IL44694A - Production of aromatic isocyanates - Google Patents
Production of aromatic isocyanatesInfo
- Publication number
- IL44694A IL44694A IL44694A IL4469474A IL44694A IL 44694 A IL44694 A IL 44694A IL 44694 A IL44694 A IL 44694A IL 4469474 A IL4469474 A IL 4469474A IL 44694 A IL44694 A IL 44694A
- Authority
- IL
- Israel
- 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 (2)
| Publication Number | Publication Date |
|---|---|
| IL44694A0 IL44694A0 (en) | 1974-06-30 |
| IL44694A true IL44694A (en) | 1978-06-15 |
Family
ID=26999595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL44694A IL44694A (en) | 1973-05-04 | 1974-04-23 | Production of aromatic 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 |
| KR101429834B1 (en) * | 2009-12-24 | 2014-08-12 | 미쓰이 가가쿠 가부시키가이샤 | 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 IN IN927/CAL/1974A patent/IN141148B/en unknown
- 1974-04-24 PH PH15776A patent/PH11683A/en unknown
- 1974-04-29 YU YU01200/74A patent/YU120074A/en unknown
- 1974-05-02 NL NL7405881A patent/NL7405881A/xx unknown
- 1974-05-03 DE DE2421503A patent/DE2421503B2/en not_active Ceased
- 1974-05-03 DD DD178284A patent/DD112990A5/xx unknown
- 1974-05-03 FR FR747415446A patent/FR2228056B1/fr not_active Expired
- 1974-05-03 GB GB1957874A patent/GB1458595A/en not_active Expired
- 1974-05-03 LU LU69986A patent/LU69986A1/xx unknown
- 1974-05-03 NO NO741607A patent/NO140794C/en unknown
- 1974-05-03 CH CH608974A patent/CH598199A5/xx not_active IP Right Cessation
- 1974-05-03 RO RO7400078670A patent/RO63097A/en unknown
- 1974-05-03 ES ES425950A patent/ES425950A1/en not_active Expired
- 1974-05-03 AR AR253577A patent/AR202301A1/en active
- 1974-05-03 HU HU74AA00000769A patent/HU171538B/en unknown
- 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 |
|---|---|
| FR2228056B1 (en) | 1979-02-09 |
| MY7700322A (en) | 1977-12-31 |
| RO63097A (en) | 1978-06-15 |
| IL44694A0 (en) | 1974-06-30 |
| NO140794B (en) | 1979-08-06 |
| DE2421503B2 (en) | 1978-12-21 |
| HU171538B (en) | 1978-02-28 |
| LU69986A1 (en) | 1974-11-28 |
| CH598199A5 (en) | 1978-04-28 |
| AU477106B2 (en) | 1976-10-14 |
| DE2421503A1 (en) | 1974-11-21 |
| NO741607L (en) | 1974-11-05 |
| PH11683A (en) | 1978-05-19 |
| JPS5030832A (en) | 1975-03-27 |
| ES425950A1 (en) | 1976-09-16 |
| NO140794C (en) | 1979-11-14 |
| IN141148B (en) | 1977-01-22 |
| SE419539B (en) | 1981-08-10 |
| YU120074A (en) | 1982-06-18 |
| NL7405881A (en) | 1974-11-06 |
| DD112990A5 (en) | 1975-05-12 |
| FR2228056A1 (en) | 1974-11-29 |
| GB1458595A (en) | 1976-12-15 |
| AR202301A1 (en) | 1975-05-30 |
| CA1023379A (en) | 1977-12-27 |
| AU6780174A (en) | 1975-10-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| IL44694A (en) | Production of aromatic isocyanates | |
| GB1503965A (en) | Production of isocyanates from lower alkyl esters of mononuclear aromatic carbamic acids | |
| GB1359415A (en) | Process for making aryloxy derivatives of aromatic diesters and dinitriles and products derived therefrom | |
| ES445489A1 (en) | Antibiotic substances derived from antibiotic 67-694(rosamicin)and processes for their preparation | |
| EP0533048B1 (en) | Process for the preparation of lactams | |
| GB921801A (en) | Dithiophosphoric acid esters | |
| IT1228972B (en) | PROCEDURE FOR THE PREPARATION OF 3 ALPHA 7 ACID DIHYDROXICOLANIC BETA OF HIGH PURITY. | |
| ES483367A1 (en) | Process for the preparation of glycidyl esters of aromatic polycarboxylic acids. | |
| US3296068A (en) | Omicron-and mu-allyloxyphenyl and mu-alkoxy-phenyl-nu-methyl carbamates and the insecticidal use thereof | |
| GB881977A (en) | Thiophosphonic acid esters | |
| GB864632A (en) | Thionophosphonic acid esters | |
| GB1458695A (en) | Production of hydroxy aromatic ketones | |
| Miyagishima et al. | Further studies on synthesis and antimicrobial activity of thioformin analogues | |
| GB1232317A (en) | ||
| GB1063703A (en) | Improvements in or relating to combating undesirable plant growth and new cyclotriphosphazatriene derivatives therefor | |
| GB822476A (en) | Thionophosphoric acid esters and a process for their production | |
| GB1210269A (en) | Production of 4,6-pyrimidyl diethers and dithioethers | |
| ES8206522A1 (en) | Process for the Preparation of Apovincaminic Acid Esters | |
| SU1616103A1 (en) | Method of synthesis of o - alkyl - s - [(n - acyl - n - carbalkoxyalkyl) aminomethyl] - methyl - dithiophosphonates | |
| GB1063704A (en) | Improvements in or relating to combating plant growth and new cyclotriphosphazatriene derivatives therefor | |
| GB935398A (en) | Process for preparing esters of alkyl nitrophenols useful as fungicides | |
| IE37905L (en) | 7-acylamino-3-methyl-3-cephem-4-carboxylic acids | |
| GB896956A (en) | Phosphonic acid esters | |
| GB1478070A (en) | Esters of o-alkyloxycarbonyl and o-alkylthiocarbonyl- naphthohydroxamic acids their preparation and their miticidal compositions comprising them | |
| GB1132933A (en) | Solutions of basically reacting pharmaceutical compounds |