CN105669451A - Dividing wall thermally coupled distillation method used for battery grade dimethyl carbonate, and apparatus thereof - Google Patents
Dividing wall thermally coupled distillation method used for battery grade dimethyl carbonate, and apparatus thereof Download PDFInfo
- Publication number
- CN105669451A CN105669451A CN201511035076.9A CN201511035076A CN105669451A CN 105669451 A CN105669451 A CN 105669451A CN 201511035076 A CN201511035076 A CN 201511035076A CN 105669451 A CN105669451 A CN 105669451A
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- China
- Prior art keywords
- thermal coupling
- grade
- cell
- next door
- methylcarbonate
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Classifications
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- 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
-
- 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
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/141—Fractional distillation or use of a fractionation or rectification column where at least one distillation column contains at least one dividing wall
Abstract
The invention relates to the field of rectification and especially relates to a dividing wall thermally coupled distillation method used for battery grade dimethyl carbonate, and an apparatus thereof. The method comprises the following steps: adding DMC and a certain proportion of an additive to a rectifying bottle, controlling the fractionation temperature and the discharging speed, operating at a certain reflux ratio, collecting light fraction, and collecting a finished product when the fractionation temperature keeps at 89DEG C unchanged. The method has the advantages of simple process, easy operation, stable quality of the product, and no discharge of three wastes, is a typical clean technology, and is suitable for scale production.
Description
Technical field
The present invention relates to rectifying field, especially relate to a kind of next door thermal coupling rectificating method for cell-grade methylcarbonate and equipment.
Background technology
Lithium ion battery is widely used in mobile communication and digital product field with its high-energy-density, high-voltage, is subject to market favor, and the production development as the battery material on lithium cell basis is paid attention to by enterprise deeply. Methylcarbonate is a kind of colourless transparent liquid, and because its viscosity is low, flash-point height is relatively commonly used in function type eletrolysis solution double solvents, cell-grade DMC requires that massfraction is greater than 99.9%, and moisture content is less than 10rag/ks, and Indexes Comparison is harsh.
Summary of the invention
The present invention provides a kind of next door thermal coupling rectificating method for cell-grade methylcarbonate and equipment.
For realizing above-mentioned goal of the invention, the enforcement mode that the present invention takes is as follows:
A kind of next door thermal coupling rectificating method for cell-grade methylcarbonate, its step is as follows:: in rectifying bottle, add DMC and a certain proportion of interpolation is stopped, control fractionation temperature and discharging speed, operate under flowing ratio certain, first collect lighting end, start to collect finished product when fractionation temperature-stable is at 89 DEG C.
Preferably, additive is the 2%～5% of raw material weight.
Preferably, to be adopted total reflux in the early stage of distillation operation, with moisture low solvent, the residual water-content " displacement " in rectifying column and filler be fallen, in rectifying bottle, be added agent catch, and then with certain reflux ratio discharging.
Preferably, reflux ratio R=1.5.
The present invention's rectifying tower used is complete thermal coupling tower.
The invention has the beneficial effects as follows: technique is simple, it is easy to operation, constant product quality, and unit's " three wastes " discharge, it is typical cleaning procedure, it is applicable to scale production.
Embodiment
Below in conjunction with embodiment, to describing in detail as follows according to embodiment provided by the invention:
Embodiment 1
A kind of next door thermal coupling rectificating method for cell-grade methylcarbonate, its step is as follows:: in rectifying bottle, add DMC and a certain proportion of interpolation is stopped, control fractionation temperature and discharging speed, operate under flowing ratio certain, first collect lighting end, start to collect finished product when fractionation temperature-stable is at 89 DEG C.
Preferably, additive is the 2%～5% of raw material weight.
Preferably, to be adopted total reflux in the early stage of distillation operation, with moisture low solvent, the residual water-content " displacement " in rectifying column and filler be fallen, in rectifying bottle, be added agent catch, and then with certain reflux ratio discharging.
Preferably, reflux ratio R=1.5.
The present invention's rectifying tower used is complete thermal coupling tower.
The invention has the beneficial effects as follows: technique is simple, it is easy to operation, constant product quality, and unit's " three wastes " discharge, it is typical cleaning procedure, it is applicable to scale production.
Above one embodiment of the present of invention is described in detail, but described content is only the better embodiment of the present invention, the practical range for limiting the present invention can not be considered to. All equalizations done according to the present patent application scope change and improvement etc., all should still belong within the patent covering scope of the present invention.
Claims (5)
1. the next door thermal coupling rectificating method for cell-grade methylcarbonate, it is characterized in that: its step is as follows: in rectifying bottle, add DMC and a certain proportion of interpolation is stopped, control fractionation temperature and discharging speed, operate under flowing ratio certain, first collect lighting end, start to collect finished product when fractionation temperature-stable is at 89 DEG C.
2. a kind of next door thermal coupling rectificating method for cell-grade methylcarbonate according to claim 1, it is characterised in that: described additive is the 2%～5% of raw material weight.
3. a kind of next door thermal coupling rectificating method for cell-grade methylcarbonate according to claim 1, it is characterized in that: to be adopted total reflux in the early stage of distillation operation, with moisture low solvent, the residual water-content " displacement " in rectifying column and filler is fallen, in rectifying bottle, it is added agent catch, and then with certain reflux ratio discharging.
4. a kind of next door thermal coupling rectificating method for cell-grade methylcarbonate according to claim 1, it is characterised in that: reflux ratio R=1.5.
5. the described a kind of equipment used for the next door thermal coupling rectificating method of cell-grade methylcarbonate of the arbitrary item of claim 1-4, it is characterised in that: rectifying tower used is complete thermal coupling tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035076.9A CN105669451A (en) | 2015-12-31 | 2015-12-31 | Dividing wall thermally coupled distillation method used for battery grade dimethyl carbonate, and apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511035076.9A CN105669451A (en) | 2015-12-31 | 2015-12-31 | Dividing wall thermally coupled distillation method used for battery grade dimethyl carbonate, and apparatus thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105669451A true CN105669451A (en) | 2016-06-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511035076.9A Pending CN105669451A (en) | 2015-12-31 | 2015-12-31 | Dividing wall thermally coupled distillation method used for battery grade dimethyl carbonate, and apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105669451A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400055A (en) * | 2017-09-05 | 2017-11-28 | 天津科技大学 | A kind of LITHIUM BATTERY dimethyl carbonate rectification and purification method and equipment |
| CN111848401A (en) * | 2020-08-17 | 2020-10-30 | 东华工程科技股份有限公司 | Device and process for refining dimethyl carbonate by energy coupling with partition wall tower |
| CN115417768A (en) * | 2022-09-23 | 2022-12-02 | 中国五环工程有限公司 | Energy coupling process for preparing dimethyl carbonate by liquid-phase oxidative carbonylation of methanol |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1349973A (en) * | 2001-09-03 | 2002-05-22 | 广西大学 | Method and apparatus for synthesizing dimethyl carbonate |
| CN101367732A (en) * | 2008-10-06 | 2009-02-18 | 中国石油大学(华东) | Process and apparatus for preparing diethyl carbonate |
| CN104395278A (en) * | 2012-06-29 | 2015-03-04 | 沙特基础创新塑料Ip私人有限责任公司 | Method and apparatus for the production of diaryl carbonate |
-
2015
- 2015-12-31 CN CN201511035076.9A patent/CN105669451A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1349973A (en) * | 2001-09-03 | 2002-05-22 | 广西大学 | Method and apparatus for synthesizing dimethyl carbonate |
| CN101367732A (en) * | 2008-10-06 | 2009-02-18 | 中国石油大学(华东) | Process and apparatus for preparing diethyl carbonate |
| CN104395278A (en) * | 2012-06-29 | 2015-03-04 | 沙特基础创新塑料Ip私人有限责任公司 | Method and apparatus for the production of diaryl carbonate |
Non-Patent Citations (2)
| Title |
|---|
| 张宗涛: "电池级碳酸二甲酯提纯工艺研究", 《云南化工》 * |
| 朱登磊等: "基于分壁式精馏塔的甲醇－碳酸二甲酯分离新工艺研究", 《现代化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107400055A (en) * | 2017-09-05 | 2017-11-28 | 天津科技大学 | A kind of LITHIUM BATTERY dimethyl carbonate rectification and purification method and equipment |
| CN111848401A (en) * | 2020-08-17 | 2020-10-30 | 东华工程科技股份有限公司 | Device and process for refining dimethyl carbonate by energy coupling with partition wall tower |
| CN115417768A (en) * | 2022-09-23 | 2022-12-02 | 中国五环工程有限公司 | Energy coupling process for preparing dimethyl carbonate by liquid-phase oxidative carbonylation of methanol |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160615 |