Production of crystalline dextrose monohydrate

Abstract

Abstract A PROCESS FOR THE PRODUCTION OF CRYSTALLINE DEXTROSE MONOHYDRATE, WHEREIN A DEXTOSE MASS WHICH INITIALLY COMPRISES MAINLY A CONCENTRATED DEXTROSE SOLUTION IS CONTINUOUSLY PASSED IN PRO FLOW THROUGH AN ELONGATED HORIZONTAL CRYSTALLIZATION ZONE TO EFFECT CRYSTAL FORMATION AND THEN THROUGH AN AGEING ZONE TO EFFECT CRYSTAL GROWTH, WHEREUPON THE DEXTROSE MASS IS SEPARATED INTO CRYSTALS AND MOTHER LIQUOR AND THE MOTHER LIQUOR IS CONCENTRATED AND SUBJECTED AGAIN TO CRYSTALLIZATION AND AGEING. A VACUUM IS CREATED ABOVE THE DEXTROSE MASS FLOWING THROUGH THE CRYSTALLIZATION ZONE SO AS TO CAUSE A TEMPERATURE FALL THEREIN BY SELF-EVAPORATION AND TO EFFECT CRYSTAL FORMATION. AT THE SAME TIME, THE MASS IN THE CRYSTALLIZATION ZONE IS STIRRED IN PLANES PERPENDICULAR TO ITS DIRECTION OF FLOW AND SUBSTANTIALLY NO HEAT IS SUPLIED FROM THE OUTSIDE. CRYSTAL GROWTH WITHIN THE AGEING ZONE IS EFFECTED AT CONSTANT TEMPERATURE AND ATMOSPHERIC PRESSURE. THE CONCENTRATED MOTHER LIQUOR MAY BE WORKED UP BY BLENDING PART OF IT WITH INITIAL DEXTROSE SOLUTION AND RECYCLING IT TO THE BEGINNING OF THE PROCESS OR BY SUBJECTING AT LEAST PART OF IT TO A SECOND CYCLE OF OPERATIONS COMPRISING PASSING THE CONCENTRATED MOTHER LIQUOR THROUGH A SECOND CRYSTALLIZATION ZONE AND A SECOND AGEING ZONE AND SEPARATING THE RESULTING MASS INTO A SECOND PORTION OF CRYSTALS AND A SECOND MOTHER LIQUOR. THE SECOND PORTION OF CRYSTALS MAY BE COMBINED WITH CRYSTALS RESULTING FROM THE FIRST CYCLE OF OPERATIONS OR RECOVERED SEPARATELY OR BLENDED WITH AN INITIAL DEXTROSE SOLUTION AND RECYCLED TO THE BEGINNING OF THE PROCESS.

Inventors

• 👤 W Kingma

Bibliographic Details