GB970855A - Improvements relating to the recovery of formaldehyde - Google Patents
Improvements relating to the recovery of formaldehydeInfo
- Publication number
- GB970855A GB970855A GB4114359A GB4114359A GB970855A GB 970855 A GB970855 A GB 970855A GB 4114359 A GB4114359 A GB 4114359A GB 4114359 A GB4114359 A GB 4114359A GB 970855 A GB970855 A GB 970855A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methanol
- column
- mixture
- formaldehyde
- fractionating
- 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
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Formaldehyde is recovered in the form of an aqueous solution from the mixture obtained by the catalytic conversion of methanol using a dehydrogenation catalyst and a feed consisting of methanol, water vapour and air, by fractionating in a column of the bubbling plate type, comprising utilising the heat in the product at least to aid the fractionation causing the liquid descending the fractionating column to the point of introduction of the mixture to take over one minute to pass over a plate, and maintaining a methanol concentration on the topmost plate of the column above 20% by weight. If desired, some of the heat in the mixture derived from the reactor may be taken off by means of a heat exchanger before the mixture is passed to the fractionating column. The aqueous formaldehyde solution containing only small amounts of methanol is removed from the bottom of the column. Preferably, after the fractionation, sufficient water is added to dissolve the methanol and the resulting mixture is used for the production of more formaldehyde. The Specification contains description and drawings of suitable apparatus for carrying out the process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4114359A GB970855A (en) | 1959-12-03 | 1959-12-03 | Improvements relating to the recovery of formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4114359A GB970855A (en) | 1959-12-03 | 1959-12-03 | Improvements relating to the recovery of formaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB970855A true GB970855A (en) | 1964-09-23 |
Family
ID=10418304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4114359A Expired GB970855A (en) | 1959-12-03 | 1959-12-03 | Improvements relating to the recovery of formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB970855A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1290534B (en) * | 1965-12-01 | 1969-03-13 | Karl Fischer App U Rohrleitung | Process for the production of highly concentrated formaldehyde solutions |
| CN103539299A (en) * | 2012-07-10 | 2014-01-29 | 南京大学 | Process for recycling wastewater containing low boiling-point organism such as formaldehyde and high-concentration inorganic salt |
-
1959
- 1959-12-03 GB GB4114359A patent/GB970855A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1290534B (en) * | 1965-12-01 | 1969-03-13 | Karl Fischer App U Rohrleitung | Process for the production of highly concentrated formaldehyde solutions |
| CN103539299A (en) * | 2012-07-10 | 2014-01-29 | 南京大学 | Process for recycling wastewater containing low boiling-point organism such as formaldehyde and high-concentration inorganic salt |
| CN103539299B (en) * | 2012-07-10 | 2014-11-05 | 南京大学 | Process for recycling wastewater containing low boiling-point organism such as formaldehyde and high-concentration inorganic salt |
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