GB1032355A - Concentrating solutions of hydrazine, hydrazones and azines - Google Patents

Concentrating solutions of hydrazine, hydrazones and azines

Info

Publication number
GB1032355A
GB1032355A GB19934/62A GB1993462A GB1032355A GB 1032355 A GB1032355 A GB 1032355A GB 19934/62 A GB19934/62 A GB 19934/62A GB 1993462 A GB1993462 A GB 1993462A GB 1032355 A GB1032355 A GB 1032355A
Authority
GB
United Kingdom
Prior art keywords
zone
permeate
hydrazone
hydrazine
feed zone
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
GB19934/62A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB19934/62A priority Critical patent/GB1032355A/en
Publication of GB1032355A publication Critical patent/GB1032355A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
    • B01D61/362—Pervaporation
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/16—Hydrazine; Salts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/02—Specific process operations before starting the membrane separation process

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Aqueous solutions of hydrazine are changed in concentration by introducing mixtures thereof with an aldehyde or ketone or by introducing the aqueous solution of hydrazone or azine resulting from the reaction of said hydrazine with said aldehyde or ketone into the feed zone of a permeation apparatus comprising a feed zone separated from a permeate zone by a membrane, recovering from said feed zone a mixture enriched in the hydrazone or azine, recovering from said permeate zone a mixture depleted in the hydrazone or azine, and hydrolysing the hydrazone or azine solution recovered from the feed zone to obtain a solution of hydrazine of increased concentration. Before hydrolysis the mixture recovered from the feed zone may be fed to the feed zones of one or more further permeation apparatus. The permeate zone is preferably maintained at a pressure less than the vapour pressure of the permeate vapour. Suitable membranes are made from cellulose acetate, regenerated cellulose, polyvinyl chloride and polyacrylonitrile, preferably pretreated with aqueous hydrazine. Suitable hydrazones and azines are those derived from acetone, methyl ethyl ketone, sulpholanyl ketones, acetaldehyde, propionaldehyde and benzaldehyde.ALSO:Aqueous solutions of hydrazones or azimes are changed in concentration by introducing them into the feed zone of a permeation apparatus comprising a feed zone separated from a permeate zone by a membrane, recovering from said feed zone a mixture enriched in the hydrazone or azime and recovering from said permeate zone a mixture depleted in the hydrazone or azine. The mixture recovered from the feed zone may be fed to the feed zones of one or more further permeation apparatus. The permeate zone is preferably maintained at pressure less than the vapour pressure of the permeate vapour. Suitable membranes are made from cellulose acetate, regenerated cellulose, polyvinyl chloride and polyacrylonitrile, preferably pre-treated with aqueous hydrazine. Suitable hydrazones and azines are those derived from acetone, methyl ethyl ketone, sulpholanyl ketones, acetaldehyde, propionaldehyde and benzaldehyde.
GB19934/62A 1962-05-24 1962-05-24 Concentrating solutions of hydrazine, hydrazones and azines Expired GB1032355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB19934/62A GB1032355A (en) 1962-05-24 1962-05-24 Concentrating solutions of hydrazine, hydrazones and azines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19934/62A GB1032355A (en) 1962-05-24 1962-05-24 Concentrating solutions of hydrazine, hydrazones and azines

Publications (1)

Publication Number Publication Date
GB1032355A true GB1032355A (en) 1966-06-08

Family

ID=10137568

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19934/62A Expired GB1032355A (en) 1962-05-24 1962-05-24 Concentrating solutions of hydrazine, hydrazones and azines

Country Status (1)

Country Link
GB (1) GB1032355A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013834A2 (en) * 1978-12-28 1980-08-06 Exxon Research And Engineering Company Method of converting a hydrophilic, water-containing regenerated cellulose membrane to a membrane useful for separating organic liquids
US4368112A (en) 1978-12-28 1983-01-11 Exxon Research And Engineering Co. Solvent recovery from foots oil using modified regenerated cellulose membranes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0013834A2 (en) * 1978-12-28 1980-08-06 Exxon Research And Engineering Company Method of converting a hydrophilic, water-containing regenerated cellulose membrane to a membrane useful for separating organic liquids
EP0013834A3 (en) * 1978-12-28 1981-01-14 Exxon Research And Engineering Company Method of converting a hydrophilic, water-containing regenerated cellulose membrane to a membrane useful for separating organic liquids, and membrane made by such a method
US4368112A (en) 1978-12-28 1983-01-11 Exxon Research And Engineering Co. Solvent recovery from foots oil using modified regenerated cellulose membranes

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