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DE912017C
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Process for the production of phenol-aldehyde resins
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DE760924C
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Process for the production of hydrocyanic acid
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DE745405C
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Process for the preparation of esters
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DE891020C
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Process for the production of synthetic resins
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DE735278C
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Method of washing benzene
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DE881507C
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Process for the production of urea
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DE742499C
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Production of activated carbon from the caustic soda or sulphate pulp liquor that occurs during pulp manufacture
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DE881506C
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Process for the production of urea
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DE758587C
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Process for the production of urea
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DE746346C
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Extraction of pitch coke for the manufacture of electrodes
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DE875848C
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Process for wet gas desulphurisation with simultaneous production of hydrogen sulphide-free ammonia
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DE868894C
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Process for the removal of hydrogen sulfide from carbonic acid and ammonia water containing hydrogen sulfide
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DE767432C
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Process for the preparation of a mixture of aliphatic amines
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DE742924C
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Process for the production of hard coal briquettes
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DE726507C
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Method and device for the production of coarse-grained ammonium bicarbonate
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DE713570C
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Increasing the electrolytic conductivity of solid electrolyte conductors for fuel chains
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DE744187C
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Process for the oxidative degradation of solid, carbon-containing substances such as lignite, peat and similar substances
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DE721000C
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Process for the oxidative degradation of essentially solid carbon-containing substances
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DE747003C
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Procedure for pH measurement of reducing liquids using an antimony electrode
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DE686691C
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