Processing

Please wait...

Settings

Settings

Goto Application

1. WO2019055801 - TEMPORARILY MODIFYING THE PERMEABILITY OF AN ELECTROLYTE PERMEABLE DIAPHRAGM

Publication Number WO/2019/055801
Publication Date 21.03.2019
International Application No. PCT/US2018/051110
International Filing Date 14.09.2018
IPC
C25B 13/04 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
13Diaphragms; Spacing elements
04characterised by the material
C25B 15/02 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
15Operating or servicing of cells
02Process control or regulation
C25B 1/46 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
1Electrolytic production of inorganic compounds or non-metals
34Simultaneous production of alkali metal hydroxides and chlorine, its oxyacids or salts
46in diaphragm cells
C25B 13/02 2006.01
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS; APPARATUS THEREFOR
13Diaphragms; Spacing elements
02characterised by form or shape
CPC
C25B 1/46
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
1Electrolytic production of inorganic compounds or non-metals
34Simultaneous production of alkali metal hydroxides and chlorine, its oxyacids or salts
46in diaphragm cells
C25B 13/02
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
13Diaphragms; Spacing elements
02characterised by form or shape
C25B 13/08
CCHEMISTRY; METALLURGY
25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
BELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
13Diaphragms; Spacing elements
04characterised by the material
08based on organic materials
Applicants
  • DOW GLOBAL TECHNOLOGIES LLC [US]/[US]
Inventors
  • ZHOU, Jianqing
Agents
  • HUEBSCH, Joseph C.
Priority Data
62/558,91815.09.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) TEMPORARILY MODIFYING THE PERMEABILITY OF AN ELECTROLYTE PERMEABLE DIAPHRAGM
(FR) MODIFICATION TEMPORAIRE DE LA PERMÉABILITÉ D'UN DIAPHRAGME PERMÉABLE AUX 'ÉLECTROLYTES
Abstract
(EN)
A method of temporarily modifying a permeability of an electrolyte permeable diaphragm. The method includes installing the electrolyte permeable diaphragm in a chlor-alkali electrolytic cell. The electrolyte permeable diaphragm includes a foraminous structure, particulate material on the foraminous structure, and an alkali compound on the particulate material. Exposing the electrolyte permeable diaphragm to an aluminum-containing brine allows a precipitate of aluminum hydroxide to form on the particulate material. The presence of the aluminum hydroxide precipitate modifies the permeability of the electrolyte permeable diaphragm. Providing a flow of a production brine that does not include the aluminum chloride and energizing the chlor-alkali electrolytic cell causes the production of caustic in the cathode compartment, where the aluminum hydroxide is removed from the electrolyte permeable diaphragm as the electrolyte permeable diaphragm becomes alkaline when caustic is produced in the cathode compartment.
(FR)
L'invention concerne un procédé de modification temporaire de la perméabilité d'un diaphragme perméable aux électrolytes. Le procédé comprend l'installation du diaphragme perméable aux électrolytes dans une cellule électrolytique chlore-alcali. Le diaphragme perméable aux électrolytes comprend une structure perforée, un matériau particulaire sur la structure perforée, un composé alcalin sur le matériau particulaire. L'exposition du diaphragme perméable aux électrolytes à une saumure contenant de l'aluminium permet la formation d'un précipité d'hydroxyde d'aluminium sur le matériau particulaire. La présence du précipité d'hydroxyde d'aluminium modifie la perméabilité du diaphragme perméable aux électrolytes. La formation d'un écoulement d'une saumure produite qui ne comprend pas le chlorure d'aluminium et la stimulation de la cellule électrolytique chlore-alcali provoque la production de caustique dans le compartiment de cathode, l'hydroxyde d'aluminium étant retiré du diaphragme perméable aux électrolytes lorsque le diaphragme perméable aux électrolytes devient alcaline quand le caustique est produit dans le compartiment de cathode.
Latest bibliographic data on file with the International Bureau