CPC Main Group
C01D 7/00 Carbonates of sodium, potassium or alkali metals in general
13 direct subcodes
Child Classifications
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- C01D 7/02 Preparation by double decomposition
- C01D 7/06 Preparation via sodium or potassium magnesium carbonate
- C01D 7/07 Preparation from the hydroxides
- C01D 7/08 Preparation from or via cyano compounds of sodium or potassium (C01D1/26 takes precedence)
- C01D 7/10 Preparation of bicarbonates from carbonates (ammonia soda process C01D7/18)
- C01D 7/12 Preparation of carbonates from bicarbonates
- C01D 7/14 Preparation of sesquicarbonates
- C01D 7/16 Preparation from compounds of sodium or potassium with amines and carbon dioxide
- C01D 7/18 Preparation by the ammonia-soda process
- C01D 7/22 Purification
- C01D 7/35 Varying the content of water of crystallisation or the specific gravity
- C01D 7/38 Preparation in the form of granules, pieces or other shaped products
- C01D 7/42 Preventing the absorption of moisture or caking
Top Applicants
Top 10 applicants by patent filingsfor class C01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINESE ACADEMY OF SCIENCES 4,293
- LG CHEM KR 3,317
- BASF (BADISCHE ANILIN & SODA FABRIK) DE 2,219
- SINOPEC (CHINA PETROCHEMICAL CORPORATION) 2,154
- OMYA INTERNATIONAL CH 1,524
- PANASONIC INTELLECTUAL PROPERTY JP 1,362
- SAUDI ARABIAN OIL COMPANY SA 1,298
- SUMITOMO METAL MINING COMPANY JP 1,286
- CENTRAL SOUTH UNIVERSITY 1,243
- L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE FR 1,238