GB2066817A - Method of obtaining concentrated solutions of formaldehyde - Google Patents

Method of obtaining concentrated solutions of formaldehyde

Info

Publication number
GB2066817A
GB2066817A GB8041317A GB8041317A GB2066817A GB 2066817 A GB2066817 A GB 2066817A GB 8041317 A GB8041317 A GB 8041317A GB 8041317 A GB8041317 A GB 8041317A GB 2066817 A GB2066817 A GB 2066817A
Authority
GB
United Kingdom
Prior art keywords
column
pressure
concentrated solutions
formaldehyde
obtaining concentrated
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.)
Withdrawn
Application number
GB8041317A
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.)
Blazhin J M
Original Assignee
Blazhin J M
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
Priority claimed from SU792753851A external-priority patent/SU1425186A1/en
Priority claimed from SU792753852A external-priority patent/SU1209679A1/en
Application filed by Blazhin J M filed Critical Blazhin J M
Publication of GB2066817A publication Critical patent/GB2066817A/en
Withdrawn legal-status Critical Current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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The method consists in carrying out the rectification process under a reduced pressure and at a minimal pressure differential in the upper section of the column and at an increased pressure in the still of the column. The pressure differential in the upper section of the column equals 3-100 mm of mercury at a pressure of 20-300 mm of mercury, whereas the pressure differential in the lower section of the column equals 0.5-2.4 atm at a pressure of 0.8-2.5 atm in the still of the column. Concentrated solutions of formaldehyde obtained with the said method can be used as raw material in liquid-phase synthesis.
GB8041317A 1979-05-04 1979-08-21 Method of obtaining concentrated solutions of formaldehyde Withdrawn GB2066817A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SU792753851A SU1425186A1 (en) 1979-05-04 1979-05-04 Method of producing high-concentration formaldehyde solutions
SU792753852A SU1209679A1 (en) 1979-05-04 1979-05-04 Method of producing highly formaldehyde aqueous solutions

Publications (1)

Publication Number Publication Date
GB2066817A true GB2066817A (en) 1981-07-15

Family

ID=26665773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8041317A Withdrawn GB2066817A (en) 1979-05-04 1979-08-21 Method of obtaining concentrated solutions of formaldehyde

Country Status (3)

Country Link
JP (1) JPS56500447A (en)
GB (1) GB2066817A (en)
WO (1) WO1980002422A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100809A1 (en) * 1982-08-02 1984-02-22 Monsanto Company Manufacture of aqueous formaldehyde

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19925870A1 (en) * 1999-06-07 2000-12-14 Basf Ag Process for converting a solution containing a mixture

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2527654A (en) * 1947-02-24 1950-10-31 Du Pont Formaldehyde concentration
US2527655A (en) * 1948-06-03 1950-10-31 Du Pont Concentration of formaldehyde
DE1928633C3 (en) * 1969-06-06 1978-03-23 Basf Ag, 6700 Ludwigshafen Process for the preparation of low-water solutions of formaldehyde
JPS4924453A (en) * 1972-06-29 1974-03-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100809A1 (en) * 1982-08-02 1984-02-22 Monsanto Company Manufacture of aqueous formaldehyde

Also Published As

Publication number Publication date
JPS56500447A (en) 1981-04-09
WO1980002422A1 (en) 1980-11-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)