DE698642C - Process for the separation of mixtures of polyhydric alcohols - Google Patents
Process for the separation of mixtures of polyhydric alcoholsInfo
- Publication number
- DE698642C DE698642C DE1937I0057663 DEI0057663D DE698642C DE 698642 C DE698642 C DE 698642C DE 1937I0057663 DE1937I0057663 DE 1937I0057663 DE I0057663 D DEI0057663 D DE I0057663D DE 698642 C DE698642 C DE 698642C
- Authority
- DE
- Germany
- Prior art keywords
- polyhydric alcohols
- mixtures
- separation
- alcohols
- xylene
- 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
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/86—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by liquid-liquid treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Trennung von Gemischen mehrwertiger Alkohole Gemische mehrwertilger Alkohole konnte man bisher nur durch Umsieden -trennen. Dies-es Verfahren ist wegen der EmpfindlicIikeit der Alkohole gegen Wärme nicht einfach durchzuführen.Process for the separation of mixtures of polyhydric alcohols mixtures So far, polyvalent alcohols could only be separated by boiling. This method is not easy to carry out because of the sensitivity of alcohols to heat.
Es wurde nun gefunden, daß man Glykol und Glycerin aus Gemischen mit höheren mehrwertigünAlkoholenabtrennen 1,ann, wenn man aus den zu trennenden Gernischen. d,.*e höheren mehrwertigen Alkohole in dcrWäriiie mit Xylo,1, Tetrahydronaphthalin, Dekahydranaphthalin, Cyclohexanon oder Methylcyclohexanon auszieht, durch Schichten vorn Gly- kol und Glycerin trennt und die mehrwertigen Alkohole durch Abk-Wilen aus dem Lösungsmittel abschei(Ict. Diese Arbeitsweise lä.ßt sich. beträchtlich einfacher durchführen als das umstündliche Umsieden. Dank- der geringen Löslichkeit des Erythrits und der anderen höheren Alkohole in den kalten Lösemitteln braucht man diese nicht abzudampfen, sondern :man kann den Erythrit usw. einfach durch Abkühlen gewinnen. Der noch in , Lösung bleibende I-',est stört bei der erneuten Verwendung des Lös,emittels für den vo.rIiegenden Zweck nicht. Am besten führt man das Lös-emittel im Kreislauf.It has now been found that glycol and glycerol can be separated from mixtures with higher polyvalent alcohols if one is made from the mixtures to be separated. d. * e higher polyhydric alcohols in dcrWäriiie with Xylo, 1, tetrahydronaphthalene, Dekahydranaphthalin, cyclohexanone or methylcyclohexanone pulls out kol by layers front Gly, separating glycerol and polyhydric alcohols by Abbr-Wilen from the solvent abschei (Ict. This procedure Can be carried out considerably more easily than the hourly reboiling. Thanks to the low solubility of the erythritol and the other higher alcohols in the cold solvents, these do not need to be evaporated, but: the erythritol, etc. can be obtained simply by cooling remaining in, solution I - 'est does not interfere with the re-use of Loes, emittels for the purpose vo.rIiegenden best leads to the Loes Eav in the circuit..
Beispi,cl Ein Gemisch aus 4o Teilen Erytlirit tind 6o Teilen Glyccrin wird nacheinander mit 5oo, 2oo und schließlich mit ioo Teilm heißem Xylol geschüttelt. Die leichtere Xyloll-ösung kann nach dem Absitzen jedesmal leicht oben abgezogen werden. Zum Schluß, bleiben 4o Teile trythritfreies Gly- cerin zuräck. Der Erythrit scheidet sich beim Abkühlen des Xylols auf io' zum größten Teil wieder aus. Der no-ch in Lösung gebliebene Rest kann durch Abdampfen des Xylo-Is gewonnen -werden; zweckmäßig verwendet man jedoch dieses Xylol für einen weiteren Arbeitsgang.For example, a mixture of 40 parts of erythritol and 60 parts of glycine is shaken in succession with 500, 200 and finally with 100 parts of hot xylene. The lighter xylene solution can be easily peeled off at the top each time it has settled. In the end, 40 parts of trythritol- free glycerin remain. Most of the erythritol is precipitated again when the xylene cools down to io '. The residue still remaining in solution can be obtained by evaporating the xylo-is; however, it is expedient to use this xylene for a further operation.
CC.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937I0057663 DE698642C (en) | 1937-04-11 | 1937-04-11 | Process for the separation of mixtures of polyhydric alcohols |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1937I0057663 DE698642C (en) | 1937-04-11 | 1937-04-11 | Process for the separation of mixtures of polyhydric alcohols |
Publications (1)
Publication Number | Publication Date |
---|---|
DE698642C true DE698642C (en) | 1940-11-14 |
Family
ID=7194609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1937I0057663 Expired DE698642C (en) | 1937-04-11 | 1937-04-11 | Process for the separation of mixtures of polyhydric alcohols |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE698642C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2503035A1 (en) * | 1975-01-25 | 1976-07-29 | Dynamit Nobel Ag | Uncontrolled discharge preventing device - has wire conductor inert to flow medium inserted in pipe or valve with point near possible discharge |
EP3019461A1 (en) * | 2013-08-19 | 2016-05-18 | REG Life Sciences, LLC | Production of partially refined waste glycerol |
-
1937
- 1937-04-11 DE DE1937I0057663 patent/DE698642C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2503035A1 (en) * | 1975-01-25 | 1976-07-29 | Dynamit Nobel Ag | Uncontrolled discharge preventing device - has wire conductor inert to flow medium inserted in pipe or valve with point near possible discharge |
EP3019461A1 (en) * | 2013-08-19 | 2016-05-18 | REG Life Sciences, LLC | Production of partially refined waste glycerol |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Beard | Whither mankind: A panorama of modern civilization | |
DE566151C (en) | Extraction of air components with a higher boiling point than oxygen | |
DE698642C (en) | Process for the separation of mixtures of polyhydric alcohols | |
DE483393C (en) | Process for the production of anhydrous chlorine magnesium | |
DE1133719B (en) | Process for the separation of acetone and other carbonyl compounds with 3C atoms from pre-purified vinyl acetate | |
EP0033849B1 (en) | Method for the recuperation of thermal energy contained in the vapours of multi-step evaporators used in thermal mass-transfer processes, and device for carrying out this method | |
DE299804C (en) | ||
DE1016690B (en) | Process for dewatering of C and higher alcohols by extractive distillation | |
DE245168C (en) | ||
DE2035859A1 (en) | Purification of thermally unstable mater- - ials eg caprolactam | |
Idowu | Assimilation in 19th century Senegal | |
DE767277C (en) | Process for the production of acetic acid | |
DE712161C (en) | Process for the separation and purification of the uterine and blood pressure acting hormones of the posterior lobe of the pituitary gland | |
DE1192639B (en) | Process for the production of acetylene and ethylene from a gas mixture resulting from the cracking of hydrocarbons | |
DE240876C (en) | ||
DE559833C (en) | Process for the separation of higher molecular weight aliphatic mono- and dicarboxylic acids | |
DE510427C (en) | Process for the saponification of esters | |
DE880294C (en) | Process for concentrating aqueous solutions of low molecular weight fatty acids | |
DE1519567A1 (en) | Method and device for the physical separation of two substances | |
DE470429C (en) | Breakdown of gas mixtures | |
DE556640C (en) | Process for dephenolating hydrocarbons containing phenol and for obtaining pure phenols | |
DE590856C (en) | Process for the separation of mixtures of acetic anhydride, acetic acid and water | |
DE1141269B (en) | Process for the production of germanium and diphenols, especially pyrocatechol, from coal tars and tea oils | |
DE850044C (en) | Process for the production of commercial paraffins from high-boiling paraffin distillates | |
DE1033181B (en) | Process for separating mixtures of substances |