GB1433690A - Regeneration of salt baths - Google Patents

Regeneration of salt baths

Info

Publication number
GB1433690A
GB1433690A GB2741974A GB2741974A GB1433690A GB 1433690 A GB1433690 A GB 1433690A GB 2741974 A GB2741974 A GB 2741974A GB 2741974 A GB2741974 A GB 2741974A GB 1433690 A GB1433690 A GB 1433690A
Authority
GB
United Kingdom
Prior art keywords
biuret
isocyanic acid
diacetamide
heated
mixture
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
GB2741974A
Other languages
English (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.)
MECANIQUE ET FROTTEMENT
Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA
Original Assignee
MECANIQUE ET FROTTEMENT
Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA
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 FR7322400A external-priority patent/FR2234380A1/fr
Priority claimed from FR7416538A external-priority patent/FR2271308A2/fr
Application filed by MECANIQUE ET FROTTEMENT, Centre Stephanois de Recherches Mecaniques Hydromecanique et Frottement SA filed Critical MECANIQUE ET FROTTEMENT
Publication of GB1433690A publication Critical patent/GB1433690A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Water Treatment By Sorption (AREA)
  • Removal Of Specific Substances (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
GB2741974A 1973-06-20 1974-06-20 Regeneration of salt baths Expired GB1433690A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7322400A FR2234380A1 (en) 1973-06-20 1973-06-20 Regenerating cyanate-carbonate molten salt baths - by adding amide pretreated to liberate ammonia
FR7416538A FR2271308A2 (en) 1974-05-14 1974-05-14 Regenerating cyanate-carbonate molten salt baths - by adding amide pretreated to liberate ammonia

Publications (1)

Publication Number Publication Date
GB1433690A true GB1433690A (en) 1976-04-28

Family

ID=26217778

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2741974A Expired GB1433690A (en) 1973-06-20 1974-06-20 Regeneration of salt baths

Country Status (12)

Country Link
JP (1) JPS5068932A (fr)
AR (1) AR204533A1 (fr)
BR (1) BR7405013A (fr)
CA (1) CA1037844A (fr)
CH (1) CH593344A5 (fr)
DD (1) DD112667A5 (fr)
DE (1) DE2429679B2 (fr)
ES (1) ES427426A1 (fr)
GB (1) GB1433690A (fr)
IT (1) IT1011999B (fr)
NL (1) NL7408198A (fr)
SE (1) SE411461B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5237524A (en) * 1975-09-19 1977-03-23 Seitarou Iwasaki Method of stabilizing composition of carbonitriding salt bath
FR2556367B1 (fr) * 1983-12-09 1986-09-19 Stephanois Rech Mec Charge d'apport destinee a assurer la maintenance de bains de sels fondus pour le traitement de pieces metalliques
DE4030279C1 (en) * 1990-09-25 1992-06-04 Goetz Dipl.-Chem. Dr. 5400 Koblenz De Baum Regenerating molten alkali metal cyanate - by continuous addn. of urea] or polymer or condensate that generates urea, feeding additive into containers in continuous conveyor
DE4119820C1 (en) * 1991-06-15 1992-09-03 Goetz Dr. 5400 Koblenz De Baum Treatment of iron@ (alloys) on same support - comprises nitriding in molten alkali metal cyanate and quenching in hot aq. salt bath

Also Published As

Publication number Publication date
DE2429679B2 (de) 1978-03-09
ES427426A1 (es) 1976-09-16
BR7405013A (pt) 1976-02-17
SE411461B (sv) 1979-12-27
SE7407982L (fr) 1974-12-23
IT1011999B (it) 1977-02-10
JPS5068932A (fr) 1975-06-09
CA1037844A (fr) 1978-09-05
DE2429679A1 (de) 1975-01-09
DD112667A5 (fr) 1975-04-20
CH593344A5 (fr) 1977-11-30
BR7405013D0 (pt) 1975-01-07
AR204533A1 (es) 1976-02-12
NL7408198A (fr) 1974-12-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee