MD202G2 - Method of active gamma-MnO2 preparing - Google Patents
Method of active gamma-MnO2 preparingInfo
- Publication number
- MD202G2 MD202G2 MD93-0035A MD930035A MD202G2 MD 202 G2 MD202 G2 MD 202G2 MD 930035 A MD930035 A MD 930035A MD 202 G2 MD202 G2 MD 202G2
- Authority
- MD
- Moldova
- Prior art keywords
- mno2
- active
- preparation
- alcaline
- acid
- Prior art date
Links
Abstract
The invention relates to the chemical industry, namely, to a process for active γ-MnO2 preparation and may be used as active electrochemical mass for dry primary-cell elements and batteries with acid and alcaline electrolytes.There is proposed a process for active γ-MnO2 preparation, comprising the thermic oxidation of ions Mn(II) in the form of carbonate with the unorganic oxidants, where as base ingredient for preparation of γ-MnO2 active form is used γ-MnCO3 at the density of 4,2 g/cm3 which is oxidized at 300-350°C under constant pressure 1,5-2 atm, during 20-60 min at further acidic hydrolisis in the 2NH2SO4 solution in the ratio of 1:2 (sediment:acid) and further washing with the deionized water up to pH 4,5-5,0 as the oxidant it is used the faintly acidated with H2SO4 0,5% solution 15% in the presence of air oxygen.The technical result consists in the fact, that the obtained γ-MnO2 active form compound is pure in comparation with the prototype, having:- purification grade of ≥98,5%- lowerer acidity index (pH sample) - 4,5-5,0- high density - 4,2 g/cm2.Moreover, the invention has the following advantages:- there are excluded the pollution sources with alcaline metals iones and chlorine aniones;- there is three times diminuated the quantity of γ-MnO2 preparation stages;- the electric and thermic energy consumption is 40% decreased.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MD93-0035A MD202G2 (en) | 1993-05-05 | 1993-05-05 | Method of active gamma-MnO2 preparing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MD93-0035A MD202G2 (en) | 1993-05-05 | 1993-05-05 | Method of active gamma-MnO2 preparing |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| MD930035A MD930035A (en) | 1994-11-30 |
| MD202F2 MD202F2 (en) | 1995-05-31 |
| MD202G2 true MD202G2 (en) | 1996-01-31 |
Family
ID=19738491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MD93-0035A MD202G2 (en) | 1993-05-05 | 1993-05-05 | Method of active gamma-MnO2 preparing |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD202G2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD1094Z (en) * | 2016-03-31 | 2017-06-30 | ОП ГОСУДАРСТВЕННЫЙ МЕДИЦИНСКИЙ И ФАРМАЦЕВТИЧЕСКИЙ УНИВЕРСИТЕТ им. НИКОЛАЯ ТЕСТЕМИЦАНУ РЕСПУБЛИКИ МОЛДОВА | Method for diagnosis of gastroesophageal reflux disease |
| MD1152Z (en) * | 2016-11-15 | 2018-01-31 | Государственный Медицинский И Фармацевтический Университет "Nicolae Testemitanu" Республики Молдова | Method for determining the degree of severity of gastroesophageal reflux disease |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2701104A (en) * | 1952-01-25 | 1955-02-01 | Reginald S Dean | Method of preparing manganese dioxide for the depolarization of dry cells |
| US2956860A (en) * | 1957-04-11 | 1960-10-18 | Manganese Chemicals Corp | Process for producing manganese dioxide |
| US3535217A (en) * | 1966-12-21 | 1970-10-20 | Matsushita Electric Ind Co Ltd | Process for electrolytic deposition of manganese dioxide |
-
1993
- 1993-05-05 MD MD93-0035A patent/MD202G2/en unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2701104A (en) * | 1952-01-25 | 1955-02-01 | Reginald S Dean | Method of preparing manganese dioxide for the depolarization of dry cells |
| US2956860A (en) * | 1957-04-11 | 1960-10-18 | Manganese Chemicals Corp | Process for producing manganese dioxide |
| US3535217A (en) * | 1966-12-21 | 1970-10-20 | Matsushita Electric Ind Co Ltd | Process for electrolytic deposition of manganese dioxide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD1094Z (en) * | 2016-03-31 | 2017-06-30 | ОП ГОСУДАРСТВЕННЫЙ МЕДИЦИНСКИЙ И ФАРМАЦЕВТИЧЕСКИЙ УНИВЕРСИТЕТ им. НИКОЛАЯ ТЕСТЕМИЦАНУ РЕСПУБЛИКИ МОЛДОВА | Method for diagnosis of gastroesophageal reflux disease |
| MD1152Z (en) * | 2016-11-15 | 2018-01-31 | Государственный Медицинский И Фармацевтический Университет "Nicolae Testemitanu" Республики Молдова | Method for determining the degree of severity of gastroesophageal reflux disease |
Also Published As
| Publication number | Publication date |
|---|---|
| MD202F2 (en) | 1995-05-31 |
| MD930035A (en) | 1994-11-30 |
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