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A method for producing oxamide by using synthetic ammonia-co-production ammonium bicarbonate process

A technology of ammonium bicarbonate and oxamide, which is applied in the preparation of carboxylic acid amide, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problem of high production cost of oxamide, and achieve the effect of low cost and simple process

Active Publication Date: 2022-05-03
陕西同泽人居工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for producing oxamide by using synthetic ammonia-co-production ammonium bicarbonate process, which solves the problem of high production cost of oxamide

Method used

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  • A method for producing oxamide by using synthetic ammonia-co-production ammonium bicarbonate process
  • A method for producing oxamide by using synthetic ammonia-co-production ammonium bicarbonate process
  • A method for producing oxamide by using synthetic ammonia-co-production ammonium bicarbonate process

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Effect test

Embodiment 1

[0041] A kind of method of the present invention utilizes synthetic ammonia-co-production ammonium bicarbonate process to produce oxamide, specifically implements according to the following steps:

[0042] Step 1, using the synthetic ammonia-co-production ammonium bicarbonate process, the semi-water gas (H 2 36-37, CO32-35, N 2 21-22, CO 2 6-9) Send it into the gas cabinet, and then use the Roots blower to extract the semi-water gas in the gas cabinet. After desulfurization, it enters the first stage and the second stage of the compressor to compress to 0.7Mpa. After cooling to room temperature, cancel the transformation section and directly enter the carbonization workshop for removal Carbon dioxide, that is, raw material gas; the removed carbon dioxide reacts with ammonia water to produce ammonium bicarbonate;

[0043] Step 2, the raw material gas obtained in step 1 is raised to 1.8Mpa through the three stages of the compressor, and the raw material gas after the raised pr...

Embodiment 2

[0052] A kind of method of the present invention utilizes synthetic ammonia-co-production ammonium bicarbonate process to produce oxamide, specifically implements according to the following steps:

[0053] Step 1, using the synthetic ammonia-co-production ammonium bicarbonate process, the semi-water gas (H 2 36-37, CO32-35, N 2 21-22, CO 2 6-9) Send it into the gas cabinet, and then use the Roots blower to extract the semi-water gas in the gas cabinet. After desulfurization, it enters the first stage and the second stage of the compressor to compress to 0.7Mpa. After cooling to room temperature, it enters the carbonization workshop to remove carbon dioxide, and the raw material is obtained gas; the removed carbon dioxide reacts with ammonia water to produce ammonium bicarbonate;

[0054] Step 2: Raise the pressure of the raw material gas obtained in step 1 to 1.7Mpa through three stages of the compressor, use heat transfer oil to heat the raw material gas after the pressure ...

Embodiment 3

[0063] A kind of method of the present invention utilizes synthetic ammonia-co-production ammonium bicarbonate process to produce oxamide, specifically implements according to the following steps:

[0064] Step 1, using the synthetic ammonia-co-production ammonium bicarbonate process, the semi-water gas (H 2 36-37, CO32-35, N 2 21-22, CO 2 6-9) Send it into the gas cabinet, and then use the Roots blower to extract the semi-water gas in the gas cabinet. After desulfurization, it enters the first stage and the second stage of the compressor to compress to 0.7Mpa. After cooling to room temperature, it enters the carbonization workshop to remove carbon dioxide, and the raw material is obtained gas; the removed carbon dioxide reacts with ammonia water to produce ammonium bicarbonate;

[0065] Step 2: Raise the pressure of the raw material gas obtained in step 1 to 1.9Mpa through three stages of the compressor, use heat transfer oil to heat the raw material gas after the pressure ...

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Abstract

The invention discloses a method for producing oxamide by using a synthetic ammonia-co-production ammonium bicarbonate process, which is implemented according to the following steps: Step 1, using the synthetic ammonia-co-production ammonium bicarbonate process, sending semi-water gas into the gas holder, and then The gas blower extracts the semi-water gas in the gas tank, and after desulfurization, enters the first stage and second stage of the compressor to compress to 0.7Mpa. After cooling to room temperature, cancel the transformation section, directly remove carbon dioxide, and obtain raw material gas; step 2, pass the raw material gas through the compressor The pressure is increased in three stages, and then the raw material gas is heated with heat transfer oil, and then enters the carbonization tower of the oxamide workshop. The carbon monoxide in the raw gas and the ammonia water in the carbonization tower are catalyzed by sulfuric acid to produce ammonium formate; Ammonium oxalate monohydrate is obtained by dimerization and dehydrogenation, and ammonium oxalate anhydrous is obtained by dehydration of ammonium oxalate monohydrate; step 4, oxamide is obtained after dehydration of ammonium oxalate anhydrous. The oxamide produced by the method of the invention has low cost, no pollution in the production process and simple operation.

Description

technical field [0001] The invention belongs to the technical field of oxamide production methods, and in particular relates to a method for producing oxamide by using a synthetic ammonia-co-production ammonium bicarbonate process. Background technique [0002] Oxamide is also known as oxamide, oxalamide. Molecular formula: (CONH 2 ) 2 , containing 31.81% nitrogen, white crystal, slightly soluble in hot water and ethanol, almost insoluble in cold water, solubility at 7°C is 0.04 g, at 100°C 0.6 g, melting point is 419°C, specific gravity is 1.667, non-absorbent, non-toxic, Can be stored indefinitely. [0003] Agricultural practice has proved that oxamide is an excellent nitrogen fertilizer for slow application. Among many slow / controlled release fertilizers, oxamide ((CONH 2 ) 2 ) has relatively broad development and application prospects. It can meet the needs of crops for nitrogen throughout the growth period, reduce nitrogen leaching, volatilization, and losses cause...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C231/10C07C233/56
CPCC07C231/10C01C1/26C07C51/41C07C233/56C07C53/06C07C55/07
Inventor 卓泽凡刘长有
Owner 陕西同泽人居工程科技有限公司
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