CN217663356U - Activation and washing device for raney nickel catalyst - Google Patents
Activation and washing device for raney nickel catalyst Download PDFInfo
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- CN217663356U CN217663356U CN202221989840.1U CN202221989840U CN217663356U CN 217663356 U CN217663356 U CN 217663356U CN 202221989840 U CN202221989840 U CN 202221989840U CN 217663356 U CN217663356 U CN 217663356U
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- washing
- kettle
- pipeline
- raney nickel
- nickel catalyst
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- 238000005406 washing Methods 0.000 title claims abstract description 148
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 229910000564 Raney nickel Inorganic materials 0.000 title claims abstract description 43
- 230000004913 activation Effects 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000006243 chemical reaction Methods 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 25
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 238000011001 backwashing Methods 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 8
- 239000008237 rinsing water Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000003213 activating effect Effects 0.000 abstract description 2
- 238000001994 activation Methods 0.000 description 25
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 17
- 229910001388 sodium aluminate Inorganic materials 0.000 description 17
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000007790 solid phase Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000004065 wastewater treatment Methods 0.000 description 4
- 239000007868 Raney catalyst Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 150000002739 metals Chemical class 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
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002638 heterogeneous catalyst Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Abstract
The utility model relates to a raney nickel catalyst production technical field, concretely relates to raney nickel catalyst activation washing device. The activation and washing device for the Raney nickel catalyst comprises an alkaline washing reaction kettle, a No. 1 washing settling kettle, a No. 2 washing settling kettle and a backwashing tower; the top of the alkaline washing reaction kettle is provided with a nickel-aluminum alloy powder feeding port and is connected with a water adding pipeline and an alkali liquor pipeline, and a discharge port at the bottom of the alkaline washing reaction kettle is respectively connected with feed ports of a No. 1 washing settling kettle and a No. 2 washing settling kettle; a discharge port at the bottom of the No. 1 washing settling kettle is connected with a No. 1 product storage tank; a discharge port at the bottom of the No. 2 washing settling kettle is connected with a feed port of the backwashing tower; the bottom discharge hole of the back washing tower is connected with a 2# product storage tank. The utility model discloses an activation washing device washes the raney nickel catalyst layering after will activating, has reduced the washing degree of difficulty, has reduced the washing water consumption, has improved raney nickel catalyst quality simultaneously.
Description
Technical Field
The utility model relates to a raney nickel catalyst production technical field, concretely relates to raney nickel catalyst activation washing device.
Background
The Raney nickel catalyst is silver gray amorphous powder (nickel-aluminum alloy powder) before activation, has moderate flammability, is partially activated in the presence of water, generates hydrogen gas, is easy to agglomerate, and is easy to weather after being exposed in the air for a long time. The nickel-aluminum alloy powder is activated into gray black particles, attached with active hydrogen, extremely unstable, oxidized and combusted in the air, and needs to be soaked in water or ethanol for storage. The preparation process is to treat the nickel-aluminum alloy with sodium hydroxide solution, and most aluminum reacts with alkali to dissolve, so that a plurality of micropores with different sizes are left. Thus, raney nickel is fine gray powder on the surface, but each tiny particle in the powder is a three-dimensional porous structure from the microscopic view, the porous structure greatly increases the surface area of the raney nickel, and the extremely large surface area brings high catalytic activity, so that raney nickel is widely used as a heterogeneous catalyst for hydrogenation reactions in organic synthesis and industrial production.
At present, the activation water washing of the raney nickel catalyst is generally realized by activating nickel-aluminum alloy powder at a high temperature by using a sodium hydroxide solution and then washing the powder with distilled water for a plurality of times. In actual production, after being activated in alkali liquor, the nickel-aluminum alloy powder can be separated into two solid phases, the lower layer is mainly a Raney nickel catalyst, the upper layer is a small amount of aluminum hydroxide generated in the activation process, the upper solid phase is directly contacted with the alkali liquor dissolved with sodium aluminate, the washing difficulty is higher than that of the lower layer, if the activated Raney nickel catalyst is discharged into a washing kettle for washing for multiple times, the washing difficulty can be increased, the distilled water consumption is increased, and a small amount of aluminum hydroxide generated in the activation process is mixed in the catalyst to influence the quality of the catalyst.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the activated raney nickel catalyst is washed in a layered mode, so that the washing difficulty is reduced, the water consumption for washing is reduced, and the quality of the raney nickel catalyst is improved.
The raney nickel catalyst activation water washing device comprises an alkaline washing reaction kettle, a No. 1 washing settling kettle, a No. 2 washing settling kettle and a back washing tower; the top of the alkaline washing reaction kettle is provided with a nickel-aluminum alloy powder feeding port and is connected with a water feeding pipeline and an alkali liquor pipeline, and a discharge port at the bottom of the alkaline washing reaction kettle is respectively connected with feeding ports of a No. 1 washing settling kettle and a No. 2 washing settling kettle; the top of the No. 1 washing settling kettle is connected with a No. 1 pure water pipeline, the side surface of the lower part of the No. 1 washing settling kettle is connected with a No. 1 washing liquid discharge pipeline, and a discharge port at the bottom of the No. 1 washing settling kettle is connected with a No. 1 product storage tank; the top of the No. 2 washing settling kettle is connected with a No. 2 pure water pipeline, the side surface of the lower part of the No. 2 washing settling kettle is connected with a No. 2 washing liquid discharge pipeline, and a discharge port at the bottom of the No. 2 washing settling kettle is connected with a feed port of a backwashing tower; the lower side of the back washing tower is connected with a 3# pure water pipeline, the upper side is connected with a 3# rinsing liquid discharge pipeline, and a bottom discharge port is connected with a 2# product storage tank.
As a preferable scheme, the alkali washing reaction kettle is a jacketed reaction kettle. A jacket of the alkaline washing reaction kettle is connected with a steam pipeline and a condensed water pipeline, and the temperature of the materials in the alkaline washing reaction kettle is raised during activation; meanwhile, a jacket of the alkaline washing reaction kettle is also connected with a cooling water circulation pipeline, and the materials in the alkaline washing reaction kettle are cooled after activation.
As a preferable scheme, the top of the alkaline washing reaction kettle is also connected with a nitrogen pipeline. In the activation process, nitrogen is introduced into the alkaline washing reaction kettle through a nitrogen pipeline, so that the activation reaction is carried out under the anaerobic condition, and the oxidation of the Raney nickel catalyst is avoided.
As a preferable scheme, the top of the alkaline washing reaction kettle is also connected with a tail gas pipeline. And (4) discharging the waste gas generated by activation in the alkaline washing reaction kettle through a tail gas pipeline, and conveying the waste gas to a tail gas treatment system for treatment.
As a preferred scheme, a discharge hole at the bottom of the No. 2 washing and settling kettle is connected with a feed inlet of a backwashing tower through a delivery pump. The material is conveyed by the conveying pump.
Preferably, a magnetic filter is arranged on the 3# water washing liquid discharge pipeline. Magnetic metals contained in the water washing liquid generated by the backwashing tower are removed through a magnetic filter, and then the water washing liquid is sent to a wastewater treatment system through a No. 3 water washing liquid discharge pipeline.
Raney nickel catalyst activation washing unit's working process as follows:
adding nickel-aluminum alloy powder into an alkaline washing reaction kettle through a nickel-aluminum alloy powder feeding port, then introducing nitrogen, adding alkali liquor and water through a water adding pipeline and an alkali liquor pipeline under the condition of continuous stirring, wherein most of aluminum reacts with the alkali or the water to be dissolved, sodium aluminate and a small amount of aluminum hydroxide are generated, a plurality of micropores with different sizes are left on the surface of the powder, each tiny particle in the powder is of a three-dimensional porous structure, and the surface area of the powder is greatly increased by virtue of the porous structure, so that the catalytic activity is improved. The nickel-aluminum alloy powder can be separated into two solid phases after being activated in alkali liquor, the lower layer is mainly a Raney nickel catalyst, the Raney nickel catalyst is discharged into a No. 1 washing settling kettle, pure water is added through a No. 1 pure water pipeline for washing, the washed washing liquid contains part of sodium aluminate, the sodium aluminate is discharged and collected through a No. 1 washing liquid discharge pipeline for recycling the sodium aluminate, and the cleaned Raney nickel catalyst is mixed with about 50% of water and is in a slurry state so as to protect the Raney nickel catalyst from being exposed in the air and is discharged to a No. 1 product storage tank. The upper layer is a small amount of aluminum hydroxide generated in the activation process, and is mixed with alkali liquor dissolved with sodium aluminate, the washing difficulty is higher than that of the lower layer, the lower layer is discharged to a 2# washing settling kettle, pure water is added through a 2# pure water pipeline for washing, the washed washing liquid contains part of sodium aluminate, the sodium aluminate is discharged and collected through a 2# washing liquid discharge pipeline for recycling the sodium aluminate, the washed Raney nickel catalyst is continuously discharged to a backwashing tower, pure water is added through a 3# pure water pipeline for further washing, magnetic metal contained in the washed washing liquid is removed, the magnetic metal is sent to a wastewater treatment system through a 3# washing liquid discharge pipeline, the washed Raney nickel catalyst contains converged aluminum hydroxide impurities, and the converged aluminum hydroxide impurities are discharged to a 2# product storage tank for storage.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a raney nickel catalyst activation washing device carries out the washing with the raney nickel catalyst layering after the activation, has reduced the washing degree of difficulty, has reduced the washing water consumption, has improved raney nickel catalyst quality simultaneously.
Drawings
FIG. 1 is a schematic structural diagram of a Raney nickel catalyst activation water washing device of the present invention;
in the figure: 1. a nitrogen line; 2. a water addition line; 3. an alkali liquor pipeline; 4. a nickel-aluminum alloy powder feeding port; 5. a tail gas line; 6. washing the reaction kettle with alkali; 7. 1# pure water line; 8. washing the settling kettle with No. 1 water; 9. a No. 1 water washing liquid discharge pipeline; 10. a 1# product storage tank; 11. 2# pure water line; 12. 2# washing the settling kettle; 13. a No. 2 water washing liquid discharge pipeline; 14. a delivery pump; 15. 3# water washing liquid discharge pipeline; 16. a magnetic filter; 17. backwashing the tower; 18. 3# pure water line; 19. 2# product storage tank.
Detailed Description
The following will describe in detail specific embodiments of the present invention. Well-known structures or functions may not be shown in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
As shown in fig. 1, the raney nickel catalyst activation water washing device of the present invention comprises an alkaline washing reaction kettle 6, a 1# water washing settling kettle 8, a 2# water washing settling kettle 12 and a back washing tower 17; the top of the alkaline washing reaction kettle 6 is provided with a nickel-aluminum alloy powder feeding port 4 and is connected with a water adding pipeline 2 and an alkali liquor pipeline 3, and a discharge port at the bottom of the alkaline washing reaction kettle 6 is respectively connected with feed inlets of a No. 1 washing settling kettle 8 and a No. 2 washing settling kettle 12; the top of the No. 1 washing settling kettle 8 is connected with a No. 1 pure water pipeline 7, the side surface of the lower part of the No. 1 washing settling kettle is connected with a No. 1 washing liquid discharge pipeline 9, and a discharge hole at the bottom of the No. 1 washing settling kettle is connected with a No. 1 product storage tank 10; the top of the No. 2 washing settling kettle 12 is connected with a No. 2 pure water pipeline 11, the side surface of the lower part of the No. 2 washing settling kettle is connected with a No. 2 washing liquid discharge pipeline 13, and a discharge hole at the bottom of the No. 2 washing settling kettle is connected with a feed inlet of a backwashing tower 17; the lower side of the back washing tower 17 is connected with a 3# pure water pipeline 18, the upper side is connected with a 3# rinsing liquid discharge pipeline 15, and a bottom discharge port is connected with a 2# product storage tank 19.
The alkali washing reaction kettle 6 is a jacket reaction kettle. A jacket of the alkaline washing reaction kettle 6 is connected with a steam pipeline and a condensed water pipeline, and the temperature of the materials in the alkaline washing reaction kettle 6 is raised during activation; meanwhile, a jacket of the alkaline washing reaction kettle 6 is also connected with a cooling water circulation pipeline, and the materials in the alkaline washing reaction kettle 6 are cooled after activation.
The top of the alkaline washing reaction kettle 6 is also connected with a nitrogen pipeline 1. In the activation process, nitrogen is introduced into the alkaline washing reaction kettle 6 through a nitrogen pipeline 1, so that the activation reaction is carried out under the oxygen-free condition, and the oxidation of the Raney nickel catalyst is avoided.
The top of the alkaline washing reaction kettle 6 is also connected with a tail gas pipeline 5. And (3) discharging the waste gas generated by activation in the alkaline washing reaction kettle 6 through a tail gas pipeline 5, and sending the waste gas to a tail gas treatment system for treatment.
And a discharge hole at the bottom of the No. 2 washing settling kettle 12 is connected with a feed inlet of a backwashing tower 17 through a conveying pump 14. The material is conveyed by the conveying pump 14.
And a magnetic filter 16 is arranged on the 3# rinsing liquid discharge pipeline 15. Magnetic metals contained in the water washing liquid generated by the backwashing tower 17 are removed through the magnetic filter 16, and then the water washing liquid is sent to a wastewater treatment system through a No. 3 water washing liquid discharge pipeline 15.
Raney nickel catalyst activation water washing device's working process as follows:
adding nickel-aluminum alloy powder into an alkaline washing reaction kettle 6 through a nickel-aluminum alloy powder feeding port 4, then introducing nitrogen, adding alkali liquor and water through a water adding pipeline 2 and an alkali liquor pipeline 3 under the condition of continuous stirring, wherein most of aluminum reacts with the alkali or the water to be dissolved, sodium aluminate and a small amount of aluminum hydroxide are generated, micropores with different sizes are left on the surface of the powder, each tiny particle in the powder is of a three-dimensional porous structure, and the surface area of the powder is greatly increased due to the porous structure, so that the catalytic activity is improved. The nickel-aluminum alloy powder is activated in alkali liquor and then separated into two solid phases, the lower layer is mainly a Raney nickel catalyst, the solid phases are discharged into a No. 1 washing settling kettle 8, pure water is added through a No. 1 pure water pipeline 7 for washing, the washed washing liquid contains part of sodium aluminate, the sodium aluminate is discharged and collected through a No. 1 washing liquid discharge pipeline 9 for recycling the sodium aluminate, and the cleaned Raney nickel catalyst is mixed with about 50% of water and is in a slurry state so as to protect the Raney nickel catalyst from being exposed in the air and is discharged to a No. 1 product storage tank 10. The upper layer is a small amount of aluminum hydroxide generated in the activation process, and is mixed with alkali liquor dissolved with sodium aluminate, the washing difficulty is higher than that of the lower layer, the aluminum hydroxide is discharged to a 2# washing settling kettle 12, pure water is added through a 2# pure water pipeline 11 for washing, the washed washing liquid contains part of the sodium aluminate, the sodium aluminate is discharged and collected through a 2# washing liquid discharge pipeline 13 for recycling the sodium aluminate, the washed Raney nickel catalyst is continuously discharged to a backwashing tower 17, pure water is added through a 3# pure water pipeline 18 for further washing, magnetic metal contained in the washed washing liquid is removed, the magnetic metal is sent to a wastewater treatment system through a 3# washing liquid discharge pipeline 15, the washed Raney nickel catalyst contains converged aluminum hydroxide impurities, and the converged aluminum hydroxide impurities are discharged to a 2# product storage tank 19 for storage.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A raney nickel catalyst activation water washing device which characterized in that: comprises an alkaline washing reaction kettle (6), a No. 1 washing settling kettle (8), a No. 2 washing settling kettle (12) and a back washing tower (17); the top of the alkaline washing reaction kettle (6) is provided with a nickel-aluminum alloy powder feeding port (4) and is connected with a water adding pipeline (2) and an alkaline liquor pipeline (3), and a discharge port at the bottom of the alkaline washing reaction kettle (6) is respectively connected with feed inlets of a No. 1 washing settling kettle (8) and a No. 2 washing settling kettle (12); the top of the No. 1 washing settling kettle (8) is connected with a No. 1 pure water pipeline (7), the side surface of the lower part of the No. 1 washing settling kettle is connected with a No. 1 washing liquid discharge pipeline (9), and a discharge hole at the bottom of the No. 1 washing settling kettle is connected with a No. 1 product storage tank (10); the top of the 2# washing settling kettle (12) is connected with a 2# pure water pipeline (11), the side surface of the lower part of the 2# washing settling kettle is connected with a 2# washing liquid discharge pipeline (13), and a discharge hole at the bottom of the 2# washing settling kettle is connected with a feed inlet of a backwashing tower (17); the lower side surface of the back washing tower (17) is connected with a 3# pure water pipeline (18), the upper side surface of the back washing tower is connected with a 3# rinsing liquid discharge pipeline (15), and a bottom discharge hole is connected with a 2# product storage tank (19).
2. The raney nickel catalyst activation water washing apparatus according to claim 1, characterized in that: the alkali washing reaction kettle (6) is a jacket reaction kettle.
3. The raney nickel catalyst activation water washing apparatus according to claim 1, characterized in that: the top of the alkaline washing reaction kettle (6) is also connected with a nitrogen pipeline (1).
4. The raney nickel catalyst activation water washing apparatus according to claim 1, characterized in that: the top of the alkaline washing reaction kettle (6) is also connected with a tail gas pipeline (5).
5. The raney nickel catalyst activation water washing apparatus according to claim 1, characterized in that: and a discharge hole at the bottom of the No. 2 washing settling kettle (12) is connected with a feed inlet of a backwashing tower (17) through a conveying pump (14).
6. The raney nickel catalyst activation water washing apparatus according to claim 1, characterized in that: and a magnetic filter (16) is arranged on the 3# rinsing water discharge pipeline (15).
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| CN202221989840.1U CN217663356U (en) | 2022-07-29 | 2022-07-29 | Activation and washing device for raney nickel catalyst |
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| CN202221989840.1U CN217663356U (en) | 2022-07-29 | 2022-07-29 | Activation and washing device for raney nickel catalyst |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117225356A (en) * | 2023-11-14 | 2023-12-15 | 淄博亚华信橡塑有限责任公司 | Processing equipment for polyurethane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117225356A (en) * | 2023-11-14 | 2023-12-15 | 淄博亚华信橡塑有限责任公司 | Processing equipment for polyurethane |
| CN117225356B (en) * | 2023-11-14 | 2024-01-09 | 淄博亚华信橡塑有限责任公司 | A processing equipment for polyurethane |
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