BE828390Q - Procede et installation pour la preparation en continu de la di-alpha-hydroxy beta, beta-dimethyl-alpha-butyrolactone (dl-pantolactone - Google Patents

Procede et installation pour la preparation en continu de la di-alpha-hydroxy beta, beta-dimethyl-alpha-butyrolactone (dl-pantolactone

Info

Publication number
BE828390Q
BE828390Q BE155772A BE155772A BE828390Q BE 828390 Q BE828390 Q BE 828390Q BE 155772 A BE155772 A BE 155772A BE 155772 A BE155772 A BE 155772A BE 828390 Q BE828390 Q BE 828390Q
Authority
BE
Belgium
Prior art keywords
alpha
beta
pantolactone
butyrolactone
dimethyl
Prior art date
Application number
BE155772A
Other languages
English (en)
French (fr)
Inventor
J Schmidt
W Bamberg
H Grunert
E Schorm
C Weigelt
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
Application granted granted Critical
Publication of BE828390Q publication Critical patent/BE828390Q/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
    • C07D307/26—Heterocyclic compounds containing five-membered rings having one oxygen 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
    • C07D307/30—Heterocyclic compounds containing five-membered rings having one oxygen 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 hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D307/32—Oxygen atoms
    • C07D307/33—Oxygen atoms in position 2, the oxygen atom being in its keto or unsubstituted enol form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/2415—Tubular reactors
    • B01J19/2435—Loop-type reactors
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C255/00—Carboxylic acid nitriles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/08—Preparation of carboxylic acids or their salts, halides or anhydrides from nitriles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
BE155772A 1971-10-19 1975-04-25 Procede et installation pour la preparation en continu de la di-alpha-hydroxy beta, beta-dimethyl-alpha-butyrolactone (dl-pantolactone BE828390Q (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD15840971A DD99368A1 (enrdf_load_stackoverflow) 1971-10-19 1971-10-19

Publications (1)

Publication Number Publication Date
BE828390Q true BE828390Q (fr) 1975-08-18

Family

ID=5484467

Family Applications (1)

Application Number Title Priority Date Filing Date
BE155772A BE828390Q (fr) 1971-10-19 1975-04-25 Procede et installation pour la preparation en continu de la di-alpha-hydroxy beta, beta-dimethyl-alpha-butyrolactone (dl-pantolactone

Country Status (9)

Country Link
BE (1) BE828390Q (enrdf_load_stackoverflow)
CH (1) CH577987A5 (enrdf_load_stackoverflow)
DD (1) DD99368A1 (enrdf_load_stackoverflow)
DE (1) DE2228641B2 (enrdf_load_stackoverflow)
FR (1) FR2156791A1 (enrdf_load_stackoverflow)
HU (1) HU164765B (enrdf_load_stackoverflow)
PL (1) PL94404B1 (enrdf_load_stackoverflow)
RO (1) RO64159A (enrdf_load_stackoverflow)
SU (1) SU706099A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000166A1 (en) * 1983-06-29 1985-01-17 Union Carbide Corporation Process for preparation of cyanohydrins

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2758883C3 (de) * 1977-12-30 1981-10-08 Basf Ag, 6700 Ludwigshafen Verfahren zur kontinuierlichen Herstellung von α-Hydroxy-β,β-dimethyl-γ-butyrolacton
DE2809179A1 (de) * 1978-03-03 1979-09-13 Basf Ag Verfahren zur extraktion von pantolacton aus seinen waessrigen loesungen
GB9210832D0 (en) * 1992-05-21 1992-07-08 Ici Plc Bromine catalysed oxidation process
DE60123167T2 (de) 2000-06-02 2007-09-13 Nippon Shokubai Co. Ltd. Verfahren zur Herstellung von alpha-Hydroxycarbonsäure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000166A1 (en) * 1983-06-29 1985-01-17 Union Carbide Corporation Process for preparation of cyanohydrins
EP0132320A1 (en) * 1983-06-29 1985-01-30 Union Carbide Corporation Method of preparing cyanohydrins

Also Published As

Publication number Publication date
FR2156791A1 (en) 1973-06-01
HU164765B (enrdf_load_stackoverflow) 1974-04-11
SU706099A1 (ru) 1979-12-30
DD99368A1 (enrdf_load_stackoverflow) 1973-08-13
FR2156791B1 (enrdf_load_stackoverflow) 1977-04-01
RO64159A (fr) 1978-10-15
CH577987A5 (enrdf_load_stackoverflow) 1976-07-30
DE2228641A1 (de) 1973-04-26
DE2228641B2 (de) 1976-09-09
PL94404B1 (pl) 1977-08-31

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: VEB JENAPHARM

Effective date: 19840425