GB430576A - Improvements in or relating to the manufacture of glycerol and glycols - Google Patents

Improvements in or relating to the manufacture of glycerol and glycols

Info

Publication number
GB430576A
GB430576A GB35971/33A GB3597133A GB430576A GB 430576 A GB430576 A GB 430576A GB 35971/33 A GB35971/33 A GB 35971/33A GB 3597133 A GB3597133 A GB 3597133A GB 430576 A GB430576 A GB 430576A
Authority
GB
United Kingdom
Prior art keywords
glycerol
alcohols
sugar
separated
nickel
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
GB35971/33A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB430576A publication Critical patent/GB430576A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C07C29/09—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis
    • C07C29/10—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of ethers, including cyclic ethers, e.g. oxiranes
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Glycerol-glycols are obtained from polyhydric alcohols having a greater number of carbon atoms, e.g. the sugar alcohols by treatment with hydrogen at a temperature of 200--300 DEG C. and a pressure of at least 70 atmospheres, preferably 200--270 atmospheres in the presence of a hydrogenating catalyst and of a weakly basic buffer compound. The sugar alcohol may be produced in situ by using a monosaccharide as the initial material and initially reducing this to the corresponding hexitol at a lower temperature and pressure. The catalyst may be separated after the first stage reduction to a hexitol, the second stage reduction being carried out with fresh catalyst and a weakly basic buffer compound. The monosaccharide may be produced by the hydrolysis of a polysaccharide. The initial materials referred to include alcohols such as sorbitol, dulcitol, mannitol, xylitol, monosaccharides such as glucose, fructose, xylose, mannose, arabinose, rhamnose, and polysaccharides such as cane sugar, maltose, lactose, starch, and cellulose. The weakly basic buffer compounds referred to are calcium or other alkaline earth metal carbonates, borax, aluminium hydroxide, and sodium carbonate. Suitable catalysts include reduced nickel or cobalt, particularly highly reduced nickel, which may be supported on an inert carrier, nickel chromite, alumina containing metallic nickel, and copper-zinc compositions such as prepared by heating mixtures of compounds containing zinc, copper and hexavalent chromium. The reaction is preferably conducted in aqueous solution, but solutions or suspensions in alcohol, propylene glycol, &c., may be used. The process may also be conducted in the absence of solvent or dispersing agent. When reducing the sugar alcohols in aqueous solution a glycerine of higher purity is obtained by using relatively dilute solutions. After the reaction water can be removed from the product by distillation and glycerol can be separated from the mixture of ethylene and propylene glycols also obtained by fractional distillation. The glycol fraction may be separated by further distillation. The glycerol obtained is preferably purified by extraction with a solvent such as chloroform, ether or carbon tetrachloride. The extracted impurities may be utilized for out-freeze mixtures. The Specification as open to inspection under Sect. 91 comprises also the general application of the above process for the manufacture of lower polyhydric alcohols from polyhydric alcohols having a greater number of hydroxyl groups and refers to "decalin" as a suitable solvent in which to conduct the reaction. This subject-matter does not appear in the Specification as accepted.
GB35971/33A 1932-12-23 1933-12-21 Improvements in or relating to the manufacture of glycerol and glycols Expired GB430576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US430576XA 1932-12-23 1932-12-23

Publications (1)

Publication Number Publication Date
GB430576A true GB430576A (en) 1935-06-21

Family

ID=21925231

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35971/33A Expired GB430576A (en) 1932-12-23 1933-12-21 Improvements in or relating to the manufacture of glycerol and glycols

Country Status (1)

Country Link
GB (1) GB430576A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977291A (en) * 1958-02-10 1961-03-28 Atlas Powder Co Purification of glycerol
EP0523015A2 (en) * 1991-07-10 1993-01-13 NOVAMONT S.p.A. A method of hydrogenating glycerol
EP0854149A1 (en) * 1997-01-17 1998-07-22 Südzucker Aktiengesellschaft Mannheim/Ochsenfurt Process for the hydrogenation of sugars using a shell type catalyst
WO2006092085A1 (en) * 2005-03-01 2006-09-08 Global Polyol Investments Limited A process for producing dihydroxy alcohol and polyol by cracking sorbitol

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2977291A (en) * 1958-02-10 1961-03-28 Atlas Powder Co Purification of glycerol
EP0523015A2 (en) * 1991-07-10 1993-01-13 NOVAMONT S.p.A. A method of hydrogenating glycerol
EP0523015A3 (en) * 1991-07-10 1993-05-26 Novamont Spa A method of hydrogenating glycerol
EP0854149A1 (en) * 1997-01-17 1998-07-22 Südzucker Aktiengesellschaft Mannheim/Ochsenfurt Process for the hydrogenation of sugars using a shell type catalyst
US5936081A (en) * 1997-01-17 1999-08-10 Sudzucker Aktiengesellschaft Process for the hydrogenation of sugars using a shell catalyst
WO2006092085A1 (en) * 2005-03-01 2006-09-08 Global Polyol Investments Limited A process for producing dihydroxy alcohol and polyol by cracking sorbitol

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