Technische Universiteit Delft

Niro Process Technology B.v.

Kemira Growhow Oyj

Johannes De Graauw

Geert-Jan Witkamp

Pieter Johannes Jansens

Gerda Maria Van Rosmalen

Harald Oosterhof

Maarten Jan Steenbakker

Zarko Olujic

Johannes Pieter Vrijenhoef

Arie De Rijke

Frank Van Der Ham

A heat integrated distillation column including a cylindrical shell having an upper and a lower end and at least one first inner volume and at least one second inner volume in the shell, and being in heat exchanging contact with each other through a wall separating the volumes. The heat integrated distillation column having the capacity to exchange heat through the wall from the first volume into the second volume, whereby the inside of the heat exchanging means is in open connection with the first volume.

Heat integrated distillation column

The invention is directed to a process for recovering a crystalline material from an aqueous solution, which solution also contains organic contaminants, in which process the material is crystallised from the aqueous solution by freeze crystallising at a eutectic freezing point of the solution.

Crystallisation of materials from aqueous solutions

An apparatus for separating solids from a suspension includes a hollow cylindrical column having a central axis therethrough. The column has an interior with a cross-section, perpendicular to said axis, that is constant along said axis, and that extends from a first end to a second end of the column; one central tube axially disposed in said column and extending from said one end toward said opposite end, said central tube having an outer wall of constant diameter, said cylindrical column and said central tube defining an annular zone between them, extending axially from said first end of the column to at least near said second end of the column; at least one filter in said outer wall of the said central tube, forming the only direct communication between the said annular zone and the interior of the tube and at least one filter in the outer wall.

Hydraulic annular washing column, and process for separating solids from a suspension

Process for the production of sodium carbonate anhydrate

Growing community of inventors

Zoetermeer, Netherlands

Johannes De Graauw