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Catalytic conversion method for producing low-carbon olefin from chlorine-containing plastic oil

A technology of catalytic conversion and plastic oil, which is applied in the treatment of hydrocarbon oil and petroleum industry, etc., can solve the problems of high construction cost of hazardous solid waste landfills, high requirements for equipment materials, and complicated process flow, so as to improve the utilization value and greatly Economic and social benefits, the effect of avoiding the decomposition of hydrocarbon molecules

Active Publication Date: 2022-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Landfilling is a simple and convenient method, but with the improvement of oil refining capacity, the amount of waste catalysts is increasing year by year, and waste catalysts usually contain metal elements such as Ni and V. Direct landfilling will inevitably result in waste of metal resources and pollution. environment, endangering human health
In the newly released "National Hazardous Waste List" in 2016, the waste catalytic cracking catalyst is classified as HW50 hazardous waste, which must be landfilled in accordance with the disposal requirements of hazardous solid waste, but the construction cost of hazardous solid waste landfill is relatively high
When producing fuel oil as the target product, hydrogenation technology is usually used as the main method to achieve the effect of dechlorination. However, hydrogenation technology has a complicated process due to hydrogen consumption and high requirements on equipment materials, which greatly increases the investment cost.

Method used

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  • Catalytic conversion method for producing low-carbon olefin from chlorine-containing plastic oil
  • Catalytic conversion method for producing low-carbon olefin from chlorine-containing plastic oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] according to figure 1 The process is tested, and the dechlorination test of chlorine-containing plastic oil A is carried out on the medium-sized device of the riser reactor. The raw material oil is chlorine-containing plastic oil A, and the catalyst is the waste catalyst of the industrial catalytic cracking unit. The waste plastic mixture enters the riser for reaction The hot catalyst in the lower part of the reactor contacts and carries out catalytic decomposition reaction, injects dechlorination agent in the middle and downstream of the reactor, the dosage of dechlorination agent is 2000 mg / kg (waste plastic oil), and reacts with the hydrogen chloride generated in the reactor, the reaction product The reaction product and the spent catalyst enter the closed cyclone separator from the outlet of the reactor, and the reaction product and the spent catalyst are quickly separated, and the reaction product is separated into gas and low-chlorine plastic oil according to the d...

Embodiment 2

[0078] according to figure 1 and figure 2 The process was tested, and the catalytic conversion reaction test of waste plastic oil was carried out on the medium-sized device of the riser reactor. The raw material was chlorine-containing plastic oil B, and the catalytic decomposition catalyst was the waste catalyst of industrial catalytic cracking unit. Chlorine-containing plastic oil B entered the riser The hot catalyst in the lower part of the reactor contacts and carries out the catalytic decomposition reaction. Inject the dechlorination agent in the lower part of the reactor. The reaction occurs, and the reaction product and the unused catalyst enter the closed cyclone separator from the outlet of the reactor, and the reaction product and the unused catalyst are quickly separated, and the reaction product is separated into cracked gas and low-chlorine plastic oil in the separation system according to the distillation range. The separated gas is returned to the bottom of th...

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Abstract

The invention relates to a catalytic conversion method for producing low-carbon olefin from chlorine-containing plastic oil, which comprises the following steps of: sequentially contacting the chlorine-containing plastic oil with a pretreatment catalyst and a dechlorinating agent in a fluidization reactor, and carrying out first catalytic conversion reaction and dechlorinating reaction to obtain a first reaction product containing the low-chlorine plastic oil and a first spent catalyst; preheated low-chlorine plastic oil is introduced from the lower part of the dilute-phase conveying bed reactor to be in contact with a catalytic conversion catalyst, a second catalytic conversion reaction is carried out, an obtained second reaction product and a semi-spent catalyst are fed into the dense-phase fluidized bed to be continuously subjected to a third catalytic conversion reaction, and a third reaction product and a second spent catalyst are obtained; separating a reaction product to obtain low-carbon olefin; the spent catalyst is recycled after being burnt and regenerated. According to the method, the chlorine-containing plastic oil is converted into high-value products such as low-carbon olefin, so that the pollution of the waste plastic to the environment is reduced, the high-value utilization of the waste plastic is realized, and the resource consumption is reduced.

Description

technical field [0001] The invention relates to a method for producing low-carbon olefins by catalytic conversion of chlorine-containing plastic oil. Background technique [0002] my country's plastic market demand is increasing year by year, and about 40 million tons of waste plastics are produced every year, but the recycling rate is only about 30%. With the improvement of environmental protection awareness and the continuous increase of environmental pressure, the main disposal methods of plastics are landfill and incineration, but the bulk density of plastic products is low, and it is not easy to decompose, so it is difficult to effectively achieve reduction and harmlessness in the short term. Chemical; incineration will produce a large amount of greenhouse gases, and release harmful gases such as dioxins. None of the above treatment methods can effectively solve the problem of "white pollution", and it is also a serious waste of petrochemical resources. Therefore, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G57/00
CPCC10G57/00C10G2300/4006C10G2300/4018C10G2300/701C10G2300/202
Inventor 魏晓丽龚剑洪毛安国张久顺刘宪龙宋宝梅
Owner CHINA PETROLEUM & CHEM CORP
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