Method for producing alkyl nitrite ester

A technology of alkyl nitrite and alkanol, which is applied in the preparation of nitrite, organic chemistry, etc., can solve the problem of low selectivity of alkyl nitrite, achieve compact design, low use and maintenance costs, and reduce The effect of processing costs

Active Publication Date: 2011-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The technical problem to be solved by the present invention is the low technical problem of the selec

Method used

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  • Method for producing alkyl nitrite ester
  • Method for producing alkyl nitrite ester

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The gas volume of raw material gas containing nitrogen oxides is 100m 3 / h, wherein, the concentration of NO is 10%v (the rest is nitrogen), and the gas volume of oxygen is 2m 3 / h, two streams of gas directly enter the prereactor 9 through the prereactor gas inlet 5, and the reacted gas enters the rotating packed bed reactor 8 through the gas inlet 1 of the rotating packed bed reactor, and diffuses into the rotating packed bed reactor 8 under the action of the pressure difference Filler 2, the rotating speed of the filler is adjusted to 2000rpm. The methanol solution is introduced into the liquid distributor 6 of the rotary packed bed 8 and the inner side of the rotary packing 2 through the liquid inlet line 12 through the liquid inlet 4. The molar ratio of nitrogen oxides and methanol in the gas is 1: 30, and the gas and liquid are in the packing. Countercurrent contact, the gas effluent containing methyl nitrite generated by the reaction is discharged through the ga...

Embodiment 2

[0034] The gas volume of raw material gas containing nitrogen oxides is 100m 3 / h, wherein, the concentration of NO is 21%v (the rest is nitrogen), and the gas volume of oxygen is 4m 3 / h, two streams of gas directly enter the prereactor 9 through the prereactor gas inlet 5, and the reacted gas enters the rotating packed bed reactor 8 through the gas inlet 1 of the rotating packed bed reactor, and diffuses into the rotating packed bed reactor 8 under the action of the pressure difference Filler 2, the rotating speed of the filler is adjusted to 4000rpm. The methanol solution is introduced into the liquid distributor 6 of the rotary packed bed 8 and the inner side of the rotary packing 2 through the liquid inlet line 12 through the liquid inlet 4. The molar ratio of nitrogen oxides and methanol in the gas is 1: 10, and the gas and liquid are in the packing. Countercurrent contact, the gas effluent containing methyl nitrite generated by the reaction is discharged through the ga...

Embodiment 3

[0036] The gas volume of raw material gas containing nitrogen oxides is 100m 3 / h, wherein the concentration of NO is 18% v (the rest is nitrogen), and the gas volume of oxygen is 2.3m 3 / h, two streams of gas directly enter the prereactor 9 through the prereactor gas inlet 5, and the reacted gas enters the rotating packed bed reactor 8 through the gas inlet 1 of the rotating packed bed reactor, and diffuses into the rotating packed bed reactor 8 under the action of the pressure difference Filler 2, the rotating speed of the filler is adjusted to 6000rpm. The methanol solution is introduced into the liquid distributor 6 of the rotary packed bed 8 and the inner side of the rotary packing 2 through the liquid inlet line 12 through the liquid inlet 4. The molar ratio of nitrogen oxides and methanol in the gas is 1:50, and the gas and liquid are in the packing. Countercurrent contact, the gas effluent containing methyl nitrite generated by the reaction is discharged through the g...

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Abstract

The invention relates to a method for producing alkyl nitrite ester. The use of the method is aimed to mainly solving the technical problem of low selectivity of the target product-the alkyl nitrite ester in the prior art. In the method, a technical scheme is adopted as follows: the method comprises the following steps: (a) firstly, leading nitric oxide and oxygen into a prereactor, contacting with an aluminosilicate catalyst, and reacting to produce effluent I containing NO2 and unreacted NO; and (b) leading the effluent I and raw materials C1-C4 alkanol into a revolving filler bed reactor respectively, and carrying out contact reaction on revolving filler of the revolving filler bed reactor under the conditions that the reaction temperature is at 0-150 DEG C, the mole ratio of the C1-C4 alkanol and the nitric oxide is (1-100):1 and the mol ratio of the nitric oxide and the oxygen is (4-50):1, wherein the revolving filler bed reactor is directly connected with the prereactor (9), a liquid outlet (7) is arranged at the bottom of the revolving filler bed reactor and is communicated by a liquid outlet pipeline (10), a liquid distributor (6) is arranged in a pipeline of a liquid inlet (4), the liquid inlet (4) is communicated by a liquid inlet pipeline (12), and revolving filler (2) is fixed on a motor shaft (11), thus better solving the problem of low selectivity and being used for industrial production of increasing the C1-C4 alkyl nitrite ester.

Description

technical field [0001] The invention relates to a method for producing alkyl nitrite, in particular to a method for producing C1-C4 alkyl nitrite required for producing oxalate through CO coupling. Background technique [0002] Oxalate is an important organic chemical raw material, which is widely used in the fine chemical industry to produce various dyes, medicines, important solvents, extractants and various intermediates. In the 21st century, oxalate, as a degradable and environmentally friendly engineering plastic monomer, has received extensive international attention. In addition, oxalic acid can be obtained by normal pressure hydrolysis of oxalate, and oxalamide can be obtained by normal pressure ammonia solution. Oxalate can also be used as a solvent to produce pharmaceutical and dye intermediates, etc., such as various condensation reactions with fatty acid esters, cyclohexylacetophenone, amino alcohols, and many heterocyclic compounds. It can also synthesize thym...

Claims

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Application Information

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IPC IPC(8): C07C203/00C07C201/04
Inventor 刘俊涛王万民孙凤侠
Owner CHINA PETROLEUM & CHEM CORP
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