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GB939216A
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Process for the production of alumina
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GB737904A
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Process for the electrolytic production of alumina
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US2728640A
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Construction of chemically resistant reaction towers
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GB722320A
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Improvements in the construction of chemically resistant reaction chambers or towers
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US2833707A
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Electrolytic production of alumina
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GB671403A
|
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Improvements in or relating to intensive processes for the manufacture of sulphuric acid
|
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GB647594A
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Process for the direct manufacture of concentrated nitric acid from the gases of the combustion of ammonia
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GB643394A
|
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Improvements in or relating to apparatus and a process for the manufacture of sulphuric acid
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GB637585A
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Process for the manufacture of oleum
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GB631334A
|
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Process for the manufacture of chromium salts and pure chromium
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US2356515A
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Methods for producing manganese in metal state and pure manganese dioxide, if desired, from manganese ores
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US2396570A
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Methods for purifying manganese in metal state
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