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Heating system for producing N,N-di(1-methylheptyl) acetamide

A heating system and methyl heptyl technology are applied in the preparation of carboxylic acid amides, the preparation of organic compounds, chemical recovery and other directions, which can solve the problems of Ruanlai nickel catalyst damage, low power factor of electric induction heaters, and many side reactions, etc. Improved safety factor, significant social and economic benefits, and improved working environment

Inactive Publication Date: 2002-05-22
邵阳市化工研究所
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Problems solved by technology

[0006] The use of electric induction heating has the following defects for the ammonolysis reaction: 1. Because the wall temperature of the reactor is as high as 300°C or more, and the temperature is uneven, the reactants are easy to carbonize, and the Ruanlai nickel catalyst is damaged, which reduces its service life and has many side reactions. Resulting in poor product quality, high raw material consumption and high cost
2. Among all electric heaters, the electric induction heater has the lowest power factor and consumes a lot of power
3. Electric induction heating requires high hygienic environmental conditions and is unsafe
Reactants and products contacting the coil may cause accidents

Method used

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  • Heating system for producing N,N-di(1-methylheptyl) acetamide
  • Heating system for producing N,N-di(1-methylheptyl) acetamide

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Embodiment Construction

[0012] Further description will be made below in conjunction with the accompanying drawings of the embodiments:

[0013] like figure 1 Shown, is heating system A, and reactant methylheptanol and ammonia and catalyzer Raney nickel are injected in reactor 2, stir evenly by stirrer 21, because this ammonolysis reaction is endothermic reaction, so need supplementary heat in the reaction process, reaction The kettle 2 is jacketed, and the liquid heat transfer medium (such as heat transfer oil) 7 is used as the heat carrier. First, the heat transfer oil is heated by burning coal through the oil boiler 1, and the heat transfer oil 7 is driven into the jacket of the reaction kettle 2 by the heat oil pump 3 Inside, after heat exchange with the reactants, the heat transfer oil overflows to the oil boiler 1 from the upper part. This cycle is repeated, and the heat is constantly added to promote the completion of the reaction.

[0014] like figure 2 As shown, it is a heating system B,...

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Abstract

The present invention belongs to a heating system for preparing N,N-di(1-methyl heptyl) acetylamine. It mainly uses heat-conducting oil as heat-transfer medium, and is heated by means of external heat source, and placed into the jacket of the reactor to make heat-exchange with reactant in the reactor to provide the heat-energy required for making aminolysis reaction.

Description

technical field [0001] The invention belongs to an indirect heating system used in organic chemical production. Background technique [0002] N-503 [N, N-bis (1-methylheptyl) acetamide] ammonolysis reaction is the main reaction to produce N-503. [0003] Ammonolysis reaction main reaction formula: [0004] The reaction mechanism is that when methylheptanol is hydrogenated and ammolyzed under the catalysis of Ruanlai nickel, it will first dehydrogenate to form aldehyde, then add ammonia to it, dehydrate to form imine, and then hydrogenate to the corresponding primary amine, which reacts with methylheptanol Reaction and dehydration to obtain diamine. The ammoniation reaction generally takes 12 hours to 14 hours. As the concentration of the product increases, the temperature of the material in the reactor gradually increases. When the temperature of the material reaches 200°C, it is regarded as the end of the reaction. [0005] In the past, the ammonolysis reaction to make...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/10C07C233/05
CPCY02P20/582
Inventor 周达人龙佩兰张国政
Owner 邵阳市化工研究所
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