US3214243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the bithermal isotopic enrichment of ammonia with deuterium
Assignee: Houilleres du Bassin du Nord et du Pas de Calais
•
Filing: 1960-08-11
•
Granted: 1965-10-26
•
Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Lazard Bertrand
- 👤 Lerat Jean-Marie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:41
CPC Classifications
C; C01; C01B; C01B4/00; A; A61; A61K; A61K9/00; A61K9/48; A61K9/50; B; B01; B01D; B01D47/00; B01D59/00; B01D59/28; B01D59/32; B01J; B01J21/00; B01J21/02; B01J27/00; B01J27/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
203 words
A METHOD FOR THE BITHERMAL ISOTOPIC ENRICHMENT OF AMMONIA WITH DEUTERIUM WHICH COMPRISES ESTABLISHING A COUNTERCURRENT FLOW OF A GAS PHASE CONTAINING HYDROGEN AND A LIQUID AMMONIA PHASE CHARGED WITH AN ALKALI METAL AMIDE AS A NON-VOLATILE ADJUVANT IN A COUNTERCURRENT SYSTEM COMPRISING AT LEAST TWO STAGES; EFFECTING ISOTOPIC DEUTERIUM EXCHANGE BETWEEN SAID STREAMS IN A FIRST STAGE AND EXCHANGING HEAT BETWEEN THE GAS AND LIQUID STREAMS IN A SECOND STAGE WHILE SIMULTANEOUSLY SATURATING SAID HYDROGEN GAS STREAM WITH VAPORS OF AMMONIA WHEREIN SAID ADJUVANT AMMONIA STREAM IS CONTINUOUSLY CIRCULATING AND DIRECTLY CONTACTS IN A PORTION OF ITS CYCLE IN THE SECOND STAGE WHEN AT A TEMPERATURE OF ABOUT 30*C. SAID GAS STREAM AT A TEMPERATURE OF ABOUT -40*C. WHEREBY BY MEANS OF SAID 70*C. TEMPERATURE DIFFERENTIAL THERE IS AN EXCHANGE OF HEAT BETWEEN SAID STREAMS AND A SUFFICIENT PORTION OF SAID LIQUID AMMONIA IS VAPORIZED TO SATURATE SAID GAS THEREWITH AND TO INCREASE THE CONCENTRATION OF SAID ADJUVANT IN SAID LIQUID; ADDING TO SAID LIQUID PRIOR TO ITS DIRECT CONTACT WITH SAID GAS IN SAID SECOND CYCLE A QUANTITY OF LIQUID CONTAINING ADJUVANT IN A LOWER CONCENTRATION THAN IN SAID CIRCULATING LIQUID; AND WITHDRAWING A PORTION OF DEUTERIUM ENRICHED LIQUID CHARGED WITH
Claim 2
Independent Claim
203 words
A METHOD FOR THE BITHERMAL ISOTOPIC ENRICHMENT OF AMMONIA WITH DEUTERIUM WHICH COMPRISES ESTABLISHING A COUNTERCURRENT FLOW OF A GAS PHASE CONTAINING HYDROGEN AND A LIQUID AMMONIA PHASE CHARGED WITH AN ALKALI METAL AMIDE AS A NON-VOLATILE ADJUVANT IN A COUNTERCURRENT SYSTEM COMPRISING AT LEAST TWO STAGES; EFFECTING ISOTOPIC DEUTERIUM EXCHANGE BETWEEN SAID STREAMS IN A FIRST STAGE AND EXCHANGING HEAT BETWEEN THE GAS AND LIQUID STREAMS IN A SECOND STAGE WHILE SIMULTANEOUSLY SATURATING SAID HYDROGEN GAS STREAM WITH VAPORS OF AMMONIA WHEREIN SAID ADJUVANT AMMONIA STREAM IS CONTINUOUSLY CIRCULATING AND DIRECTLY CONTACTS IN A PORTION OF ITS CYCLE IN THE SECOND STAGE WHEN AT A TEMPERATURE OF ABOUT 30*C. SAID GAS STREAM AT A TEMPERATURE OF ABOUT -40*C. WHEREBY BY MEANS OF SAID 70*C. TEMPERATURE DIFFERENTIAL THERE IS AN EXCHANGE OF HEAT BETWEEN SAID STREAMS AND A SUFFICIENT PORTION OF SAID LIQUID AMMONIA IS VAPORIZED TO SATURATE SAID GAS THEREWITH AND TO INCREASE THE CONCENTRATION OF SAID ADJUVANT IN SAID LIQUID; ADDING TO SAID LIQUID PRIOR TO ITS DIRECT CONTACT WITH SAID GAS IN SAID SECOND CYCLE A QUANTITY OF LIQUID CONTAINING ADJUVANT IN A LOWER CONCENTRATION THAN IN SAID CIRCULATING LIQUID; AND WITHDRAWING A PORTION OF DEUTERIUM ENRICHED LIQUID CHARGED WITH
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |