ES366991A1 - Process for working-up crude liquid vinyl acetate - Google Patents
Process for working-up crude liquid vinyl acetateInfo
- Publication number
- ES366991A1 ES366991A1 ES366991A ES366991A ES366991A1 ES 366991 A1 ES366991 A1 ES 366991A1 ES 366991 A ES366991 A ES 366991A ES 366991 A ES366991 A ES 366991A ES 366991 A1 ES366991 A1 ES 366991A1
- Authority
- ES
- Spain
- Prior art keywords
- vinyl acetate
- acetic acid
- water
- azeotropic distillation
- distillation column
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/52—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation
- C07C67/54—Separation; Purification; Stabilisation; Use of additives by change in the physical state, e.g. crystallisation by distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
- B01D3/36—Azeotropic distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/04—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds
- C07C67/05—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds with oxidation
- C07C67/055—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides onto unsaturated carbon-to-carbon bonds with oxidation in the presence of platinum group metals or their compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/62—Use of additives, e.g. for stabilisation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
In a process for the purification of crude vinyl acetate containing acetic acid, water and ethyl acetate by azeotropic distillation of the vinyl acetate and water as the head product, and phase separation of the condensate, the vinyl acetate of this condensate is partly recycled to the azeotropic distillation column in a quantity such that the sump product contains 0À5 to 6% of water and acetic acid is obtained as the sump product. In a continuous process the tail acetic acid may be recycled through an evaporator to a reaction vessel in which vinyl acetate is prepared by reacting ethylene, acetic acid, molecular oxygen in the gaseous phase over a noble metal catalyst. A reflux ratio, based on the vinyl acetate of 3 to 8 is preferred. A second azeotropic distillation stage may be used to remove final water and acetaldehyde, and polymer impurities, and acetic acid traces are removed by a final distillation. In a modification an intermediate side stream may be withdrawn from the azeotropic distillation column and combined with the sump product to pass to an evaporator before recycling to the vinyl acetate production stage. This ethyl acetate rich liquid side stream may be taken from the distillation column, e.g. between the 8th and 16th plate of a 60 plate column.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1768412A DE1768412C3 (en) | 1968-05-10 | 1968-05-10 | Process for the production of vinyl acetate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES366991A1 true ES366991A1 (en) | 1971-06-16 |
Family
ID=5699737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES366991A Expired ES366991A1 (en) | 1968-05-10 | 1969-05-09 | Process for working-up crude liquid vinyl acetate |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS5411287B1 (en) |
| AT (1) | AT292651B (en) |
| BE (1) | BE732822A (en) |
| BG (1) | BG18854A3 (en) |
| BR (1) | BR6908673D0 (en) |
| CH (1) | CH539598A (en) |
| CS (1) | CS150977B2 (en) |
| DE (1) | DE1768412C3 (en) |
| DK (1) | DK127184B (en) |
| ES (1) | ES366991A1 (en) |
| FR (1) | FR2008280A1 (en) |
| GB (1) | GB1271104A (en) |
| LU (1) | LU58600A1 (en) |
| NL (1) | NL6907165A (en) |
| NO (1) | NO131073C (en) |
| PL (1) | PL87130B1 (en) |
| RO (1) | RO55233A (en) |
| SE (1) | SE366023B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2945913A1 (en) * | 1979-11-14 | 1981-06-04 | Hoechst Ag, 6000 Frankfurt | Separating water from vinyl acetate and acetic acid mixt. - by azeotrope-former addn. and aq. phase separation |
| GB9821970D0 (en) * | 1998-10-08 | 1998-12-02 | Bp Chem Int Ltd | Process for purifying a process system |
| DE102010001097A1 (en) | 2010-01-21 | 2011-07-28 | Wacker Chemie AG, 81737 | Process for the preparation of vinyl acetate |
| US8884052B2 (en) * | 2011-12-15 | 2014-11-11 | Celanese International Corporation | Production of diacetoxyethylene by direct acetoxylation |
| KR102462860B1 (en) * | 2019-08-05 | 2022-11-03 | 라이온델바젤 아세틸, 엘엘씨 | Ethyl Acetate Removal During VAM Preparation |
-
1968
- 1968-05-10 DE DE1768412A patent/DE1768412C3/en not_active Expired
-
1969
- 1969-05-05 RO RO59887A patent/RO55233A/ro unknown
- 1969-05-07 GB GB23224/69A patent/GB1271104A/en not_active Expired
- 1969-05-08 BG BG12201A patent/BG18854A3/xx unknown
- 1969-05-08 CS CS3269*BA patent/CS150977B2/cs unknown
- 1969-05-08 LU LU58600D patent/LU58600A1/xx unknown
- 1969-05-09 NO NO1926/69A patent/NO131073C/no unknown
- 1969-05-09 JP JP3528269A patent/JPS5411287B1/ja active Pending
- 1969-05-09 CH CH715169A patent/CH539598A/en not_active IP Right Cessation
- 1969-05-09 FR FR6915119A patent/FR2008280A1/fr not_active Withdrawn
- 1969-05-09 SE SE06637/69A patent/SE366023B/xx unknown
- 1969-05-09 AT AT446269A patent/AT292651B/en not_active IP Right Cessation
- 1969-05-09 BR BR208673/69A patent/BR6908673D0/en unknown
- 1969-05-09 BE BE732822D patent/BE732822A/xx unknown
- 1969-05-09 ES ES366991A patent/ES366991A1/en not_active Expired
- 1969-05-09 DK DK254969AA patent/DK127184B/en unknown
- 1969-05-09 PL PL1969133449A patent/PL87130B1/pl unknown
- 1969-05-09 NL NL6907165A patent/NL6907165A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DK127184B (en) | 1973-10-01 |
| NL6907165A (en) | 1969-11-12 |
| SE366023B (en) | 1974-04-08 |
| GB1271104A (en) | 1972-04-19 |
| DE1768412B2 (en) | 1973-11-15 |
| BR6908673D0 (en) | 1973-01-25 |
| CS150977B2 (en) | 1973-09-17 |
| FR2008280A1 (en) | 1970-01-16 |
| RO55233A (en) | 1973-07-20 |
| BG18854A3 (en) | 1975-03-20 |
| NO131073C (en) | 1975-04-02 |
| JPS5411287B1 (en) | 1979-05-14 |
| DE1768412C3 (en) | 1974-06-06 |
| BE732822A (en) | 1969-11-10 |
| DE1768412A1 (en) | 1971-09-30 |
| LU58600A1 (en) | 1969-08-22 |
| PL87130B1 (en) | 1976-06-30 |
| NO131073B (en) | 1974-12-23 |
| CH539598A (en) | 1973-07-31 |
| AT292651B (en) | 1971-09-10 |
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