Production process of pyrolysis cyanuric acid

A production process, cyanuric acid technology, applied in the direction of organic chemistry, etc., can solve the problems of large power consumption, gas leakage, large power consumption, etc., and achieve the effects of improving heat energy utilization, saving land occupation, and reducing heat loss

Inactive Publication Date: 2016-08-31
王建伍 +1
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas generator needs to consume a large amount of coal, 330Kg of coal is consumed for producing one ton of cyanuric acid, 16,500 tons of coal is consumed for 50,000 tons of cyanuric acid per year, and a large amount of waste gas is produced by burning coal: 16,500 tons of coal produces 264 tons of SO 2 , 42240 tons of CO 2 , must be equipped with desulfurization, dust removal waste gas treatment facilities, not only the investment is large, but also a large amount of pollutants will be discharged into the atmosphere after the waste gas treatment, causing environmental pollution
In order to ensure the reaction conditions of 250-280°C in the pyrolysis furnace, the temperature of the hot air exiting the pyrolysis f...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: the temperature is 135 ℃ of liquid urea with 5~6m / s flow velocity, 8m 3 / h flow rate is pumped into the continuous channel with a pressure of 3.5Mpa, a temperature of 460°C and a flow rate of 700m 3 The drum kiln with superheated steam per hour produces crude cyanuric acid after the polymerization reaction of urea at 265°C. The crude cyanuric acid leaving the drum kiln is mixed with water to make a slurry with a water content of 65%, and then concentrated sulfuric acid is added to control the sulfuric acid. The mass concentration is 28-30%, and the reaction temperature is 110-120°C. After 8-12 hours of reaction, the temperature is lowered, centrifuged, washed, and dried to obtain cyanuric acid with a purity of 98.5-99%. The superheated steam adopts Superheated steam produced by-product in sulfuric acid production.

Embodiment 2

[0033] Embodiment 2: the temperature is 132 ℃ liquid urea with 5~6m / s flow velocity, 5m 3 / h flow pumped into the continuous channel with 3Mpa, 450°C, flow rate of 500m 3 / h superheated steam drum kiln, urea polymerizes at 250°C to produce crude cyanuric acid, the crude cyanuric acid out of the drum kiln is mixed with water to make a slurry with a moisture content of 65%, and then concentrated sulfuric acid is added to control the sulfuric acid The mass concentration is 28-30%, and the reaction temperature is 110-120°C. After 8-12 hours of reaction, the temperature is lowered, centrifuged, washed, and dried to obtain cyanuric acid with a purity of 98.5-99%. The superheated steam adopts Superheated steam produced by-product in sulfuric acid production.

Embodiment 3

[0034] Embodiment 3: the temperature is 138 ℃ of liquid urea with 5~6m / s flow velocity, 8m 3 / h flow pumped into the continuous channel with 4Mpa, 500°C, flow rate of 800m 3 / h of superheated steam drum kiln, urea polymerizes at 280°C to produce crude cyanuric acid, which is continuously transported to the crude product storage tank by a screw conveyor, and the crude product cyanuric acid that exits the drum kiln is prepared by adding water Add concentrated sulfuric acid after forming a slurry with a water content of 65%, control the mass concentration of sulfuric acid at 28-30%, and react at a reaction temperature of 110-120°C. After reacting for 8-12 hours, cool down, centrifuge, wash, and dry to obtain The cyanuric acid has a purity of 98.5-99%. The superheated steam is the by-product superheated steam in the production of sulfuric acid.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a production process of pyrolysis cyanuric acid, comprising: pumping liquid urea at 132-140 DEG C continuously at a flow speed of 5-6 m/s under 5-10 m<3>/h into a roller barrel into which superheated steam at a temperature of 50-500 DEG C under a pressure of 3-4 Mpa under 500-1000 m<3>/h is introduced, polymerizing urea at 250-280 DEG C to generate crude cyanuric acid, refining the crude cyanuric acid from the roller kiln, and then preparing cyanuric acid 98.5-99% in purity. Heat required for melting urea can be saved, energy consumption can be effectively reduced, high-temperature steam produced in byproduct acid production from sulfur is used to provide heat, the defects such as low heat utilization rate of hot air, high coal firing consumption and high post-treatment cost of pollutants are overcome, zero environmental pollution is caused, heat loss is low, material consumption is low, product quality is stable, and product yield is high; operating is facilitated, safety is high, an operating environment is good, labor intensity is low, carbon emission is reduced, environmental pollution is reduced, heat utilization is increased, and product quality is improved.

Description

technical field [0001] The invention relates to cyanuric acid, in particular to a cyanuric acid production process. Background technique [0002] Cyanuric acid (English name cyanuric acid) is also known as tricyanuric acid (tricyanic acid); 2,4,6-trihydroxy-1,3,5-triazine; 2,4,6 trihydroxy-s-triazine (2 , 4,6-triazinettriol); s-triazinetriol (sym-triazinetriol). The chemical formula is C3H3N3O3. Cyanuric acid can be used to synthesize chlorinated derivatives, salts, lipids; trichloroisocyanuric acid; sodium or potassium dichloroisocyanurate; can be used to synthesize cyanuric acid-formaldehyde resin, epoxy resin, antioxidant, coating, Paints, adhesives, pesticide herbicides, metal cyanide corrosion inhibitors, polymer material modifiers, etc.; can be used in the production of pharmaceutical halotrihydroxyzine; synthesize new bleaching agents; can be used in swimming pool chlorine stabilizers, sterilization, detoxification It can also be directly used as raw materials for ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C07D251/32
CPCC07D251/32
Inventor 王建伍董占良
Owner 王建伍
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap