PROCESS FOR PRODUCING FURFURAL, FORMIC ACID AND ACETIC ACID FROM SPENT PULP-COOKING LIQUOR

PROCESS FOR PRODUCING FURFURAL, FORMIC ACID AND ACETIC ACID FROM SPENT PULP-COOKING LIQUOR

THE INVENTION RELATES TO A PROCESS FOR PRODUCING FURFURAL, FOR FORMING FORMIC AND ACETIC ACIDS AND FOR RECOVERING FORMIC AND ACETIC ACIDS IN A PULP MAKING PROCESS, IN WHICH AN ACID MIXTURE CONTAINING MAINLY FORMIC AND ACETIC ACIDS IS USED AS A COOKING CHEMICAL. THE PROCESS OF THE INVENTION IS CHARAC...

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Hauptverfasser: JUHA ANTTILA, PASI ROUSU, ESA ROUSU, JUHA TANSKANEN
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
PAPER-MAKING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
SEPARATION
TEXTILES
TRANSPORTING
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creator JUHA ANTTILA
PASI ROUSU
ESA ROUSU
JUHA TANSKANEN
description THE INVENTION RELATES TO A PROCESS FOR PRODUCING FURFURAL, FOR FORMING FORMIC AND ACETIC ACIDS AND FOR RECOVERING FORMIC AND ACETIC ACIDS IN A PULP MAKING PROCESS, IN WHICH AN ACID MIXTURE CONTAINING MAINLY FORMIC AND ACETIC ACIDS IS USED AS A COOKING CHEMICAL. THE PROCESS OF THE INVENTION IS CHARACTERIZED BY UTILIZING REACTIVE EVAPORATION AND RECYCLING OF SPENT COOKING LIQUORS IN EVAPORATORS IN THE RECOVERING STAGE OF THE COOKING CHEMICALS. THUS IT IS POSSIBLE TO FORM EFFECTIVELY MORE FURFURAL, FORMIC ACID AND ACETIC ACID FROM THE DISSOLVED ORGANIC MATTER CONTAINED IN THE COOKING LIQUOR AND/OR CHEMICALLY BOUND ACIDS CONTAINED THEREIN.
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subjects APPARATUS THEREFOR
PAPER-MAKING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PRODUCTION OF CELLULOSE
PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCESFROM CELLULOSE-CONTAINING MATERIALS
REGENERATION OF PULPING LIQUORS
SEPARATION
TEXTILES
TRANSPORTING
title PROCESS FOR PRODUCING FURFURAL, FORMIC ACID AND ACETIC ACID FROM SPENT PULP-COOKING LIQUOR
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