FR2134663A1 - - Google Patents
Info
- Publication number
- FR2134663A1 FR2134663A1 FR7215286A FR7215286A FR2134663A1 FR 2134663 A1 FR2134663 A1 FR 2134663A1 FR 7215286 A FR7215286 A FR 7215286A FR 7215286 A FR7215286 A FR 7215286A FR 2134663 A1 FR2134663 A1 FR 2134663A1
- Authority
- FR
- France
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
- C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
-
- 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
- C07C51/46—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation by distillation by azeotropic distillation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S203/00—Distillation: processes, separatory
- Y10S203/22—Accessories
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2121123A DE2121123C3 (de) | 1971-04-29 | 1971-04-29 | Verfahren zum Abtrennen von Wasser aus wäßrigen Lösungen von Acrylsäure durch azeotrope Destillation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2134663A1 true FR2134663A1 (US20020125480A1-20020912-P00900.png) | 1972-12-08 |
| FR2134663B1 FR2134663B1 (US20020125480A1-20020912-P00900.png) | 1976-06-11 |
Family
ID=5806374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7215286A Expired FR2134663B1 (US20020125480A1-20020912-P00900.png) | 1971-04-29 | 1972-04-28 |
Country Status (7)
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040913A (en) * | 1975-09-02 | 1977-08-09 | Rohm And Haas Company | Recovery of methacrylic acid from the effluent obtained from the condensation of formaldehyde and propionic acid |
| BE875237R (fr) * | 1978-07-18 | 1979-07-16 | Cosden Technology | Procede pour inhiber la polymerisation de composes vinylaromatiques facilement polymerisables |
| GB2146636B (en) * | 1983-08-11 | 1987-02-04 | Nippon Catalytic Chem Ind | Process for producing acrylic acid |
| US4599144A (en) * | 1984-06-25 | 1986-07-08 | Standard Oil Company (Indiana) | Process for recovery of methacrylic acid |
| US5728872A (en) * | 1994-06-27 | 1998-03-17 | Lutz Riemenschneider | Stabilized acrylic acid compositions |
| JP3937462B2 (ja) * | 1994-08-04 | 2007-06-27 | 三菱化学株式会社 | アクリル酸精製法 |
| DE69511095T2 (de) * | 1994-08-23 | 2000-04-06 | E.I. Du Pont De Nemours And Co. | Dehydratisierung der essigsäure durch azeotropische destillation in der herstellung von aromatischen säure |
| TW524796B (en) * | 1997-11-17 | 2003-03-21 | Sumitomo Chemical Co | Method for producing acrylic acid |
| DE19814449A1 (de) | 1998-03-31 | 1999-10-07 | Basf Ag | Verfahren zur Herstellung von (Meth)acrylsäure und (Meth)acrylsäureestern |
| DE19814375A1 (de) | 1998-03-31 | 1999-10-07 | Basf Ag | Verfahren zur Herstellung von Acrylsäure und Acrylsäureestern |
| DE19814387A1 (de) | 1998-03-31 | 1999-10-07 | Basf Ag | Verfahren zur Herstellung von Acrylsäure und Acrylsäureestern |
| US6150553A (en) * | 1998-08-11 | 2000-11-21 | E. I. Du Pont De Nemours And Company | Method for recovering methyl acetate and residual acetic acid in the production acid of pure terephthalic acid |
| DE10036958A1 (de) * | 2000-07-28 | 2002-02-07 | Basf Ag | Verfahren zur Herstellung von tert.-C4-C8-Alkylestern der (Meth)acrylsäure |
| US7128813B2 (en) * | 2002-05-01 | 2006-10-31 | Rohm And Haas Company | Process for manufacturing high purity methacrylic acid |
| US9149736B2 (en) * | 2012-12-13 | 2015-10-06 | Invista North America S.A.R.L. | Dehydration of acetic acid by azeotropic distillation in the production of an aromatic acid |
| FR3089222A1 (fr) * | 2018-11-29 | 2020-06-05 | Arkema France | Purification de solutions aqueuses contenant du formaldehyde, et utilisation de la solution purifiee dans un procede de production d’acide acrylique |
| CN113788751B (zh) * | 2021-08-12 | 2023-10-13 | 万华化学(四川)有限公司 | 一种乙酸芳樟酯生产中副产物乙酸的纯化方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2936267A (en) * | 1955-11-18 | 1960-05-10 | Farbwerke Hocchst Ag Vormals M | Process for purifying carboxylic acids |
| US3527677A (en) * | 1969-03-06 | 1970-09-08 | Goodrich Co B F | Process for dehydration of aqueous acrylic acid solutions by extractive - azeotropic distillation with 2-ethylhexanol or 2-ethylhexylacrylate |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3470238A (en) * | 1964-11-06 | 1969-09-30 | Mitsubishi Petrochemical Co | Process for recovering acrylic and methacrylic ester |
| DE1518721A1 (de) * | 1965-09-09 | 1969-06-12 | Dynamit Nobel Ag | Verfahren zur Gewinnung wasserloeslicher ungesaettigter Karbonsaeuren aus waessrigen Loesungen |
| US3555082A (en) * | 1966-12-15 | 1971-01-12 | Knapsack Ag | Process for isolating acrylic acid from the reaction gases obtained by oxidation of propylene or acrolein |
| DE1805758C3 (de) * | 1968-10-29 | 1974-07-18 | Knapsack Ag, 5033 Huerth-Knapsack | Verfahren zur Abtrennung von Acrylsäure aus wäßriger Rohacrylsäure |
-
1971
- 1971-04-29 DE DE2121123A patent/DE2121123C3/de not_active Expired
-
1972
- 1972-04-25 NL NL7205590A patent/NL7205590A/xx not_active Application Discontinuation
- 1972-04-27 US US00248169A patent/US3844903A/en not_active Expired - Lifetime
- 1972-04-28 FR FR7215286A patent/FR2134663B1/fr not_active Expired
- 1972-04-28 IT IT49932/72A patent/IT952815B/it active
- 1972-04-28 BE BE782800A patent/BE782800A/xx unknown
- 1972-04-28 GB GB1977072A patent/GB1378716A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2936267A (en) * | 1955-11-18 | 1960-05-10 | Farbwerke Hocchst Ag Vormals M | Process for purifying carboxylic acids |
| US3527677A (en) * | 1969-03-06 | 1970-09-08 | Goodrich Co B F | Process for dehydration of aqueous acrylic acid solutions by extractive - azeotropic distillation with 2-ethylhexanol or 2-ethylhexylacrylate |
Also Published As
| Publication number | Publication date |
|---|---|
| US3844903A (en) | 1974-10-29 |
| DE2121123C3 (de) | 1980-06-12 |
| BE782800A (fr) | 1972-10-30 |
| NL7205590A (US20020125480A1-20020912-P00900.png) | 1972-10-31 |
| DE2121123B2 (de) | 1979-10-04 |
| FR2134663B1 (US20020125480A1-20020912-P00900.png) | 1976-06-11 |
| DE2121123A1 (US20020125480A1-20020912-P00900.png) | 1972-11-16 |
| GB1378716A (en) | 1974-12-27 |
| IT952815B (it) | 1973-07-30 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |