Patent US2803521A successfully refreshed from Google Patents.
US2803521A
Expired / Lapsed
US
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Method of treating spent metallic reaction masses from the direct process production of organohalosilanes
Assignee: Wacker Chemie AG
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Filing: 1953-02-19
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Granted: 1957-08-20
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Expires: 1973-02-19
Abstract
No abstract record available.
Inventors
- 👤 Nitzsche Siegfried Karl
- 👤 Schmidt Erich Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:25
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02; C01G; C01G3/00; C01G3/04; C01G3/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF SEPARATING SILICONAND COPPER FROM THE SPENT METALLIC REACTION MASS OBTAINED FROM THE DIRECT PROCESS REACTION OF A HALOHYDROCARBON WITH SILICON IN THEE PRESENCE OF A COPPER CATALYST FOR THE REACTION, WHICH COMPRISES DISPERSING THE SPENT MASS IN WATER, CONTACTING THE DISPERSED MASS WITH CHLORINE AT A TEMPERATURE OF 20-100* C. UNTIL SUBSTANTIALLY ALL OF THE COPPER IS CONVERTED TO CUPRIC CHLORIDE, SEPARATING THE RELATIVELY PURE SILICON FROM THE SUPERNATANT SOLUTION OF SOLUBLE METAL CHLORIDES, REDUCING THE CUPRIC CHLORIDE PRESENT IN THE ACIDIC SUPERNATANT SOLUTION TO CUPROUS CHLORIDE, NEUTRALIZING THE RESULTING SOLUTION OF CUPROUS CHLORIDE, AND SEPARATING THE RESULTING PRECIPITATED CUPROUS CHLORIDE.
Claim 2
Independent Claim
104 words
THE METHOD OF SEPARATING SILICONAND COPPER FROM THE SPENT METALLIC REACTION MASS OBTAINED FROM THE DIRECT PROCESS REACTION OF A HALOHYDROCARBON WITH SILICON IN THEE PRESENCE OF A COPPER CATALYST FOR THE REACTION, WHICH COMPRISES DISPERSING THE SPENT MASS IN WATER, CONTACTING THE DISPERSED MASS WITH CHLORINE AT A TEMPERATURE OF 20-100* C. UNTIL SUBSTANTIALLY ALL OF THE COPPER IS CONVERTED TO CUPRIC CHLORIDE, SEPARATING THE RELATIVELY PURE SILICON FROM THE SUPERNATANT SOLUTION OF SOLUBLE METAL CHLORIDES, REDUCING THE CUPRIC CHLORIDE PRESENT IN THE ACIDIC SUPERNATANT SOLUTION TO CUPROUS CHLORIDE, NEUTRALIZING THE RESULTING SOLUTION OF CUPROUS CHLORIDE, AND SEPARATING THE RESULTING PRECIPITATED CUPROUS CHLORIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |