Classifications

• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B17/00—Sulfur; Compounds thereof
  • C01B17/48—Sulfur dioxide; Sulfurous acid
  • C01B17/50—Preparation of sulfur dioxide
  • C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
  • C01B17/506—Preparation of sulfur dioxide by reduction of sulfur compounds of calcium sulfates
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B7/00—Hydraulic cements
  • C04B7/02—Portland cement
  • C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Inorganic Chemistry (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=3877782

Family Applications (1)

Country Status (3)

Families Citing this family (1)

• 0
  • NL NL26321D patent/NL26321C/xx active
  • BE BE354788D patent/BE354788A/xx unknown
• 1929
  • 1929-09-21 FR FR682121D patent/FR682121A/fr not_active Expired

Also Published As

Similar Documents