GB1381578A - Distillation of aqueous formaldehyde solutions - Google Patents

Distillation of aqueous formaldehyde solutions

Info

Publication number
GB1381578A
GB1381578A GB6016271A GB6016271A GB1381578A GB 1381578 A GB1381578 A GB 1381578A GB 6016271 A GB6016271 A GB 6016271A GB 6016271 A GB6016271 A GB 6016271A GB 1381578 A GB1381578 A GB 1381578A
Authority
GB
United Kingdom
Prior art keywords
distillation
formaldehyde
pentaerythritol
tower
aqueous formaldehyde
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
GB6016271A
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Publication of GB1381578A publication Critical patent/GB1381578A/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

Landscapes

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

Abstract

1381578 Formaldehyde; pentaerythritol MITSUI TOATSU CHEMICALS Inc 23 Dec 1971 [29 Dec 1970 (2)] 60162/71 Heading C2C Formaldehyde is recovered by the distillation of an aqueous formaldehyde solution (containing up to 30% by weight of formaldehyde in the feed) in a distillation tower to concentrate formaldehyde to a concentration of up to 60% by weight of formaldehyde at the top of the tower, the distillation being conducted under a gauge pressure of 1À5 to 20 kg/cm.<SP>2</SP> in the tower for up to 120 minutes at a pH not above 6. In the examples pentaerythritol is recovered by purification of the distillation residue, the feed solution comprising the reaction solution from a pentaerythritol synthesis.
GB6016271A 1970-12-29 1971-12-23 Distillation of aqueous formaldehyde solutions Expired GB1381578A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP12991570 1970-12-29
JP12991370 1970-12-29

Publications (1)

Publication Number Publication Date
GB1381578A true GB1381578A (en) 1975-01-22

Family

ID=26465172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6016271A Expired GB1381578A (en) 1970-12-29 1971-12-23 Distillation of aqueous formaldehyde solutions

Country Status (1)

Country Link
GB (1) GB1381578A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115784844A (en) * 2022-12-08 2023-03-14 赤峰瑞阳化工有限公司 Method for recovering formaldehyde and methanol and removing macromolecular impurities by pentaerythritol multi-tower series high-efficiency rectification

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115784844A (en) * 2022-12-08 2023-03-14 赤峰瑞阳化工有限公司 Method for recovering formaldehyde and methanol and removing macromolecular impurities by pentaerythritol multi-tower series high-efficiency rectification

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years