HU171538B - Process for preparing isothiocyanates - Google Patents
Process for preparing isothiocyanatesInfo
- Publication number
- HU171538B HU171538B HU74AA00000769A HUAA000769A HU171538B HU 171538 B HU171538 B HU 171538B HU 74AA00000769 A HU74AA00000769 A HU 74AA00000769A HU AA000769 A HUAA000769 A HU AA000769A HU 171538 B HU171538 B HU 171538B
- Authority
- HU
- Hungary
- 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 (1)
| Publication Number | Publication Date |
|---|---|
| HU171538B true HU171538B (en) | 1978-02-28 |
Family
ID=26999595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HU74AA00000769A HU171538B (en) | 1973-05-04 | 1974-05-03 | Process for preparing isothiocyanates |
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 |
| CN102652124B (en) * | 2009-12-24 | 2015-05-13 | 三井化学株式会社 | 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 AR AR253577A patent/AR202301A1/en active
- 1974-05-03 RO RO7400078670A patent/RO63097A/en unknown
- 1974-05-03 GB GB1957874A patent/GB1458595A/en not_active Expired
- 1974-05-03 HU HU74AA00000769A patent/HU171538B/en unknown
- 1974-05-03 LU LU69986A patent/LU69986A1/xx unknown
- 1974-05-03 FR FR747415446A patent/FR2228056B1/fr not_active Expired
- 1974-05-03 CH CH608974A patent/CH598199A5/xx not_active IP Right Cessation
- 1974-05-03 NO NO741607A patent/NO140794C/en unknown
- 1974-05-03 DE DE2421503A patent/DE2421503B2/en not_active Ceased
- 1974-05-03 ES ES425950A patent/ES425950A1/en not_active Expired
- 1974-05-03 DD DD178284A patent/DD112990A5/xx 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 |
|---|---|
| NO140794C (en) | 1979-11-14 |
| PH11683A (en) | 1978-05-19 |
| LU69986A1 (en) | 1974-11-28 |
| AU6780174A (en) | 1975-10-16 |
| DE2421503B2 (en) | 1978-12-21 |
| SE419539B (en) | 1981-08-10 |
| GB1458595A (en) | 1976-12-15 |
| AU477106B2 (en) | 1976-10-14 |
| MY7700322A (en) | 1977-12-31 |
| CH598199A5 (en) | 1978-04-28 |
| JPS5030832A (en) | 1975-03-27 |
| IL44694A (en) | 1978-06-15 |
| FR2228056B1 (en) | 1979-02-09 |
| DD112990A5 (en) | 1975-05-12 |
| RO63097A (en) | 1978-06-15 |
| NL7405881A (en) | 1974-11-06 |
| YU120074A (en) | 1982-06-18 |
| IN141148B (en) | 1977-01-22 |
| NO140794B (en) | 1979-08-06 |
| NO741607L (en) | 1974-11-05 |
| DE2421503A1 (en) | 1974-11-21 |
| ES425950A1 (en) | 1976-09-16 |
| FR2228056A1 (en) | 1974-11-29 |
| IL44694A0 (en) | 1974-06-30 |
| CA1023379A (en) | 1977-12-27 |
| AR202301A1 (en) | 1975-05-30 |
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