DK0583637T3 - Process for Preparation of Isocyanates by Decomposition of N, N, N-Trisubstituted Urea - Google Patents
Process for Preparation of Isocyanates by Decomposition of N, N, N-Trisubstituted UreaInfo
- Publication number
- DK0583637T3 DK0583637T3 DK93111624.8T DK93111624T DK0583637T3 DK 0583637 T3 DK0583637 T3 DK 0583637T3 DK 93111624 T DK93111624 T DK 93111624T DK 0583637 T3 DK0583637 T3 DK 0583637T3
- Authority
- DK
- Denmark
- Prior art keywords
- isocyanate
- formula
- isocyanates
- preparation
- boiling point
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/06—Preparation of derivatives of isocyanic acid from or via ureas
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Medicinal Preparation (AREA)
- Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
Abstract
Process for the preparation of isocyanates, which is characterised in that N,N,N'-trisubstituted ureas of the formula <IMAGE> in which R1, R2 and R3 are identical or different and denote a straight-chain, branched or cyclic (C1-C24) alkyl radical which is unsubstituted or substituted by (C1-C6) alkoxy, optionally substituted phenyl, halogen or by other radicals which are inert under the reaction conditions used, or R2 and R3 together denote a heterocyclic non-aromatic ring which can optionally also contain further heteroatoms, are decomposed at elevated temperature in a diluent which is inert under the reaction conditions to a readily volatile isocyanate of the formula R1NCO and a poorly volatile secondary amine of the formula R2R3NH whose boiling point lies above the boiling point of the isocyanate and above the reaction temperature used, after which the isocyanate is stripped off at the top by means of a carrier gas stream.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0163192A AT398762B (en) | 1992-08-13 | 1992-08-13 | METHOD FOR PRODUCING ISOCYANATES BY THE DECOMPOSITION OF N, N, N'-TRISUBSTITUTED UREAS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK0583637T3 true DK0583637T3 (en) | 1997-04-21 |
Family
ID=3517594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK93111624.8T DK0583637T3 (en) | 1992-08-13 | 1993-07-21 | Process for Preparation of Isocyanates by Decomposition of N, N, N-Trisubstituted Urea |
Country Status (20)
| Country | Link |
|---|---|
| EP (1) | EP0583637B1 (en) |
| JP (1) | JPH06157449A (en) |
| KR (1) | KR940003929A (en) |
| CN (1) | CN1085209A (en) |
| AT (2) | AT398762B (en) |
| AU (1) | AU4427093A (en) |
| CA (1) | CA2100718A1 (en) |
| CZ (1) | CZ166593A3 (en) |
| DE (1) | DE59305711D1 (en) |
| DK (1) | DK0583637T3 (en) |
| ES (1) | ES2097949T3 (en) |
| GR (1) | GR3022795T3 (en) |
| HU (1) | HU214218B (en) |
| MX (1) | MX9304898A (en) |
| NO (1) | NO932691L (en) |
| PL (1) | PL300037A1 (en) |
| SI (1) | SI9300427A (en) |
| SK (1) | SK71693A3 (en) |
| TW (1) | TW225517B (en) |
| ZA (1) | ZA935235B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2377847A1 (en) * | 2010-04-14 | 2011-10-19 | 3M Innovative Properties Company | Process for producing isocyanates |
| JP5165815B2 (en) * | 2011-06-24 | 2013-03-21 | 昭和電工株式会社 | Process for producing ethylenically unsaturated group-containing isocyanate compound |
| KR101490202B1 (en) * | 2013-04-10 | 2015-02-05 | 광주과학기술원 | Microporous carbon dioxide adsorbents and method for manufacturing the same |
| CN108299294A (en) * | 2017-01-11 | 2018-07-20 | 江苏恒瑞医药股份有限公司 | A kind of pleasure is cut down for the preparation method of Buddhist nun's impurity |
| FR3068257B1 (en) * | 2017-06-29 | 2022-01-14 | Commissariat Energie Atomique | CARBAMIDES FOR THE SEPARATION OF URANIUM(VI) AND PLUTONIUM(IV) WITHOUT PLUTONIUM(IV) REDUCTION |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH228816A (en) * | 1940-11-19 | 1943-09-15 | Ig Farbenindustrie Ag | Process for the preparation of i-hexyl isocyanate. |
| FR1473821A (en) * | 1963-07-05 | 1967-03-24 | Carbochimique Et Inst Francais | New isocyanic ester manufacturing processes |
| US3936484A (en) * | 1974-09-25 | 1976-02-03 | Atlantic Richfield Company | Production of isocyanates from substituted ureas |
| US4141913A (en) * | 1978-01-23 | 1979-02-27 | American Carbonyl, Inc. | Method of generating lower alkyl and cycloalkyl isocyanates |
-
1992
- 1992-08-13 AT AT0163192A patent/AT398762B/en not_active IP Right Cessation
-
1993
- 1993-07-08 SK SK716-93A patent/SK71693A3/en unknown
- 1993-07-16 CA CA002100718A patent/CA2100718A1/en not_active Abandoned
- 1993-07-20 ZA ZA935235A patent/ZA935235B/en unknown
- 1993-07-21 DE DE59305711T patent/DE59305711D1/en not_active Expired - Fee Related
- 1993-07-21 ES ES93111624T patent/ES2097949T3/en not_active Expired - Lifetime
- 1993-07-21 EP EP93111624A patent/EP0583637B1/en not_active Expired - Lifetime
- 1993-07-21 DK DK93111624.8T patent/DK0583637T3/en active
- 1993-07-21 AT AT93111624T patent/ATE150010T1/en not_active IP Right Cessation
- 1993-07-23 TW TW082105877A patent/TW225517B/zh active
- 1993-07-26 NO NO932691A patent/NO932691L/en unknown
- 1993-07-28 AU AU44270/93A patent/AU4427093A/en not_active Abandoned
- 1993-08-11 PL PL93300037A patent/PL300037A1/en unknown
- 1993-08-12 MX MX9304898A patent/MX9304898A/en unknown
- 1993-08-12 CN CN93116231A patent/CN1085209A/en active Pending
- 1993-08-12 JP JP5200824A patent/JPH06157449A/en not_active Withdrawn
- 1993-08-12 HU HU9302338A patent/HU214218B/en not_active IP Right Cessation
- 1993-08-12 KR KR1019930015595A patent/KR940003929A/en not_active Application Discontinuation
- 1993-08-13 CZ CZ931665A patent/CZ166593A3/en unknown
- 1993-08-13 SI SI9300427A patent/SI9300427A/en unknown
-
1997
- 1997-03-13 GR GR960403090T patent/GR3022795T3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06157449A (en) | 1994-06-03 |
| CN1085209A (en) | 1994-04-13 |
| ATE150010T1 (en) | 1997-03-15 |
| EP0583637B1 (en) | 1997-03-12 |
| SI9300427A (en) | 1994-03-31 |
| DE59305711D1 (en) | 1997-04-17 |
| CZ166593A3 (en) | 1994-03-16 |
| NO932691D0 (en) | 1993-07-26 |
| GR3022795T3 (en) | 1997-06-30 |
| HU9302338D0 (en) | 1993-11-29 |
| AU4427093A (en) | 1994-02-17 |
| AT398762B (en) | 1995-01-25 |
| KR940003929A (en) | 1994-03-14 |
| EP0583637A1 (en) | 1994-02-23 |
| ES2097949T3 (en) | 1997-04-16 |
| ZA935235B (en) | 1994-03-02 |
| TW225517B (en) | 1994-06-21 |
| HUT64740A (en) | 1994-02-28 |
| CA2100718A1 (en) | 1994-02-14 |
| PL300037A1 (en) | 1994-04-05 |
| SK71693A3 (en) | 1994-06-08 |
| HU214218B (en) | 1998-01-28 |
| MX9304898A (en) | 1994-04-29 |
| ATA163192A (en) | 1994-06-15 |
| NO932691L (en) | 1994-02-14 |
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