NL6916439A - - Google Patents

Info

Publication number
NL6916439A
NL6916439A NL6916439A NL6916439A NL6916439A NL 6916439 A NL6916439 A NL 6916439A NL 6916439 A NL6916439 A NL 6916439A NL 6916439 A NL6916439 A NL 6916439A NL 6916439 A NL6916439 A NL 6916439A
Authority
NL
Netherlands
Prior art keywords
separated
mixture
crystals
melt
binary
Prior art date
Application number
NL6916439A
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 filed Critical
Publication of NL6916439A publication Critical patent/NL6916439A/xx

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/16—Separation; Purification; Stabilisation; Use of additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D205/00—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom
    • C07D205/02—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D205/06—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D205/08—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

1,273,278. Separation of binary mixtures. FARBWERKE HOECHST A.G. 7 Nov., 1969 [7 Nov., 1968], No. 54707/69. Heading C2C. Components of a binary mixture (except a binary mixture forming mixed crystals and/or congruently or incongruently melting solid phases) having a minimum melting point in the range -100 to +150‹ C. and a composition falling between the extrapolated branches of the melting point curve, are separated by inoculating an homogeneous melt of the binary mixture with crystals of one of the components at a temperature which is in the range of from 0À05 to 15‹ C. below the eutectic temperature, allowing this component to selectively crystallize until the melt contains substantially less of this component than the eutectic mixture and separating the crystals from the melt. In examples (1) ortho and para chloronitrobenzene are separated from each other and (2) enantiomers of a #-lactam of formula where R 1 is alkyl C 1-5 , vinyl or phenyl, R 2 and R 3 are each hydrogen, methyl or together form an alkylene C 3-5 ring with the proviso that if R 1 =R 2 , R 3 is not hydrogen are separated from the racemic mixture.
NL6916439A 1968-11-07 1969-10-31 NL6916439A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681807495 DE1807495A1 (en) 1968-11-07 1968-11-07 Process for the separation of binary mixtures

Publications (1)

Publication Number Publication Date
NL6916439A true NL6916439A (en) 1970-05-11

Family

ID=5712617

Family Applications (1)

Application Number Title Priority Date Filing Date
NL6916439A NL6916439A (en) 1968-11-07 1969-10-31

Country Status (5)

Country Link
BE (1) BE741422A (en)
DE (1) DE1807495A1 (en)
FR (1) FR2022807A1 (en)
GB (1) GB1273278A (en)
NL (1) NL6916439A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536827A1 (en) * 1995-10-02 1997-04-03 Basf Ag Method and device for separating liquid eutectic mixtures by crystallization on cooling surfaces
GB9907415D0 (en) * 1999-03-31 1999-05-26 Chirotech Technology Ltd Biocatalyst and its use
EP2292306B1 (en) * 2009-09-02 2013-05-01 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Method for separation of racemic compound-forming chiral substances by a cyclic crystallization process and a crystallization device

Also Published As

Publication number Publication date
FR2022807A1 (en) 1970-08-07
GB1273278A (en) 1972-05-03
DE1807495A1 (en) 1970-06-11
BE741422A (en) 1970-05-08

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