NL21631C - - Google Patents
Info
- Publication number
- NL21631C NL21631C NL21631DA NL21631C NL 21631 C NL21631 C NL 21631C NL 21631D A NL21631D A NL 21631DA NL 21631 C NL21631 C NL 21631C
- Authority
- NL
- Netherlands
Links
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1790023X | 1924-12-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL21631C true NL21631C (en:Method) |
Family
ID=7743419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL21631D NL21631C (en:Method) | 1924-12-02 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1790023A (en:Method) |
| NL (1) | NL21631C (en:Method) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2528103A (en) * | 1946-01-07 | 1950-10-31 | Robert M Willson | Method of producing sulfuric acid and hydraulic cement from gypsum |
| US2644748A (en) * | 1946-11-04 | 1953-07-07 | Chempatents Inc | Sulfite waste treatment process |
-
0
- NL NL21631D patent/NL21631C/xx active
-
1925
- 1925-11-03 US US66640A patent/US1790023A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1790023A (en) | 1931-01-27 |