Continuous production technology for microchannel reactor of hydrogenated butadiene-acrylonitrile rubber

A technology of microchannel reactor and hydrogenation of nitrile rubber, which is applied in the field of catalytic hydrogenation of nitrile rubber, can solve the problems of high technical difficulty, difficult composition control, long reaction time, etc., and achieve simple process flow, low production cost and high reaction time. short time effect

Inactive Publication Date: 2013-10-02
PUCHENG RUIYING NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

①Acrylonitrile-ethylene copolymerization method: due to the great difference in the reaction rate of acrylonitrile and ethylene monomers in the copolymerization reaction (γacrylonitrile=0.04, γethylene=0.8), it is difficult to control the composition of the product, and the product chain is branched High degree, poor randomness, poor processing performance, it is still in the stage of small-scale research
At present, homogeneous coordination catalysts and heterogeneous carrier catalysts with palladium (Pd), rhodium (Rh), ruthenium (Ru), etc. are commonly used, but due to the use of expensive metal catalysts, the technology is difficult and the equipment requirements are high.
At present, the reactors used in the above three methods are all batch reactors - kettle reactors, which have a long reaction time and require high temperature and high pressure operation, which cannot fundamentally solve the high cost of synthesizing hydrogenated nitrile rubber, harsh reaction conditions, and poor purity. , low yield, incomplete conversion and other disadvantages

Method used

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  • Continuous production technology for microchannel reactor of hydrogenated butadiene-acrylonitrile rubber
  • Continuous production technology for microchannel reactor of hydrogenated butadiene-acrylonitrile rubber
  • Continuous production technology for microchannel reactor of hydrogenated butadiene-acrylonitrile rubber

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Effect test

Embodiment 1

[0029] 1) Preparation of glue: use one or two solvents such as acetone, tetrahydrofuran, benzene, chlorobenzene and xylene as solvents, NBR as raw material, make NBR concentration 5%, catalyst RhCl(PPh 3 ) 3 The mass ratio to NBR is 100ppm, and the ligand PPh 3 The mass ratio to NBR is 0.01:1.2) The glue solution and hydrogen are continuously sent into the microchannel reactor for hydrogenation reaction, the flow rate is controlled so that the molar ratio of hydrogen to butadiene in NBR is 2:1, and the equivalent diameter of the reactor is 1mm. The residence time of the material in the reactor is 100s, the reactor control temperature is 80°C, and the reactor control pressure is 2MPa. liquid separation tank. 4) Let the reaction product in the gas-liquid separation tank stand still, the gas flows into the hydrogen recovery tank from the upper end of the gas-liquid separation tank, and the product glue flows into the crude product tank through the product discharge pipe of the ...

Embodiment 2

[0031] With each reactant NBR concentration 8% in embodiment 1, catalyst RhCl (PPh 3 ) 3 The mass ratio to NBR is 120ppm, PPh 3 The mass ratio to NBR is 0.015:1, and the others are the same as in Example 1. The hydrogenation degree of the product is 99.5%, and the yield is 99%.

Embodiment 3

[0033] With the NBR concentration 8% in embodiment 1, catalyst RhCl (PPh 3 ) 3 The mass ratio to NBR is 150ppm, PPh 3 The mass ratio to NBR is 0.02:1, and the others are the same as in Example 1. The hydrogenation degree of the product is 99.6%, and the yield is 99%.

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Abstract

The invention provides a continuous production technology for a microchannel reactor of hydrogenated butadiene-acrylonitrile rubber. The continuous production technology for the microchannel reactor of the hydrogenated butadiene-acrylonitrile rubber comprises the following steps of firstly, adding raw materials NBR (nitrile-butadiene rubber), homogeneous catalyst RhCl(PPh3)3 and ligand PPh3 into solvent to prepare glue solution of certain concentration; and under the condition of certain pressure temperature, continuously sending the glue solution and hydrogen into the microchannel reactor for hydrogenation. According to the technology, the characteristics of efficient mass transfer and heat transfer capability and big possibility of being directly amplified of the microchannel are utilized, a single-channel microreactor and a microchannel microreactor are adopted, the hydrogenation degree can be above 99.5%, and the yield of the hydrogenated butadiene-acrylonitrile rubber is higher than 99%. The technology has higher operation safety and high selectivity, the continuous production can be realized for the reaction by controlling the flow of the mixed glue solution of hydrogen with the raw material and the catalyst, and the continuous production technology has the advantages of low energy consumption, short reaction time, high safety, no side effect, simple technical flow and low production cost.

Description

technical field [0001] The invention belongs to the technical field of catalytic hydrogenation of nitrile rubber, in particular to a microchannel reactor continuous production process of hydrogenated nitrile rubber. Background technique [0002] Hydrogenated nitrile rubber (HNBR) is a high elastomer with excellent comprehensive properties developed in recent years. It can be obtained by selectively hydrogenating the double bonds on the chain segment of nitrile rubber (NBR). The reaction equation is as follows: [0003] [0004] Hydrogenated nitrile rubber is a new type of high elastomer, and because of its high saturation structure, it not only maintains the original wear resistance and medium resistance of NBR, but also improves its heat resistance, chemical corrosion resistance, Resistance to O 3 and tensile strength etc. Its application fields have broken through the traditional fields of NBR, and have been widely used in automobiles, ships, oil field drilling and ae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/12C08F8/04
Inventor 高剑峰王艳玲
Owner PUCHENG RUIYING NEW MATERIAL TECH
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