NO140794C - PROCEDURE FOR THE PREPARATION OF ISOCYANATES - Google Patents
PROCEDURE FOR THE PREPARATION OF ISOCYANATESInfo
- Publication number
- NO140794C NO140794C NO741607A NO741607A NO140794C NO 140794 C NO140794 C NO 140794C NO 741607 A NO741607 A NO 741607A NO 741607 A NO741607 A NO 741607A NO 140794 C NO140794 C NO 140794C
- Authority
- NO
- Norway
- Prior art keywords
- radicals
- carbon atoms
- mono
- rings
- ester
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1458595 Isocyanate preparation ATLANTIC RICHFIELD CO 3 May 1974 [4 May 1973 8 March 1973] 19578/74 Heading C2C Isocyanates are prepared by thermally decomposing an ester of a carbamic acid having the formula R(NHCOOR<SP>1</SP>) x or (RNHCOO) x R<SP>1</SP> wherein each R is an optionally substituted mono-, di- or tri-valent organic radical selected from saturated and monoolefinic unsaturated straight and branched chain aliphatic and cyclealiphatic radicals of not more than 32 carbon atoms, alkoxyalkyl radicals of not more than 32 carbon atoms, and aryl, aralkyl and alkaryl radicals having 1 to 5 rings; each R<SP>1</SP> is an optionally substituted mono-, di- or tri-valent organic radical selected from saturated and monoolefinic unsaturated straight and branched chain aliphatic and cycloaliphatic radicals of not more than 32 carbon atoms, alkoxy-alkyl radicals of not more than 32 carbon atoms, and aryl, aralkyl and alkaryl radicals containing 1 to 3 rings; and x is 1, 2 or 3; at from 175‹ to 350‹ C. while said ester is dissolved in an inert solvent to produce an isocyanate and an alcohol, the solvent being a compound or mixture of compounds which is (a) a solvent for said ester, (b) liquid and stable at the decomposition temperature and (c) nonreactive with isocyanate product, and selected from optionally halo- and mono-nitro-substituted C 4 to C 32 aliphatic hydrocarbons, cycloaliphatic hydrocarbons, aromatic hydrocarbons having 1 to 3 rings, (C 1 to C 15 alkyl)benzenes, halo- and mono-nitro-derivatives of the aromatic hydrocarbons and alkylbenzenes, and C 4 to C 32 ethers, ketones and carboxylic esters and their sulphur analogues.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US35730173A | 1973-05-04 | 1973-05-04 | |
| US44929174A | 1974-03-08 | 1974-03-08 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO741607L NO741607L (en) | 1974-11-05 |
| NO140794B NO140794B (en) | 1979-08-06 |
| NO140794C true NO140794C (en) | 1979-11-14 |
Family
ID=26999595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO741607A NO140794C (en) | 1973-05-04 | 1974-05-03 | PROCEDURE FOR THE PREPARATION OF ISOCYANATES |
Country Status (21)
| Country | Link |
|---|---|
| JP (1) | JPS5030832A (en) |
| AR (1) | AR202301A1 (en) |
| AU (1) | AU477106B2 (en) |
| CA (1) | CA1023379A (en) |
| CH (1) | CH598199A5 (en) |
| DD (1) | DD112990A5 (en) |
| DE (1) | DE2421503B2 (en) |
| ES (1) | ES425950A1 (en) |
| FR (1) | FR2228056B1 (en) |
| GB (1) | GB1458595A (en) |
| HU (1) | HU171538B (en) |
| IL (1) | IL44694A (en) |
| IN (1) | IN141148B (en) |
| LU (1) | LU69986A1 (en) |
| MY (1) | MY7700322A (en) |
| NL (1) | NL7405881A (en) |
| NO (1) | NO140794C (en) |
| PH (1) | PH11683A (en) |
| RO (1) | RO63097A (en) |
| SE (1) | SE419539B (en) |
| YU (1) | YU120074A (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5219624A (en) * | 1975-08-07 | 1977-02-15 | Mitsui Toatsu Chem Inc | Process for preparation of isocyanates |
| JPS5488222A (en) * | 1977-12-20 | 1979-07-13 | Mitsubishi Chem Ind Ltd | Preparation of isocyanate from carbamate |
| DE2819826A1 (en) | 1978-05-05 | 1979-11-08 | Bayer Ag | PROCESS FOR THE PRODUCTION OF URETHANES |
| JPS5576484U (en) * | 1978-11-13 | 1980-05-26 | ||
| DE3009489A1 (en) | 1980-03-12 | 1981-09-17 | Bayer Ag, 5090 Leverkusen | METHOD FOR PRODUCING URETHANES |
| US4487713A (en) * | 1981-06-26 | 1984-12-11 | Exxon Research & Engineering Co. | Production of isocyanates from esters of aromatic carbamic acids (urethanes) |
| JPH02231461A (en) * | 1989-03-06 | 1990-09-13 | Mitsubishi Gas Chem Co Inc | Production of xylene diisocyanate |
| DE4141402A1 (en) * | 1991-12-16 | 1993-06-17 | Bayer Ag | METHOD FOR PRODUCING HIGH-PURITY AROMATIC DI- AND / OR POLYURETHANES |
| DE10209095A1 (en) | 2002-03-01 | 2003-09-11 | Basf Ag | Process for the preparation of isocyanates |
| US9000219B2 (en) * | 2009-12-24 | 2015-04-07 | Mitsui Chemicals, Inc. | Method for treatment of isocyanate residue, and method for treatment of carbonate |
-
1974
- 1974-04-02 CA CA196,577A patent/CA1023379A/en not_active Expired
- 1974-04-11 AU AU67801/74A patent/AU477106B2/en not_active Expired
- 1974-04-16 SE SE7405108A patent/SE419539B/en unknown
- 1974-04-23 IL IL44694A patent/IL44694A/en unknown
- 1974-04-24 PH PH15776A patent/PH11683A/en unknown
- 1974-04-24 IN IN927/CAL/1974A patent/IN141148B/en unknown
- 1974-04-29 YU YU01200/74A patent/YU120074A/en unknown
- 1974-05-02 NL NL7405881A patent/NL7405881A/xx unknown
- 1974-05-03 DD DD178284A patent/DD112990A5/xx unknown
- 1974-05-03 CH CH608974A patent/CH598199A5/xx not_active IP Right Cessation
- 1974-05-03 HU HU74AA00000769A patent/HU171538B/en unknown
- 1974-05-03 DE DE2421503A patent/DE2421503B2/en not_active Ceased
- 1974-05-03 FR FR747415446A patent/FR2228056B1/fr not_active Expired
- 1974-05-03 LU LU69986A patent/LU69986A1/xx unknown
- 1974-05-03 GB GB1957874A patent/GB1458595A/en not_active Expired
- 1974-05-03 ES ES425950A patent/ES425950A1/en not_active Expired
- 1974-05-03 NO NO741607A patent/NO140794C/en unknown
- 1974-05-03 RO RO7400078670A patent/RO63097A/en unknown
- 1974-05-03 AR AR253577A patent/AR202301A1/en active
- 1974-05-04 JP JP49050194A patent/JPS5030832A/ja active Pending
-
1977
- 1977-12-31 MY MY1977322A patent/MY7700322A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CA1023379A (en) | 1977-12-27 |
| AU6780174A (en) | 1975-10-16 |
| LU69986A1 (en) | 1974-11-28 |
| MY7700322A (en) | 1977-12-31 |
| FR2228056A1 (en) | 1974-11-29 |
| DD112990A5 (en) | 1975-05-12 |
| NO741607L (en) | 1974-11-05 |
| DE2421503B2 (en) | 1978-12-21 |
| YU120074A (en) | 1982-06-18 |
| AU477106B2 (en) | 1976-10-14 |
| NL7405881A (en) | 1974-11-06 |
| AR202301A1 (en) | 1975-05-30 |
| DE2421503A1 (en) | 1974-11-21 |
| NO140794B (en) | 1979-08-06 |
| HU171538B (en) | 1978-02-28 |
| CH598199A5 (en) | 1978-04-28 |
| GB1458595A (en) | 1976-12-15 |
| PH11683A (en) | 1978-05-19 |
| FR2228056B1 (en) | 1979-02-09 |
| RO63097A (en) | 1978-06-15 |
| IN141148B (en) | 1977-01-22 |
| IL44694A (en) | 1978-06-15 |
| ES425950A1 (en) | 1976-09-16 |
| SE419539B (en) | 1981-08-10 |
| IL44694A0 (en) | 1974-06-30 |
| JPS5030832A (en) | 1975-03-27 |
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