ES439618A1 - Un procedimiento para la purificacion de difenil-metano-4, 4'-diisocianato. - Google Patents
Un procedimiento para la purificacion de difenil-metano-4, 4'-diisocianato.Info
- Publication number
- ES439618A1 ES439618A1 ES439618A ES439618A ES439618A1 ES 439618 A1 ES439618 A1 ES 439618A1 ES 439618 A ES439618 A ES 439618A ES 439618 A ES439618 A ES 439618A ES 439618 A1 ES439618 A1 ES 439618A1
- Authority
- ES
- Spain
- Prior art keywords
- diisocyanate
- purification
- mdi
- crude mixture
- upper layer
- 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
- 238000000746 purification Methods 0.000 title abstract 2
- 125000005442 diisocyanate group Chemical group 0.000 title 1
- 239000000203 mixture Substances 0.000 abstract 2
- 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 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000002425 crystallisation Methods 0.000 abstract 1
- 230000008025 crystallization Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 238000000034 method Methods 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3272174A GB1517162A (en) | 1974-07-24 | 1974-07-24 | Purification of diisocyanate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES439618A1 true ES439618A1 (es) | 1977-01-16 |
Family
ID=10343032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES439618A Expired ES439618A1 (es) | 1974-07-24 | 1975-07-22 | Un procedimiento para la purificacion de difenil-metano-4, 4'-diisocianato. |
Country Status (12)
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201066A (en) * | 1978-03-29 | 1980-05-06 | Damon Corporation | Flexible shaft construction for a high inertia centrifuge |
| DE3329124A1 (de) * | 1983-08-11 | 1985-02-28 | Bayer Ag, 5090 Leverkusen | Verfahren zur reinigung von polyisocyanaten und die so gereinigten polyisocyanate |
| DE3430022A1 (de) * | 1984-08-16 | 1986-02-27 | Bayer Ag, 5090 Leverkusen | Verfahren zur gewinnung von reinen diisocyanaten |
| JPS62185917U (enrdf_load_html_response) * | 1986-05-20 | 1987-11-26 | ||
| JPH0179269U (enrdf_load_html_response) * | 1987-11-18 | 1989-05-29 | ||
| DE19914291A1 (de) | 1999-03-30 | 2000-10-05 | Bayer Ag | Verfahren zur Absenkung des Chlorgehaltes von niedermolekularen Isocyanaten |
| DE19914292A1 (de) | 1999-03-30 | 2000-10-05 | Bayer Ag | Verfahren zur Verringerung des Chlorgehaltes von organischen Isocyanaten |
| DE19922572A1 (de) | 1999-05-17 | 2000-11-23 | Bayer Ag | Verfahren zur Reinigung von organischen Isocyanaten, die so gereinigten organischen Isocyanate und ihre Verwendung |
| DE102004005319A1 (de) | 2004-02-04 | 2005-08-25 | Bayer Materialscience Ag | Verfahren zur Herstellung von hochreinem 2,4'-Methylendiphenyldiisocyanat |
| JP2022170318A (ja) * | 2021-04-28 | 2022-11-10 | 旭化成株式会社 | イソシアネートの製造方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE756979A (fr) * | 1969-10-04 | 1971-03-16 | Bayer Ag | Procede de purification du diphenylmethane-4,4' -diisocyanate |
-
1974
- 1974-07-24 GB GB3272174A patent/GB1517162A/en not_active Expired
-
1975
- 1975-07-16 BE BE1006784A patent/BE831413A/xx not_active IP Right Cessation
- 1975-07-22 AT AT566075A patent/AT337669B/de not_active IP Right Cessation
- 1975-07-22 NL NL7508717A patent/NL7508717A/xx not_active Application Discontinuation
- 1975-07-22 DE DE19752532722 patent/DE2532722C2/de not_active Expired
- 1975-07-22 SE SE7508355A patent/SE426167B/xx not_active IP Right Cessation
- 1975-07-22 BR BR7504660A patent/BR7504660A/pt unknown
- 1975-07-22 IT IT2565375A patent/IT1039988B/it active
- 1975-07-22 FR FR7522790A patent/FR2279723A1/fr active Granted
- 1975-07-22 DD DD18741575A patent/DD118618A5/xx unknown
- 1975-07-22 JP JP8893975A patent/JPS5134137A/ja active Granted
- 1975-07-22 ES ES439618A patent/ES439618A1/es not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2279723B1 (enrdf_load_html_response) | 1977-12-09 |
| GB1517162A (en) | 1978-07-12 |
| BE831413A (nl) | 1976-01-16 |
| IT1039988B (it) | 1979-12-10 |
| BR7504660A (pt) | 1976-07-06 |
| SE7508355L (sv) | 1976-01-26 |
| AT337669B (de) | 1977-07-11 |
| FR2279723A1 (fr) | 1976-02-20 |
| NL7508717A (nl) | 1976-01-27 |
| AU8327375A (en) | 1977-01-27 |
| DD118618A5 (enrdf_load_html_response) | 1976-03-12 |
| DE2532722C2 (de) | 1985-02-21 |
| SE426167B (sv) | 1982-12-13 |
| JPS5134137A (en) | 1976-03-23 |
| JPS6123180B2 (enrdf_load_html_response) | 1986-06-04 |
| DE2532722A1 (de) | 1976-02-05 |
| ATA566075A (de) | 1976-11-15 |
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