Preparation methods of nitrile and corresponding amine

A technology of manufacturing method and reaction temperature, applied in chemical instruments and methods, preparation of carboxylic acid amide dehydration, preparation of organic compounds, etc., can solve problems such as inconsistent production concept, loss of reaction materials, side reactions, high production cost, etc.

Active Publication Date: 2015-11-04
SINOPEC YANGZI PETROCHEM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, the inventor of the present invention finds by research, and prior art is when producing corresponding aliphatic polyhydric nitrile by aliphatic polycarboxylic acid ammoniation method, in order to make ammoniation fully carry out, this technology must be in the carboxylic acid The ammonia source (ammonia gas) is continuously supplied (introduced) to the reaction system as a raw material during the entire ammoniation process or within a relatively long reaction time, so the amount of ammonia gas is huge, resulting in the actual amount of ammonia gas far exceeding the ammoniation reaction. The required amount may be tens of millions of times the actual reaction requirement, resulting in extremely low ammonia utilization
In addition, due to the extremely low utilization rate of

Method used

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  • Preparation methods of nitrile and corresponding amine
  • Preparation methods of nitrile and corresponding amine
  • Preparation methods of nitrile and corresponding amine

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Embodiment

[0124] The following examples will be used to illustrate the present invention in further detail, but the present invention is not limited to these examples.

[0125] Preparation example of amide intermediate

[0126] Add 500g of carboxylic acid raw material (chemically pure) and NH 3 Ammonia (NH 3 Content is 25wt%, industrial product) or the ammonium ion molarity is the ammonium bicarbonate aqueous solution (the ammonium bicarbonate concentration is 30wt%) of 1.6 times of the carboxyl contained in this carboxylic acid raw material, and the closed reaction kettle is opened and stirred (600r / min) . Make the reaction at the reaction temperature T A T C Hours later, the contents of the reactor were sampled for H NMR and elemental analysis to characterize the amide intermediate. The specific reaction conditions and characterization results are shown in the following Table A-1, Table A-2, Table A-3, Table A-4 and Table A-5. These characterization results show that the obtaine...

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Abstract

The invention relates to a preparation method of nitrile. Compared with the prior art, the preparation method has the characteristics of obvious reduction of the usage amount of ammonia sources, low environmental pressure, low energy consumption, low production cost, high purity and yields of nitrile products, and the like, and can be used for obtaining nitrile with a more complex structure. The invention also relates to a method for preparing corresponding amine with nitrile.

Description

technical field [0001] The invention relates to a process for the production of nitriles and a process for producing corresponding amines from the nitriles. Background technique [0002] Aliphatic polyhydric nitriles such as aliphatic dibasic nitriles are very important chemical intermediates. It and its derivatives have a very wide range of uses. For example, aliphatic diamines, one of its derivatives, are used to produce nylon 66, nylon 1010 and Basic raw material for nylon 1212, etc. [0003] Aliphatic dibasic nitriles, especially advanced aliphatic dibasic nitriles, are prepared industrially using carboxylic acid ammoniation. The widely used process is to heat and dissolve carboxylic acids or their derivatives in an open system, and then continue to Pass ammonia gas into the solution, so that the system reacts in the presence of catalysts such as phosphoric acid or phosphate, and the process contains NH 3 Problems such as excessive dosage, serious material loss and low...

Claims

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Application Information

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IPC IPC(8): C07B43/08C07B43/04C07C255/04C07C253/20C07C255/09C07C255/25C07C255/33C07C323/60C07D241/12C07D213/57C07D333/24C07D307/54C07D207/337C07C255/31C07D317/30C07C211/11C07C211/12C07C211/09C07C211/23C07C211/14C07C211/27C07C211/30C07C323/25C07C319/20C07C211/31C07D213/38C07D333/20C07D307/52C07D207/335C07C211/18C07C211/19C07D317/28C07C209/48
Inventor 孙海龙高以龙魏延雨陈新华缪军李娜阚林柏基业陈韶辉杨爱武许岳兴
Owner SINOPEC YANGZI PETROCHEM
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