Claims
- 1. In a process for preparing a divalent alcohol by the catalytic hydrogenation of the hydroxyaldehyde corresponding to said divalent alcohol, the improvement which comprises hydrogenating at a temperature of 100.degree. to 200.degree. C., in a gaseous phase and in the presence of a hydrogenation catalyst, a mixture comprising up to 50% of a hydroxyaldehyde obtained through the aldol condensation of unsubstituted aldehydes, and a primary or secondary alcohol having 1 to 10 carbon atoms or an aldehyde or ketone which forms said alcohol, said alcohol being a solvent for and having a lower boiling point than the divalent alcohol and further being a solvent for the hydroxyaldehyde.
- 2. The process as recited in claim 1 wherein the said primary or secondary alcohol has 1 to 6 carbon atoms.
- 3. The process as recited in claim 1 wherein the mixture comprises 20 to 40% by weight of the hydroxyaldehyde.
- 4. The process as recited in claim 1 wherein the hydrogenation catalyst is a nickel catalyst.
- 5. The process as recited in claim 1 wherein the hydrogenation is carried out at 110.degree. to 150.degree. C.
- 6. The process as recited in claim 1 wherein the hydrogenation is carried out at about 1 to 4 atmospheres.
- 7. The process as recited in claim 1 wherein the hydrogenation is carried out at about 1.5 to 2 atmospheres.
- 8. The process as recited in claim 1 wherein the hydrogenation is performed with about 5 to 15 Nm.sup.3 recycle gas per hour per Kg of the hydroxyaldehyde.
- 9. The process as recited in claim 1 wherein the hydrogenation is performed with about 9 to 12 Nm.sup.3 recycle gas per hour per Kg of the hydroxyaldehyde.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2054601 |
Nov 1970 |
DT |
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Parent Case Info
This is a continuation of application Ser. No. 469,658, filed May 14, 1974, now abandoned which is a continuation of application Ser. No. 193,994, filed Oct. 29, 1971 now abandoned which claims the priority of German Patent Application No. P 20 54 601.4-42, filed Nov. 6, 1970.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
309,200 |
Mar 1929 |
UK |
Continuations (2)
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Number |
Date |
Country |
Parent |
469658 |
May 1974 |
|
Parent |
193994 |
Oct 1971 |
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