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C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
C01B17/00—Sulfur; Compounds thereof
C01B17/69—Sulfur trioxide; Sulfuric acid
C01B17/90—Separation; Purification
C01B17/92—Recovery from acid tar or the like, e.g. alkylation acids
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FR42166D1932-07-301932-07-30Procédé pour régénérer les acides résiduaires provenant du raffinage des huiles minérales, des huiles de goudron, etc.
ExpiredFR42166E
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