BE558730A - - Google Patents
Info
- Publication number
- BE558730A BE558730A BE558730DA BE558730A BE 558730 A BE558730 A BE 558730A BE 558730D A BE558730D A BE 558730DA BE 558730 A BE558730 A BE 558730A
- Authority
- BE
- Belgium
- Prior art keywords
- glycol
- grams
- acid
- sorbic acid
- distillation
- Prior art date
Links
- 235000010199 sorbic acid Nutrition 0.000 claims description 47
- BEFDCLMNVWHSGT-UHFFFAOYSA-N ethenylcyclopentane Chemical compound C=CC1CCCC1 BEFDCLMNVWHSGT-UHFFFAOYSA-N 0.000 claims description 46
- 239000004334 sorbic acid Substances 0.000 claims description 46
- 229940075582 sorbic acid Drugs 0.000 claims description 46
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 34
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 29
- 239000000203 mixture Substances 0.000 claims description 27
- 238000004821 distillation Methods 0.000 claims description 26
- 239000002253 acid Substances 0.000 claims description 18
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 16
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 16
- LPNBBFKOUUSUDB-UHFFFAOYSA-N p-toluic acid Chemical compound CC1=CC=C(C(O)=O)C=C1 LPNBBFKOUUSUDB-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims description 12
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- 150000007513 acids Chemical class 0.000 claims description 9
- 150000001735 carboxylic acids Chemical class 0.000 claims description 9
- 150000002334 glycols Chemical class 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009835 boiling Methods 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 4
- 150000001346 alkyl aryl ethers Chemical class 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 229930195733 hydrocarbon Natural products 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000004215 Carbon black (E152) Substances 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 1
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 claims 1
- 238000000354 decomposition reaction Methods 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid group Chemical group C(C1=CC=CC=C1)(=O)O WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 9
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 9
- 229910052753 mercury Inorganic materials 0.000 description 9
- -1 aromatic monocarboxylic acid Chemical class 0.000 description 6
- 239000003208 petroleum Substances 0.000 description 5
- DPZNOMCNRMUKPS-UHFFFAOYSA-N 1,3-Dimethoxybenzene Chemical compound COC1=CC=CC(OC)=C1 DPZNOMCNRMUKPS-UHFFFAOYSA-N 0.000 description 4
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 description 4
- 239000005711 Benzoic acid Substances 0.000 description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 235000010233 benzoic acid Nutrition 0.000 description 4
- 235000010290 biphenyl Nutrition 0.000 description 4
- 239000004305 biphenyl Substances 0.000 description 4
- 125000006267 biphenyl group Chemical group 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- PGRHXDWITVMQBC-UHFFFAOYSA-N dehydroacetic acid Chemical compound CC(=O)C1C(=O)OC(C)=CC1=O PGRHXDWITVMQBC-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000009965 odorless effect Effects 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 4
- 238000000859 sublimation Methods 0.000 description 4
- 230000008022 sublimation Effects 0.000 description 4
- BGHCVCJVXZWKCC-UHFFFAOYSA-N tetradecane Chemical compound CCCCCCCCCCCCCC BGHCVCJVXZWKCC-UHFFFAOYSA-N 0.000 description 4
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 2
- GWHJZXXIDMPWGX-UHFFFAOYSA-N 1,2,4-trimethylbenzene Chemical compound CC1=CC=C(C)C(C)=C1 GWHJZXXIDMPWGX-UHFFFAOYSA-N 0.000 description 2
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 2
- WYJOVVXUZNRJQY-UHFFFAOYSA-N 2-Acetylthiophene Chemical compound CC(=O)C1=CC=CS1 WYJOVVXUZNRJQY-UHFFFAOYSA-N 0.000 description 2
- OBETXYAYXDNJHR-UHFFFAOYSA-N 2-Ethylhexanoic acid Chemical compound CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 2
- QIMMUPPBPVKWKM-UHFFFAOYSA-N 2-methylnaphthalene Chemical compound C1=CC=CC2=CC(C)=CC=C21 QIMMUPPBPVKWKM-UHFFFAOYSA-N 0.000 description 2
- PLAZTCDQAHEYBI-UHFFFAOYSA-N 2-nitrotoluene Chemical compound CC1=CC=CC=C1[N+]([O-])=O PLAZTCDQAHEYBI-UHFFFAOYSA-N 0.000 description 2
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 2
- SIKJAQJRHWYJAI-UHFFFAOYSA-N Indole Chemical compound C1=CC=C2NC=CC2=C1 SIKJAQJRHWYJAI-UHFFFAOYSA-N 0.000 description 2
- CRZQGDNQQAALAY-UHFFFAOYSA-N Methyl benzeneacetate Chemical compound COC(=O)CC1=CC=CC=C1 CRZQGDNQQAALAY-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 description 2
- YTPLMLYBLZKORZ-UHFFFAOYSA-N Thiophene Chemical compound C=1C=CSC=1 YTPLMLYBLZKORZ-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 229930016911 cinnamic acid Natural products 0.000 description 2
- 235000013985 cinnamic acid Nutrition 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- OUWSNHWQZPEFEX-UHFFFAOYSA-N diethyl glutarate Chemical compound CCOC(=O)CCCC(=O)OCC OUWSNHWQZPEFEX-UHFFFAOYSA-N 0.000 description 2
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 2
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 2
- OSWPMRLSEDHDFF-UHFFFAOYSA-N methyl salicylate Chemical compound COC(=O)C1=CC=CC=C1O OSWPMRLSEDHDFF-UHFFFAOYSA-N 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N propylene glycol Substances CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 2
- 229960004063 propylene glycol Drugs 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XEMRAKSQROQPBR-UHFFFAOYSA-N (trichloromethyl)benzene Chemical compound ClC(Cl)(Cl)C1=CC=CC=C1 XEMRAKSQROQPBR-UHFFFAOYSA-N 0.000 description 1
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1 -dodecene Natural products CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 1
- NDDJVGQZDQBORS-UHFFFAOYSA-N 1,1-dichlorododecane Chemical compound CCCCCCCCCCCC(Cl)Cl NDDJVGQZDQBORS-UHFFFAOYSA-N 0.000 description 1
- AZUYLZMQTIKGSC-UHFFFAOYSA-N 1-[6-[4-(5-chloro-6-methyl-1H-indazol-4-yl)-5-methyl-3-(1-methylindazol-5-yl)pyrazol-1-yl]-2-azaspiro[3.3]heptan-2-yl]prop-2-en-1-one Chemical compound ClC=1C(=C2C=NNC2=CC=1C)C=1C(=NN(C=1C)C1CC2(CN(C2)C(C=C)=O)C1)C=1C=C2C=NN(C2=CC=1)C AZUYLZMQTIKGSC-UHFFFAOYSA-N 0.000 description 1
- ZMXIYERNXPIYFR-UHFFFAOYSA-N 1-ethylnaphthalene Chemical compound C1=CC=C2C(CC)=CC=CC2=C1 ZMXIYERNXPIYFR-UHFFFAOYSA-N 0.000 description 1
- NVINYZLICSJRSI-UHFFFAOYSA-N 5-methyldodecane Chemical compound CCCCCCCC(C)CCCC NVINYZLICSJRSI-UHFFFAOYSA-N 0.000 description 1
- 241000238876 Acari Species 0.000 description 1
- DKMROQRQHGEIOW-UHFFFAOYSA-N Diethyl succinate Chemical compound CCOC(=O)CCC(=O)OCC DKMROQRQHGEIOW-UHFFFAOYSA-N 0.000 description 1
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical class CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000012043 crude product Substances 0.000 description 1
- XXKOQQBKBHUATC-UHFFFAOYSA-N cyclohexylmethylcyclohexane Chemical compound C1CCCCC1CC1CCCCC1 XXKOQQBKBHUATC-UHFFFAOYSA-N 0.000 description 1
- GHVNFZFCNZKVNT-UHFFFAOYSA-N decanoic acid Chemical class CCCCCCCCCC(O)=O GHVNFZFCNZKVNT-UHFFFAOYSA-N 0.000 description 1
- 150000001991 dicarboxylic acids Chemical class 0.000 description 1
- POLCUAVZOMRGSN-UHFFFAOYSA-N dipropyl ether Chemical class CCCOCCC POLCUAVZOMRGSN-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229940069096 dodecene Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- MNWFXJYAOYHMED-UHFFFAOYSA-N heptanoic acid group Chemical group C(CCCCCC)(=O)O MNWFXJYAOYHMED-UHFFFAOYSA-N 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- PZOUSPYUWWUPPK-UHFFFAOYSA-N indole Natural products CC1=CC=CC2=C1C=CN2 PZOUSPYUWWUPPK-UHFFFAOYSA-N 0.000 description 1
- RKJUIXBNRJVNHR-UHFFFAOYSA-N indolenine Natural products C1=CC=C2CC=NC2=C1 RKJUIXBNRJVNHR-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229960001047 methyl salicylate Drugs 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- UWJJYHHHVWZFEP-UHFFFAOYSA-N pentane-1,1-diol Chemical class CCCCC(O)O UWJJYHHHVWZFEP-UHFFFAOYSA-N 0.000 description 1
- SUSQOBVLVYHIEX-UHFFFAOYSA-N phenylacetonitrile Chemical compound N#CCC1=CC=CC=C1 SUSQOBVLVYHIEX-UHFFFAOYSA-N 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- ZMQAAUBTXCXRIC-UHFFFAOYSA-N safrole Chemical compound C=CCC1=CC=C2OCOC2=C1 ZMQAAUBTXCXRIC-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- WSWCOQWTEOXDQX-MQQKCMAXSA-N sorbic acid group Chemical group C(\C=C\C=C\C)(=O)O WSWCOQWTEOXDQX-MQQKCMAXSA-N 0.000 description 1
- 150000003398 sorbic acids Chemical class 0.000 description 1
- 238000001256 steam distillation Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 229940113165 trimethylolpropane Drugs 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/42—Separation; Purification; Stabilisation; Use of additives
- C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation
- C07C51/44—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE558730A true BE558730A (d) |
Family
ID=181691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE558730D BE558730A (d) |
Country Status (1)
| Country | Link |
|---|---|
| BE (1) | BE558730A (d) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1181203B (de) * | 1958-04-16 | 1964-11-12 | Hoechst Ag | Vorrichtung zur Reinigung von roher Sorbinsaeure durch Extraktion mit elektrolythaltigem Wasser |
-
0
- BE BE558730D patent/BE558730A/fr unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1181203B (de) * | 1958-04-16 | 1964-11-12 | Hoechst Ag | Vorrichtung zur Reinigung von roher Sorbinsaeure durch Extraktion mit elektrolythaltigem Wasser |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2791098B1 (fr) | Procede de purification de la vanilline par extraction liquide-liquide | |
| FR2722191A1 (fr) | Procede de preparation du trihydrate du (2r,3s)-3-tertbutoxycarbonylamino-2-hydroxy-3-phenylpropionate de 4-acetoxy2alpha-benzoyloxy-5beta,20epoxy-1,7beta,10beta trihydroxy-9-oxo-tax-11-en-13alpha-yle | |
| EP0461096B1 (fr) | Procédé de fabrication de N-phénylmaléimide | |
| WO2000066601A1 (fr) | Procede de preparation d'aloine par extraction | |
| EP0075524A1 (fr) | Procédé de carbonylation des diènes conjugués en présence d'un catalyseur au palladium avec recyclage dudit catalyseur | |
| BE558730A (d) | ||
| FR2529196A1 (fr) | Purification de phenol | |
| FR2549041A1 (fr) | Procede de purification de 4-fluorophenol | |
| EP0019531B1 (fr) | Paraformylphénolate de sodium cristallisé, son procédé de préparation et son application | |
| BE633453A (d) | ||
| EP0352168B1 (fr) | Procédé de purification de l'acide D-hydroxyphénoxypropionique | |
| FR2660656A1 (fr) | Procede pour l'isolement de l'indole et agent formant un complexe d'inclusion a utiliser dans ce procede. | |
| BE642315A (d) | ||
| BE487031A (d) | ||
| BE519868A (d) | ||
| BE622635A (d) | ||
| BE446646A (d) | ||
| BE449019A (d) | ||
| BE522565A (d) | ||
| BE702856A (d) | ||
| CH285772A (fr) | Procédé de préparation du bêta-naphtol. | |
| BE560193A (d) | ||
| CH337827A (fr) | Procédé de préparation d'un complexe cristallisable de l'aldéhyde 2,6-trans, trans de la vitamine A | |
| BE529377A (d) | ||
| BE409057A (d) |