JPS593463B2 - Dimethyl carbonate recovery method - Google Patents
Dimethyl carbonate recovery methodInfo
- Publication number
- JPS593463B2 JPS593463B2 JP51017175A JP1717576A JPS593463B2 JP S593463 B2 JPS593463 B2 JP S593463B2 JP 51017175 A JP51017175 A JP 51017175A JP 1717576 A JP1717576 A JP 1717576A JP S593463 B2 JPS593463 B2 JP S593463B2
- Authority
- JP
- Japan
- Prior art keywords
- dimethyl carbonate
- recovery method
- azeotrope
- carbonate recovery
- methanol
- 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
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 5
- 238000011084 recovery Methods 0.000 title 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
- 239000000203 mixture Substances 0.000 description 5
- 238000004821 distillation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 150000005676 cyclic carbonates Chemical class 0.000 description 1
- GUNDKLAGHABJDI-UHFFFAOYSA-N dimethyl carbonate;methanol Chemical compound OC.COC(=O)OC GUNDKLAGHABJDI-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C68/00—Preparation of esters of carbonic or haloformic acids
- C07C68/08—Purification; Separation; Stabilisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C68/00—Preparation of esters of carbonic or haloformic acids
- C07C68/06—Preparation of esters of carbonic or haloformic acids from organic carbonates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
【発明の詳細な説明】
本発明はメタノールとの共沸混合物から純粋なジメチル
カーボネートを回収する方法に係わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for recovering pure dimethyl carbonate from an azeotrope with methanol.
ジメチルカーボネートは環状カーボネートおよびアルコ
ールを原料とするエステル交換反応により得られるが、
ジメチルカーボネートの場合には該化合物とメチルアル
コールとの共沸混合物として生成されることは公知であ
る。米国特許第３８０３２０１号明細書によれば、反応
生成物から蒸留により前記共沸混合物を取出５ したの
ち、低温における晶析工程および蒸留工程の２つの工程
でジメチルカーボネートが共沸混合物から分離されるっ
本発明者は、加圧下での蒸留工程のみを実施することに
より、上記の方法よりも経済的でかつ簡１０単に、製造
工程中に生成された共沸混合物からジメチルカーボネー
トを単離できることを見出し、本発明に到達した。Dimethyl carbonate is obtained by transesterification using cyclic carbonate and alcohol as raw materials.
In the case of dimethyl carbonate, it is known that it is produced as an azeotrope of this compound and methyl alcohol. According to US Pat. No. 3,803,201, after the azeotrope is extracted from the reaction product by distillation5, dimethyl carbonate is separated from the azeotrope in two steps: a crystallization step at low temperature and a distillation step. The present inventor has discovered that dimethyl carbonate can be isolated from the azeotrope produced during the production process more economically and more easily than the above method by performing only a distillation step under pressure. Heading, we arrived at the present invention.
実施例
Ｏ、３２ｃｍ（１／ ８インチ）のセラミク製ラシヒ１
５ リングを充填した、直径３．８ｃｍ（１．５インチ
）、高さ１０１．６ｃｍ（４０インチ）スチールカラム
を具備する容積１１■の容器に、メタノール−ジメチル
カーボネート混合物を導入した。Example O, 32 cm (1/8 inch) ceramic rashich 1
The methanol-dimethyl carbonate mixture was introduced into a 11 .mu. volume vessel equipped with a 1.5 inch diameter, 40 inch high steel column packed with 5 rings.
混合物の組成は７０：３０（重量）であり、これは１気
圧下で２０共沸する組成に相当する。窒素圧力下、混合
物を１０気圧で蒸留した。The composition of the mixture was 70:30 (by weight), which corresponds to a composition with a 20 azeotrope under 1 atmosphere. The mixture was distilled at 10 atmospheres under nitrogen pressure.
塔底温度は１５０℃であり、塔頂温度は１４２℃であつ
た。この蒸留により、メタノール９５％およびジメ２５
チルカーボネート５％を含有する塔頂留分が得られ、
一方塔底留分は純粋なジメチルカーボネートであつた。The tower bottom temperature was 150°C, and the tower top temperature was 142°C. This distillation produces 95% methanol and 25% dimethane.
An overhead fraction containing 5% chill carbonate is obtained,
On the other hand, the bottom fraction was pure dimethyl carbonate.
Claims (1)
トを回収する方法において、前記共沸混合物を１０気圧
、塔底温度１５０℃および塔頂温度１４２℃で蒸留する
ことを特徴とする、ジメチルカーボネートの回収法。1. A method for recovering dimethyl carbonate from an azeotrope with methanol, the method comprising distilling the azeotrope at 10 atm, a bottom temperature of 150°C, and a top temperature of 142°C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT20505/75A IT1031933B (en) | 1975-02-21 | 1975-02-21 | PROCESS FOR THE RECOVERY OF DIMETHYL CARBONATE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS51108019A JPS51108019A (en) | 1976-09-25 |
| JPS593463B2 true JPS593463B2 (en) | 1984-01-24 |
Family
ID=11167935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP51017175A Expired JPS593463B2 (en) | 1975-02-21 | 1976-02-20 | Dimethyl carbonate recovery method |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS593463B2 (en) |
| AU (1) | AU1108876A (en) |
| BE (1) | BE838502A (en) |
| CH (1) | CH620416A5 (en) |
| CS (1) | CS188130B2 (en) |
| DD (1) | DD123451A5 (en) |
| DE (1) | DE2607003C3 (en) |
| DK (1) | DK146413C (en) |
| FR (1) | FR2301509A1 (en) |
| GB (1) | GB1470160A (en) |
| IL (1) | IL49005A0 (en) |
| IT (1) | IT1031933B (en) |
| LU (1) | LU74382A1 (en) |
| NL (1) | NL7601777A (en) |
| NO (1) | NO146772C (en) |
| SE (1) | SE426060B (en) |
| YU (1) | YU39121B (en) |
| ZA (1) | ZA76678B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2740243A1 (en) | 1977-09-07 | 1979-03-15 | Bayer Ag | PROCESS FOR THE PRODUCTION OF DIALKYLCARBONATES |
| JP2557099B2 (en) * | 1989-02-13 | 1996-11-27 | ダイセル化学工業株式会社 | Method for separating dimethyl carbonate |
| DE4234525A1 (en) * | 1992-10-13 | 1994-04-14 | Bayer Ag | Process for the separation of alkanols from oxygen-containing organic compounds with a higher carbon number |
| DE4319570A1 (en) * | 1993-06-14 | 1994-12-15 | Bayer Ag | Process and separation of alkanols from other organic compounds with a higher carbon number |
| ES2103520T3 (en) * | 1993-07-15 | 1997-09-16 | Bayer Ag | PROCEDURE FOR OBTAINING DIMETHYL CARBONATE. |
| DE4339977A1 (en) * | 1993-11-24 | 1995-06-01 | Bayer Ag | Process for working up the liquid reaction products from the copper-catalyzed production of dimethyl carbonate |
| EP2121563B1 (en) | 2007-02-16 | 2016-05-04 | SABIC Global Technologies B.V. | Process for manufacturing dimethyl carbonate |
| PL2121562T3 (en) | 2007-02-16 | 2017-12-29 | Sabic Global Technologies B.V. | Process for manufacturing dimethyl carbonate |
-
1975
- 1975-02-21 IT IT20505/75A patent/IT1031933B/en active
-
1976
- 1976-02-05 ZA ZA760678A patent/ZA76678B/en unknown
- 1976-02-10 IL IL49005A patent/IL49005A0/en unknown
- 1976-02-12 BE BE164276A patent/BE838502A/en not_active IP Right Cessation
- 1976-02-12 YU YU00326/76A patent/YU39121B/en unknown
- 1976-02-13 AU AU11088/76A patent/AU1108876A/en not_active Expired
- 1976-02-16 GB GB604176A patent/GB1470160A/en not_active Expired
- 1976-02-17 SE SE7601800A patent/SE426060B/en not_active IP Right Cessation
- 1976-02-18 FR FR7604444A patent/FR2301509A1/en active Granted
- 1976-02-18 DK DK66876A patent/DK146413C/en not_active IP Right Cessation
- 1976-02-19 LU LU74382A patent/LU74382A1/xx unknown
- 1976-02-19 NO NO760557A patent/NO146772C/en unknown
- 1976-02-19 CH CH203476A patent/CH620416A5/en not_active IP Right Cessation
- 1976-02-19 DD DD191340A patent/DD123451A5/xx unknown
- 1976-02-20 NL NL7601777A patent/NL7601777A/en unknown
- 1976-02-20 DE DE2607003A patent/DE2607003C3/en not_active Expired
- 1976-02-20 JP JP51017175A patent/JPS593463B2/en not_active Expired
- 1976-02-23 CS CS761178A patent/CS188130B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH620416A5 (en) | 1980-11-28 |
| DD123451A5 (en) | 1976-12-20 |
| DK146413B (en) | 1983-10-03 |
| DK66876A (en) | 1976-08-22 |
| AU1108876A (en) | 1977-08-18 |
| NO146772C (en) | 1982-12-08 |
| FR2301509A1 (en) | 1976-09-17 |
| GB1470160A (en) | 1977-04-14 |
| DE2607003B2 (en) | 1979-08-16 |
| CS188130B2 (en) | 1979-02-28 |
| IT1031933B (en) | 1979-05-10 |
| YU39121B (en) | 1984-06-30 |
| SE7601800L (en) | 1976-08-23 |
| YU32676A (en) | 1982-05-31 |
| DE2607003A1 (en) | 1976-09-02 |
| JPS51108019A (en) | 1976-09-25 |
| DK146413C (en) | 1984-03-12 |
| IL49005A0 (en) | 1976-04-30 |
| FR2301509B1 (en) | 1979-02-02 |
| DE2607003C3 (en) | 1980-04-17 |
| NO146772B (en) | 1982-08-30 |
| ZA76678B (en) | 1977-04-27 |
| NO760557L (en) | 1976-08-24 |
| LU74382A1 (en) | 1976-08-13 |
| NL7601777A (en) | 1976-08-24 |
| BE838502A (en) | 1976-08-12 |
| SE426060B (en) | 1982-12-06 |
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