GB1469886A - Process for converting particulate sodium sesquicarbonate or carbonate to a product of lower bulk density comprising wegscheidrs salt -3na hco3, na2co3- - Google Patents
Process for converting particulate sodium sesquicarbonate or carbonate to a product of lower bulk density comprising wegscheidrs salt -3na hco3, na2co3-Info
- Publication number
- GB1469886A GB1469886A GB1918374A GB1918374A GB1469886A GB 1469886 A GB1469886 A GB 1469886A GB 1918374 A GB1918374 A GB 1918374A GB 1918374 A GB1918374 A GB 1918374A GB 1469886 A GB1469886 A GB 1469886A
- Authority
- GB
- United Kingdom
- Prior art keywords
- salt
- weight
- wegscheider
- particles
- carbonate monohydrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 150000003839 salts Chemical class 0.000 title abstract 9
- 229910000031 sodium sesquicarbonate Inorganic materials 0.000 title abstract 5
- 235000018341 sodium sesquicarbonate Nutrition 0.000 title abstract 5
- WCTAGTRAWPDFQO-UHFFFAOYSA-K trisodium;hydrogen carbonate;carbonate Chemical compound [Na+].[Na+].[Na+].OC([O-])=O.[O-]C([O-])=O WCTAGTRAWPDFQO-UHFFFAOYSA-K 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title 1
- 229910000029 sodium carbonate Inorganic materials 0.000 title 1
- 239000000203 mixture Substances 0.000 abstract 9
- 239000002245 particle Substances 0.000 abstract 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 5
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 abstract 4
- 229940076133 sodium carbonate monohydrate Drugs 0.000 abstract 4
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 abstract 3
- 239000007789 gas Substances 0.000 abstract 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract 2
- 239000011148 porous material Substances 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 229940071207 sesquicarbonate Drugs 0.000 abstract 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract 1
- 235000017557 sodium bicarbonate Nutrition 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/14—Preparation of sesquicarbonates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/35—Varying the content of water of crystallisation or the specific gravity
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Cosmetics (AREA)
Abstract
1469886 Treating sodium sesquicarbonate or sodium carbonate monohydrate ALLIED CHEMICAL CORP 1 May 1974 [2 May 1973(2)] 19183/74 Heading C1A Particles comprising sodium sesquicarbonate or sodium carbonate monohydrate are treated to produce particles of reduced bulk density in the form of randomly oriented microcrystalline needles comprising Wegscheider's Salt by heating the particles in a reaction zone at 70- 105‹ C. (70-100‹ C. for the carbonate monohydrate) in contact with a gas mixture containing 15-85% CO 2 , 15-85% H 2 O vapour (15- 70% for the carbonate monohydrate) and 0- 45% inert gas until the particles contain at least 10% Wegscheider's salt and continuing the reaction at 70-105‹ C. with net production of water until the particles contain at least 20% by weight of Wegscheider's salt and less than 12% of water. The pressure within the reaction zone is preferably between 12 and 25 lb./in.<SP>2</SP> absolute, the preferred conditions for the treatment of the carbonate monohydrate particles is a temperature of 85-95‹ C. and a mixture containing 40-65% vol. CO 2 and 20-40% vol. H 2 O vapour and for the sesquicarbonate is a temperature of 90-100‹ C. and a gas mixture containing 45-70% vol. CO 2 and 25-40% vol. H 2 O vapour. The reaction is preferably continued until the particles contain at least 50, preferably at least 85% by weight of Wegscheider's salt. A portion of the water produced in the reaction zone is preferably condensed by cooling and the resulting gas mixture may be recycled to the reaction zone. The process provides a composition in the form of granular particles of sodium carbonate monohydrate having therein randomly oriented micro-needles of Wegscheider's salt, the composition containing at least 20% by weight of the salt, the remainder being sodium carbonate monohydrate, sodium bicarbonate and/or sodium sesquicarbonate and having a bulk density of 12-35 lb./ft.<SP>3</SP>, a water content of less than 12% by weight and 0À15- 0À44 ml./g. of pores of up to 2 microns in diameter. Such a composition preferably contains at least 50% by weight and preferably more than 85% by weight of Wegscheider's salt. The process also provides a composition in the form of needles of sodium sesquicarbonate having randomly oriented micro-needles of Wegscheider's salt randomly distributed therein in amounts of more than 50% by weight preferably more than 85% by weight. This composition has a bulk density of 12-25 lb./ft.<SP>3</SP>, a water content of less than 7% by weight and 0À02 to 0À42 ml./g. of pores up to 2 microns in diameter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35655273A | 1973-05-02 | 1973-05-02 | |
| US05/356,663 US4115525A (en) | 1973-05-02 | 1973-05-02 | Absorptive low bulk density product from sodium sesquicarbonate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1469886A true GB1469886A (en) | 1977-04-06 |
Family
ID=26999263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1918374A Expired GB1469886A (en) | 1973-05-02 | 1974-05-01 | Process for converting particulate sodium sesquicarbonate or carbonate to a product of lower bulk density comprising wegscheidrs salt -3na hco3, na2co3- |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5027800A (en) |
| CA (1) | CA1033532A (en) |
| DE (1) | DE2420852A1 (en) |
| FR (1) | FR2228034B1 (en) |
| GB (1) | GB1469886A (en) |
| IT (1) | IT1014080B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2838800A1 (en) * | 1977-09-12 | 1979-03-22 | Colgate Palmolive Co | PHOSPHATE-FREE PARTICULAR DETERGENT WITH HIGH SHOE WEIGHT |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4151266A (en) * | 1978-06-22 | 1979-04-24 | Allied Chemical Corporation | Method for the conversion of anhydrous sodium carbonate to Wegscheider's Salt |
| US4285925A (en) * | 1978-08-16 | 1981-08-25 | Allied Chemical Corporation | Process for the conversion of light ash to absorptive low bulk density alkali products |
-
1974
- 1974-04-30 DE DE19742420852 patent/DE2420852A1/en active Pending
- 1974-05-01 CA CA198,640A patent/CA1033532A/en not_active Expired
- 1974-05-01 GB GB1918374A patent/GB1469886A/en not_active Expired
- 1974-05-02 JP JP4967074A patent/JPS5027800A/ja active Pending
- 1974-05-02 IT IT6836274A patent/IT1014080B/en active
- 1974-05-02 FR FR7415232A patent/FR2228034B1/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2838800A1 (en) * | 1977-09-12 | 1979-03-22 | Colgate Palmolive Co | PHOSPHATE-FREE PARTICULAR DETERGENT WITH HIGH SHOE WEIGHT |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1014080B (en) | 1977-04-20 |
| DE2420852A1 (en) | 1974-11-28 |
| FR2228034A1 (en) | 1974-11-29 |
| CA1033532A (en) | 1978-06-27 |
| FR2228034B1 (en) | 1979-02-16 |
| JPS5027800A (en) | 1975-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |