CN114797999A - Method for prolonging service life of phenol refined resin in phenol-acetone synthesis - Google Patents
Method for prolonging service life of phenol refined resin in phenol-acetone synthesis Download PDFInfo
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000011347 resin Substances 0.000 title claims abstract description 33
- 229920005989 resin Polymers 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- XDTRNDKYILNOAP-UHFFFAOYSA-N phenol;propan-2-one Chemical compound CC(C)=O.OC1=CC=CC=C1 XDTRNDKYILNOAP-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 15
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001179 sorption measurement Methods 0.000 claims abstract description 26
- 150000001412 amines Chemical class 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 19
- 150000001768 cations Chemical class 0.000 claims abstract description 15
- 238000007670 refining Methods 0.000 claims abstract description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000010926 purge Methods 0.000 claims abstract description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims 2
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000000746 purification Methods 0.000 abstract description 4
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- XLSMFKSTNGKWQX-UHFFFAOYSA-N hydroxyacetone Chemical compound CC(=O)CO XLSMFKSTNGKWQX-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- -1 alpha-methyl phenylpropyl furan Chemical compound 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- OZXIZRZFGJZWBF-UHFFFAOYSA-N 1,3,5-trimethyl-2-(2,4,6-trimethylphenoxy)benzene Chemical compound CC1=CC(C)=CC(C)=C1OC1=C(C)C=C(C)C=C1C OZXIZRZFGJZWBF-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- SHOJXDKTYKFBRD-UHFFFAOYSA-N mesityl oxide Natural products CC(C)=CC(C)=O SHOJXDKTYKFBRD-UHFFFAOYSA-N 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007086 side reaction Methods 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical group C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000003729 cation exchange resin Substances 0.000 description 2
- 229930003836 cresol Natural products 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical group COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 1
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 229960001138 acetylsalicylic acid Drugs 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- ZJMWRROPUADPEA-UHFFFAOYSA-N sec-butylbenzene Chemical compound CCC(C)C1=CC=CC=C1 ZJMWRROPUADPEA-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J47/00—Ion-exchange processes in general; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J49/00—Regeneration or reactivation of ion-exchangers; Apparatus therefor
- B01J49/50—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents
- B01J49/53—Regeneration or reactivation of ion-exchangers; Apparatus therefor characterised by the regeneration reagents for cationic exchangers
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for prolonging the service life of phenol refined resin in phenol acetone synthesis, and belongs to the technical field of phenol acetone synthesis. The method comprises the following steps: organic amine absorption: two absorption towers with adsorbents are connected in series, phenol material flow is introduced into the absorption towers, whether the concentration of amine at the outlet of the first absorption tower is less than 5ppm or not is detected, the second absorption tower is cut off, and single-tower operation is changed; absorption of cations: cleaning the cut absorption tower with pure water, cleaning with sulfuric acid after draining, purging with nitrogen after draining, and cleaning with pure water; detecting the conductivity of the leached water, and when the conductivity is less than 5uS/cm, indicating that the cations in the adsorption tower are completely removed; the treated phenol stream is cut back to the phenol purification unit. According to the invention, two adsorption towers are added in front of the phenol refining bed, and the adsorbent in the adsorption towers can remove cations and organic amine carried in phenol material flow, so that the phenol refining resin is prevented from being polluted, and the service life of the phenol refining resin is prolonged.
Description
Technical Field
The invention relates to the field of phenol-acetone synthesis processes, in particular to a method for prolonging the service life of phenol refined resin in phenol-acetone synthesis.
Background
Phenol (Phenol) is an organic compound, has the chemical formula of C6H5OH, is a colorless needle crystal with special odor, is toxic, and is an important raw material for producing certain resins, bactericides, preservatives and medicines (such as aspirin). In the prior art, the production method of phenol mainly comprises a method for synthesizing phenol acetone by cumene, and the main reaction is shown in the following figure 1.
The advantage of this process is the conversion of the cheaper raw materials benzene and propylene to the more valuable phenol and acetone. Other raw materials used in this are small amounts of catalyst, small amounts of compounds which generate free radicals and oxygen which may be derived from air. The method produces more side products in side reactions, and the side products in phenol mainly comprise cresol substances, alpha-methyl phenylpropyl furan, hydroxy acetone, mesityl oxide and the like. The side reactions are shown in FIG. 2 below.
Cresol substances, alpha-methyl phenylpropane, hydroxyacetone and mesityl oxide in phenol are difficult to separate from phenol and can only be removed by converting the phenol into high-boiling-point substances (i.e. heavy components) by a chemical method. In the prior art, the resin has excellent effect on refining phenol. The resin has the function of reacting alpha-methyl phenylpropyl furan, hydroxy acetone, mesityl oxide and phenol at a certain temperature to produce heavy components, and then the aim of refining phenol is fulfilled. An example of the reaction is shown in FIG. 3 below.
Inactivation factor of phenol refined resin:
1. cation: cations possibly derived from water or materials, such as unqualified desalted water used in resin filling and pretreatment, potassium, sodium, calcium, magnesium and the like in the water exchange with hydrogen ions, so that the hydrogen type exchange capacity of the resin is reduced to influence the catalytic effect.
2. Metal ions: the metal ion is possibly brought from all parts in contact with materials, such as a reactor, a pipeline, a valve and the like, and exchanges with hydrogen ions, so that the hydrogen type exchange capacity of the resin is reduced, and the catalytic effect is influenced.
3. Organic amine substances: the organic amine is an alkaline substance and can generate a neutralization reaction with acid, so that catalytic sites are reduced, and the catalytic performance is reduced.
4. Oxidative degradation: when the resin is contacted with an oxidizing substance such as oxygen, hydrogen peroxide and the like, a reaction similar to the decomposition of cumene hydroperoxide occurs to destroy the structure of the resin, so that the strength is reduced, and the service life of the resin is affected.
In actual production, phenol refined resin has good refining effect on phenol. However, in the present phenol-acetone synthesis process, the cumene synthesis process has certain disadvantages in the process units, namely:
(1) the phenol refined resin has short service life: in actual conditions, the replacement is needed in 8 months, which causes economic loss to factories.
(2) The productivity is influenced: the period for replacing the phenol refined resin is short, and a factory needs to stop to replace the resin, thereby influencing the productivity.
(3) The phenol refined resin can not be recycled: the replaced resin can not be recycled and can only be treated as solid waste. This causes economic losses to the plant and environmental pressures.
Disclosure of Invention
In order to solve the technical defects and shortcomings, the invention aims to provide a method for prolonging the service life of phenol refined resin in a phenol acetone device. A protection unit is added in front of the phenol refining bed to remove cations and organic amine carried in phenol material flow, so that the phenol refining resin is prevented from being polluted, and the service life of the phenol refining resin is prolonged on the premise of not increasing energy consumption.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a method for prolonging the service life of phenol refined resin in phenol acetone synthesis comprises the following steps:
step 1: organic amine absorption:
(1): connecting two absorption towers in series, and filling the pretreated adsorbent into the two absorption towers, wherein the adsorbent is cation exchange resin;
(2): introducing the phenol material flow into two absorption towers connected in series, wherein the flow speed is 1-20BV/h, and the time is more than 24 h;
(3): detecting the amine concentration of phenol material flow at the outlet of the first absorption tower of the two absorption towers connected in series, and when the amine concentration is less than 5ppm, indicating that the organic amine is completely absorbed, at the moment, cutting out the second absorption tower, and changing the operation of the first absorption tower into the operation of a single tower;
step 2: absorption of cations:
(1): cleaning the cut second absorption tower with 1BV of pure water in a mode of feeding in and discharging out from the lower part;
(2): draining the pure water from the second absorption tower, and cleaning for 1-3BV by using 4% sulfuric acid after draining, wherein the flow rate is the same as that of the pure water in the step (1);
(3): draining sulfuric acid from the second absorption tower, purging the interior of the second absorption tower by using nitrogen after draining, and then cleaning by using pure water with the flow rate being more than 5 BV;
(4): detecting the conductivity of the leached water, and when the conductivity is less than 5uS/cm, indicating that the cations in the adsorption tower are completely removed;
(5): and the treated phenol material flow is cut back to the phenol refining unit after the first absorption tower.
As a preferred example, the phenol stream introduced into the absorption column is operated in a manner of bottom-in-top-out.
As a preferred example, in step 1, the flow rate of the phenol stream into the two absorption columns connected in series is 8 to 20 BV/h.
As a preferable example, when the second absorption tower cut out in the step 2(1) is washed with 1BV of pure water in a manner of going in and out, the flow rate is 1-2 BV/h.
As a preferable example, in the step 2(2), pure water is drained from the second absorption tower, and after the drainage, the pure water is washed with 4% sulfuric acid for 1 to 1.5 BV.
The invention has the beneficial effects that:
according to the invention, a protection unit is added in front of the phenol refining bed, the protection unit consists of two absorption towers connected in series, and the adsorbent in the absorption towers can remove cations and organic amine carried in phenol material flow, so that the phenol refining resin is prevented from being polluted, and the service life of the phenol refining resin is prolonged on the premise of not increasing energy consumption.
Drawings
FIG. 1 is a schematic diagram of the main reaction of cumene to phenol acetone;
FIG. 2 is a schematic diagram of a side reaction of cumene to phenol acetone;
FIG. 3 is a schematic diagram of an example of a resin catalyzed phenol acetone synthesis reaction;
FIG. 4 is a process schematic flow diagram of the present invention.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the invention easy to understand, the invention is further described with reference to the specific drawings and the embodiments.
The first embodiment is as follows:
100L of adsorbent with the adsorption capacity of 1mol/L is filled into two absorption towers which are connected in series, the absorbent is cation exchange resin and can exchange with organic amine and cations, then 380L of phenol material flow with the organic amine content of 300ppm passes through the two absorption towers which are connected in series from bottom to top, the flow rate is 8-12BV/h, and the time is more than 24 hours.
The organic amine content was found to be 2 ppm; at the moment, the operation of the first adsorption tower and the single tower is changed.
The cut-out second adsorption column was washed with 1BV of pure water in a manner of up-and-down. Then after the pure water is drained, the solution is washed by 4 percent sulfuric acid for 1 to 1.5BV with the same flow rate. And (3) draining 4% sulfuric acid, purging the second adsorption tower by using nitrogen, and then cleaning the second adsorption tower by using pure water with the flow rate being higher than 5BV until the conductivity of the leached water in the second adsorption tower is lower than 5 uS/cm. This indicates complete cation removal in the adsorption column.
The treated phenol stream flow was then replaced with 2BV and switched back to the phenol purification unit after the first absorption column.
Example two:
filling 100L of adsorbent with the adsorption capacity of 1mol/L into two absorption towers which are connected in series, and then enabling 500L of phenol material flow with the organic amine content of 300ppm to pass through the two absorption towers which are connected in series from bottom to top, wherein the flow rate is 8-12BV/h, and the time is more than 24 hours.
The organic amine content was found to be 3 ppm; at the moment, the operation of the first adsorption tower and the single tower is changed.
The cut-out second adsorption column was washed with 1BV of pure water in a manner of up-and-down. Then after the pure water is drained, the solution is washed by 4 percent sulfuric acid for 1 to 1.5BV with the same flow rate. And (3) draining 4% sulfuric acid, purging the second adsorption tower by using nitrogen, and then cleaning the second adsorption tower by using pure water with the flow rate being higher than 5BV until the conductivity of the leached water in the second adsorption tower is lower than 5 uS/cm. This indicates complete cation removal in the adsorption column.
The treated phenol stream flow was then replaced with 2BV and switched back to the phenol purification unit after the first absorption column.
Example three:
100L of adsorbent with the adsorption capacity of 1mol/L is filled into two absorption towers which are connected in series, and then 760L of phenol material flow with the organic amine content of 300ppm passes through the two absorption towers which are connected in series from bottom to top, the flow rate is 8-12BV/h, and the time is more than 48 hours.
The organic amine content was found to be 2 ppm; at the moment, the operation of the first adsorption tower and the single tower is changed.
The cut-out second adsorption column was washed with 1BV of pure water in a manner of up-and-down. Then after the pure water is drained, the solution is washed by 4 percent sulfuric acid for 1 to 1.5BV with the same flow rate. And (3) draining 4% sulfuric acid, purging the second adsorption tower by using nitrogen, and then cleaning the second adsorption tower by using pure water with the flow rate being higher than 5BV until the conductivity of the leached water in the second adsorption tower is lower than 5 uS/cm. This indicates complete cation removal in the adsorption column.
The treated phenol stream flow was then replaced with 2BV and switched back to the phenol purification unit after the first absorption column.
Wherein, the phenol material flow in the three embodiments comes from phenol acetone prepared by UOP process, and FIG. 4 is a process principle flow chart of the invention.
In summary, the experimental data after the test shows that the service life of the phenol refined resin can be remarkably prolonged as long as the phenol material flow enters the phenol refining unit under the conditions that the organic amine content of the phenol material flow is less than 5ppm and the conductivity is less than 5 uS/cm.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. A method for prolonging the service life of phenol refined resin in phenol acetone synthesis is characterized by comprising the following steps:
step 1: organic amine absorption:
(1): connecting two absorption towers in series, and filling the pretreated adsorbent into the two absorption towers;
(2): introducing the phenol material flow into two absorption towers connected in series, wherein the flow speed is 1-20BV/h, and the time is more than 24 h;
(3): detecting the amine concentration of phenol material flow at the outlet of the first absorption tower of the two absorption towers connected in series, and when the amine concentration is less than 5ppm, indicating that the organic amine is completely absorbed, at the moment, cutting out the second absorption tower, and changing the operation of the first absorption tower into the operation of a single tower;
step 2: absorption of cations:
(1): cleaning the cut second absorption tower with 1BV of pure water in a mode of feeding in and discharging out from the lower part;
(2): draining the pure water from the second absorption tower, and cleaning for 1-3BV by using 4% sulfuric acid after draining, wherein the flow rate is the same as that of the pure water in the step (1);
(3): draining sulfuric acid from the second absorption tower, purging the interior of the second absorption tower by using nitrogen after draining, and then cleaning by using pure water with the flow rate being more than 5 BV;
(4): detecting the conductivity of the leached water, and when the conductivity is less than 5uS/cm, indicating that the cations in the adsorption tower are completely removed;
(5): and the treated phenol material flow is cut back to the phenol refining unit after the first absorption tower.
2. The method for prolonging the service life of phenol refined resin in phenol acetone synthesis according to claim 1, wherein the phenol stream introduced into the absorption tower is operated in a mode of bottom-in top-out.
3. The method for prolonging the service life of the refined phenol resin in the synthesis of phenol and acetone as claimed in claim 1, wherein the flow rate of the phenol material flow into the two absorption towers connected in series in the step 1 is 8-20 BV/h.
4. The method for prolonging the service life of phenol refined resin in the synthesis of phenol and acetone as claimed in claim 1, wherein the flow rate of the second absorption tower cut out in step 2(1) is 1-2BV/h when the second absorption tower is cleaned with 1BV of pure water in a manner of going in and out from the tower.
5. The method for prolonging the service life of the refined phenol resin in the synthesis of phenol and acetone as claimed in claim 1, wherein in step 2(2), pure water is drained from the second absorption tower, and after draining, the pure water is washed with 4% sulfuric acid for 1-1.5 BV.
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Denomination of invention: A method for extending the service life of phenol refining resin in the synthesis of phenol and acetone Granted publication date: 20231110 Pledgee: Agricultural Bank of China Limited Shanghai Yangtze River Delta Integrated Demonstration Zone Sub branch Pledgor: Yingporui Intelligent Technology (Shanghai) Co.,Ltd. Registration number: Y2024310000171 |