US4246246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacture of hydrated borates
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1979-06-06
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Granted: 1981-01-20
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Expires: 1999-06-06
Abstract
Abstract The class of compounds represented by the generic formula, Ln2(BO2)2(CO3)2x5H2O wherein Ln stands for a rare-earth element, have never been known to the art. These novel compounds are produced by allowing Ln2(CO3)3.mH2O (wherein, m is a number not greater than 15) and boric acid, H3BO3, to react with each other at a molar ratio of 1:2 under a practically air-tight condition in a container, with the CO2 gas removed continuously as it is formed in the course of the reaction.
Inventors
- 👤 Sen-ichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:18
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/08; C01B35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A method for the manufacture of a hydrated carbonate-borate of the generic formula, Ln 2 (BO 2 ) 2 (CO 3 ) 2 .5H 2 O, which comprises charging an air-tightly sealable container with such amounts of Ln(CO 3 ) 3 .mH 2 O wherein Ln is at least one member selected from the group consisting of the rare-earth elements and m is a number not greater than 15, and H 3 BO 3 as to satisfy a molar ratio of 1:2, adding to the compounds water in such an amount as to correspond to 0 to 150% by weight based on the combined weight of the two compounds placed previously, keeping the contents of the container at temperatures in the range of from 30° to 100° C., giving the contents occasional agitation thereby expelling the formed CO 2 gas and maintaining the interior pressure of the container about one atmosphere and, after termination of the generation of CO 2 gas, removing the reaction mass from the container and thereafter drying the removed reaction mass.
Claim 2
Independent Claim
175 words
A method for the manufacture of a hydrated carbonate-borate of the generic formula, Ln 2 (BO 2 ) 2 (CO 3 ) 2 .5H 2 O, which comprises charging an air-tightly sealable container with such amounts of Ln(CO 3 ) 3 .mH 2 O wherein Ln is at least one member selected from the group consisting of the rare-earth elements and m is a number not greater than 15, and H 3 BO 3 as to satisfy a molar ratio of 1:2, adding to the compounds water in such an amount as to correspond to 0 to 150% by weight based on the combined weight of the two compounds placed previously, keeping the contents of the container at temperatures in the range of from 30° to 100° C., giving the contents occasional agitation thereby expelling the formed CO 2 gas and maintaining the interior pressure of the container about one atmosphere and, after termination of the generation of CO 2 gas, removing the reaction mass from the container and thereafter drying the removed reaction mass.
References Cited (Backward Citations)
DE2630914A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |