Reaction system and process for preparing butyl octanol through propylene carbonylation based on micro-interface reinforcement

A propylene carbonyl and reaction system technology, applied in the field of carbonyl synthesis of butanol and octanol, can solve problems such as low reaction efficiency, and achieve the effects of ensuring reaction rate, saving costs, and strengthening mass transfer

Inactive Publication Date: 2021-03-12
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] To this end, the present invention provides a reaction system and process for preparing butanol and octanol based on micro-interface-enhanced carbonylation of propylene to overcome the problem of low system reaction efficiency caused by inhomogeneous mixing of materials and by-products in the prior art

Method used

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  • Reaction system and process for preparing butyl octanol through propylene carbonylation based on micro-interface reinforcement

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Use the above-mentioned system and process to carry out carbonylation of propylene to prepare butanol, wherein:

[0103] In the process, the reaction temperature in the oxo reactor is 80°C, the reaction pressure is 0.8 MPa, the gas-liquid ratio in the micro-interface generator is 200:1, and the feed molar ratio of propylene to synthesis gas is 2 : 1, the syngas component carbon monoxide accounts for 48.2%, propane accounts for 1.2%, hydrogen accounts for 49.3%, and methane accounts for 1.3%.

[0104] After testing, after using the system and process, the conversion rate of propylene is 98.3%, the conversion rate of butyraldehyde is 97.7%, and the synthesis efficiency of the process is increased by 1.3%.

Embodiment 2

[0106] Use the above-mentioned system and process to carry out carbonylation of propylene to prepare butanol, wherein:

[0107] In the process, the reaction temperature in the oxo reactor is 83°C, the reaction pressure is 0.9MPa, the gas-liquid ratio in the micro-interface generator is 230:1, and the molar ratio of propylene to syngas is 3 : 2, the syngas component carbon monoxide accounts for 49.3%, propane accounts for 0.8%, hydrogen accounts for 48.5%, and methane accounts for 1.4%.

[0108] After testing, after using the system and process, the conversion rate of propylene is 98.5%, the conversion rate of butyraldehyde is 97.9%, and the synthesis efficiency of the process is increased by 1.4%.

Embodiment 3

[0110] Use the above-mentioned system and process to carry out carbonylation of propylene to prepare butanol, wherein:

[0111] In the process, the reaction temperature in the oxo reactor is 87°C, the reaction pressure is 1.0 MPa, the gas-liquid ratio in the micro-interface generator is 270:1, and the feed molar ratio of propylene to synthesis gas is 2 : 1, the syngas component carbon monoxide accounts for 49.7%, propane accounts for 1.2%, hydrogen accounts for 48.3%, and methane accounts for 0.8%.

[0112] After testing, after using the system and process, the conversion rate of propylene is 98.7%, the conversion rate of butyraldehyde is 98.0%, and the synthesis efficiency of the process is increased by 1.3%.

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Abstract

The invention relates to a reaction system and process for preparing butyl octanol through propylene carbonylation based on micro-interface enhancement. The reaction system comprises a carbonyl synthesis unit, a butyraldehyde treatment unit, a butyraldehyde condensation unit, a hydrogenation reaction unit, a purification unit and a micro-interface generator. According to the invention, propylene and synthesis gas are treated by additionally arranging a micro-interface generator, and are crushed to form micron-scale bubbles, and the micron-scale bubbles and a rhodium catalyst triphenylphosphinesolution are mixed to form a gas-liquid emulsion to increase the phase interface area of a gas phase and a liquid phase and achieve the effect of enhancing mass transfer within a lower preset operation condition range, so that the carbonyl synthesis efficiency of propylene and synthesis gas is improved, the propylene reaction efficiency and utilization rate are improved, the propylene utilizationrate is increased, the production cost of butyl octanol is reduced, and the requirements of existing circular economy are met.

Description

technical field [0001] The invention relates to the technical field of synthesizing butanol and octanol by carbonyl method, in particular to a reaction system and process for preparing butanol and octanol by carbonylation of propylene based on micro-interface strengthening. Background technique [0002] Butyl octanol is an important raw material for the synthesis of fine chemical products. At present, the output of butylated octanol in my country is huge, accounting for about 21% of the world's total. Butyl octanol uses synthesis gas and propylene as raw materials, and generates n-isobutyraldehyde through formylation reaction , and then get n-isobutanol, and two molecules of n-butyraldehyde can be condensed to generate octanol, so it is customarily called butanol. Butanol and octanol have the typical characteristics of organic alcohols, both have a special odor, are colorless, transparent, flammable liquids, are moderately toxic, and can form azeotropes with water. Mainly us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/17C07C31/125C07C45/50C07C47/02C07C45/74C07C47/21
CPCC07C45/50C07C29/175C07C45/74C07C47/02C07C31/125C07C47/21C07C29/17B01F23/20B01F27/80
Inventor 张志炳周政张锋李磊孟为民王宝荣杨高东罗华勋杨国强田洪舟
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD
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