SU509535A1 - Method of boric acid purification - Google Patents
Method of boric acid purification Download PDFInfo
- Publication number
- SU509535A1 SU509535A1 SU742014490A SU2014490A SU509535A1 SU 509535 A1 SU509535 A1 SU 509535A1 SU 742014490 A SU742014490 A SU 742014490A SU 2014490 A SU2014490 A SU 2014490A SU 509535 A1 SU509535 A1 SU 509535A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- boric acid
- acid purification
- electrolyzer
- purification
- electrochemical
- Prior art date
Links
Description
Изобретение относитс к электрохимической очистке борной кислоты.. Известен электрохимический способ очистки борной кислоты путем электродигшиза в трехкамерном электродиализаторе , средн камера которого запол онена смешанным слоем анионита и катионита . Недостатком известного способа вл етс возможность очистки водного раствора борной кислоты только низкой кoнlJeJ тpaции - около 4%. С целью возможности очистки 2030%-ного водного раствора борной кислоты предложен способ, по которому электрохимическую обработку борной кислоты ведут в бездиафрагменном элек тролизере при температуре 50-70°С и при ПJJOтнocти тока 0,12-0,15 . Графитовые катоды могут быть выполнены из спектрально чистого графита , могут работатьбез замены до 50 ч в указанныхуслови х. После этого срЪка производитс активаци катодов путем кратковременного погруже:ни их в 10%-ный раствор азотной кис .лоты с последующей промывкой в дистиллированной воде. Пример. В электролизер из кв цевого стекла загружают 50 мл 20%-ного раствора борной кислоты квалификации медицинска . Электролиз провод т при силе тока 50 мА и напр жении 50 В. Электролиз заканчиваетс через 30 мин. Количество примесей в борной кислоте до очистки и после нее приведены в таблице. Таким образом, предлагаемый способ позвол ет очищать водные растворы борной кислоты высокой концентрации (20-30%) до содержани примесей в очи-щенном продукте .The invention relates to the electrochemical purification of boric acid. A known electrochemical method for the purification of boric acid by electrodigrating in a three-chamber electrodialyzer, the middle chamber of which is filled with a mixed layer of anion exchanger and cation exchanger. The disadvantage of this method is the possibility of purification of an aqueous solution of boric acid with only a low concentration of tribration - about 4%. For the purpose of the possibility of purification of a 2030% aqueous solution of boric acid, a method has been proposed by which electrochemical treatment of boric acid is carried out in a diaphragm electrolyzer at a temperature of 50-70 ° C and at a current of 0.12-0.15. Graphite cathodes can be made of spectrally pure graphite, can work without replacement for up to 50 hours in the specified conditions. After this termination, the cathodes are activated by brief immersion: neither of them in a 10% solution of nitric acid, followed by washing in distilled water. Example. 50 ml of a 20% aqueous solution of boric acid of medical qualification are loaded into a square glass electrolyzer. The electrolysis is carried out at a current of 50 mA and a voltage of 50 V. The electrolysis is completed after 30 minutes. The amount of impurities in boric acid before and after cleaning is given in the table. Thus, the proposed method allows purifying aqueous solutions of boric acid of a high concentration (20-30%) to the impurity content in the purified product.
.4.four
N;N;
Си FeSi Fe
10ten
,-7, -7
10ten
105095354105095354
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU742014490A SU509535A1 (en) | 1974-03-12 | 1974-03-12 | Method of boric acid purification |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU742014490A SU509535A1 (en) | 1974-03-12 | 1974-03-12 | Method of boric acid purification |
Publications (1)
Publication Number | Publication Date |
---|---|
SU509535A1 true SU509535A1 (en) | 1980-08-15 |
Family
ID=20581476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU742014490A SU509535A1 (en) | 1974-03-12 | 1974-03-12 | Method of boric acid purification |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU509535A1 (en) |
-
1974
- 1974-03-12 SU SU742014490A patent/SU509535A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FI91978C (en) | Continuous process for the preparation of crystalline sodium perchlorate | |
SU509535A1 (en) | Method of boric acid purification | |
GB1378475A (en) | Electrolytic treatment of emulsified wastes | |
SU467511A3 (en) | Electrolysis method | |
US4048044A (en) | Water-purifying apparatus | |
US3381027A (en) | Preparation and recovery of methyl 2-ketogluconate | |
SU1089174A1 (en) | Process for preparing potassium peroxodiphosphate | |
US1256758A (en) | Process of refining sugar. | |
SU423884A1 (en) | ||
SU631535A1 (en) | Method of purifying sugar-containing solution | |
SU393907A1 (en) | The method of purification of radioactive limiting alcohols from impurities containing s-14 | |
SU1583361A1 (en) | Method of purifying waste water from leukanol | |
GB532882A (en) | Improvements in or relating to the purification of electrolyte solutions and the preparation of pure salts therefrom | |
SU552290A1 (en) | The method of purification of sulfuric acid from organic impurities | |
GB1337457A (en) | Process for the preparation of saligenol by electrochemical reduction | |
SU424810A1 (en) | METHOD OF CLEANING CHLORIC ACID | |
SU413756A1 (en) | ELECTROCHEMICAL METHOD OF OBTAINING | Iodine sodium1 | |
SU401747A1 (en) | METHOD OF AMALHAM REFINING OF MERCURY IN A FOUR-SECTIONAL ELECTROLYSERATOR | |
RU2186114C1 (en) | Method for obtaining milk of lime for purifying sugar-containing solutions | |
SU1475953A1 (en) | Method of recovering metal from spent nitric-acid etching solutions | |
SU545699A1 (en) | Perchloric acid production method | |
SU839095A1 (en) | Method of extracting rhenium | |
GB1411371A (en) | Electrolytic reduction of oxalic acid to glyxylic acid | |
SU150825A1 (en) | Electrolyzer for high purity alkali | |
RU2154126C1 (en) | Method of preparing peroxomonosilicic acid |