US2692276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of acrylonitrile
Assignee: BASF Schweiz AG
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Filing: 1951-07-19
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Granted: 1954-10-19
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Expires: 1971-07-19
Abstract
No abstract record available.
Inventors
- 👤 Goerg Alfred
- 👤 Grob Arwed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:25
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A PROCESS FOR THE ADDITIVE COMBINATION OF HYDROCYANIC ACID AND ACETYLENE, STARTING FROM A DILUTE GASEOUS HYDROCYANIC ACID WHICH CONTAINS LESS THAN 20% HCN, WHICH COMPRISES, IN A FIRST STAGE, CONCENTRATING THE SAID DILUTE GASEOUS HYDROCYANIC ACID BY BRINGING IT INTO CONTACT WITH AN AQUEOUS ACIDIC CUPROUS SALT CATALYST AT A TEMPERATURE BELOW ABOUT 60-65* C., WHEREBY THE DILUTE GASEOUS HYDROCYANIC ACID IS IN EFFECT CONCENTRATED BY ABSORPTION OF THE HCN BY THE SAID CATALYST WITH NO FORMATION OF ACRYLONITRILE, AND THEN, IN A SECOND STAGE, SYNTHESIZING ACRYLONITRILE BY BRINGING THE HCN-CHARGED CATALYST
Claim 2
Dependent Claim
93 words
A PROCESS FOR THE ADDITIVE COMBINATION OF HYDROCYANIC ACID AND ACETYLENE, STARTING FROM A DILUTE GASEOUS HYDROCYANIC ACID WHICH CONTAINS LESS THAN 20% HCN, WHICH COMPRISES, IN A FIRST STAGE, CONCENTRATING THE SAID DILUTE GASEOUS HYDROCYANIC ACID BY BRINGING IT INTO CONTACT WITH AN AQUEOUS ACIDIC CUPROUS SALT CATALYST AT A TEMPERATURE BELOW ABOUT 60-65* C., WHEREBY THE DILUTE GASEOUS HYDROCYANIC ACID IS IN EFFECT CONCENTRATED BY ABSORPTION OF THE HCN BY THE SAID CATALYST WITH NO FORMATION OF ACRYLONITRILE, AND THEN, IN A SECOND STAGE, SYNTHESIZING ACRYLONITRILE BY BRINGING THE HCN-CHARGED CATALYST
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) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |