JPS524548B2 - - Google Patents
Info
- Publication number
- JPS524548B2 JPS524548B2 JP49019860A JP1986074A JPS524548B2 JP S524548 B2 JPS524548 B2 JP S524548B2 JP 49019860 A JP49019860 A JP 49019860A JP 1986074 A JP1986074 A JP 1986074A JP S524548 B2 JPS524548 B2 JP S524548B2
- Authority
- JP
- Japan
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/18—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/18—Separation; Purification; Stabilisation; Use of additives
- C07C263/20—Separation; Purification
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US334048A US3892634A (en) | 1973-02-20 | 1973-02-20 | Separation of 2,4{40 {0 and 4,4{40 {0 methylene bis(phenyl isocyanate) from polymethylene polyphenyl polyisocyanates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS49134660A JPS49134660A (ja) | 1974-12-25 |
| JPS524548B2 true JPS524548B2 (ja) | 1977-02-04 |
Family
ID=23305353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP49019860A Expired JPS524548B2 (ja) | 1973-02-20 | 1974-02-19 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3892634A (ja) |
| JP (1) | JPS524548B2 (ja) |
| DD (1) | DD110859A5 (ja) |
| DE (1) | DE2404170C3 (ja) |
| NL (1) | NL162367C (ja) |
| SU (1) | SU564806A3 (ja) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1039744B (it) * | 1975-07-08 | 1979-12-10 | Sir Soc Italiana Resine Spa | Procedimento per la preparazione di diepossidi |
| DE3145010A1 (de) * | 1981-11-12 | 1983-05-19 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung von 4,4'-diisocyanatodiphenylmethan |
| US4792624A (en) * | 1987-02-26 | 1988-12-20 | The Dow Chemical Company | Process for polymeric MDA, recycle of finished polymeric MDA |
| US4876380A (en) * | 1988-08-31 | 1989-10-24 | The Dow Chemical Company | Color reduction of polymeric isocyanates via multiple solvent fractionation |
| US5209827A (en) * | 1990-10-29 | 1993-05-11 | Eastman Kodak Company | Process for the purification of hydroxypivalyl hydroxypivalate |
| DE4142769A1 (de) * | 1991-12-23 | 1993-06-24 | Bayer Hispania Ind S A | Verfahren zur herstellung von isocyanaten und aufarbeitung des rueckstandes |
| DE10245584A1 (de) * | 2002-09-27 | 2004-04-08 | Basf Ag | Aufarbeitung von Reaktionsausträgen aus Phosgenierreaktoren |
| EP1518874B1 (de) * | 2003-09-24 | 2006-12-13 | Basf Aktiengesellschaft | Monomerarmes Gemisch, enthaltend polymeres MDI |
| DE102005026864A1 (de) * | 2005-06-10 | 2006-12-14 | Bayer Materialscience Ag | Verfahren zur Herstellung von 4,4'-Diphenylmethandiisocyanat |
| EP3571185A1 (de) * | 2017-01-18 | 2019-11-27 | Covestro Deutschland AG | Verfahren zur rückgewinnung von diisocyanaten aus destillationsrückständen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1263439A (en) * | 1969-05-07 | 1972-02-09 | Bayer Ag | A process for the production of isocyanates |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3211631A (en) * | 1965-10-12 | Noilvttitsig gnv noijovhlxh | ||
| US3183112A (en) * | 1955-12-06 | 1965-05-11 | Bayer Ag | Isocyanates and method of preparing same |
| US3140305A (en) * | 1962-12-17 | 1964-07-07 | Fmc Corp | Preparation of diisocyanates |
| US3457291A (en) * | 1965-04-01 | 1969-07-22 | Union Carbide Corp | Production of isocyanates |
| US3410888A (en) * | 1965-05-18 | 1968-11-12 | Upjohn Co | Process for recovering aromatic diisocyanates |
| BE755243Q (fr) * | 1965-07-08 | 1971-02-01 | Upjohn Co | Procedes de fabrication d'isocyanates et de polyisocyanates |
| FR1469105A (fr) * | 1965-12-27 | 1967-02-10 | Toulousaine De Prod Chim Toloc | Procédé de fabrication d'esters isocyaniques |
| GB1109413A (en) * | 1967-03-13 | 1968-04-10 | Paul Alfred Johnson | Improvements in wall plaques, statuettes, advertising devices and the like |
| US3565768A (en) * | 1968-04-19 | 1971-02-23 | Du Pont | Process for refining 4,4'-methylenebis (cyclohexyl isocyanate) |
| US3554872A (en) * | 1968-07-24 | 1971-01-12 | American Cyanamid Co | Process for separation of 2,6-tolylene diisocyanate from isomeric mixtures |
-
1973
- 1973-02-20 US US334048A patent/US3892634A/en not_active Expired - Lifetime
-
1974
- 1974-01-29 DE DE2404170A patent/DE2404170C3/de not_active Expired
- 1974-02-04 NL NL7401500.A patent/NL162367C/xx not_active IP Right Cessation
- 1974-02-18 DD DD176626A patent/DD110859A5/xx unknown
- 1974-02-19 JP JP49019860A patent/JPS524548B2/ja not_active Expired
- 1974-02-19 SU SU7401997556A patent/SU564806A3/ru active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1263439A (en) * | 1969-05-07 | 1972-02-09 | Bayer Ag | A process for the production of isocyanates |
Also Published As
| Publication number | Publication date |
|---|---|
| NL162367C (nl) | 1980-05-16 |
| DE2404170C3 (de) | 1979-11-22 |
| DE2404170B2 (de) | 1979-04-05 |
| JPS49134660A (ja) | 1974-12-25 |
| DD110859A5 (ja) | 1975-01-12 |
| SU564806A3 (ru) | 1977-07-05 |
| US3892634A (en) | 1975-07-01 |
| DE2404170A1 (de) | 1974-09-19 |
| NL7401500A (ja) | 1974-08-22 |
| NL162367B (nl) | 1979-12-17 |