US4459138A
(en )
1984-07-10
Recovery of alkali metal constituents from catalytic coal conversion residues
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(en )
2010-09-02
Process and apparatus for conversion of biomass
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(en )
1930-01-07
Manufacture of pulp and treatment of residual liquors, etc.
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(sr )
US1045723A
(en )
1912-11-26
Process of treating waste ferrous sulfate liquors.
US3993730A
(en )
1976-11-23
Purification of coke oven gas with production of sulfuric acid and ammonium sulfate
US1953225A
(en )
1934-04-03
Treatment of acid sludge
US1897031A
(en )
1933-02-14
Recovering iodine from natural waters and the like
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(en )
1933-07-11
Treatment of iron sulphide-bearing material
US5112592A
(en )
1992-05-12
Process for curing bicarbonates
US1843616A
(en )
1932-02-02
Method for regenerating granular active charcoal
US2858191A
(en )
1958-10-28
Production of gases rich in sulfur dioxide suitable for working up into sulfuric acid
US1196049A
(en )
1916-08-29
von rauschenplat
US2255445A
(en )
1941-09-09
Production of sulphuric acid and iron oxide from waste pickling acid
US1972883A
(en )
1934-09-11
Recovery of elemental sulphur
US291264A
(en )
1884-01-01
Johist addie and james addie
JPS6047201B2
(ja )
1985-10-21
アルカリ金属硫化物及び炭酸塩混合物の処理方法
US1269441A
(en )
1918-06-11
Method of treating waste pickle liquor.
US543284A
(en )
1895-07-23
Semfeldek
US2028713A
(en )
1936-01-21
Production of so from acid sludge
RU2113436C1
(ru )
1998-06-20
Способ производства фурфурола и уксусной кислоты
JPS594365B2
(ja )
1984-01-30
元素硫黄含有ガスの精製方法
US1864480A
(en )
1932-06-21
Recovery of sulphur
US1010221A
(en )
1911-11-28
Process of recovering sulfuric acid from acid sludge.
US335962A
(en )
1886-02-09
Eugeist schaal