PURIFICATION OF MELAMINE
PURPOSE: To provide a method for purifying melamine capable of reducing an acidic impurity contained in melamine by extraction with a small amount of water without making the crystal particle diameter of melamine, especially melamine by a dry method so large and obtaining an excellent result in a qu...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
17.12.1996
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| Edition | 6 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | PURPOSE: To provide a method for purifying melamine capable of reducing an acidic impurity contained in melamine by extraction with a small amount of water without making the crystal particle diameter of melamine, especially melamine by a dry method so large and obtaining an excellent result in a quality test by resinification rate at a low cost. CONSTITUTION: Melamine in an amount of 1.5-10 times a saturated dissolved amount of melamine at 80-150 deg.C, especially obtained by a dry method is mixed with water and adjusted to pH7 to 12 to give a melamine slurry. The slurry is heated to 80-150 deg.C while stirring, cooled to <=80 deg.C, crystallized melamine is filtered and dried. The heating and the cooling may be repeated as required. |
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| AbstractList | PURPOSE: To provide a method for purifying melamine capable of reducing an acidic impurity contained in melamine by extraction with a small amount of water without making the crystal particle diameter of melamine, especially melamine by a dry method so large and obtaining an excellent result in a quality test by resinification rate at a low cost. CONSTITUTION: Melamine in an amount of 1.5-10 times a saturated dissolved amount of melamine at 80-150 deg.C, especially obtained by a dry method is mixed with water and adjusted to pH7 to 12 to give a melamine slurry. The slurry is heated to 80-150 deg.C while stirring, cooled to <=80 deg.C, crystallized melamine is filtered and dried. The heating and the cooling may be repeated as required. |
| Author | ISHIDA KAZUNARI KAWANO YURI |
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| Notes | Application Number: JP19950143040 |
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| RelatedCompanies | MITSUI TOATSU CHEM INC |
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| Snippet | PURPOSE: To provide a method for purifying melamine capable of reducing an acidic impurity contained in melamine by extraction with a small amount of water... |
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| Title | PURIFICATION OF MELAMINE |
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