GB834771A - Improvements relating to the production of glycerol and glycols - Google Patents
Improvements relating to the production of glycerol and glycolsInfo
- Publication number
- GB834771A GB834771A GB34865/58A GB3486558A GB834771A GB 834771 A GB834771 A GB 834771A GB 34865/58 A GB34865/58 A GB 34865/58A GB 3486558 A GB3486558 A GB 3486558A GB 834771 A GB834771 A GB 834771A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glycols
- glycerol
- solution
- under pressure
- oxygen under
- 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
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/20—Dihydroxylic alcohols
- C07C31/205—1,3-Propanediol; 1,2-Propanediol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/60—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by elimination of -OH groups, e.g. by dehydration
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/20—Dihydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/20—Dihydroxylic alcohols
- C07C31/202—Ethylene glycol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/22—Trihydroxylic alcohols, e.g. glycerol
- C07C31/225—Glycerol
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/18—Polyhydroxylic acyclic alcohols
- C07C31/26—Hexahydroxylic alcohols
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Glycerol and glycols are obtained from sugar alcohols by cracking and catalytic hydrogenation of a sugar in aqueous alkaline solution, the process being carried out at a temperature in the range 200-300 DEG C. and a hydrogen pressure of 500-1000 atm. in a solution having a pH of 8-10. The pH of the solution may be adjusted by the addition of calcium hydroxide. The preferred catalyst is nickel on a carrier, for example, pumice or kieselguhr. If a temperature higher than 250 DEG C. is required it may be produced by introducing oxygen under pressure into the reaction vessel to burn some of the hydrogen. The introduction of oxygen under pressure also reduces the resinification of the catalyst. Wood sugar alcohols obtained by the hydrogenation of wood sugars may be used as starting materials. In an example, sorbitol is cracked and catalytically hydrogenated to give glycerol and glycols along with a small amount of erythritol which may be submitted again to the process.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH834771X | 1957-11-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB834771A true GB834771A (en) | 1960-05-11 |
Family
ID=4540584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34865/58A Expired GB834771A (en) | 1957-11-16 | 1958-10-30 | Improvements relating to the production of glycerol and glycols |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB834771A (en) |
-
1958
- 1958-10-30 GB GB34865/58A patent/GB834771A/en not_active Expired
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