GB834771A - Improvements relating to the production of glycerol and glycols - Google Patents

Improvements relating to the production of glycerol and glycols

Info

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
Application number
GB34865/58A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Publication of GB834771A publication Critical patent/GB834771A/en
Expired legal-status Critical Current

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.
GB34865/58A 1957-11-16 1958-10-30 Improvements relating to the production of glycerol and glycols Expired GB834771A (en)

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)

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