PROCESS FOR PRODUCING A NAPHTAHLENESULFONATE FORMALDEHYDE CONDENSATE

THE INVENTION PROVIDES A PROCESS CAPABLE OF EASILY PRODUCING A WATER-SOLUBLE SALT OF A NAPHTHALENESULFONATE FORMALDEHYDE CONDENSATE WITH A REDUCED AMOUNT OF UNREACTED FORMALDEHYDE. WHEN NAPHTHALENESULFONIC ACID IS SUBJECTED TO CONDENSATION REACTION WITH FORMALDEHYDE TO PRODUCE A NAPHTHALENESULFONATE...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIO YAMATO, SHUICHI FUJITA
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Zusammenfassung:	THE INVENTION PROVIDES A PROCESS CAPABLE OF EASILY PRODUCING A WATER-SOLUBLE SALT OF A NAPHTHALENESULFONATE FORMALDEHYDE CONDENSATE WITH A REDUCED AMOUNT OF UNREACTED FORMALDEHYDE. WHEN NAPHTHALENESULFONIC ACID IS SUBJECTED TO CONDENSATION REACTION WITH FORMALDEHYDE TO PRODUCE A NAPHTHALENESULFONATE FORMALDEHYDE CONDENSATE, A SULFITE IS ADDED TO THE REACTION SYSTEM AFTER THE CONCLUSION OF THE CONDENSATION REACTION. WHEN A CEMENT DISPERSANT COMPOSITION IS OBTAINED, THE PROCESS INCLUDES A STEP OF NEUTRALIZING THE CONDENSATE.