GB709576A - Improvements in the purification of trimethylol-propane - Google Patents

Improvements in the purification of trimethylol-propane

Info

Publication number
GB709576A
GB709576A GB24198/51A GB2419851A GB709576A GB 709576 A GB709576 A GB 709576A GB 24198/51 A GB24198/51 A GB 24198/51A GB 2419851 A GB2419851 A GB 2419851A GB 709576 A GB709576 A GB 709576A
Authority
GB
United Kingdom
Prior art keywords
steam
heating
pressure
crude
distilling
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
GB24198/51A
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik AG
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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB709576A publication Critical patent/GB709576A/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
    • C07C31/22—Trihydroxylic alcohols, e.g. glycerol
    • 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
    • C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
    • 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
    • C07C29/88—Separation; Purification; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification of at least one compound

Abstract

Crude trimethylol-propane, obtained by the action of formaldehyde on butyraldehyde in the presence of milk of lime or caustic alkali solution, is purified by heating it, before or after distillation, if desired with water or steam, for several hours to temperatures above 120 DEG C. under conditions under which pure trimethylolpropane remains undecomposed and undistilled. In the examples, crude trimethylolpropane is purified by (a) heating the anhydrous material for several hours to 200 DEG C. at a pressure of 200 torr; (b) heating an aqueous solution to 250 DEG C., cooling and reheating; (c) heating to 130 DEG C. in the presence of steam and steam distilling at reduced pressure; (d) steam distilling the crude material and heating the distillate to 130 DEG C. in the presence of steam; and (e) heating the anhydrous material at 200 DEG C. under a pressure of 100 torr for some hours, passing steam through at atmospheric pressure at a temperature of 130 DEG to 150 DEG C. and steam distilling the resultant mixture.
GB24198/51A 1950-10-24 1951-10-17 Improvements in the purification of trimethylol-propane Expired GB709576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE709576X 1950-10-24

Publications (1)

Publication Number Publication Date
GB709576A true GB709576A (en) 1954-05-26

Family

ID=6617882

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24198/51A Expired GB709576A (en) 1950-10-24 1951-10-17 Improvements in the purification of trimethylol-propane

Country Status (1)

Country Link
GB (1) GB709576A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930818A (en) * 1960-03-29 Process for the purification of i

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2930818A (en) * 1960-03-29 Process for the purification of i

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