CN220559193U - MTBE system for reducing water content in carbon four after ether - Google Patents
MTBE system for reducing water content in carbon four after ether Download PDFInfo
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- CN220559193U CN220559193U CN202322023575.2U CN202322023575U CN220559193U CN 220559193 U CN220559193 U CN 220559193U CN 202322023575 U CN202322023575 U CN 202322023575U CN 220559193 U CN220559193 U CN 220559193U
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- carbon
- distillation tower
- mtbe
- ether
- pipeline
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- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 65
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 title claims abstract description 64
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 63
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 105
- 230000003197 catalytic effect Effects 0.000 claims abstract description 28
- 238000010992 reflux Methods 0.000 claims abstract description 27
- 238000004821 distillation Methods 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 238000010533 azeotropic distillation Methods 0.000 claims abstract description 19
- 238000003808 methanol extraction Methods 0.000 claims abstract description 18
- 230000029936 alkylation Effects 0.000 claims abstract description 17
- 238000005804 alkylation reaction Methods 0.000 claims abstract description 17
- 238000006266 etherification reaction Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 3
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- FVNIMHIOIXPIQT-UHFFFAOYSA-N 2-methoxybutane Chemical compound CCC(C)OC FVNIMHIOIXPIQT-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000006079 antiknock agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- IAQRGUVFOMOMEM-ARJAWSKDSA-N cis-but-2-ene Chemical compound C\C=C/C IAQRGUVFOMOMEM-ARJAWSKDSA-N 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000003254 gasoline additive Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000001282 iso-butane Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- IAQRGUVFOMOMEM-ONEGZZNKSA-N trans-but-2-ene Chemical compound C\C=C\C IAQRGUVFOMOMEM-ONEGZZNKSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model discloses an MTBE system for reducing water content in carbon four after ether, and belongs to the technical field of MTBE production. The technical proposal is as follows: comprises an etherification reactor, an azeotropic distillation tower, a catalytic distillation tower top cooler, an azeotropic distillation tower reflux tank, a methanol extraction tower, a residual carbon four buffer tank, a filter and a coalescer which are connected in sequence through pipelines; the etherification reactor 1 is provided with a raw material carbon four inlet pipeline and a methanol inlet pipeline I; the bottom of the catalytic distillation tower is provided with an MTBE return pipeline, the catalytic distillation tower is also provided with a methanol inlet pipeline II, the reflux tank of the azeotropic distillation tower is communicated with the reflux port of the azeotropic distillation tower through the reflux pipeline of the azeotropic material, and the methanol extraction tower is also provided with an extractant inlet pipeline. The utility model adds the filter and the connector of the carbon four after the ether to the MTBE device to remove redundant water in the carbon four after the ether, thereby ensuring the normal operation of the alkylation device and having very important significance.
Description
Technical Field
The utility model belongs to the technical field of MTBE production, and particularly relates to an MTBE device for reducing water content in carbon four after ether.
Background
Methyl tert-butyl ether (MTBE) is an organic compound, is colorless transparent liquid, is insoluble in water and easy to dissolve in ethanol and diethyl ether, and is an excellent high-octane gasoline additive and antiknock agent. In actual production, isobutene in carbon four is commonly subjected to etherification reaction with methanol to generate MTBE. The product MTBE is used for producing high-purity isobutene or used as an additive for increasing the octane number in the production of high-grade gasoline, and excessive methanol in the etherification reaction is recycled. The mixed C4 after etherification is called as C4 after ether, and the main components of the mixed C4 after etherification are isobutane, n-butane, n-butene, cis-2-butene, trans-2-butene and a small amount of butadiene. The carbon four after the ether is used as a production raw material of an alkylation device of a refinery to produce high-octane gasoline component-alkylate. The utility model of China patent CN203269820U discloses an MTBE production device capable of efficiently recycling methanol, which comprises a carbon four raw material tank and a methanol raw material tank, wherein the carbon four raw material tank and the methanol raw material tank are both connected with a feed inlet of an etherification reactor, a discharge outlet of the etherification reactor is connected with a feed inlet of a catalytic rectifying tower, one discharge outlet of the catalytic rectifying tower is connected with an MTBE collecting device, the other discharge outlet of the catalytic rectifying tower is connected with a feed inlet of a water washing tower, a top outlet of the water washing tower is connected with an ether back carbon four collecting tank, a bottom outlet of the water washing tower is connected with a feed inlet of the methanol recovery tower, a discharge outlet of the methanol recovery tower is connected with the carbon four raw material tank, and a water outlet of the methanol recovery tower is connected with a water inlet of the water washing tower. When producing and obtaining high-quality MTBE, effectively retrieve behind methyl alcohol and the ether carbon four, reduce the waste of raw materials of production, this apparatus for producing still can realize effectively utilizing the waste water in the methyl alcohol recovery tower, carries out cyclic utilization to the heat of waste water resource simultaneously, resources are saved. However, when the carbon four after ether produced by the device is used as a production raw material of an alkylation device, the water content is over 400mg/kg, and the actual application requirement cannot be met.
Disclosure of Invention
The utility model aims to solve the technical problems that: the MTBE system for reducing the water content in the etherified carbon four is provided, and an etherified carbon four filter and a collector are added to an MTBE device to remove redundant water in the etherified carbon four, so that the normal operation of an alkylation device is ensured, and the MTBE system has very important significance.
The technical scheme of the utility model is as follows:
the MTBE system for reducing the water content in the etherified carbon four comprises an etherification reactor, an azeotropic distillation tower, a catalytic distillation tower top cooler, an azeotropic distillation tower reflux tank, a methanol extraction tower, a residual carbon four buffer tank, a filter and a coalescer which are sequentially connected through pipelines; the etherification reactor is provided with a raw material carbon four inlet pipeline and a methanol inlet pipeline I, and the methanol extraction tower is connected with a methanol outlet pipeline; the bottom of the catalytic distillation tower is provided with an MTBE return pipeline, the catalytic distillation tower is also provided with a methanol inlet pipeline II, the reflux tank of the azeotropic distillation tower is communicated with the reflux port of the azeotropic distillation tower through the reflux pipeline of the azeotropic material, and the methanol extraction tower is also provided with an extractant inlet pipeline; the residual carbon four buffer tank and the coalescer are communicated with an ether carbon four-out pipeline which is communicated with an external alkylation device.
Preferably, the MTBE return line is provided with a catalytic distillation column relay pump.
Preferably, the azeotrope reflux line is provided with an azeotropic distillation column reflux pump.
Preferably, a residual carbon four-out pump is arranged between the residual carbon four-buffer tank and the filter.
Preferably, the filter is provided with at least two filters.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model effectively solves the problem that the water content in the raw materials exceeds the requirement of 400mg/kg of process bags in the raw materials of the alkylation device after the ether carbon four of the MTBE device is sent to the raw material pretreatment unit of the alkylation device, and the water content of the raw materials of the alkylation device after the ether carbon four passes through a filter and a coalescer is less than 300mg/kg, thereby meeting the raw material requirement of the alkylation device and ensuring the stable operation of the alkylation device.
2. The utility model satisfies the control index of the methanol content less than or equal to 140mg/m in the raw material of the alkylation device by improving the flow rate of the methanol extraction water, thereby improving the purity of the alkylation raw material.
3. The MTBE device is added with the carbon four filter and the coalescer after the ether to remove redundant water in the carbon four after the ether, thereby ensuring the normal operation of the alkylation device and having very important significance.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
In the figure, 1, an etherification reactor; 2. an azeotropic rectifying tower; 3. a catalytic distillation column; 4. a catalytic distillation tower relay pump; 5. a catalytic distillation overhead cooler; 6. reflux tank of azeotropic rectifying tower; 7. reflux pump of azeotropic rectifying tower; 8. a methanol extraction column; 9. a remaining four-carbon buffer tank; 10. a residual carbon four-out pump; 11. a filter; 12. a coalescer; 13. a raw material carbon four inlet pipeline; 14. a first methanol inlet pipeline; 15. an MTBE return line; 16. a methanol inlet pipeline II; 17. an azeotrope return line; 18. an azeotrope reflux port; 19. an extractant inlet line; 20. a carbon four-out pipeline after ether; 21. a pipeline of the four-carbon methanol extraction tower; 22. a methanol outlet line.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1, this embodiment provides an MTBE system for reducing water content in post-ether carbon four, which includes an etherification reactor 1, an azeotropic distillation column 2, a catalytic distillation column 3, a catalytic distillation column top cooler 5, an azeotropic distillation column reflux drum 6, a methanol extraction column 8, a residual carbon four buffer drum 9, a filter 11 and a coalescer 12, which are sequentially connected through pipelines; the etherification reactor 1 is provided with a raw material carbon four inlet pipeline 13 and a methanol inlet pipeline 14, and the methanol extraction tower 8 is connected with a methanol outlet pipeline 22.
The bottom of the catalytic distillation tower 3 is provided with an MTBE return pipeline 15, the catalytic distillation tower 3 is also provided with a methanol inlet pipeline II 16, the azeotropic distillation tower reflux tank 6 is communicated with an azeotrope reflux port 18 of the catalytic distillation tower 3 through an azeotrope reflux pipeline 17, and the methanol extraction tower 8 is also provided with an extractant inlet pipeline 19; the residual carbon four buffer tank 9 and the coalescer 12 are communicated with an after-ether carbon four delivery pipeline 20, and the after-ether carbon four delivery pipeline 20 is communicated with an external alkylation device; the MTBE return line 15 is provided with a catalytic distillation tower relay pump; the azeotrope reflux pipeline 17 is provided with an azeotropic rectifying tower reflux pump 7; a residual carbon four-out pump 10 is arranged between the residual carbon four-buffer tank 9 and the filter 11; the filter 11 is provided with two filters, one for use, the filter 11 adopts LGJFM-100/2.5 manufactured by Nantong Gao Danhua equipment Co., ltd, and the coalescer 12 adopts LGJFJ-100/2.5 manufactured by Nantong Gao Danhua equipment Co., ltd.
The working process comprises the following steps:
the raw materials of C four and methanol enter an etherification reactor 1, and isobutene in the C four and the methanol are subjected to etherification reaction under the action of a macroporous strong acid cationic resin catalyst to generate MTBE. The reacted materials including excessive methanol, carbon four after ether, MTBE, by-product dimethyl ether, carbon four, MSBE (methyl sec-butyl ether), tertiary butanol and the like are sent to an azeotropic distillation tower 2 for separation. And distilling MTBE product with purity over 98% from the bottom of azeotropic rectifying tower 2. The azeotrope formed by the methanol and the carbon four in the azeotropic distillation tower 2 is discharged from the tower top and is sent to the catalytic distillation tower 3 to further react with the methanol, the generated MTBE returns to the azeotropic distillation tower 2 through the catalytic distillation tower relay pump 4, the unreacted methanol and the carbon four azeotrope enter the azeotropic distillation tower reflux tank 6 through the catalytic distillation tower top cooler 5, a part of the azeotrope is used as top reflux, and the other part of the azeotrope enters the methanol extraction tower 8 through the pipeline 21 of the carbon four-inlet methanol extraction tower. In the methanol extraction tower 8, water is used as an extractant, the dosage of extraction water is increased to extract methanol in the etherified carbon four, methanol after extraction is extracted from a methanol outlet pipeline 22, the etherified carbon four is extracted from the top of the methanol extraction tower 8, the methanol enters a residual carbon four buffer tank 9 and then enters a filter 11, the medium passes through the filter 11, impurity particles are intercepted, a coalescing filter element and a separation filter element are arranged in a coalescer 12, the medium flows from the inside of the coalescing filter element to the outside, the coalescing filter element coalesces tiny water drops dispersed in the medium into larger water drops, the coalesced water drops are settled to a water accumulation tank at the bottom of a shell under the action of gravity and the flow direction impact force of the medium, part of the unsettled water drops pass through the separation filter element along with the flow direction of the medium, the water drops pass through smoothly under the action of different tension of water and liquefied gas, the water drops are settled to the bottom of the shell under the action of a medium force, finally the water drops are discharged from a bottom drain outlet, the purpose of removing water in the etherified carbon four is achieved, the content of the etherified carbon four is less than 300mg/kg, the raw material of an alkylation device is met, and the stable operation of the alkylation device is ensured.
Although the present utility model has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present utility model is not limited thereto. Various equivalent modifications and substitutions for embodiments of the utility model may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these modifications and substitutions are intended to be within the scope of the utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (5)
1. MTBE system for reducing water content in carbon four after ether, which is characterized in that: comprises an etherification reactor (1), an azeotropic distillation tower (2), a catalytic distillation tower (3), a catalytic distillation tower top cooler (5), an azeotropic distillation tower reflux tank (6), a methanol extraction tower (8), a residual carbon four buffer tank (9), a filter (11) and a coalescer (12) which are connected in sequence through pipelines;
the etherification reactor (1) is provided with a raw material carbon four inlet pipeline (13) and a methanol inlet pipeline I (14), and the methanol extraction tower (8) is connected with a methanol outlet pipeline (22);
the bottom of the catalytic distillation tower (3) is provided with an MTBE return pipeline (15), the catalytic distillation tower (3) is also provided with a methanol inlet pipeline II (16), the azeotropic distillation tower reflux tank (6) is communicated with an azeotrope reflux port (18) of the catalytic distillation tower (3) through an azeotrope reflux pipeline (17), and the methanol extraction tower (8) is also provided with an extractant inlet pipeline (19); the residual carbon four buffer tank (9) and the coalescer (12) are both communicated with an ether carbon four delivery pipeline (20), and the ether carbon four delivery pipeline (20) is communicated with an external alkylation device.
2. The MTBE system for reducing the water content of post-ether carbon four of claim 1, wherein: the MTBE return pipeline (15) is provided with a catalytic distillation tower relay pump (4).
3. The MTBE system for reducing the water content of post-ether carbon four of claim 1, wherein: the azeotrope reflux pipeline (17) is provided with an azeotropic rectifying tower reflux pump (7).
4. The MTBE system for reducing the water content of post-ether carbon four of claim 1, wherein: a residual carbon four-out pump (10) is arranged between the residual carbon four-buffer tank (9) and the filter (11).
5. The MTBE system for reducing the water content of post-ether carbon four of claim 1, wherein: the filter (11) is provided with at least two filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322023575.2U CN220559193U (en) | 2023-07-31 | 2023-07-31 | MTBE system for reducing water content in carbon four after ether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322023575.2U CN220559193U (en) | 2023-07-31 | 2023-07-31 | MTBE system for reducing water content in carbon four after ether |
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| Publication Number | Publication Date |
|---|---|
| CN220559193U true CN220559193U (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322023575.2U Active CN220559193U (en) | 2023-07-31 | 2023-07-31 | MTBE system for reducing water content in carbon four after ether |
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| Country | Link |
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| CN (1) | CN220559193U (en) |
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2023
- 2023-07-31 CN CN202322023575.2U patent/CN220559193U/en active Active
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