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| CAS NO. | 123-77-3 |
| Alias | ADC |
| Molecular Formula | C2H4N4O2 |
| Appearance | Orange-red powder or crystals |
| ASSAY | 97%Min |
| Package | 25Kg/bag, 12MT/FCL, 24MT/FCL |
| PackingGroup | II |
| UN NO. | 3242 |
| HazardClass | 4.1 |
| Technical Data Sheet | |
| Appearance | Light Yellow Powder |
| Purity | ≥97% |
| Decomposition Temperature | 200℃-205℃ |
| Gas Evolution Value | 225ml/g±5ml/g |
| Heat Of Combustion | 1090(KJ/mol) |
| Solubility | Insoluble in Water,Benzene,Alcohol, Acetone |
| Average Particle Size | 12um-15um |
| Heating Loss | ≤0.15% |
| Ash | ≤0.04% |
| Water Contect | ≤0.1% |
| PH Value | 6.5-7.5 |
| Methods of production | ||||
| Industrial production of foaming agent AC, which is synthesized by condensation of hydrazine hydrate, urea, and sulfuric acid to form intermediate diurea, and then oxidized to obtain the finished product. 1. Dissolve urea in a 2% hydrazine hydrate solution through condensation and add it to the reaction pot. Add sulfuric acid under stirring to reach a pH of 1-2 in the feed solution, heat to turn the pH to 2-5, then slowly add sulfuric acid and maintain the pH at 2-5 for several hours before sampling and measuring the endpoint (titrating the hydrazine content with 0.1N iodine solution). The synthesized biurea is filtered out from the ammonium sulfate mother liquor and washed with hot water for use in the oxygenation process. 2. Oxidation: Dissolve the biuret in a reaction pot with water, add sodium bromide, and introduce chlorine gas. The reaction temperature is controlled at 30-50 ℃. The prepared azodicarbonamide is first washed with warm water to neutral, then centrifuged and dried before being Chemicalbook to obtain the finished product. The oxidation process has the greatest impact on the product quality and production cost of foaming agent AC. The early use of nitric acid and chromic acid methods has tended to be phased out due to cost and pollution reasons. The method of using chlorine bromide as an oxidant instead of chromium salt to oxidize biurea to produce foaming agent AC has greatly reduced product costs. Other methods include treating biuret with air and nitrogen dioxide, with a yield of 84.3%; Production of foaming agent AC by electrolysis; The method of oxidizing biurea with hydrogen peroxide is used. Raw material consumption quota: 1160kg/t hydrazine hydrate (40%), 1330kg/t urea (nitrogen content ≥ 46%), 800kg/t liquid chlorine, 2000kg/t caustic soda (30%), 1140kg/t sulfuric acid (98%). | ||||
| APPLICATION | |||
| Widely used for foaming of polyvinyl chloride, polyethylene, polypropylene, ABS resin, and rubber | |||
| CAS NO. | 123-77-3 |
| Alias | ADC |
| Molecular Formula | C2H4N4O2 |
| Appearance | Orange-red powder or crystals |
| ASSAY | 97%Min |
| Package | 25Kg/bag, 12MT/FCL, 24MT/FCL |
| PackingGroup | II |
| UN NO. | 3242 |
| HazardClass | 4.1 |
| Technical Data Sheet | |
| Appearance | Light Yellow Powder |
| Purity | ≥97% |
| Decomposition Temperature | 200℃-205℃ |
| Gas Evolution Value | 225ml/g±5ml/g |
| Heat Of Combustion | 1090(KJ/mol) |
| Solubility | Insoluble in Water,Benzene,Alcohol, Acetone |
| Average Particle Size | 12um-15um |
| Heating Loss | ≤0.15% |
| Ash | ≤0.04% |
| Water Contect | ≤0.1% |
| PH Value | 6.5-7.5 |
| Methods of production | ||||
| Industrial production of foaming agent AC, which is synthesized by condensation of hydrazine hydrate, urea, and sulfuric acid to form intermediate diurea, and then oxidized to obtain the finished product. 1. Dissolve urea in a 2% hydrazine hydrate solution through condensation and add it to the reaction pot. Add sulfuric acid under stirring to reach a pH of 1-2 in the feed solution, heat to turn the pH to 2-5, then slowly add sulfuric acid and maintain the pH at 2-5 for several hours before sampling and measuring the endpoint (titrating the hydrazine content with 0.1N iodine solution). The synthesized biurea is filtered out from the ammonium sulfate mother liquor and washed with hot water for use in the oxygenation process. 2. Oxidation: Dissolve the biuret in a reaction pot with water, add sodium bromide, and introduce chlorine gas. The reaction temperature is controlled at 30-50 ℃. The prepared azodicarbonamide is first washed with warm water to neutral, then centrifuged and dried before being Chemicalbook to obtain the finished product. The oxidation process has the greatest impact on the product quality and production cost of foaming agent AC. The early use of nitric acid and chromic acid methods has tended to be phased out due to cost and pollution reasons. The method of using chlorine bromide as an oxidant instead of chromium salt to oxidize biurea to produce foaming agent AC has greatly reduced product costs. Other methods include treating biuret with air and nitrogen dioxide, with a yield of 84.3%; Production of foaming agent AC by electrolysis; The method of oxidizing biurea with hydrogen peroxide is used. Raw material consumption quota: 1160kg/t hydrazine hydrate (40%), 1330kg/t urea (nitrogen content ≥ 46%), 800kg/t liquid chlorine, 2000kg/t caustic soda (30%), 1140kg/t sulfuric acid (98%). | ||||
| APPLICATION | |||
| Widely used for foaming of polyvinyl chloride, polyethylene, polypropylene, ABS resin, and rubber | |||
