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-pantolactoneInfo
- 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
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)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD15840971A DD99368A1 (fr) | 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 (fr) |
CH (1) | CH577987A5 (fr) |
DD (1) | DD99368A1 (fr) |
DE (1) | DE2228641B2 (fr) |
FR (1) | FR2156791A1 (fr) |
HU (1) | HU164765B (fr) |
PL (1) | PL94404B1 (fr) |
RO (1) | RO64159A (fr) |
SU (1) | SU706099A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985000166A1 (fr) * | 1983-06-29 | 1985-01-17 | Union Carbide Corporation | Procede de preparation de cyanohydrines |
Families Citing this family (3)
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 |
ATE340156T1 (de) * | 2000-06-02 | 2006-10-15 | Nippon Catalytic Chem Ind | Verfahren zur herstellung von alpha- hydroxycarbonsäure |
-
1971
- 1971-10-19 DD DD15840971A patent/DD99368A1/xx unknown
-
1972
- 1972-06-13 DE DE19722228641 patent/DE2228641B2/de not_active Ceased
- 1972-10-16 RO RO7252272A patent/RO64159A/fr unknown
- 1972-10-17 HU HUJE000537 patent/HU164765B/hu unknown
- 1972-10-17 CH CH1514272A patent/CH577987A5/xx not_active IP Right Cessation
- 1972-10-18 SU SU721839389A patent/SU706099A1/ru active
- 1972-10-18 PL PL15832972A patent/PL94404B1/pl unknown
- 1972-10-18 FR FR7236898A patent/FR2156791A1/fr active Granted
-
1975
- 1975-04-25 BE BE155772A patent/BE828390Q/fr not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985000166A1 (fr) * | 1983-06-29 | 1985-01-17 | Union Carbide Corporation | Procede de preparation de cyanohydrines |
EP0132320A1 (fr) * | 1983-06-29 | 1985-01-30 | Union Carbide Corporation | Méthode de préparation de cyanohydrines |
Also Published As
Publication number | Publication date |
---|---|
DD99368A1 (fr) | 1973-08-13 |
SU706099A1 (ru) | 1979-12-30 |
FR2156791A1 (en) | 1973-06-01 |
FR2156791B1 (fr) | 1977-04-01 |
PL94404B1 (pl) | 1977-08-31 |
DE2228641B2 (de) | 1976-09-09 |
CH577987A5 (fr) | 1976-07-30 |
RO64159A (fr) | 1978-10-15 |
HU164765B (fr) | 1974-04-11 |
DE2228641A1 (de) | 1973-04-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: VEB JENAPHARM Effective date: 19840425 |