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1972-01-25
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1959-12-22
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1963-12-31
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1964-12-15
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1964-05-05
Process for recovering melamine
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1964-10-20
Process for producing 3-amino-6-substituted and 5, 6-substituted 1, 2, 4-triazine compounds
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1962-10-09
Production of biuret
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1970-12-22
Process for separating acrylamide
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1990-03-06
Process for the production of aminoguanidine bicarbonate
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1976-10-05
Recovery of guanidine carbonate from aqueous solutions
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1986-09-09
Process for producing purified monoammonium phosphate from wet process phosphoric acid
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1972-02-22
Process for separating pure methionine from the hydrolysis product of its nitrile
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Process for producing and decomposing syngenite
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1986-09-09
Process for producing purified diammonium phosphate from wet process phosphoric acid
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1969-01-21
Purification of melamine solutions
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Recovery of cysteine
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Method of producing guanidine nitrate
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