbons and FCC feedstocks as shown in Table 3 The oil enters the bottom and middle and lower parts of the riser reactor respectively. The outlet temperature of the first reactor is 510°C, the pressure at the top of the reactor is 200 kPa, the weight ratio of water to catalytic cracking feedstock is 0.1:1, and the catalyst to catalytic cracking feedstock oil is Contact with the catalyst under the condition of the weight ratio of 8:1 to carry out the catalytic reaction. The oil gas and catalyst are lifted to the separator together, and the oil gas enters the rear fractionation system from the top of the settler after settling and filtering. The oil and gas enter the fractionation towe...

Embodiment 2

[0042] This example illustrates that the method provided by the invention can be implemented under different C4 feed ratios and process conditions. Tests were carried out in a continuous riser reactor using CGP-2 catalyst with C4-rich gaseous hydrocarbons and FCC feedstocks, as shown in Table 1 for C4-rich gaseous hydrocarbons and FCC feedstocks as shown in Table 3 The oil enters the bottom and middle and lower parts of the riser reactor. The outlet temperature of the first reactor is 510°C, the pressure at the top of the reactor is 200 kPa, the weight ratio of water to catalytic cracking feedstock oil is 0.1:1, and the catalyst to catalytic cracking feedstock Contact with the catalyst under the condition of the weight ratio of 8:1 to carry out the catalytic reaction. The oil gas and catalyst are lifted to the separator together, and the oil gas enters the rear fractionation system from the top of the settler after settling and filtering. The oil and gas enter the fractionati...

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Abstract

The invention relates to a method for improving the yield of propylene during catalytic conversion, which comprises: preheated raw oil enters a reactor which comprises two reaction zones; gaseous hydrocarbon which is rich in C4 fractions is injected into the bottom of a first reaction zone or / and the bottom of a second reaction zone, and contacts a hot cracking catalyst and reacts with the hot cracking catalyst in the presence of water vapor; reaction products and a spent catalyst are separated; the reaction products are further separated by a fractionating system into gaseous products which are rich in the propylene and the C4 fractions and liquid products such as gasoline, diesel fuel and so on; and the spent catalyst is subjected to steam stripping, enters a regenerator, and is burnt and recycled. The method can treat hydrocarbon fractions which are rich in the C4 and processed and produced by different technical skills, and produce miacromolecular olefin and particularly the propylene on the premise of not influencing the prior product distribution of catalytic conversion technology.

Description

technical field [0001] The present invention belongs to the catalytic conversion method of petroleum hydrocarbons in the absence of hydrogen, more specifically, it is a catalytic conversion method of propylene production. Background technique [0002] Small molecule olefins such as ethylene, propylene and butene are the most basic raw materials for organic synthesis. At present, the production of small molecular olefins in the world mainly adopts steam cracking method, but the cost of steam cracking equipment is very high, and it is not easy to build; in addition, because the high temperature cracking furnace is easy to coke, so the steam cracking equipment can only use natural gas, naphtha and light Diesel etc. are used as raw materials, and a certain amount of aromatic hydrocarbons are produced by-product. Due to the relatively heavy crude oil in my country and the low yield of naphtha and other light oils, the contradiction between supply and demand of raw materials for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/06
CPCY02P20/52Y02P20/584
Inventor 刘宪龙许友好马建国崔守业
Owner CHINA PETROLEUM & CHEM CORP
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