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Reactor, system and method for producing tripolycyanamide

A melamine and reactor technology, applied in the field of melamine preparation in a multi-layer fluidized bed, can solve the problems of low urea conversion rate by-products, etc., achieve the effects of reducing energy consumption, increasing single-pass yield, and reducing process load

Active Publication Date: 2010-09-08
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The purpose of this invention is to provide a new reactor for the production of melamine, to overcome the low urea conversion rate in the prior art, too many by-product defects

Method used

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  • Reactor, system and method for producing tripolycyanamide
  • Reactor, system and method for producing tripolycyanamide
  • Reactor, system and method for producing tripolycyanamide

Examples

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Embodiment Construction

[0030] figure 2 A specific example of a reactor according to the invention is shown. In the figure, the reactor 2 is a vertical cylinder, which is divided into a lower reaction section 21 and an upper cooling section 22 by a cooling section gas distributor 23 . One or more cyclones 24 are arranged in the cooling section 22 , the discharge legs 242 of which extend to the reaction section 21 . Preferably, it extends into the dense phase region of the reaction section. An overflow pipe 25 is also provided in the reactor 2 for balancing the materials in the reaction section 21 and the cooling section 22 . In the state of use, the upper port of the overflow pipe 25 is located at the junction of the dense-phase area and the dilute-phase area of ​​the cooling section, and the lower end is located at the dense-phase area of ​​the reaction section. Preferably, a double-cone member 252 is provided at the lower end of the overflow pipe to prevent gas short circuit. The gas distribut...

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PUM

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Abstract

The invention relates to a reactor, a system and a method for producing tripolycyanamide. The invention relates to a reactor and a production system comprising the same. The reactor is a two-section cylindrical reactor and comprises a reaction section, a cooling section, a gas distributor arranged between the reaction section and the cooling section and a cyclone separator arranged on the coolingsection, wherein the reaction section and the cooling section are provided with catalysis reaction beds. The reactor and the system can improve the once through yield of products and reduce energy consumption.

Description

technical field [0001] The invention belongs to the field of chemical product melamine production. It specifically relates to the process technology and equipment for preparing melamine by using a multi-layer fluidized bed. Background technique [0002] At present, the production of melamine generally adopts the raw material route of urea. The catalytic synthesis reaction equation of melamine is as follows: [0003] [0004] The melamine generated may be further condensed to generate by-products such as melem, melam, and the reaction equation is as follows: [0005] 2C 3 h 6 N 6 →C 6 h 6 N 10 +2NH 3 (3) [0006] The reaction to generate melem, melem and other by-products is reversible, and the reaction equation is as follows: [0007] C 6 h 6 N 10 +2NH 3 →C 3 h 6 N 6 (4) [0008] The typical production process of gas-phase catalytic quenching melamine in China is shown in Figure-1, and the description is as foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/28C07D251/60
Inventor 易江林唐印龚元德熊锡焜陈勇恩付源夔匡向东
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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