GB1229181A - - Google Patents
Info
- Publication number
- GB1229181A GB1229181A GB1229181DA GB1229181A GB 1229181 A GB1229181 A GB 1229181A GB 1229181D A GB1229181D A GB 1229181DA GB 1229181 A GB1229181 A GB 1229181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diisocyanate
- methylene
- pure
- mother liquor
- acidic impurity
- Prior art date
- 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
- 125000005442 diisocyanate group Chemical group 0.000 abstract 4
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 abstract 2
- 230000002378 acidificating effect Effects 0.000 abstract 2
- 239000012535 impurity Substances 0.000 abstract 2
- 239000012452 mother liquor Substances 0.000 abstract 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 229910052801 chlorine Inorganic materials 0.000 abstract 1
- 239000000460 chlorine Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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 |
|---|---|
| GB1229181A true GB1229181A (enrdf_load_stackoverflow) | 1971-04-21 |
Family
ID=27115103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1229181D Expired GB1229181A (enrdf_load_stackoverflow) | 1968-08-01 | 1969-07-10 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE736785A (enrdf_load_stackoverflow) |
| DE (1) | DE1938384A1 (enrdf_load_stackoverflow) |
| FR (1) | FR2014838A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1229181A (enrdf_load_stackoverflow) |
| NL (1) | NL6911680A (enrdf_load_stackoverflow) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414074A (en) | 1981-11-12 | 1983-11-08 | Bayer Aktiengesellschaft | Process for the purification of 4,4'-diisocyanatodiphenylmethane by plural distillations |
| US4661627A (en) * | 1986-08-19 | 1987-04-28 | The Dow Chemical Company | Method for scavenging acidic impurities from polymeric isocyanates |
| US6222066B1 (en) | 1999-03-30 | 2001-04-24 | Bayer Aktiengesellschaft | Process for decreasing the chlorine content of organic isocyanates |
| US6391161B1 (en) | 1999-03-30 | 2002-05-21 | Bayer Aktiengesellschaft | Method for reducing the chlorine content of low molecular weight isocyanates |
| US6395925B1 (en) | 1999-05-17 | 2002-05-28 | Bayer Aktiengesellschaft | Process for purifying organic isocyanates, the organic isocyanates so purified and their use |
| CN112142623A (zh) * | 2019-06-27 | 2020-12-29 | 万华化学（宁波）有限公司 | 一种低活性的mdi-50产品的制备方法及应用 |
Families Citing this family (5)
| 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 |
| DE102004005320A1 (de) * | 2004-02-04 | 2005-08-25 | Bayer Materialscience Ag | Herstellung von Di- und Polysocyanaten der Diphenylmethanreihe mit definierter Acidität |
| DE102005026864A1 (de) | 2005-06-10 | 2006-12-14 | Bayer Materialscience Ag | Verfahren zur Herstellung von 4,4'-Diphenylmethandiisocyanat |
| US8907124B2 (en) | 2010-11-17 | 2014-12-09 | Basf Se | Process for preparing methylenedi(phenyl isocyanate) |
| HUE044066T2 (hu) | 2010-11-17 | 2019-09-30 | Basf Se | Eljárás metilén-difenil-diizocianát elõállítására |
-
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/de active Pending
- 1969-07-30 BE BE736785D patent/BE736785A/xx unknown
- 1969-07-31 NL NL6911680A patent/NL6911680A/xx unknown
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4414074A (en) | 1981-11-12 | 1983-11-08 | Bayer Aktiengesellschaft | Process for the purification of 4,4'-diisocyanatodiphenylmethane by plural distillations |
| US4661627A (en) * | 1986-08-19 | 1987-04-28 | The Dow Chemical Company | Method for scavenging acidic impurities from polymeric isocyanates |
| US6222066B1 (en) | 1999-03-30 | 2001-04-24 | Bayer Aktiengesellschaft | Process for decreasing the chlorine content of organic isocyanates |
| US6391161B1 (en) | 1999-03-30 | 2002-05-21 | Bayer Aktiengesellschaft | Method for reducing the chlorine content of low molecular weight isocyanates |
| US6395925B1 (en) | 1999-05-17 | 2002-05-28 | Bayer Aktiengesellschaft | Process for purifying organic isocyanates, the organic isocyanates so purified and their use |
| CN112142623A (zh) * | 2019-06-27 | 2020-12-29 | 万华化学（宁波）有限公司 | 一种低活性的mdi-50产品的制备方法及应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6911680A (enrdf_load_stackoverflow) | 1970-02-03 |
| BE736785A (enrdf_load_stackoverflow) | 1969-12-31 |
| FR2014838A1 (enrdf_load_stackoverflow) | 1970-04-24 |
| DE1938384A1 (de) | 1970-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |