CN111514613A - Alkali liquor separation system and cyclohexanone preparation system - Google Patents
Alkali liquor separation system and cyclohexanone preparation system Download PDFInfo
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- CN111514613A CN111514613A CN202010505317.6A CN202010505317A CN111514613A CN 111514613 A CN111514613 A CN 111514613A CN 202010505317 A CN202010505317 A CN 202010505317A CN 111514613 A CN111514613 A CN 111514613A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D17/02—Separation of non-miscible liquids
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- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
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- C07C45/80—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
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Abstract
The embodiment of the invention provides an alkali liquor separation system and a cyclohexanone preparation system, wherein the alkali liquor separation system comprises a first alkali liquor separator, a first mixer, a second alkali liquor separator, a second mixer and a third alkali liquor separator, wherein the first alkali liquor separator is used for carrying out oil-water separation on a liquid to be separated; a liquid inlet of the first mixer is respectively connected with an oil phase outlet of the first alkali-liquid separator, a water phase outlet of the second alkali-liquid separator and a water phase outlet of the third alkali-liquid separator; a liquid inlet of the second alkali-liquid separator is connected with a liquid outlet of the first mixer; a liquid inlet of the second mixer is respectively connected with an oil phase outlet of the second alkali-liquid separator, a water phase outlet of the third alkali-liquid separator and an external water supply system; the liquid inlet of the third alkali-liquid separator is connected with the liquid outlet of the second mixer. The alkali liquor separation system not only reduces water consumption, but also keeps higher alkali ion removal rate of each alkali liquor separator by recycling and diluting washing water.
Description
Technical Field
The embodiment of the invention relates to the technical field of cyclohexanone preparation, and particularly relates to an alkali liquor separation system and a cyclohexanone preparation system.
Background
Cyclohexanone is an important chemical product and an important raw material for producing adipic acid and caprolactam. At present, the processes for producing cyclohexanone in the world mainly comprise a phenol method, a cyclohexane oxidation method and a cyclohexene method, wherein more than 70% of industrial cyclohexanone manufacturers adopt the cyclohexane oxidation method. The process mainly comprises the steps of oxidation, decomposition, waste alkali separation, alkane rectification, saponification, refining, dehydrogenation, heat recovery and the like, wherein the oxidation step can generate waste alkali liquor, and if the waste alkali liquor enters the alkane rectification process along with materials, the tube of a reboiler can be scaled, so that the heat exchange efficiency of the reboiler is reduced, the power of a cyclohexane recovery system is insufficient, and when the scale of the reboiler is serious to a certain degree, the whole cyclohexanone production system is forced to be stopped and cleaned, so that the energy consumption is increased. Alkali ions in the alkali liquor are a catalyst for organic matter condensation, and if the content of the alkali ions in the materials is high, the organic matter condensation reaction is promoted under the high-temperature condition, so that a large amount of byproducts are produced, and the material consumption is increased. The existing waste alkali separation system has low separation efficiency or large water consumption.
Disclosure of Invention
In view of the above problems in the prior art, embodiments of the present invention provide a lye separation system with low water consumption and high separation efficiency and a cyclohexanone production system using the lye separation system.
In order to achieve the above object, an aspect of the embodiments of the present invention provides a lye separation system, which comprises a first lye separator, a first mixer, a second lye separator, a second mixer and a third lye separator, wherein:
the liquid inlet of the first alkali-liquid separator is used for receiving a liquid to be separated, the liquid to be separated comprises an oil phase, a water phase and alkali ions doped in the oil phase and the water phase, the first alkali-liquid separator is used for carrying out oil-water separation on the liquid to be separated, and the separated water phase in which part of the alkali ions are dissolved is discharged from the water phase outlet of the first alkali-liquid separator;
a liquid inlet of the first mixer is respectively connected with an oil phase outlet of the first alkali-liquid separator, a water phase outlet of the second alkali-liquid separator and a water phase outlet of the third alkali-liquid separator, and the first mixer is used for receiving the oil phase output by the first alkali-liquid separator, the water phase output by the second alkali-liquid separator and the water phase output by the third alkali-liquid separator and mixing the oil phase, the water phase output by the second alkali-liquid separator and the water phase output by the third alkali-liquid separator to dissolve alkali ions in the oil phase into the water phase;
a liquid inlet of the second alkali-liquid separator is connected with a liquid outlet of the first mixer and is used for receiving the oil-water mixed liquid output by the first mixer and carrying out oil-water separation;
a liquid inlet of the second mixer is respectively connected with an oil phase outlet of the second alkali-liquid separator, a water phase outlet of the third alkali-liquid separator and an external water supply system, and the second mixer is used for receiving the oil phase output by the second alkali-liquid separator, the water phase output by the third alkali-liquid separator and fresh water conveyed by the external water supply system and mixing the oil phase output by the second alkali-liquid separator, the water phase output by the third alkali-liquid separator and the fresh water so as to dissolve alkali ions in the oil phase into the water phase;
and the liquid inlet of the third alkali-liquid separator is connected with the liquid outlet of the second mixer and used for receiving the oil-water mixed liquid output by the second mixer, performing oil-water separation on the oil-water mixed liquid, and discharging the separated oil phase from the oil phase outlet of the third alkali-liquid separator.
In some embodiments, the lye separation system further comprises:
and the first infusion pump is connected between the liquid inlet of the first mixer and the water phase outlet of the second alkali-liquid separator and is used for conveying the water phase output by the second alkali-liquid separator to the first mixer.
In some embodiments, the first infusion pump is further connected to an external lye allocation system to deliver a portion of the aqueous phase output by the second alkali-liquid separator to the external lye allocation system.
In some embodiments, the first infusion pump delivers the aqueous phase to the first mixer at a flow rate of 20-50m3H; the flow rate of the water phase conveyed by the first infusion pump to the external alkali liquor preparation system is 4-8m3/h。
In some embodiments, the lye separation system further comprises:
and the second infusion pump is respectively connected with the liquid inlet of the first mixer, the liquid inlet of the second mixer and the water phase outlet of the third alkali-liquid separator and is used for respectively conveying the water phase output by the third alkali-liquid separator to the first mixer and the second mixer.
In some embodiments, the second infusion pump delivers the aqueous phase to the first mixer at a flow rate of 2-6m3The flow rate of the water phase conveyed to the second mixer by the second infusion pump is 20-50m3/h。
In some embodiments, the first, second, and third caustic separators are all caustic wash oil water separator tanks.
In some embodiments, the aqueous phase outlet of the first alkali liquid separator is connected to an external alkali lye formulation system for transporting the aqueous phase with dissolved alkali ions to the external alkali lye formulation system.
In some embodiments, the external water supply delivers fresh water to the second mixer at a flow rate of 1-3m3/h。
In another aspect, the embodiment of the invention further provides a cyclohexanone preparation system, which includes the lye separation system as described above.
Compared with the prior art, in the alkali liquor separation system provided by the embodiment of the invention, after oil-water separation is carried out on a liquid to be separated through the first alkali liquor separator, a water phase is discharged from a water phase outlet of the first alkali liquor separator, an oil phase enters the first mixer to be mixed with washing water of the second alkali liquor separator and washing water of the third alkali liquor separator, and the washing water of the second alkali liquor separator and the washing water of the third alkali liquor separator are recycled, so that the utilization rate of water resources can be saved. And after the oil-water mixture is subjected to oil-water separation through the second alkali-liquid separator, the water phase is discharged from a water phase outlet of the second alkali-liquid separator for cyclic utilization, the oil phase enters the second mixer to be mixed with the washing water of the third alkali-liquid separator and the fresh water of an external water supply system, and the third alkali-liquid separator can be ensured to have higher alkali ion removal rate by supplementing the fresh water. The alkali liquor separation system not only reduces water consumption, but also keeps higher alkali ion removal rate of each alkali liquor separator by recycling and diluting washing water.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.
This patent document provides an overview of various implementations or examples of the technology described in this patent, and is not a comprehensive disclosure of the full scope or all of the features of the technology disclosed.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
FIG. 1 is a schematic diagram of a lye separation system according to an embodiment of the present invention.
Description of reference numerals:
1-a first caustic separator; 2-a first mixer; 3-a second base liquid separator; 4-a second mixer; 5-a third caustic separator; 6-a first infusion pump; 7-second infusion pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
Fig. 1 is a schematic structural diagram of a lye separation system according to an embodiment of the present invention, which is shown in fig. 1 and includes a first lye separator 1, a first mixer 2, a second lye separator 3, a second mixer 4 and a third lye separator 5, wherein:
the liquid inlet of the first alkali-liquid separator 1 is used for receiving a liquid to be separated, and the liquid to be separated comprises an oil phase, a water phase and alkali ions doped in the oil phase and the water phase. Specifically, the liquid to be separated can be a liquid produced in a decomposition link in a cyclohexanone production process, the liquid comprises an oil phase such as cyclohexane and a water phase such as alkali liquor, the alkali ions mainly comprise sodium ions, and the sodium ions are doped in the oil phase and the water phase. The first alkali-liquid separator 1 is used for oil-water separation of a liquid to be separated, and discharging a water phase obtained by separation and dissolved with alkali ions from a water phase outlet of the first alkali-liquid separator 1.
A liquid inlet of the first mixer 2 is respectively connected with an oil phase outlet of the first alkali-liquid separator 1, a water phase outlet of the second alkali-liquid separator 3 and a water phase outlet of the third alkali-liquid separator 5, and the first mixer 2 is used for receiving the oil phase output by the first alkali-liquid separator 1, the water phase output by the second alkali-liquid separator 3 and the water phase output by the third alkali-liquid separator 5 and mixing the three to dissolve alkali ions in the oil phase into the water phase.
A liquid inlet of the second alkali-liquid separator 3 is connected with a liquid outlet of the first mixer 2 and is used for receiving the oil-water mixed liquid output by the first mixer 2 and carrying out oil-water separation.
A liquid inlet of the second mixer 4 is respectively connected with an oil phase outlet of the second alkali-liquid separator 3, a water phase outlet of the third alkali-liquid separator 5 and an external water supply system, and the second mixer 4 is used for receiving the oil phase output by the second alkali-liquid separator 3, the water phase output by the third alkali-liquid separator 5 and fresh water delivered by the external water supply system and mixing the three to dissolve alkali ions in the oil phase into the water phase.
A liquid inlet of the third alkali-liquid separator 5 is connected with a liquid outlet of the second mixer 4, and is used for receiving the oil-water mixed liquid output by the second mixer 4, performing oil-water separation, and discharging the separated oil phase from an oil phase outlet of the third alkali-liquid separator 5. In specific implementation, the first alkali-liquid separator 1, the second alkali-liquid separator 3 and the third alkali-liquid separator 5 may be alkali washing oil-water separation tanks.
By adopting the alkali liquor separation system with the structure, after oil-water separation is carried out on a separation solution through the first alkali liquor separator 1, a water phase is discharged from a water phase outlet of the first alkali liquor separator 1, an oil phase enters the first mixer 2 to be mixed with washing water of the second alkali liquor separator 3 (namely, the water phase obtained by the oil-water separation) and washing water of the third alkali liquor separator 5, and the washing water of the second alkali liquor separator 3 and the washing water of the third alkali liquor separator 5 are recycled, so that the utilization rate of water resources can be saved, and moreover, because the alkali ion concentration in the washing water of the third alkali liquor separator 5 is lower, the effect of diluting the washing water of the second alkali liquor separator 3 can be achieved, so that the second alkali liquor separator 3 has higher alkali ion removal rate. After the oil-water mixture is subjected to oil-water separation through the second alkali-liquid separator 3, the water phase is discharged from the water phase outlet of the second alkali-liquid separator 3 for cyclic utilization, the oil phase enters the second mixer 4 to be mixed with the wash water of the third alkali-liquid separator 5 and the fresh water of the external water supply system, and the third alkali-liquid separator 5 can be ensured to have higher alkali ion removal rate by supplementing the fresh water. The alkali liquor separation system not only reduces water consumption, but also keeps higher alkali ion removal rate of each alkali liquor separator by recycling and diluting washing water.
In some embodiments, the aqueous phase outlet of the first caustic separator 1 may be connected to an external lye formulation system for transporting the aqueous phase with dissolved alkali ions to the external lye formulation system. The external alkali liquor preparation system can be used as an alkali liquor preparation system in a cyclohexanone production system, and the water phase dissolved with alkali ions is conveyed to the external alkali liquor preparation system, so that the alkali ions in the water phase can be recycled, and the material consumption in the cyclohexanone production process can be reduced.
In some embodiments, the lye separation system further comprises a first infusion pump 6, the first infusion pump 6 being connected between the inlet of the first mixer 2 and the aqueous phase outlet of the second lye separator 3 for delivering the aqueous phase output by the second lye separator 3 to the first mixer 2. The first infusion pump 6 can also be connected with an external alkali liquor configuration system to convey part of the water phase output by the second alkali liquor separator 3 to the external alkali liquor configuration system so as to recycle alkali ions in the water phase, and the purpose of diluting the washing water can be well achieved by reducing part of the water phase output by the second alkali liquor separator 3 and supplementing part of the water phase output by the third alkali liquor separator 5, so that the second alkali liquor separator 3 can keep a higher alkali ion removal rate.
In the specific implementation process, the liquid outlet of the first liquid delivery pump 6 can be connected to the first mixer 2 and the external lye allocation system through, for example, a three-way valve, and the flow rate of the aqueous phase flowing to the first mixer 2 and the flow rate of the aqueous phase flowing to the external lye allocation system can be controlled through the three-way valve, so that the second lye separator 3 is ensured to have a higher alkali ion removal rate, and the water consumption is reduced as much as possible.
In a preferred embodiment, the flow rate of the aqueous phase delivered by the first infusion pump 6 to the first mixer 2 may be 20-50m3H, in particular, may be 20m3/h、30m3H or 50m3H; the flow rate of the water phase conveyed by the first infusion pump 6 to the external alkali liquor preparation system is 4-8m3H, in particular, may be 4m3/h、6m3H or 8m3/h。
In some embodiments, the lye separation system further comprises a second infusion pump 7, the second infusion pump 7 being connected to the liquid inlet of the first mixer 2, the liquid inlet of the second mixer 4 and the water phase outlet of the third lye separator 5, respectively, for delivering the water phase output by the third lye separator 5 to the first mixer 2 and the second mixer 4, respectively.
In practical implementation, the liquid outlet of the second infusion pump 7 may be connected to the first mixer 2 and the second mixer 4 through another three-way valve, and the flow rate of the aqueous phase delivered to the first mixer 2 and the second mixer 4 may be controlled through the another three-way valve.
In a preferred embodiment, the second infusion pump 7 delivers the aqueous phase to the first mixer 2 at a flow rate of 2-6m3H, in particular, may be 2m3/h、4m3H or 6m3H; the second infusion pump 7 is mixed to the secondThe flow speed of the mixer 4 for conveying the water phase is 20-50m3H, in particular, may be 20m3/h、30m3H or 50m3/h。
In some embodiments, the flow rate of the fresh water supplied by the external water supply to the second mixer 4 may be 1-3m3H, in particular, may be, for example, 1m3/h、2m3H or 3m3H, etc. After the first alkali-liquid separator 1 and the second alkali-liquid separator 3 are separated, the concentration of alkali ions in the oil phase discharged from the second alkali-liquid separator 3 is already low, fresh water is supplied through an external water supply system, the purpose of diluting the washing water of the third alkali-liquid separator 5 can be achieved, the concentration of alkali ions in the washing water is kept low, and therefore the third alkali-liquid separator 5 is guaranteed to have high alkali ion removal efficiency.
The embodiment of the invention also provides a cyclohexanone preparation system, which comprises the alkali liquor separation system in any one embodiment. During specific implementation, the alkali liquor separation system can be connected between a decomposition process and a rectification process in a cyclohexanone preparation system, feed liquid generated in the decomposition process enters the alkali liquor separation system, and an oil phase from which alkali ions are removed can enter the rectification process for rectification.
Because the alkali liquor separation system has higher alkali ion removal efficiency and lower water consumption, the cyclohexanone preparation system using the alkali liquor separation system also has the advantage of low water consumption, and because the alkali ions are removed more thoroughly, the tube nest scaling of the reboiler is not easy to cause, the overhaul interval of the reboiler can be prolonged, and the cyclohexanone production system can keep a lower energy consumption level, in addition, the organic matter locking reaction can not be caused, the byproduct generation is less, and the material consumption is lower.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above-described embodiments, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (10)
1. An alkali liquor separation system, comprising a first alkali liquor separator, a first mixer, a second alkali liquor separator, a second mixer and a third alkali liquor separator, wherein:
the liquid inlet of the first alkali-liquid separator is used for receiving a liquid to be separated, the liquid to be separated comprises an oil phase, a water phase and alkali ions doped in the oil phase and the water phase, the first alkali-liquid separator is used for carrying out oil-water separation on the liquid to be separated, and the separated water phase in which part of the alkali ions are dissolved is discharged from the water phase outlet of the first alkali-liquid separator;
a liquid inlet of the first mixer is respectively connected with an oil phase outlet of the first alkali-liquid separator, a water phase outlet of the second alkali-liquid separator and a water phase outlet of the third alkali-liquid separator, and the first mixer is used for receiving the oil phase output by the first alkali-liquid separator, the water phase output by the second alkali-liquid separator and the water phase output by the third alkali-liquid separator and mixing the oil phase, the water phase output by the second alkali-liquid separator and the water phase output by the third alkali-liquid separator to dissolve alkali ions in the oil phase into the water phase;
a liquid inlet of the second alkali-liquid separator is connected with a liquid outlet of the first mixer and is used for receiving the oil-water mixed liquid output by the first mixer and carrying out oil-water separation;
a liquid inlet of the second mixer is respectively connected with an oil phase outlet of the second alkali-liquid separator, a water phase outlet of the third alkali-liquid separator and an external water supply system, and the second mixer is used for receiving the oil phase output by the second alkali-liquid separator, the water phase output by the third alkali-liquid separator and fresh water conveyed by the external water supply system and mixing the oil phase output by the second alkali-liquid separator, the water phase output by the third alkali-liquid separator and the fresh water so as to dissolve alkali ions in the oil phase into the water phase;
and the liquid inlet of the third alkali-liquid separator is connected with the liquid outlet of the second mixer and used for receiving the oil-water mixed liquid output by the second mixer, performing oil-water separation on the oil-water mixed liquid, and discharging the separated oil phase from the oil phase outlet of the third alkali-liquid separator.
2. A lye separation system according to claim 1, further comprising:
and the first infusion pump is connected between the liquid inlet of the first mixer and the water phase outlet of the second alkali-liquid separator and is used for conveying the water phase output by the second alkali-liquid separator to the first mixer.
3. A lye separation system according to claim 2 wherein the first infusion pump is further connected to an external lye allocation system for feeding a portion of the aqueous phase output from the second lye separator to the external lye allocation system.
4. A lye separation system according to claim 3 wherein the flow rate at which said first infusion pump delivers the aqueous phase to said first mixer is in the range of from 20 to 50m3H; the flow rate of the water phase conveyed by the first infusion pump to the external alkali liquor preparation system is 4-8m3/h。
5. A lye separation system according to claim 1, further comprising:
and the second infusion pump is respectively connected with the liquid inlet of the first mixer, the liquid inlet of the second mixer and the water phase outlet of the third alkali-liquid separator and is used for respectively conveying the water phase output by the third alkali-liquid separator to the first mixer and the second mixer.
6. A lye separation system according to claim 5 wherein the flow rate at which the second infusion pump delivers the aqueous phase to the first mixer is in the range of from 2 to 6m3The flow rate of the water phase conveyed to the second mixer by the second infusion pump is 20-50m3/h。
7. The lye separation system of claim 1, wherein the first, second and third lye separators are caustic wash oil and water separator tanks.
8. A lye separation system according to claim 1 wherein the aqueous phase outlet of the first lye separator is connected to an external lye formulation system for conveying the aqueous phase having dissolved alkali ions thereto.
9. A lye separation system according to claim 1 wherein the flow rate at which the external water supply system delivers fresh water to the second mixer is from 1 to 3m3/h。
10. A cyclohexanone production system comprising the lye separation system of any one of claims 1 to 9.
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| CN202410716186.4A CN118681272A (en) | 2020-06-05 | 2020-06-05 | Alkali liquor separation system and cyclohexanone preparation system |
| CN202010505317.6A CN111514613A (en) | 2020-06-05 | 2020-06-05 | Alkali liquor separation system and cyclohexanone preparation system |
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| CN202010505317.6A CN111514613A (en) | 2020-06-05 | 2020-06-05 | Alkali liquor separation system and cyclohexanone preparation system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100126938A1 (en) * | 2008-11-27 | 2010-05-27 | Zhishan Bai | Process and apparatus for separating and recovering waste alkali from cyclohexane oxidation solution |
| CN102302868A (en) * | 2011-07-13 | 2012-01-04 | 化学工业第二设计院宁波工程有限公司 | Alkali waste separating device and method in process of preparing cyclohexanone and cyclohexanol by oxidization of cyclohexane |
| CN107433052A (en) * | 2017-08-01 | 2017-12-05 | 湖北兴达石化设备有限公司 | A kind of salkali waste piece-rate system prepared in cyclohexanone technique |
| CN212282983U (en) * | 2020-06-05 | 2021-01-05 | 山东方明化工股份有限公司 | Alkali liquor separation system and cyclohexanone preparation system |
-
2020
- 2020-06-05 CN CN202410716186.4A patent/CN118681272A/en active Pending
- 2020-06-05 CN CN202010505317.6A patent/CN111514613A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100126938A1 (en) * | 2008-11-27 | 2010-05-27 | Zhishan Bai | Process and apparatus for separating and recovering waste alkali from cyclohexane oxidation solution |
| CN102302868A (en) * | 2011-07-13 | 2012-01-04 | 化学工业第二设计院宁波工程有限公司 | Alkali waste separating device and method in process of preparing cyclohexanone and cyclohexanol by oxidization of cyclohexane |
| CN107433052A (en) * | 2017-08-01 | 2017-12-05 | 湖北兴达石化设备有限公司 | A kind of salkali waste piece-rate system prepared in cyclohexanone technique |
| CN212282983U (en) * | 2020-06-05 | 2021-01-05 | 山东方明化工股份有限公司 | Alkali liquor separation system and cyclohexanone preparation system |
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