Patent · US Active

Process for controlling a hydraulic wash column

US7637965B2 · kind B2 · utility

0Cited by

6References

8Claims

0Family size

Assignee

BASF SE

Inventors

Joerg Heilek · Bammental, DE
Klaus Joachim Mueller-Engel · Blankenloch, DE
Ulrich Hammon · Mannheim, DE
Thomas Walter · Dallas, US

Key dates

Filing date	Apr 10, 2006
Grant date	Dec 29, 2009
Priority date	—
Expiry date	Dec 14, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C51/48
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A process for operating a hydraulic wash column, in which the position of the buildup front in the wash column is positioned by means of the flow rates of control liquor conducted into the wash column and/or by means of the flow rate of the suspension conducted into the wash column, and the flow rate determination is with the aid of the pressure difference which exists in the column between points in the suspension zone disposed upstream of the buildup front and points in the zone projecting from the buildup front up to the end of the crystal bed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.