FIELD: process engineering.
SUBSTANCE: invention relates to electrodialysis cleaning of water solution of glyoxal in electrodialysis apparatus with cation- and ion-exchange membranes. Proposed method comprises said solutions through set of electrodialysis cells, each containing three ion-exchange membranes. Said water solution of glyoxal is processed by dry NaOH to pH of 3 to 6.5, while electrodialysis is conducted using pulse current with pulse frequency of 50 to 103 Hz. One of ion-exchange membranes is composite and features relationship between areas of membrane ion- and cation-exchange parts varying from 1:1 to 6:1.
EFFECT: three- to fivefold decrease in power consumption, higher yield of target product.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PURIFYING GLYOXAL WATER SOLUTION | 2011 |
|
RU2510616C2 |
| METHOD OF SEPARATING AMINO ACIDS AND CARBOHYDRATES BY ELECTRODIALYSIS | 2009 |
|
RU2426584C2 |
| RECOVERY METHOD OF LITHIUM CHLORIDE, DIMETHYLACETAMIDE AND ISOBUTYL ALCOHOL OR LITHIUM CHLORIDE AND DIMETHYLACETAMIDE FROM PROCESS SOLUTIONS FOR PRODUCTION OF PARA-ARAMID FIBRES | 2014 |
|
RU2601459C2 |
| METHOD FOR MODIFYING AN ANION EXCHANGE MEMBRANE | 2022 |
|
RU2801038C1 |
| METHOD OF CLEANING AND CONCENTRATING CHLORINE COMPLEXES OF PLATINUM METALS BY ELECTROLYSIS METHOD | 2002 |
|
RU2226225C1 |
| METHOD FOR REGENERATION OF LITHIUM CHLORIDE, LITHIUM ALKALI, DIMETHYLACETAMIDE AND ISOBUTYL ALCOHOL OR LITHIUM CHLORIDE, LITHIUM ALKALI AND DIMETHYLACETAMIDE FROM PROCESS SOLUTIONS AND WASTEWATER FROM PRODUCTION OF PARA-ARAMID FIBRES | 2023 |
|
RU2807449C1 |
| METHOD OF TREATING WASTE WATER AND A SYSTEM FOR TREATMENT THEREOF, AS WELL AS A METHOD OF PRODUCING A MOLECULAR SIEVE AND A SYSTEM FOR PRODUCING IT | 2016 |
|
RU2730338C2 |
| METHOD OF OBTAINING GLYCOLIC ACID | 2013 |
|
RU2541790C1 |
| METHOD OF DESALTING OF WATER | 1998 |
|
RU2151743C1 |
| MULTICHAMBER ELECTRODIALYSIS APPARATUS FOR DEEP DEMINERALISATION | 2007 |
|
RU2380145C2 |
