NL192519C - Werkwijze voor het bereiden van zeer zuiver formaldehyde. - Google Patents
Werkwijze voor het bereiden van zeer zuiver formaldehyde. Download PDFInfo
- Publication number
- NL192519C NL192519C NL8900865A NL8900865A NL192519C NL 192519 C NL192519 C NL 192519C NL 8900865 A NL8900865 A NL 8900865A NL 8900865 A NL8900865 A NL 8900865A NL 192519 C NL192519 C NL 192519C
- Authority
- NL
- Netherlands
- Prior art keywords
- formaldehyde
- water
- distillation
- column
- methanol
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/02—Saturated compounds having —CHO groups bound to acyclic carbon atoms or to hydrogen
- C07C47/04—Formaldehyde
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
- C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
- C07C45/83—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation by extractive distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C47/00—Compounds having —CHO groups
- C07C47/38—Unsaturated compounds having —CHO groups bound to carbon atoms of rings other than six—membered aromatic rings
- C07C47/45—Unsaturated compounds having —CHO groups bound to carbon atoms of rings other than six—membered aromatic rings having unsaturation outside the rings
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8406388 | 1988-04-07 | ||
| JP8406388 | 1988-04-07 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NL8900865A NL8900865A (nl) | 1989-11-01 |
| NL192519B NL192519B (nl) | 1997-05-01 |
| NL192519C true NL192519C (nl) | 1997-09-02 |
Family
ID=13820038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8900865A NL192519C (nl) | 1988-04-07 | 1989-04-07 | Werkwijze voor het bereiden van zeer zuiver formaldehyde. |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4962235A (ko) |
| KR (1) | KR910006324B1 (ko) |
| GB (1) | GB2218089B (ko) |
| NL (1) | NL192519C (ko) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5223102A (en) * | 1992-03-03 | 1993-06-29 | E. I. Du Pont De Nemours And Company | Process for the electrooxidation of methanol to formaldehyde and methylal |
| GB9812083D0 (en) | 1998-06-05 | 1998-08-05 | Ici Plc | Removal of water |
| CN106866615B (zh) | 2011-11-24 | 2022-01-11 | 塞拉尼斯销售德国有限公司 | 用于生产三氧杂环己烷的方法 |
| WO2019191445A1 (en) | 2018-03-29 | 2019-10-03 | Celanese Sales Germany Gmbh | Process for producing a cyclic acetal in a heterogeneous reaction system |
| CN109369607B (zh) * | 2018-11-15 | 2023-08-01 | 凯瑞环保科技股份有限公司 | 一种共沸催化反应合成三聚甲醛的装置和方法 |
| CN112479846A (zh) * | 2020-11-27 | 2021-03-12 | 潍坊惠丰化工有限公司 | 一种溶剂直接吸收法生产无水甲醛的工艺方法 |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3217042A (en) * | 1965-11-09 | Purification of formaldehyde | ||
| US2943701A (en) * | 1960-07-05 | Effect of chso oonoenteation in the chhf | ||
| US2678905A (en) * | 1949-11-17 | 1954-05-18 | Celanese Corp | Purification of aqueous formaldehyde solutions by extractive distillation |
| US2780652A (en) * | 1954-05-13 | 1957-02-05 | Du Pont | Preparation of high purity formaldehyde |
| NL263828A (ko) * | 1960-06-14 | |||
| DE1928633C3 (de) * | 1969-06-06 | 1978-03-23 | Basf Ag, 6700 Ludwigshafen | Verfahren zur Herstellung von wasserarmen Lösungen von Formaldehyd |
| BE794046A (fr) * | 1972-01-15 | 1973-07-16 | Basf Ag | Procede de preparation de solutions aqueuses de formaldehyde pauvres en methanol |
-
1989
- 1989-04-05 GB GB8907634A patent/GB2218089B/en not_active Expired - Lifetime
- 1989-04-05 US US07/333,226 patent/US4962235A/en not_active Expired - Lifetime
- 1989-04-07 NL NL8900865A patent/NL192519C/nl not_active IP Right Cessation
- 1989-04-07 KR KR1019890004618A patent/KR910006324B1/ko not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GB2218089A (en) | 1989-11-08 |
| KR900016079A (ko) | 1990-11-12 |
| GB2218089B (en) | 1991-11-06 |
| NL192519B (nl) | 1997-05-01 |
| NL8900865A (nl) | 1989-11-01 |
| GB8907634D0 (en) | 1989-05-17 |
| US4962235A (en) | 1990-10-09 |
| KR910006324B1 (ko) | 1991-08-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A1B | A search report has been drawn up | ||
| BC | A request for examination has been filed | ||
| V1 | Lapsed because of non-payment of the annual fee |
Effective date: 20051101 |