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FR2211269A1 - Recovery of dimethyl formamide - from impure aqueous solutions contg. solids and colouring matter - Google Patents

Recovery of dimethyl formamide - from impure aqueous solutions contg. solids and colouring matter

Info

Publication number
FR2211269A1
FR2211269A1 FR7245789A FR7245789A FR2211269A1 FR 2211269 A1 FR2211269 A1 FR 2211269A1 FR 7245789 A FR7245789 A FR 7245789A FR 7245789 A FR7245789 A FR 7245789A FR 2211269 A1 FR2211269 A1 FR 2211269A1
Authority
FR
France
Prior art keywords
contg
solids
dimethyl formamide
colouring matter
recovery
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.)
Granted
Application number
FR7245789A
Other languages
French (fr)
Other versions
FR2211269B1 (en
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.)
Akzo NV
Original Assignee
Akzo NV
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 Akzo NV filed Critical Akzo NV
Priority to FR7245789A priority Critical patent/FR2211269A1/en
Publication of FR2211269A1 publication Critical patent/FR2211269A1/en
Application granted granted Critical
Publication of FR2211269B1 publication Critical patent/FR2211269B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping

Landscapes

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

Abstract

Mixtures of solvents contg. solids, and having differing b.pts. esp. aq. solns. of dimethyl formamide (DMF), discharged hot from an industrial process are concentrated by maintaining the temp. of the soln. whilst filtering to remove solid or liquid residues and colouring matter, then distilling the filtrate under reduced pressure using a vessel with a suitable rectification column to remove part or all the water and condensing the water which advantageously may be recycled to the DMF/H2O user process.
FR7245789A 1972-12-21 1972-12-21 Recovery of dimethyl formamide - from impure aqueous solutions contg. solids and colouring matter Granted FR2211269A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7245789A FR2211269A1 (en) 1972-12-21 1972-12-21 Recovery of dimethyl formamide - from impure aqueous solutions contg. solids and colouring matter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7245789A FR2211269A1 (en) 1972-12-21 1972-12-21 Recovery of dimethyl formamide - from impure aqueous solutions contg. solids and colouring matter

Publications (2)

Publication Number Publication Date
FR2211269A1 true FR2211269A1 (en) 1974-07-19
FR2211269B1 FR2211269B1 (en) 1976-04-23

Family

ID=9109138

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7245789A Granted FR2211269A1 (en) 1972-12-21 1972-12-21 Recovery of dimethyl formamide - from impure aqueous solutions contg. solids and colouring matter

Country Status (1)

Country Link
FR (1) FR2211269A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115400436A (en) * 2022-09-01 2022-11-29 江苏宜宝设备制造有限公司 DMF recycling liquid recycling system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568405A (en) * 1969-05-07 1971-03-09 Portable Treaters Inc Filtration method and apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3568405A (en) * 1969-05-07 1971-03-09 Portable Treaters Inc Filtration method and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115400436A (en) * 2022-09-01 2022-11-29 江苏宜宝设备制造有限公司 DMF recycling liquid recycling system
CN115400436B (en) * 2022-09-01 2024-02-27 江苏宜宝设备制造有限公司 DMF recovery liquid recycling system

Also Published As

Publication number Publication date
FR2211269B1 (en) 1976-04-23

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Legal Events

Date Code Title Description
ST Notification of lapse