CN104086386B - Method and the device of 2-methyl-2-pentenal serving is extracted in a kind of propionic aldehyde waste liquid - Google Patents
Method and the device of 2-methyl-2-pentenal serving is extracted in a kind of propionic aldehyde waste liquid Download PDFInfo
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- CN104086386B CN104086386B CN201410326905.8A CN201410326905A CN104086386B CN 104086386 B CN104086386 B CN 104086386B CN 201410326905 A CN201410326905 A CN 201410326905A CN 104086386 B CN104086386 B CN 104086386B
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/78—Separation; Purification; Stabilisation; Use of additives
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
The present invention discloses a kind of method extracting 2-methyl-2-pentenal serving in propionic aldehyde waste liquid, comprises the following steps: (1) is filtered preparing the waste liquid produced in propionic aldehyde process by film unit, and the material its Middle molecule being greater than 2-methyl-2-pentenal serving molecule filters out; (2) mixture after filtration is transported in rectifying tower, heating tower bottom of rectifying tower, makes mixture form azeotropic, isolate gaseous substance by tower top, at the bottom of tower, discharge raffinate; (3) isolated for tower top gaseous substance being condensed into liquid phase is transported in hold-up vessel; (4) detect 2-methyl-2-pentenal serving content in storage pot liquid, underproof conveying is got back in rectifying tower, repeats (2) ~ (3) step; (5) transport of liquid that in step (4), content detection is qualified, in products pot, obtains described 2-methyl-2-pentenal serving.The present invention extracts 2-methyl-2-pentenal serving in the waste liquid preparing propionic aldehyde generation, greatly reduces production cost, can not cause the wasting of resources.
Description
Technical field
The present invention relates to a kind of method and the device that extract 2-methyl-2-pentenal serving, in especially a kind of propionic aldehyde waste liquid, extract method and the device of 2-methyl-2-pentenal serving.
Background technology
In the preparation method of propionic aldehyde, low pressure oxo synthesis is current main method and developing direction, and in the preparation system of low pressure oxo synthesis, propionic aldehyde is understood condensation thus produced 2-methyl-2-pentenal serving.
2-methyl-2-pentenal serving is the synthesis of important organic synthesis intermediate, such as strawberriff.Simultaneously 2-methyl-2-pentenal serving has stronger toxicity, easy firing and have pungency.
In existing propionic aldehyde preparation technology, the 2-methyl-2-pentenal serving be condensed into by propionic aldehyde is blended in waste liquid, processes discharge together with waste liquid, not only enterprise is caused to the waste of resource, and the waste liquid simultaneously discharged also can pollute bad border.
Summary of the invention
Goal of the invention: the object of the invention is for the deficiencies in the prior art, provides the method and the device that extract 2-methyl-2-pentenal serving in a kind of waste liquid preparing propionic aldehyde generation.
Technical scheme: the method extracting 2-methyl-2-pentenal serving in propionic aldehyde waste liquid of the present invention, comprises the following steps:
(1) filtered preparing the waste liquid produced in propionic aldehyde process by film unit, the material its Middle molecule being greater than 2-methyl-2-pentenal serving molecule filters out;
(2) mixture after filtration is transported in rectifying tower, heating tower bottom of rectifying tower, makes mixture form azeotropic, isolate gaseous substance by tower top, at the bottom of tower, discharge raffinate;
(3) isolated for tower top gaseous substance being condensed into liquid phase is transported in hold-up vessel;
(4) detect 2-methyl-2-pentenal serving content in storage pot liquid, underproof conveying is got back in rectifying tower, repeats (2) ~ (3) step;
(5) transport of liquid that in step (4), content detection is qualified, in products pot, obtains described 2-methyl-2-pentenal serving.
Preferably, raffinate described in step (2) is transmitted back to rectifying again in rectifying tower.Have the 2-methyl-2-pentenal serving failing to be formed in time gas phase in described raffinate, can again return rectifying in rectifying tower.
Preferably, in step (2), the temperature of tower bottom of rectifying tower is 110 ~ 130 DEG C, and the temperature of tower top is 90 ~ 100 DEG C.
Extract the device of 2-methyl-2-pentenal serving in propionic aldehyde waste liquid of the present invention, comprise filtration unit, rectifying tower and condenser, the entrance of described filtration unit is connected with waste liquid outlet, and the outlet of described filtration unit is connected with described rectifying tower import by delivery tube; Described rectifying tower tower top is provided with vapour outlet, and be provided with raffinate outlet at the bottom of tower, described vapour outlet is connected with described condenser inlet by delivery tube, and described condensator outlet is connected with products pot by delivery tube;
Described filtration unit is the strainer being provided with two-layer above film unit, and described film unit is provided with the hole consistent with 2-methyl-2-pentenal serving molecular size.
Further, be also provided with reflux between described rectifying tower and described products pot, described reflux import is connected by delivery tube with condensator outlet, and described reflux outlet is connected by delivery tube with products pot, rectifying tower respectively.
Further, the delivery tube between described reflux and described products pot, described rectifying tower is respectively arranged with valve.According to the detected result of 2-methyl-2-pentenal serving content, can select to open or close valve, Liquid transfer in hold-up vessel entered to products pot or be back in rectifying tower.
Preferably, described rectifying tower raffinate outlet is provided with valve.The valve of rectifier bottoms conveniently can control the reaction times of mixture in rectifying tower, can effluent discharge in time after fully reacting.
Preferably, described film unit is molecular sieve.
Preferably, described rectifying tower is atmospheric distillation tower.
Beneficial effect: (1) the present invention extracts 2-methyl-2-pentenal serving in the waste liquid preparing propionic aldehyde generation, greatly reduces production cost, can not cause the wasting of resources; (2) the present invention can effectively reduce discharging of waste liquid amount, reduces environmental pollution; (3) present invention process is simple, is conducive to industrialization scale operation.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention structural representation.
Embodiment
Below by accompanying drawing, technical solution of the present invention is described in detail, but protection scope of the present invention is not limited to described embodiment.
embodiment 1:extract a device for 2-methyl-2-pentenal serving in propionic aldehyde waste liquid, comprise filtration unit 1, atmospheric distillation tower 3 and condenser 5;
The entrance of described filtration unit 1 is connected with waste liquid outlet, and the outlet of described filtration unit 1 is connected with the import of described atmospheric distillation tower 3 by delivery tube; Described atmospheric distillation tower 3 tower top is provided with vapour outlet 4, and be provided with raffinate outlet at the bottom of tower, described vapour outlet 4 is connected with the import of described condenser 5 by delivery tube; Described condenser 5 is exported and is connected by the import of delivery tube with reflux 6; The outlet of described reflux 6 is connected by delivery tube with products pot 7, atmospheric distillation tower 3 respectively, described delivery tube is respectively arranged with valve 8;
Described filtration unit is the strainer being provided with two-layer above molecular sieve 2, and described molecular sieve 2 is provided with the hole consistent with 2-methyl-2-pentenal serving molecular size.
Step during specific works:
(1) filtered preparing the waste liquid produced in propionic aldehyde process by molecular sieve 2, the material its Middle molecule being greater than 2-methyl-2-pentenal serving molecule filters out;
(2) be transported in atmospheric distillation tower 3 by the mixture after filtration, heating rectifying tower 3, make the temperature of tower bottom of rectifying tower reach 110 ~ 130 DEG C, tower top reaches 90 ~ 100 DEG C, thus makes mixture form azeotropic, isolates gaseous substance, discharge raffinate at the bottom of tower by tower top 4;
(3) isolated for tower top 4 gaseous substance being condensed into liquid phase by condenser 5 is transported in hold-up vessel 6;
(4) to detect in hold-up vessel 6 2-methyl-2-pentenal serving content in liquid, underproof conveying is got back in rectifying tower 3, repeats (2) ~ (3) step;
(5) transport of liquid that in step (4), content detection is qualified, in products pot 7, obtains described 2-methyl-2-pentenal serving.
As mentioned above, although represented with reference to specific preferred embodiment and described the utility model, it shall not be construed as the restriction to the utility model self.Under the spirit and scope of the present invention prerequisite not departing from claims definition, various change can be made in the form and details to it.
Claims (7)
1. extract a method for 2-methyl-2-pentenal serving in propionic aldehyde waste liquid, it is characterized in that comprising the following steps:
(1) filtered preparing the waste liquid produced in propionic aldehyde process by film unit, the material its Middle molecule being greater than 2-methyl-2-pentenal serving molecule filters out;
(2) be transported in rectifying tower by the mixture after filtration, heating tower bottom of rectifying tower, the temperature of tower bottom of rectifying tower is 110 ~ 130 DEG C, and the temperature of tower top is 90 ~ 100 DEG C, makes mixture form azeotropic, isolates gaseous substance by tower top, discharge raffinate at the bottom of tower;
(3) raffinate is transmitted back to rectifying again in rectifying tower; Isolated for tower top gaseous substance is condensed into liquid phase to be transported in hold-up vessel;
(4) detect 2-methyl-2-pentenal serving content in storage pot liquid, underproof conveying is got back in rectifying tower, repeats (2) ~ (3) step;
(5) transport of liquid that in step (4), content detection is qualified, in products pot, obtains described 2-methyl-2-pentenal serving.
2. in a propionic aldehyde waste liquid, extract the device of 2-methyl-2-pentenal serving, it is characterized in that: comprise filtration unit, rectifying tower and condenser, the entrance of described filtration unit is connected with waste liquid outlet, and the outlet of described filtration unit is connected with described rectifying tower import by delivery tube; Described rectifying tower tower top is provided with vapour outlet, and be provided with raffinate outlet at the bottom of tower, described vapour outlet is connected with described condenser inlet by delivery tube, and described condensator outlet is connected with products pot by delivery tube;
Described filtration unit is the strainer being provided with two-layer above film unit, and described film unit is provided with the hole consistent with 2-methyl-2-pentenal serving molecular size.
3. the device of extraction 2-methyl-2-pentenal serving according to claim 2, it is characterized in that: between described rectifying tower and described products pot, be also provided with reflux, described reflux import is connected by delivery tube with condensator outlet, and described reflux outlet is connected by delivery tube with products pot, rectifying tower respectively.
4. the device of extraction 2-methyl-2-pentenal serving according to claim 3, is characterized in that: the delivery tube between described reflux and described products pot, described rectifying tower is respectively arranged with valve.
5. the device of extraction 2-methyl-2-pentenal serving according to claim 2, is characterized in that: described rectifying tower raffinate outlet is provided with valve.
6. the device of extraction 2-methyl-2-pentenal serving according to claim 2, is characterized in that: described film unit is molecular sieve.
7. the device of extraction 2-methyl-2-pentenal serving according to claim 2, is characterized in that: described rectifying tower is atmospheric distillation tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326905.8A CN104086386B (en) | 2014-07-09 | 2014-07-09 | Method and the device of 2-methyl-2-pentenal serving is extracted in a kind of propionic aldehyde waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410326905.8A CN104086386B (en) | 2014-07-09 | 2014-07-09 | Method and the device of 2-methyl-2-pentenal serving is extracted in a kind of propionic aldehyde waste liquid |
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| CN104086386A CN104086386A (en) | 2014-10-08 |
| CN104086386B true CN104086386B (en) | 2016-04-27 |
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| CN109970530B (en) * | 2019-05-07 | 2020-11-10 | 四川大学 | Method for preparing strawberry acid by utilizing propionaldehyde industrial waste liquid |
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| CN102336638A (en) * | 2011-07-20 | 2012-02-01 | 南京荣欣化工有限公司 | Technical method for producing propyl aldehyde through hydroformylation of ethylene |
| CN102344349B (en) * | 2011-08-22 | 2013-09-18 | 无锡百川化工股份有限公司 | Method for preparing 2-methyl-2-pentena |
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Effective date of registration: 20181211 Address after: Room 1129, 11th floor, Traffic Bureau Building, 95 Yingbin Avenue, Xinhua Street, Huadu District, Guangzhou City, Guangdong 510800 Patentee after: Guangzhou New Century New Energy Development Co., Ltd. Address before: 210047 No. 99 Munifeng Road, Nanjing Chemical Park, Nanjing, Jiangsu Province Patentee before: Nanjing Rongxin Chemical Co., Ltd. |
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Effective date of registration: 20181225 Address after: Room 1129, 11th floor, Traffic Bureau Building, 95 Yingbin Avenue, Xinhua Street, Huadu District, Guangzhou City, Guangdong 510800 Patentee after: Guangzhou New Century New Energy Development Co., Ltd. Address before: 210047 No. 99 Munifeng Road, Nanjing Chemical Park, Nanjing, Jiangsu Province Patentee before: Nanjing Rongxin Chemical Co., Ltd. |
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Effective date of registration: 20201216 Address after: 210047 -095, Fang Shui Road, Nanjing Chemical Industrial Park, Nanjing, Jiangsu, China, 168 Patentee after: NANJING RONGXIN CHEMICAL INDUSTRIAL Co.,Ltd. Address before: Room 1129, 11th floor, Traffic Bureau Building, 95 Yingbin Avenue, Xinhua Street, Huadu District, Guangzhou City, Guangdong 510800 Patentee before: GUANGZHOU XINSHIJI NEW ENERGY DEVELOPMENT Co.,Ltd. |