Assisting method for steam thermal cracking of hydrocarbon raw materials

A thermal cracking and raw material technology, applied in the direction of hydrocarbon cracking, hydrocarbon production, organic chemistry, etc., can solve the problems of inability to effectively promote the cracking of hydrocarbon raw materials, low solubility of initiators, and poor effect, so as to improve the utilization rate of raw materials and reduce the temperature , the effect of speeding up the reaction rate

Inactive Publication Date: 2018-05-08
ZHEJIANG UNIV
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Problems solved by technology

However, the initiators in the prior art have low solubility and poor effect in hydrocarbon feedstocks, and cannot effectively promote the cracking of hydrocarbon feedstocks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: take ethylenediamine as the preparation of oil-soluble hyperbranched polymer (C-PAMAM) of initiator

[0037] Dissolve 20.0g of ethylenediamine in 5mL of anhydrous methanol, dissolve 28.5g of methyl acrylate in 20ml of anhydrous methanol, drop them into the reaction system, and stir vigorously at room temperature for 48h. The reaction product was decompressed and combined to obtain a product with a high degree of polymerization. Set the temperature rise program from 60°C to 140°C, and the reaction time was 8h; after the crude product was cooled to room temperature, it was poured into 200mL ether and stirred for 30min, and the lower layer was obtained with light yellow fluorescence. The transparent viscous liquid was discarded, the upper layer of ether was discarded, the precipitation was repeated twice, and the hyperbranched polymer PAMAM was obtained by rotary evaporation at 40°C under vacuum.

[0038] Dissolve 2.0 g of the synthesized hyperbranched polyme...

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Abstract

The invention relates to an assisting method for steam thermal cracking of hydrocarbon raw materials. The method is characterized by comprising the step: adding an oil-soluble hyperbranched polymer into the hydrocarbon raw materials to carry out steam thermal cracking, wherein the oil-soluble hyperbranched polymer is prepared by grafting palmitoyl chloride to an amino group at the tail end of hyperbranched polyamide. By using the method, the effects of triggering and inducing the hydrocarbon raw materials to be cracked, increasing the reaction rate and reducing the reaction temperature can beachieved.

Description

technical field [0001] The invention relates to the technical field of thermal cracking of hydrocarbon raw materials, in particular to a method for assisting steam thermal cracking of hydrocarbon raw materials. Background technique [0002] Ethylene and propylene are important organic chemical raw materials. As the demand for ethylene and propylene increases year by year, the demand ratio of propylene / ethylene (P / E) is on the rise. In 2016, the world's ethylene consumption was about 164 million tons per year, and propylene The consumption is about 101 million tons / year, and the P / E demand ratio rises to 0.616. [0003] Steam thermal cracking of hydrocarbons is a leading petrochemical process and a traditional technology for the production of ethylene and propylene. Although the technology has been continuously improved after decades of development, the tube furnace cracking usually uses a relatively high reaction temperature (800-900°C ), and the P / E output mass ratio is 0....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/06C07C11/04C08G73/02
CPCC07C4/06C08G73/028C07C11/06C07C11/04
Inventor 方文军郭永胜叶灯枫张丽锋应好
Owner ZHEJIANG UNIV
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