GB989801A - Process for the production of anhydrous formaldehyde - Google Patents

Process for the production of anhydrous formaldehyde

Info

Publication number
GB989801A
GB989801A GB2858361A GB2858361A GB989801A GB 989801 A GB989801 A GB 989801A GB 2858361 A GB2858361 A GB 2858361A GB 2858361 A GB2858361 A GB 2858361A GB 989801 A GB989801 A GB 989801A
Authority
GB
United Kingdom
Prior art keywords
trimethylol
hemiacetal
formaldehyde
propane
alcohol
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
GB2858361A
Inventor
Helmut Pobloth
Werner Winzer
Isolde Winkler
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.)
Leuna Werke GmbH
Original Assignee
Leuna Werke GmbH
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 Leuna Werke GmbH filed Critical Leuna Werke GmbH
Priority to GB2858361A priority Critical patent/GB989801A/en
Priority to FR870456A priority patent/FR1301078A/en
Publication of GB989801A publication Critical patent/GB989801A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/78—Separation; Purification; Stabilisation; Use of additives
    • C07C45/81—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
    • C07C45/82—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/51—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition
    • C07C45/511—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition involving transformation of singly bound oxygen functional groups to >C = O groups
    • C07C45/515—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by pyrolysis, rearrangement or decomposition involving transformation of singly bound oxygen functional groups to >C = O groups the singly bound functional group being an acetalised, ketalised hemi-acetalised, or hemi-ketalised hydroxyl group
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/78—Separation; Purification; Stabilisation; Use of additives
    • C07C45/85—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Substantially anhydrous, monomeric formaldehyde is produced by reacting an aqueous formaldehyde solution with an alcohol which contains at least three hydroxyl groups in the molecule and which has been obtained by condensation of an aliphatic aldehyde with formaldehyde, dehydrating the resulting hemiacetal-water mixture by distillation, and subsequently thermally decomposing the hemiacetal into formaldehyde gas and said alcohol, and recovering the formaldehyde thus obtained. Alcohols specified for forming the hemiacetal are 1,1,1 - trimethylol - ethane, 1,1,1 - trimethylol - propane, 1,1,1 - trimethylol - butane, 1,1,1 - trimethylol - 2 - hydroxypropane and pentaerythritol. The dehydration of the hemiacetal-water mixture is preferably carried out in a vacuum of 15 to 25 mm. Hg and may be effected discontinuously or continuously. The thermal decomposition of the hemiacetate may also be discontinuous or continuous and with the hemiacetal of 1,1,1-trimethylol-propane, for example, may be effected at a temperature of 140 DEG to 180 DEG C.
GB2858361A 1961-08-08 1961-08-08 Process for the production of anhydrous formaldehyde Expired GB989801A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2858361A GB989801A (en) 1961-08-08 1961-08-08 Process for the production of anhydrous formaldehyde
FR870456A FR1301078A (en) 1961-08-08 1961-08-09 Anhydrous formaldehyde manufacturing process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2858361A GB989801A (en) 1961-08-08 1961-08-08 Process for the production of anhydrous formaldehyde

Publications (1)

Publication Number Publication Date
GB989801A true GB989801A (en) 1965-04-22

Family

ID=10277904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2858361A Expired GB989801A (en) 1961-08-08 1961-08-08 Process for the production of anhydrous formaldehyde

Country Status (1)

Country Link
GB (1) GB989801A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543226A2 (en) * 1991-11-16 1993-05-26 BASF Aktiengesellschaft Process for the preparation of anhydrous and from impurities depleted formaldehyde
CN114057543A (en) * 2020-07-29 2022-02-18 山东辰信新能源有限公司 Recovery method of ineffective carrier in DMMn synthesis process

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0543226A2 (en) * 1991-11-16 1993-05-26 BASF Aktiengesellschaft Process for the preparation of anhydrous and from impurities depleted formaldehyde
EP0543226A3 (en) * 1991-11-16 1993-06-30 Basf Aktiengesellschaft Process for the preparation of anhydrous and from impurities depleted formaldehyde
CN114057543A (en) * 2020-07-29 2022-02-18 山东辰信新能源有限公司 Recovery method of ineffective carrier in DMMn synthesis process
CN114057543B (en) * 2020-07-29 2023-09-15 山东辰信新能源有限公司 Recovery method of failure carrier in DMMn synthesis process

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