CN114797999B - 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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- CN114797999B CN114797999B CN202210367411.9A CN202210367411A CN114797999B CN 114797999 B CN114797999 B CN 114797999B CN 202210367411 A CN202210367411 A CN 202210367411A CN 114797999 B CN114797999 B CN 114797999B
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000011347 resin Substances 0.000 title claims abstract description 36
- 229920005989 resin Polymers 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 22
- 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 19
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 18
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 18
- 238000010521 absorption reaction Methods 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000007670 refining Methods 0.000 claims abstract description 30
- 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 24
- 150000001768 cations Chemical class 0.000 claims abstract description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003463 adsorbent Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000010926 purge Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 2
- 239000008213 purified water Substances 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 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
- 239000006096 absorbing agent Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 230000003197 catalytic effect Effects 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
- -1 alpha-methyl styrene-furan Chemical compound 0.000 description 3
- 230000000694 effects Effects 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
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-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
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 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
- 229920001909 styrene-acrylic polymer Polymers 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
- 229960001138 acetylsalicylic acid Drugs 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 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
- 238000009835 boiling Methods 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
- 230000009849 deactivation Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 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
- 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
- 150000003254 radicals Chemical class 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
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a method for prolonging the service life of phenol refined resin in phenol-acetone synthesis, belonging 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 flow is sent into the absorption towers, whether the concentration of amine at the outlet of the first absorption tower is less than 5ppm is detected, and the second absorption tower is cut out and is changed into single-tower operation; absorption of cations: the cut absorption tower is cleaned by pure water, cleaned by sulfuric acid after being drained, and then cleaned by pure water after being drained by nitrogen purging; detecting the conductivity of the leached water, and when the conductivity is smaller than 5uS/cm, indicating that the cation in the adsorption tower is completely removed; the treated phenol stream is switched back to the phenol refining 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 pollution to phenol refining resin is prevented, and the service life of the phenol refining resin is prolonged.
Description
Technical Field
The invention relates to the field of phenol-acetone synthesis technology, 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 with a chemical formula of C6H5OH, is colorless needle-like crystals 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 phenol production method mainly adopts a phenol-acetone method by cumene synthesis, and the main reaction is shown in the following figure 1.
The advantage of this process is that cheaper raw materials benzene and propylene are converted to more valuable phenol and acetone. Other raw materials used in this are small amounts of catalyst, small amounts of free radical generating compounds and oxygen which may come from air. The method has a plurality of byproducts generated by side reactions, and the byproducts in the phenol mainly comprise cresol substances, alpha-methyl styrene-acrylic furan, hydroxyacetone, mesityl oxide and the like. The side reactions are shown in FIG. 2 below.
Cresol, alpha-methyl styrene-furan, hydroxy acetone, mesityl oxide, etc. in phenol are difficult to separate from phenol and can only be removed by chemical means to convert them to high boiling point substances (i.e. heavy components). In the prior art, the resin has excellent effect on refining phenol. The resin has the function of realizing the purpose of phenol refining after the alpha-methyl styrene-acrylic furan, hydroxy acetone, mesityl oxide and phenol react at a certain temperature to produce heavy components. Examples of reactions are shown in FIG. 3 below.
Phenol refining resin deactivation factor:
1. cation: the cations in water or materials, such as unqualified desalted water used in resin filling and pretreatment, and substances such as potassium, sodium, calcium, magnesium and the like in water exchange with hydrogen ions, so that the hydrogen exchange capacity of the resin is reduced to influence the catalytic effect.
2. Metal ions: the metal ions are possibly carried in from all parts contacted with materials such as a reactor, a pipeline, a valve and the like and exchange with hydrogen ions, so that the hydrogen exchange capacity of the resin is reduced to influence the catalytic effect.
3. Organic amine substance: the organic amine is alkaline substance, and can be neutralized with acid, so that catalytic sites are reduced, and catalytic performance is lowered.
4. Oxidative degradation: the resin is contacted with an oxidizing substance such as oxygen, hydrogen peroxide, etc., and a reaction similar to the decomposition of cumene hydroperoxide occurs to destroy the structure of the resin, thereby reducing the strength and affecting the service life of the resin.
In actual production, the phenol refining resin has a good refining effect on phenol. However, in the current phenol acetone synthesis process, the cumene synthesis process device has certain defects that:
(1) The service life of the phenol refining resin is shorter: in practical cases, the replacement is needed in 8 months, and economic loss is caused to factories.
(2) Influence the productivity: the period of replacing the phenol refining resin is short, and the factory needs to stop to replace the resin, thereby affecting the productivity.
(3) The phenol-refined resin cannot be recycled: the replaced resin cannot 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 protecting unit is added in front of the phenol refining bed to remove cations and organic amine carried in phenol material flow, prevent pollution to phenol refining resin and prolong the service life of the phenol refining resin without increasing energy consumption.
The technical problems to be solved by the invention are 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): the two absorption towers are connected in series, the pretreated adsorbent is filled into the two absorption towers, and the adsorbent is cation exchange resin;
(2): the phenol material flow is sent into two absorption towers which are connected in series, the flow speed is 1-20BV/h, and the time is more than 24h;
(3): detecting the amine concentration of the phenol stream 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, 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): the cut second absorption tower is cleaned by pure water of 1BV in a mode of entering from below and exiting from above;
(2): draining pure water from the second absorption tower, and cleaning 1-3BV with 4% sulfuric acid after draining, wherein the flow rate is the same as the pure water in step (1);
(3): draining sulfuric acid from the second absorption tower, purging the inside of the second absorption tower by adopting nitrogen after draining, and then cleaning by using pure water with the flow rate of more than 5BV, wherein the flow rate is the same as the above;
(4): detecting the conductivity of the leached water, and when the conductivity is smaller than 5uS/cm, indicating that the cation in the adsorption tower is completely removed;
(5): the treated phenol stream is switched back to the phenol refining unit after the first absorber.
As a preferred example, the phenol stream introduced into the absorber column is operated with a lower inlet and upper outlet.
As a preferred example, in step 1, the flow rate of the phenol stream in two absorption towers connected in series is 8-20BV/h.
As a preferred example, the flow rate of the second absorption column cut in step 2 (1) is 1-2BV/h when it is washed with 1BV of pure water in the manner of going in and out from below.
As a preferred example, in the step 2 (2), pure water is drained from the second absorption column, and after draining, 1 to 1.5BV is washed with 4% sulfuric acid.
The beneficial effects of the invention are as follows:
according to the invention, the protection unit is added in front of the phenol refining bed, the protection unit consists of two absorption towers which are connected in series, the adsorbent in the absorption towers can remove cations and organic amine carried in phenol material flow, the pollution to phenol refining resin is prevented, 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 the cumene synthesis phenol-acetone process;
FIG. 2 is a schematic diagram of the side reaction of the cumene synthesis phenol-acetone process;
FIG. 3 is a schematic illustration of an example reaction for resin catalyzed synthesis of phenol-acetone;
fig. 4 is a flow chart of the process principle of the invention.
Detailed Description
The invention will be further described with reference to the following detailed drawings and examples, in order to make the technical means, the creation features, the achievement of the objects and the effects of the invention easily understood.
Embodiment one:
100L of adsorbent with adsorption capacity of 1mol/L is filled into two absorption towers which are connected in series, the adsorbent is cation exchange resin and can exchange with organic amine and cation, and then 380L of phenol material flow with organic amine content of 300ppm is passed through 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 measured to be 2ppm; at this time, the operation is changed into the operation of the first adsorption tower with a single tower.
The cut second adsorption tower was washed with 1BV pure water in the lower inlet and upper outlet mode. Then, after pure water is drained, the pure water is washed by using 4% sulfuric acid for 1-1.5BV, and the flow rate is the same as the above. And after the 4% sulfuric acid is drained, purging the second adsorption tower by nitrogen, and then cleaning the second adsorption tower by pure water with the flow rate higher than 5BV until the conductivity of the leached effluent in the second adsorption tower is lower than 5uS/cm. This indicates complete removal of cations in the adsorption column.
The treated phenol stream flow was then replaced with 2BV and switched back to the phenol refining unit after the first absorber.
Embodiment two:
100L of adsorbent with adsorption capacity of 1mol/L is filled into two absorption towers which are connected in series, and then 500L of phenol flow with organic amine content of 300ppm is passed 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 measured to be 3ppm; at this time, the operation is changed into the operation of the first adsorption tower with a single tower.
The cut second adsorption tower was washed with 1BV pure water in the lower inlet and upper outlet mode. Then, after pure water is drained, the pure water is washed by using 4% sulfuric acid for 1-1.5BV, and the flow rate is the same as the above. And after the 4% sulfuric acid is drained, purging the second adsorption tower by nitrogen, and then cleaning the second adsorption tower by pure water with the flow rate higher than 5BV until the conductivity of the leached effluent in the second adsorption tower is lower than 5uS/cm. This indicates complete removal of cations in the adsorption column.
The treated phenol stream flow was then replaced with 2BV and switched back to the phenol refining unit after the first absorber.
Embodiment III:
100L of adsorbent with adsorption capacity of 1mol/L is filled into two absorption towers which are connected in series, 760L of phenol flow with organic amine content of 300ppm is then passed 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 measured to be 2ppm; at this time, the operation is changed into the operation of the first adsorption tower with a single tower.
The cut second adsorption tower was washed with 1BV pure water in the lower inlet and upper outlet mode. Then, after pure water is drained, the pure water is washed by using 4% sulfuric acid for 1-1.5BV, and the flow rate is the same as the above. And after the 4% sulfuric acid is drained, purging the second adsorption tower by nitrogen, and then cleaning the second adsorption tower by pure water with the flow rate higher than 5BV until the conductivity of the leached effluent in the second adsorption tower is lower than 5uS/cm. This indicates complete removal of cations in the adsorption column.
The treated phenol stream flow was then replaced with 2BV and switched back to the phenol refining unit after the first absorber.
Wherein the phenol stream material in the three embodiments is from UOP process to prepare phenol acetone, and FIG. 4 is a process schematic flow chart of the invention.
In conclusion, experimental data after testing shows that the service life of the phenol refining resin can be remarkably prolonged as long as the phenol material flow has the organic amine content of less than 5ppm and the conductivity of less than 5uS/cm and then enters the phenol refining unit.
The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall 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, which is characterized by comprising the following steps:
step 1: organic amine absorption:
(1): connecting the two absorption towers in series, and filling the pretreated adsorbent into the two absorption towers;
(2): the phenol material flow is sent into two absorption towers which are connected in series, the flow speed is 1-20BV/h, and the time is more than 24h;
(3): detecting the amine concentration of the phenol stream 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, cutting out the second absorption tower, and changing the operation of the first absorption tower into the operation of a single tower;
step 2:
(1): the cut second absorption tower is cleaned by pure water of 1BV in a mode of entering from below and exiting from above;
(2): draining pure water from the second absorption tower, and cleaning 1-3BV with 4% sulfuric acid after draining, wherein the flow rate is the same as the pure water in step (1);
(3): draining sulfuric acid from the second absorption tower, purging the inside of the second absorption tower by adopting nitrogen after draining, and then cleaning by using pure water with the flow rate of more than 5BV, wherein the flow rate is the same as the above;
(4): detecting the conductivity of the leached water, and when the conductivity is smaller than 5uS/cm, indicating that the cation in the adsorption tower is completely removed;
step 3:
and (2) switching the phenol stream treated in the step (1) back to the phenol refining unit after the first absorption tower, ensuring that the phenol stream has the organic amine content of less than 5ppm and enters the phenol refining unit under the condition that the conductivity is less than 5uS/cm, and prolonging the service life of the phenol refining resin.
2. The method for prolonging the service life of phenol refining resin in phenol-acetone synthesis according to claim 1, wherein the phenol stream introduced into the absorption tower is operated in a mode of lower inlet and upper outlet.
3. The method for prolonging the service life of phenol refining resin in phenol-acetone synthesis according to claim 1, wherein in step 1, the flow rate of the phenol stream in two absorption towers connected in series is 8-20BV/h.
4. The method for prolonging the service life of phenol refining resin in phenol-acetone synthesis according to claim 1, wherein the flow rate of the second absorption tower cut in step 2 (1) is 1-2BV/h when the second absorption tower is washed with 1BV pure water in a mode of lower inlet and upper outlet.
5. The method for prolonging the service life of phenol refining resin in phenol-acetone synthesis according to claim 1, wherein in step 2 (2), pure water is drained from the second absorption tower, and the purified water is washed with 4% sulfuric acid for 1-1.5BV.
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Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050137429A1 (en) * | 2003-12-18 | 2005-06-23 | Tatake Prashant A. | Methods for purification of phenol |
| EP2240428B1 (en) * | 2007-12-20 | 2015-06-24 | Borealis Technology Oy | Treatment of phenol |
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2022
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|---|---|---|---|---|
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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 |