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Process and device for preparing urotropine by using gas phase method

A technology for the preparation of hexamethamine and its preparation technology, which is applied in the field of gas-phase method of preparation of hexatropine, can solve the problems of low purity of finished products, large ammonia loss, etc., and achieve good product quality, continuous production, and complete recovery Effect

Inactive Publication Date: 2010-08-04
JIANGSU KAIMAO PETROCHEM TECH
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Problems solved by technology

However, the purity of its finished product is low, and the loss of ammonia is relatively large

Method used

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  • Process and device for preparing urotropine by using gas phase method
  • Process and device for preparing urotropine by using gas phase method
  • Process and device for preparing urotropine by using gas phase method

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Embodiment Construction

[0024] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0025] Such as figure 1 , figure 2 , image 3 , Figure 4 The shown gas-phase method hexatropine preparation device has an ammoniation reactor 1, a crystallization tank 2 is connected to the material outlet at the lower end of the ammoniation reactor 1, a centrifuge 3 is connected to the crystallization tank 2, and a centrifuge 3 is connected to a Drying system 4, the upper end of the drying system 4 is connected with a recovery washing tower 5, the upper end of the ammoniation reactor 1 is connected with an ammonia absorption tower 5, the upper end of the ammonia absorption tower 5 is connected with a condenser 7, and the lower part of the condenser 7 is ...

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Abstract

The invention relates to the production field of urotropine, in particular to a process and a device for preparing urotropine by using a gas phase method. The process comprises the following steps: directly introducing formaldehyde gas generated after the conversion of formaldehyde into an ammonization reactor to react the formaldehyde gas with excessive ammonia in mother solution of urotropine, evaporating the water brought by formaldehyde conversion gas and the reaction generated water under vacuum by using the latent heat of the formaldehyde gas and the reaction generated heat to generate concentrated solution containing urotropine crystal, then centrifuging, dehydrating and drying the concentrated solution to obtain solid powdery urotropine, and reclaiming the excessive ammonia through a resolution tower and then returning the excessive ammonia to the ammonization reactor. The reaction and the concentration are performed in the urotropine reactor at the same time; the process has the advantages of high efficiency, energy conservation, continuous production, short reaction time and good product quality; and the heat energy of the system can be fully and comprehensively utilized and completely reclaimed so as to meet the national requirements of energy conservation and emission reduction.

Description

technical field [0001] The invention relates to the production field of urotropine, in particular to a process and a device for preparing urotropine by gas phase method. Background technique [0002] Urotropine is used as a curing agent for resins and plastics, as a vulcanization accelerator for rubber (accelerator H), as an anti-shrinkage agent for textiles, and for making fungicides, explosives, etc. When used as a medicine, it can be used for mild urinary tract infection after being decomposed by acidic urine to produce formaldehyde after oral administration. Mixed with caustic soda and sodium phenate, used in gas masks as phosgene absorbent. Urotropine is also a common corrosion inhibitor used to slow down the corrosion of metal materials. [0003] The industrial production of urotropine in my country began in 1956, and the increase in demand for urotropine will stimulate the improvement of the production process of urotropine. As far as the current situation is conce...

Claims

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Application Information

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IPC IPC(8): C07D487/18
Inventor 叶子茂张文祥张忠良
Owner JIANGSU KAIMAO PETROCHEM TECH
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