GB721260A - Improvements in or relating to a process for hydrogenating reducible sugars - Google Patents
Improvements in or relating to a process for hydrogenating reducible sugarsInfo
- Publication number
- GB721260A GB721260A GB2849952A GB2849952A GB721260A GB 721260 A GB721260 A GB 721260A GB 2849952 A GB2849952 A GB 2849952A GB 2849952 A GB2849952 A GB 2849952A GB 721260 A GB721260 A GB 721260A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reactor
- rate
- hydrogen
- hydrogenation
- critical
- 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
- C07C31/26—Hexahydroxylic alcohols
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In a process for continuously hydrogenating a reducible sugar to a polyhydric alcohol by continuously feeding into the lower end of a vertical reactor a suspension of finely-divided hydrogenation catalyst in a solution of the sugar, maintaining the reactor at hydrogenating temperature, continuously feeding hydrogen under pressure into the lower end of the reactor, maintaining a selected pressure in the reactor, and continuously removing the reaction mixture from the upper end of the reactor, the rate of hydrogen feed is at least equal to the critical hydrogen rate, expressed in terms of linear feet of hydrogen flow per hour in the reactor at reactor temperature and pressure, required by the equation critical hydrogen rate = 76.5 + 0.13H where H is the rate of hydrogen usage in cubic feet per hour per square foot of reactor cross-sectional area, hydrogen volume being expressed in terms of one atmosphere pressure and 0 DEG C. Hydrogenation may be effected in a series of reactors and conditions are so arranged that hydrogenation to the maximum extent possible is achieved in the first reactor. The "critical hydrogen rate" is the lowest rate of hydrogen feed which will give the greatest extent of hydrogenation possible under the existing conditions. The rate adopted should be somewhat higher than the critical rate to ensure maximum hydrogenation. In examples: (1) and (2) sorbitol is obtained from glucose; (3) sorbitol and mannitol from inverted sucrose; and (4) lactositol from lactose by hydrogenation in the presence of a supported reduced nickel catalyst at temperatures of about 150-165 DEG C. and pressures of 1000-2000 p.s.i.g., an equation being given for the calculation of the rate of hydrogen usage.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2849952A GB721260A (en) | 1952-11-12 | 1952-11-12 | Improvements in or relating to a process for hydrogenating reducible sugars |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2849952A GB721260A (en) | 1952-11-12 | 1952-11-12 | Improvements in or relating to a process for hydrogenating reducible sugars |
Publications (1)
Publication Number | Publication Date |
---|---|
GB721260A true GB721260A (en) | 1955-01-05 |
Family
ID=10276605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2849952A Expired GB721260A (en) | 1952-11-12 | 1952-11-12 | Improvements in or relating to a process for hydrogenating reducible sugars |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB721260A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109305882A (en) * | 2018-09-28 | 2019-02-05 | 吉林省石油化工设计研究院 | A kind of glucose continuously hydrogen adding prepares the method and device of sorbierite |
-
1952
- 1952-11-12 GB GB2849952A patent/GB721260A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109305882A (en) * | 2018-09-28 | 2019-02-05 | 吉林省石油化工设计研究院 | A kind of glucose continuously hydrogen adding prepares the method and device of sorbierite |
CN109305882B (en) * | 2018-09-28 | 2023-12-19 | 吉林省石油化工设计研究院 | Method and device for preparing sorbitol by continuous hydrogenation of glucose |
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