TREATMENT OF PAPER COATING WASTES CONTAINING STARCH AND PIGMENT

The separation of starch-containing coated paper broke or coating waste material into reusable pigment and fiber constituents together with an effluent which is subject to disposal in a manner to minimize or eliminate pollution problems. The pigment is recoverable from the coating composition waste...

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Bibliographische Detailangaben
1. Verfasser:	JOHN WALLACE DE VOS
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS THEREFOR CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PAPER-MAKING PRODUCTION OF CELLULOSE PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS REGENERATION OF PULPING LIQUORS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TEXTILES TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	The separation of starch-containing coated paper broke or coating waste material into reusable pigment and fiber constituents together with an effluent which is subject to disposal in a manner to minimize or eliminate pollution problems. The pigment is recoverable from the coating composition waste material or coated paper broke aqueous suspension by utilizing the starch in sol form to maintain the pigment dispersed while effecting removal of other constituents, in the case of broke removal of fiber fines, for example. Subsequently, the starch is hydrolyzed and the dispersion treated to provide for pigment sedimentation and removal. The procedure is particularly beneficial in that there need be no effluent of the process which is not readily disposable by conventional means and without contamination or pollution of streams which may receive the final effluent.