DE221786C - - Google Patents
Info
- Publication number
- DE221786C DE221786C DENDAT221786D DE221786DA DE221786C DE 221786 C DE221786 C DE 221786C DE NDAT221786 D DENDAT221786 D DE NDAT221786D DE 221786D A DE221786D A DE 221786DA DE 221786 C DE221786 C DE 221786C
- Authority
- DE
- Germany
- Prior art keywords
- lactic acid
- pure
- gas stream
- gas
- water
- 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.)
- Active
Links
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 26
- 235000014655 lactic acid Nutrition 0.000 claims description 26
- 239000004310 lactic acid Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000004821 distillation Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000001704 evaporation Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N n-pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000002925 chemical effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004448 titration Methods 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
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE221786C true DE221786C (fr) |
Family
ID=482735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT221786D Active DE221786C (fr) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE221786C (fr) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274127A (en) * | 1990-09-18 | 1993-12-28 | Biopak Technology, Ltd. | Lactide production from dehydration of aqueous lactic acid feed |
| US5319107A (en) * | 1990-09-18 | 1994-06-07 | Biopak Technology, Ltd. | Method to produce cyclic esters |
| US5332839A (en) * | 1990-09-18 | 1994-07-26 | Biopak Technology, Ltd. | Catalytic production of lactide directly from lactic acid |
| US5420304A (en) * | 1992-03-19 | 1995-05-30 | Biopak Technology, Ltd. | Method to produce cyclic esters |
| US5675021A (en) * | 1992-03-19 | 1997-10-07 | Chronopol, Inc. | Method to produce and purify cyclic esters |
| US5686630A (en) * | 1993-09-29 | 1997-11-11 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction |
-
0
- DE DENDAT221786D patent/DE221786C/de active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5274127A (en) * | 1990-09-18 | 1993-12-28 | Biopak Technology, Ltd. | Lactide production from dehydration of aqueous lactic acid feed |
| US5319107A (en) * | 1990-09-18 | 1994-06-07 | Biopak Technology, Ltd. | Method to produce cyclic esters |
| US5332839A (en) * | 1990-09-18 | 1994-07-26 | Biopak Technology, Ltd. | Catalytic production of lactide directly from lactic acid |
| US5420304A (en) * | 1992-03-19 | 1995-05-30 | Biopak Technology, Ltd. | Method to produce cyclic esters |
| US5675021A (en) * | 1992-03-19 | 1997-10-07 | Chronopol, Inc. | Method to produce and purify cyclic esters |
| US5750732A (en) * | 1992-03-19 | 1998-05-12 | Chronopol, Inc. | Method to produce cyclic esters |
| US5856523A (en) * | 1992-03-19 | 1999-01-05 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction and further purification |
| US5686630A (en) * | 1993-09-29 | 1997-11-11 | Chronopol, Inc. | Purifying cyclic esters by aqueous solvent extraction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE1280236B (de) | Verfahren zur Reinigung von Kupfer und Vanadin enthaltenden Katalysatoren | |
| DE221786C (fr) | ||
| DE888693C (de) | Verfahren zur Herstellung von carbocyclischen Ketoximen | |
| DE2548470C2 (de) | Verfahren zur Herstellung von reinem 2,2-Bis-(4-hydroxyphenyl)-propan | |
| DE2937551C2 (de) | Verfahren zur Herstellung eines Futtermittels aus Schlempe | |
| DE1695247C3 (de) | Verfahren zur Reinigung von Lactamen durch Schmelzkristallisation | |
| DE2148717B2 (de) | Verfahren zur reinigung von rohlactamen mit 6 bis 12 kohlenstoffatomen im ring | |
| AT35865B (de) | Verfahren zur Darstellung reiner Milchsäure durch Destillation von technischer Milchsäure. | |
| DE2645777C2 (fr) | ||
| DE597305C (de) | Verfahren zur Herstellung von aliphatischen primaeren Aminosaeuren oder deren Derivaten | |
| DE965230C (de) | Verfahren zur Wiedergewinnung von Katalysatoren und Nebenprodukten aus den Mutterlaugen der Adipinsaeuregewinnung | |
| DE2624177A1 (de) | Verfahren zur herstellung von m-benzoylhydratropsaeure | |
| DE2350610C3 (de) | DL-Lithiumpantoat, D (+)-üthiumpantoat, L (-)-Lithiumpantoat und Verfahren zur Herstellung der optischen Antipoden des Pantolactons | |
| DE302826C (fr) | ||
| DE140220C (fr) | ||
| DE269701C (fr) | ||
| DE624695C (de) | Verfahren zur Herstellung von Kaliumtetraoxalat | |
| DE276489C (fr) | ||
| DE2263880B2 (de) | Hemisuccinate von dl-, d- oder 1-Allethrolon sowie deren Ephedrinsalze und Verfahren zur Aufspaltung von dl-Allethrolon | |
| DE1048567B (fr) | ||
| DE962162C (de) | Verfahren zur Herstellung von konzentrierter Ameisensaeure aus ihren Alkalisalzen | |
| DE741322C (de) | Verfahren zur Herstellung von Lactamen aus Oximen cyclischer Ketone | |
| DE268340C (fr) | ||
| DE198483C (fr) | ||
| DE221112C (fr) |