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Method for producing oxamide by using synthesis ammonia and ammonium bicarbonate coproduction technology

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

Active Publication Date: 2019-09-24
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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  • Method for producing oxamide by using synthesis ammonia and ammonium bicarbonate coproduction technology
  • Method for producing oxamide by using synthesis ammonia and ammonium bicarbonate coproduction technology
  • Method for producing oxamide by using synthesis ammonia and ammonium bicarbonate coproduction technology

Examples

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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, utilizing 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, utilizing 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, utilizing 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 synthesis ammonia and ammonium bicarbonate coproduction technology. The method is implemented according to the steps that 1, by using the synthesis ammonia and ammonium bicarbonate coproduction technology, semi-water gas is fed into a gas holder, the semi-water gas in the gas holder is drawn by a roots blower and desulfurized and then enters a first segment and a second segment of a compressor to be compressed to 0.7 Mpa, after the semi-water gas is cooled to room temperature, a conversion section is omitted, carbon dioxide is directly removed, and raw gas is obtained; 2, the pressure of the raw gas is increased through a third segment of the compressor, the raw gas is heated by using heat conducting oil and then enters a carbonizer in an oxamide workshop, carbonic oxide in the raw gas and ammonium hydroxide in the carbonizer are catalyzed by sulfuric acid to prepare ammonium formate; 3, the ammonium formate is subjected to dual polymerization and dehydrogenation to obtain ammonium oxalate monohydrate, and the ammonium oxalate monohydrate is dehydrated to obtain anhydrous ammonium oxalate; 4, the anhydrous ammonium oxalate is dehydrated to obtain the oxamide. By means of the method, the cost for producing the oxamide is low, the production process is free of popularization, and the operation is simple.

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, 0.04 g at 7°C, 0.6 g at 100°C, melting point 419°C, specific gravity 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 caused by denitrification...

Claims

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Application Information

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Patent Type & Authority Applications(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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