Clarifier process for producing sodium carbonate
US3981686A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1974 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Oct 24, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01D7/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method for clarifying a carbonate process solution containing suspended insolubles which solution is used in the preparation of crystals selected from the group consisting of sodium bicarbonate, sodium sesquicarbonate, anhydrous sodium carbonate, and sodium carbonate monohydrate, which comprises dispersing in the carbonate process solution prior to crystallization a cationic flocculating agent comprising a substituted guar gum containing one quaternary ammonium group per 2 to 12 monosaccharide units to agglomerate the suspended insolubles so the suspended insolubles will readily settle out of the carbonate process solution. This invention relates to a process for clarifying a carbonate process solution used in the preparation of sodium bicarbonate, sodium sesquicarbonate, anhydrous sodium carbonate or sodium carbonate monohydrate crystals. In Sweetwater and adjacent counties in the vicinity of Green River, Wyoming, in the Green River formation extending into Colorado and Utah, as well as in other locations, crude ore deposits in the form of trona (Na.sub.2 CO.sub.3.sup.. NaHCO.sub.3.sup.. 2H.sub.2 0), nahcolite (NaHCO.sub.3), thermonatrite (Na.sub.2 CO.sub.3.sup.. H.sub.2 0), and d…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.