NL6911680A - - Google Patents
Info
- Publication number
- NL6911680A NL6911680A NL6911680A NL6911680A NL6911680A NL 6911680 A NL6911680 A NL 6911680A NL 6911680 A NL6911680 A NL 6911680A NL 6911680 A NL6911680 A NL 6911680A NL 6911680 A NL6911680 A NL 6911680A
- Authority
- NL
- Netherlands
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
- C07C263/20—Separation; Purification
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74934668A | 1968-08-01 | 1968-08-01 | |
| US77279068A | 1968-11-01 | 1968-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6911680A true NL6911680A (en) | 1970-02-03 |
Family
ID=27115103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6911680A NL6911680A (en) | 1968-08-01 | 1969-07-31 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE736785A (en) |
| DE (1) | DE1938384A1 (en) |
| FR (1) | FR2014838A1 (en) |
| GB (1) | GB1229181A (en) |
| NL (1) | NL6911680A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4118410A (en) | 1971-02-04 | 1978-10-03 | Gottfried Reuter Gmbh I.L. | Polyphenyl-polymethylene-polyisocyanate mixtures |
| DE3145010A1 (en) | 1981-11-12 | 1983-05-19 | Bayer Ag, 5090 Leverkusen | METHOD FOR PRODUCING 4,4'-DIISOCYANATODIPHENYLMETHANE |
| US4661627A (en) * | 1986-08-19 | 1987-04-28 | The Dow Chemical Company | Method for scavenging acidic impurities from polymeric isocyanates |
| DE19914292A1 (en) | 1999-03-30 | 2000-10-05 | Bayer Ag | Reduction of the chorine content of low molecular isocyanates comprises reaction with a tertiary or quaternary amine group containing anion exchanger for ten minutes at less than two hundred degrees |
| DE19914291A1 (en) | 1999-03-30 | 2000-10-05 | Bayer Ag | Process for the purification of a low molecular isocyanate, comprises addition of an oligomeric organic polyphosphate compound and heating for ten minutes below two hundred degrees |
| DE19922572A1 (en) | 1999-05-17 | 2000-11-23 | Bayer Ag | Process for the purification of organic isocyanates, the organic isocyanates thus purified and their use |
| DE102004005320A1 (en) * | 2004-02-04 | 2005-08-25 | Bayer Materialscience Ag | Preparation of di- and polysocyanates of the diphenylmethane series with defined acidity |
| DE102005026864A1 (en) | 2005-06-10 | 2006-12-14 | Bayer Materialscience Ag | Process for the preparation of 4,4'-diphenylmethane diisocyanate |
| BR112013012255A2 (en) | 2010-11-17 | 2016-08-09 | Basf Se | process for preparing methylene diphenyl diisocyanate |
| US8907124B2 (en) | 2010-11-17 | 2014-12-09 | Basf Se | Process for preparing methylenedi(phenyl isocyanate) |
| CN112142623A (en) * | 2019-06-27 | 2020-12-29 | 万华化学（宁波）有限公司 | Preparation method and application of low-activity MDI-50 product |
-
1969
- 1969-07-10 GB GB1229181D patent/GB1229181A/en not_active Expired
- 1969-07-24 FR FR6925263A patent/FR2014838A1/fr not_active Withdrawn
- 1969-07-29 DE DE19691938384 patent/DE1938384A1/en active Pending
- 1969-07-30 BE BE736785D patent/BE736785A/xx unknown
- 1969-07-31 NL NL6911680A patent/NL6911680A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1229181A (en) | 1971-04-21 |
| FR2014838A1 (en) | 1970-04-24 |
| BE736785A (en) | 1969-12-31 |
| DE1938384A1 (en) | 1970-03-26 |