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Method for improving productivity of low carbon olefin hydrocarbon in biological oil and fat catalytic conversion reaction

A carbon olefin yield and bio-oil technology, which is applied in the field of catalytic conversion of bio-oil, can solve the problem of low-carbon olefin yield decline, and achieve the effects of inhibiting re-conversion reaction, increasing yield, and high and low-carbon olefin yield

Active Publication Date: 2013-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors found through laboratory research: under the reaction conditions for preparing low-carbon olefins from bio-oil catalytic conversion and the presence of acidic zeolite, low-carbon olefins can be converted into other hydrocarbons, hydrogen and coke in large quantities and rapidly after they are generated. This leads to a significant decrease in the yield of low-carbon olefins

Method used

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  • Method for improving productivity of low carbon olefin hydrocarbon in biological oil and fat catalytic conversion reaction
  • Method for improving productivity of low carbon olefin hydrocarbon in biological oil and fat catalytic conversion reaction
  • Method for improving productivity of low carbon olefin hydrocarbon in biological oil and fat catalytic conversion reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This example illustrates: using the method provided by the present invention, the catalytic reaction activity of low-carbon olefins on a small fixed fluidized bed experimental device when hydrogen is injected into the reactor.

[0039] The composition of the catalyst used in Example 1 is as follows: based on the total weight of the catalyst, the content of the zeolite with MFI structure and modified β zeolite are 20% by weight, 10% by weight, and 20% by weight, respectively Al 2 O 3 , 50% by weight kaolin. Among them, β zeolite is modified by phosphorus and Zn (P 2 O 5 The weight content of ZnO and ZnO are 1.5% and 1.6% respectively).

[0040] The experiment uses raw material A as the raw material and adopts a batch operation mode. The raw materials, hydrogen and atomized steam are heated to about 350°C in the preheating furnace, and then enter the bottom of the fluidized bed reactor through the feed nozzle, and contact the hot catalyst for catalytic conversion reaction . ...

Embodiment 2

[0046] This example illustrates the result of the catalytic conversion reaction of bio-oil when hydrogen is injected into the reactor using the method provided by the present invention.

[0047] The composition of the catalyst used in Example 2 is the same as that of Example 1.

[0048] The experiment uses palm oil as raw material B and is carried out on a medium riser device with continuous reaction-regeneration operation. The riser has an inner diameter of 16 mm and a height of 6 meters. Take the raw material nozzle of the riser as a starting point, and define the effective length of the riser as 100% along the flow direction of the raw material, and the hydrogen injection position is 40% of the riser.

[0049] The experiment adopts a single pass operation mode. The regenerated catalyst with a temperature of about 700°C enters the bottom of the riser reaction section through the regeneration inclined pipe, and flows upward under the action of the pre-lift steam. Palm oil raw mat...

Embodiment 3

[0056] This example illustrates: using the method provided by the present invention, the catalytic cracking dry gas produced by the device is used as a hydrogen-rich gas, and the hydrogen-rich gas is recycled and injected into the bottom of the fluidized bed. .

[0057] The composition of the catalyst used in Example 3 is as follows: based on the total weight of the catalyst, the content of the zeolite with MFI structure and the modified β zeolite are 25% by weight, 15% by weight, and 15% by weight, respectively SiO 2 And Al 2 O 3 , 45% by weight kaolin. Among them, β zeolite is modified by phosphorus and Mn (P 2 O 5 The weight content of MnO and MnO are 1.5% and 1.5% respectively).

[0058] The experiment uses lard as raw material C, and is carried out on a medium riser + fluidized bed device with continuous reaction-regeneration operation. The inner diameter of the riser is 16 mm and the height is 6 meters. Above the outlet of the riser is a fluidized bed. The inner diameter of...

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Abstract

A method for improving yield of low-carbon alkenes in bio-oil catalytic transformation reaction comprises the following steps: preheating bio-oil materials, injecting into a catalytic transformation reactor, contacting and reacting with a catalyst containing modified beta-zeolite, injecting a hydrogen-rich gas into the reactor, separating the reacted oil gas from the catalyst with carbon deposition, separating the reacted oil gas to obtain the target product containing low-carbon alkenes, processing the catalyst with carbon deposition by stripping and regenerating, and adding into the reactor for recycling. By injecting the hydrogen-rich gas into the reactor, the method can remarkably inhibit the retransformation reaction after the generation of low-carbon alkenes, thus improving the yield of low-carbon alkenes. When a riser and fluidized bed reactor using lard as the raw materials is selected, the yields of ethylene, propylene and butylene are respectively 5.69 wt percent, 25.65wt percent and 15.78wt percent, which are respectively higher than the yields without the addition of the hydrogen-rich gas by 1.51 percent, 2.54 percent and 1.44 percent.

Description

Technical field [0001] The invention belongs to a method for catalytic conversion of biological oils, and more specifically, is a method for improving the yield of C2-C4 low-carbon olefins in the catalytic conversion of biological oils. Background technique [0002] At present, the production of low-carbon olefins worldwide is mainly based on the tube furnace steam cracking method with light petroleum hydrocarbons as raw materials and the catalytic cracking method with heavy petroleum hydrocarbons as raw materials. Petroleum hydrocarbon is a non-renewable resource. According to statistics, the world's proven petroleum hydrocarbon resources can only be exploited for about 80 years at the current level of exploitation. With the massive consumption of petroleum hydrocarbon resources and the declining reserves, the use of renewable bio-oil as an alternative resource for petroleum hydrocarbons to produce low-carbon olefins will be a beneficial supplement to the current low-carbon olef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00
Inventor 李正谢朝钢朱根权龙军汪燮卿舒兴田罗一斌宋宝梅
Owner CHINA PETROLEUM & CHEM CORP
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