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Device and method for oxidizing low carbon olefin to prepare low carbon epoxy hydrocarbon compound

A technology of carbon epoxy hydrocarbons and low carbon olefins, which is applied in the field of devices for producing low carbon epoxy hydrocarbons, can solve the problems of large fluctuation range of reaction temperature, inability to remove reaction heat in time, difficulty in solvent methanol recovery, etc., to achieve reaction Small temperature fluctuation range, flexible control, and environment-friendly effects

Active Publication Date: 2018-10-12
洛阳市科创石化科技开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a device and method for preparing low-carbon epoxy hydrocarbons by oxidation of low-carbon olefins, which overcomes the difficulties in the recovery of solvent methanol in the prior art, the inability to remove the reaction heat in time, the large fluctuation range of reaction temperature, and the separation and purification. Complicated, large equipment investment, environmental pollution and other defects

Method used

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  • Device and method for oxidizing low carbon olefin to prepare low carbon epoxy hydrocarbon compound

Examples

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Embodiment 1

[0068] A method for generating low-carbon epoxy hydrocarbons by oxidation of low-carbon olefins, the steps are:

[0069] 1) Send the first part of low-carbon olefin raw materials into the reactor from the bottom of the reactor, and fluidize the catalyst in the pre-fluidization section of the reactor to make the catalyst in a dense-phase fluidized state. After mixing the second part of low-carbon olefin raw materials with hydrogen peroxide Atomized into the reactor through multi-stage atomizing nozzles, the distribution ratio of the first part of light olefins and the second part of low-carbon olefins is 2:1, atomized through multi-stage atomizing nozzles, and fluidized in the dense phase circulation of the reactor In the section, under the action of TS-1 molecular sieve catalyst, the reaction temperature is 60°C, the reaction pressure is 0.08Mpa, the weight ratio of catalyst to hydrogen peroxide is 5:1, and the molar ratio of low carbon olefins to hydrogen peroxide is 5 Carry ...

Embodiment 2

[0074] In step (1), the distribution ratio of the first part of low-carbon olefins and the second part of low-carbon olefins is 5:1, and the reaction temperature of low-carbon olefins and hydrogen peroxide is 70°C and the reaction pressure is 0.10Mpa;

[0075] In the step (3), the temperature of the compressor is 35°C, the pressure is 1.5Mpa, the temperature at the top of the fractionating tower is 50°C, the temperature at the bottom of the tower is 100°C, and the pressure of the fractionating tower is 1.3Mpa; the light olefin is ethylene.

[0076] Others are with embodiment 1.

Embodiment 3

[0078] In step (1), the distribution ratio of the first part of low-carbon olefins and the second part of low-carbon olefins is 10:1, and the reaction temperature of low-carbon olefins and hydrogen peroxide is 100 ° C, the reaction pressure is 0.12Mpa, and the weight ratio of catalyst to hydrogen peroxide is 15: 1. The molar ratio of light olefins to hydrogen peroxide is 9:1;

[0079] Compressor temperature is 45 ℃ in the step (3), and pressure is 2.0Mpa, and fractionation tower top temperature is 55 ℃, and tower bottom temperature 110 ℃, and fractionation tower pressure is 1.6Mpa; Getting heat medium is hydrogen peroxide.

[0080] Others are with embodiment 1.

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Abstract

The invention discloses a device and a method for oxidizing low carbon olefin to prepare a low carbon epoxy hydrocarbon compound. Low carbon olefin and hydrogen peroxide are subjected to an oxidizingreaction to generate the compound containing low carbon epoxy hydrocarbon under existing of a TS-1 molecular sieve catalyst in a dense-phase circulating fluidized bed reactor, a distribution riser anda multi-stage feeding atomizer are arranged on the reactor, a low carbon olefin raw material enters the reactor in sections, a heat taking cooler is arranged in the reactor, the heat generated in thereaction process is taken timely, the reaction temperature is controlled to fluctuate in the range of -3 DEG C and 3 DEG C, the hydrogen peroxide selectivity and the converting rate of low carbon olefin are improved, and the raw material which is not reacted returns back to a raw material inlet to be reused. The device and the method have the advantages that the reaction heat is removed timely, the reaction temperature fluctuation is small, separation and purification are simple, the equipment investment is less, and the environment is cleaned and the like.

Description

technical field [0001] The invention relates to the technical field of olefin oxidation, in particular to a device and method for directly oxidizing low-carbon olefins to produce low-carbon epoxy hydrocarbons. Background technique [0002] Propylene oxide (PO for short) is a colorless, transparent, low-boiling flammable liquid at normal temperature and pressure, with an ether-like odor. Freezing point -112.13°C, boiling point 34.24°C, density 0.8309 / cm3 (20°C), refractive index (nD) 1.3664, viscosity (25°C) 0.28mPa·s. Partially miscible with water, the solubility in water at 20°C is 40.5% (mass), and the solubility of water in propylene oxide is 12.8% (mass), miscible with ethanol and ether, and with dichloromethane, pentane, pentene, Cyclopentane, cyclopentene, etc. form binary azeotropes. [0003] The current industrial production methods of PO mainly include the chlorohydrin method and the co-oxidation method (Halcon method), which account for more than 90% of the globa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/12C07D303/04
CPCC07D301/12C07D303/04
Inventor 龚旭辉葛永达
Owner 洛阳市科创石化科技开发有限公司
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