GB600525A - Improvements in or relating to a process for the concentration of acetaldol - Google Patents
Improvements in or relating to a process for the concentration of acetaldolInfo
- Publication number
- GB600525A GB600525A GB2829145A GB2829145A GB600525A GB 600525 A GB600525 A GB 600525A GB 2829145 A GB2829145 A GB 2829145A GB 2829145 A GB2829145 A GB 2829145A GB 600525 A GB600525 A GB 600525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acetaldol
- liquid
- acetaldehyde
- concentration
- temperature
- 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
- IKHGUXGNUITLKF-UHFFFAOYSA-N acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 abstract 10
- 239000007788 liquid Substances 0.000 abstract 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- HSJKGGMUJITCBW-UHFFFAOYSA-N 3-Hydroxybutanal Chemical compound CC(O)CC=O HSJKGGMUJITCBW-UHFFFAOYSA-N 0.000 abstract 1
- 229910000564 Raney nickel Inorganic materials 0.000 abstract 1
- 239000000969 carrier Substances 0.000 abstract 1
- 239000003054 catalyst Substances 0.000 abstract 1
- 230000002493 climbing Effects 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 230000003472 neutralizing Effects 0.000 abstract 1
- WHBMMWSBFZVSSR-UHFFFAOYSA-N β-Hydroxybutyric acid Chemical compound CC(O)CC(O)=O WHBMMWSBFZVSSR-UHFFFAOYSA-N 0.000 abstract 1
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
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/67—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton
- C07C45/68—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
- C07C45/72—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms by reaction of compounds containing >C = O groups with the same or other compounds containing >C = O groups
-
- 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
- C07C45/79—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Acetaldol containing acetaldehyde, neutralized to a pH to 6.5 to 7.5, is passed in the form of a liquid film over a surface heated to a temperature of 90 DEG to 110 DEG C., the contact time being adjusted to a value not exceeding that required to reduce the concentration of acetaldehyde in the liquid to the equilibrium concentration at the temperature employed. The preferred contact times are from 0.5 to 5 seconds. The process may be carried out in a climbing film evaporator such as an S-shaped copper tube ( 1/4 inch to 3/8 inch I.D.) 3 feet long, the middle part of which is vertical and provided with a steam-jacket. Crude acetaldol, containing not more than 70 per cent aldol, is fed in at the bottom at such a rate that the evolution of acetaldehyde is rapid enough to cause the liquid to climb upwards as a film. The vapours and concentrated liquid are discharged into a wider heat-insulated tube wherein they are separated, the latter being withdrawn to a cooler to prevent crotonisation. A series of parallel tubes connected at the bottom to a single feed tube, and at the top to a single separator, may be used in place of the S-shaped tube. A second stage operating under reduced pressure may be employed, if desired. Specification 573,334, [Group IV], is referred to.ALSO:Acetaldol containing acetaldehyde is concentrated by neutralizing it to a pH of 6.5 to 7.5 and then passing it in the form of a liquid film over a surface heated to a temperature of 90 DEG to 110 DEG C., the contact time being adjusted to a value not exceeding that required to reduce the concentration of acetaldehyde in the liquid to the equilibrium concentration at the temperature employed. The preferred contact times are from 0.5 to 5 seconds. The purified acetaldol so obtained has a high degree of reactivity and may be readily hydrogenated to 1.3-butylene glycol at atmospheric pressure and at 70 DEG C. using a Raney nickel catalyst. The purified acetaldol may be rapidly oxidized to betahydroxybutyric acid by treating it between 50 DEG and 80 DEG C. with oxygen in the presence of an oxygen - carrier catalyst. Specification 573,334 is referred to.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB600525A true GB600525A (en) | 1948-04-12 |
Family
ID=1741022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2829145A Expired GB600525A (en) | 1945-10-26 | Improvements in or relating to a process for the concentration of acetaldol |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB600525A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2688591A (en) * | 1950-05-06 | 1954-09-07 | Standard Oil Co | Purification of oxo-process aldehydes by distillation |
| CN111704532A (en) * | 2020-07-02 | 2020-09-25 | 中国天辰工程有限公司 | Method for removing acetaldehyde in 3-hydroxybutyraldehyde crude product |
-
1945
- 1945-10-26 GB GB2829145A patent/GB600525A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2688591A (en) * | 1950-05-06 | 1954-09-07 | Standard Oil Co | Purification of oxo-process aldehydes by distillation |
| CN111704532A (en) * | 2020-07-02 | 2020-09-25 | 中国天辰工程有限公司 | Method for removing acetaldehyde in 3-hydroxybutyraldehyde crude product |
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