CN109012037A - A kind of purification separation system of polyphenylene oxide polymerization tail gas - Google Patents
A kind of purification separation system of polyphenylene oxide polymerization tail gas Download PDFInfo
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- CN109012037A CN109012037A CN201810895784.7A CN201810895784A CN109012037A CN 109012037 A CN109012037 A CN 109012037A CN 201810895784 A CN201810895784 A CN 201810895784A CN 109012037 A CN109012037 A CN 109012037A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1406—Multiple stage absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/202—Alcohols or their derivatives
- B01D2252/2021—Methanol
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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Abstract
The present invention relates to a kind of purification separation systems of polyphenylene oxide polymerization tail gas.Including concatenated first absorption tower and second absorption tower, the lower part on the first absorption tower is equipped with the air inlet of polyphenylene oxide polymerization tail gas, and polyphenyl aether tail gas is pressurized laggard tower by booster fan；The top of second absorption tower is equipped with the discharge outlet for absorbing tail gas；The cleaning solution on the first absorption tower is low-carbon alcohols, for absorbing the organic solvent in polyphenylene oxide polymerization tail gas；The cleaning solution of second absorption tower is water, for absorbing the low-carbon alcohols in the tail gas through the washing of the first absorption tower；It is absorbed by the two-stage of the first absorption tower and second absorption tower, the rate of recovery that polyphenylene oxide polymerize organic solvent in tail gas is greater than 99.9%, and organic solvent and low-carbon determining alcohol are below National Emission Standard limit value.The purification separation system of polyphenylene oxide polymerization tail gas can be used cooperatively with homogeneous phase solution condensation methods polyphenylene oxide device is used for and be used cooperatively with for precipitating condensation methods polyphenylene oxide device.
Description
Technical field
The invention belongs to polyphenylene oxide to polymerize tail gas disposal technique field, and in particular to homogeneous phase solution condensation methods or precipitating polycondensation
Method prepares the processing of the polymerization tail gas generated during polyphenylene oxide.
Background technique
Polyphenylene oxide (Polyphenylene ethers or Polyphenylene oxides) abbreviation PPE or PPO be
A kind of important thermoplastic engineering plastic rapidly developed in the latest 20 years, alloy are one of five large-engineering plastics and engineering
The maximum kind of consumption figure in plastic alloy.Since polyphenylene oxide alloy has heat-resisting, high temperature resistant creep properties, fire retardant and self-extinguishment etc. excellent
Good chemistry, physical and mechanical property, therefore its purposes is extremely wide.In auto industry, polyphenylene oxide alloy can be used as automobile
Plate washer, radiator grid, wheel cover, car body panel, instrument board and precision parts etc.；In electronic enterprises, polyphenylene oxide is closed
Gold can be used as instrument precision part, plug-in unit, television set, kinescope inner frame, precision instrument shell and CPU encapsulating material etc.；Furthermore
Polyphenylene oxide alloy also acts as the shell and impeller of water pump, valve body and flowmeter etc..In short, polyphenylene oxide alloy is with extremely wide
Market development prospect.
The industrial synthesis technique of polyphenylene oxide maturation is organic solution method at present, by the difference of its reaction medium, and can be divided
For homogeneous phase solution condensation methods and precipitating condensation methods.Homogeneous phase solution condensation methods are with the organic solvent of polymer (benzene, toluene or chlorobenzene
Deng) it is reaction medium, under copper-amine complex catalyst action, being passed through oxygen keeps the generation coupling of 2,6- xylenol monomer poly-
It closes.After the viscosity for reaching certain, reaction solution is injected in precipitating agent (methanol or ethyl alcohol), resin precipitating is made, using filtering, wash
It washs, dry to get polyphenyl ether product is arrived.Precipitating condensation methods is with organic solvent (benzene, toluene etc.) and precipitating agent (methanol or ethyl alcohol
Deng) mixed liquor be reaction medium, under copper-amine complex catalyst action, be passed through oxygen make 2,6- xylenol monomer be coupled
After polymerization, the polyphenylene oxide particles for reacting generation separate out automatically from solution.Complete reaction mixture is turned after reaction
Enter to cure kettle.After curing kettle the reaction was continued a period of time, end-capping reagent is added and carries out end capping reaction.After the reaction was completed, it was transferred to
Filter is filtered, washs, is dried to obtain polyphenyl ether product.
Whether using homogeneous phase solution condensation methods or precipitate condensation methods synthesis polyphenylene oxide, be required to using organic solvent and
Oxygen.Coupling polymerization reaction belongs to oxidation, polymerization reaction, is exothermic reaction.There is organic solvent steams and oxygen in polymeric kettle
Gas forms the potential danger of explosive mixture, therefore all uses when actual production and be passed through the side that a large amount of nitrogen is diluted
Method forms explosive mixture to avoid organic solvent vapor concentration from reaching explosion limit.The polymerization tail gas temperature that polymeric kettle comes out
25-35 DEG C of degree, pressure 100-120 kPa.The typical concentration of homogeneous phase solution condensation methods are as follows: toluene: 4.5%, water: 0.3%, oxygen:
5.4%, nitrogen: 89.8%.Precipitate the typical concentration of condensation methods are as follows: toluene: 3.1%, methanol: 1.5%, water: 0.7%, oxygen: 5.2%,
Nitrogen: 89.5%.
Polyphenylene oxide polymerize tail gas, and nitrogen gas concn is very high, and organic solvent concentration is substantially more than National Emission Standard, must
It must can be just discharged into atmosphere after processing.Industrial common processing method is using multistage freezing+active carbon adsorption.It is multistage
Freezing+active carbon adsorption is that gas refrigeration to suitable temperature is got off most of organic solvent condensate using freezing liquid,
Then the suction-operated for utilizing active carbon, remaining organic solvent is adsorbed from tail gas.
Summary of the invention
In order to reduce the material consumption and energy consumption of polyphenylene oxide polymerization vent gas treatment, the present invention provides a kind of polyphenylene oxide polymerization tail gas
Purification separation system.
A kind of purification separation system of polyphenylene oxide polymerization tail gas includes concatenated first absorption tower and second absorption tower；It is described
The top on the first absorption tower is equipped with coagulation gas vent, and top is equipped with cleaning solution import, and lower part is equipped with polymerization tail gas air inlet
Mouthful, bottom is equipped with liquid outlet；The top of second absorption tower is exported equipped with high point emptying gas, and top is equipped with washing water inlet, under
Portion is equipped with gas feed, and bottom is equipped with water outlet；
The cleaning solution that first absorption tower uses is low-carbon alcohols, and polyphenylene oxide polymerize tail gas and is pressurized by booster fan by polymerization tail
Gas air inlet enters the first absorption tower, and low-carbon alcohols absorb the organic solvent in polyphenylene oxide polymerization tail gas, obtain coagulation gas；
The cleaning solution that the second absorption tower uses is water, and coagulation gas enters second absorption tower by gas feed, and water is used
Alcohols material in absorption coagulation gas；
It is absorbed by the two-stage of the first absorption tower and second absorption tower, obtained absorption tail gas is directly discharged into atmosphere；The absorption
Organic solvent content in tail gas is lower than 15mg/m3, low-carbon alcohol content be lower than 50 mg/m3, wherein the rate of recovery of organic solvent is big
In 99.9%；
The purification separation system of polyphenylene oxide polymerization tail gas can be used for polyphenylene oxide synthesis homogeneous solution polymerization method technique and
It can be used for the precipitating polymerization technique of polyphenylene oxide synthesis.
The technical solution further limited is as follows:
First absorption tower and second absorption tower are packed tower or plate column.
The low-carbon alcohols are methanol or ethyl alcohol.
Homogeneous phase solution condensation methods polyphenylene oxide device includes polymeric kettle, stillpot and solvent recovering system；It contracts with homogeneous phase solution
When poly- method polyphenylene oxide technique is used cooperatively, after the polyphenylene oxide polymerization offgas outlet of the polymeric kettle is pressurized by booster fan, send
To the polymerization tail gas air inlet on the first absorption tower, the liquid that goes out on the first absorption tower is sent to the solvent recovering system；Second absorption tower
Water outlet be sent to the solvent recovering system.
Precipitating condensation methods polyphenylene oxide device includes polymeric kettle, curing kettle and solvent recovering system；With precipitating condensation methods polyphenyl
When ether technique is used cooperatively, after the polyphenylene oxide polymerization offgas outlet of the polymeric kettle is pressurized by booster fan, send to first and inhale
The polymerization tail gas air inlet of tower is received, the liquid that goes out on the first absorption tower is sent to the solvent recovery mechanism；The water outlet of second absorption tower is sent
Toward the solvent recovering system.
Advantageous effects of the invention embody in the following areas:
1, it is washed as absorbent in polymerization tail gas using low-carbon alcohols the characteristics of present invention polymerize tail gas composition according to polyphenylene oxide
Organic solvent, then use water as absorbent and wash the low-carbon alcohols in coagulation gas.
2, the present invention utilize the existing solvent recovering system of polyphenylene oxide device, in cleaning solution organic solvent, low-carbon alcohols and
Water is recycled, and is recycled.
3, the processing common active carbon adsorption of industrial waste gas containing organic solvent has the disadvantage that at present
1) purifying rate is greater than 95%, but high-concentration waste gas is needed first to carry out to carry out condensing recovery to organic solvent, needs additional
Cooling capacity is provided；
2) for water-containing waste gas, when to prevent from carrying out condensing recovery to organic solvent using refrigerant, ice blockage pipeline is also needed
4A sieve adsorpting bed is arranged to be dehydrated；
3) it needs to regularly replace acticarbon, periodically generates spent sorbents and (belong to hazardous solid waste, need to have sent qualification
Mechanism processing)；
4) according to direct absorption method, active carbon replacement frequently, increases the working procedures such as handling, transport, replacement, causes to run
Expense increases；According to absorption-absorption method, after activated carbon adsorption, blowback need to be carried out to adsorbent bed with superheated steam is introduced, carried out
Desorption and regeneration, then use；
Note: numerical value is relative value in upper table.With consumption of the present invention for 100, if the present invention without this consumption, with condensation+straight
Connecing absorption method consumption is 100.
As can be seen from the above table, the present invention can overcome the disadvantages mentioned above of active carbon adsorption.No matter from investment or object
(the organic solvent rate of recovery), public work consumption, three waste discharge etc. are consumed, has greater advantage compared with active carbon adsorption.
4, organic solvent and low-carbon determining alcohol can be lower than National Pollutant Discharge in the present invention treated discharge exhaust gas
Emission limit in standard, wherein organic solvent is lower than 15mg/m3, low-carbon alcohols are lower than 50mg/m3；
5, the present invention all has good applicability using the polyphenylene oxide polymerization tail gas of organic solvent to various.
Detailed description of the invention
Fig. 1 is the system schematic with homogeneous phase solution condensation methods polyphenylene oxide matched with devices.
Fig. 2 is the system schematic with precipitating condensation methods polyphenylene oxide matched with devices.
Specific embodiment
With reference to the accompanying drawing, the present invention is further described by embodiment.
Embodiment 1
Referring to Fig. 1, homogeneous phase solution condensation methods polyphenylene oxide device includes polymeric kettle, stillpot and solvent recovering system.Of the invention
Polymerizeing tail gas clean-up separation system includes tail gas booster fan, concatenated first absorption tower and second absorption tower system.
Contain nitrogen, oxygen and toluene solvant in processed polyphenylene oxide polymerization tail gas.
First absorption tower is packed tower.The top on the first absorption tower is equipped with coagulation gas vent, and top is equipped with washing
Liquid import, lower part are equipped with polymerization tail gas air inlet, and bottom is equipped with liquid outlet.The polyphenylene oxide polymerization tail gas come out by polymeric kettle passes through
After booster fan pressurization, enter the first absorption tower from polymerization tail gas air inlet；The cleaning solution on the first absorption tower is methanol, and methanol is used
In absorbing the toluene organic solvent in polyphenylene oxide polymerization tail gas, tower top obtains coagulation gas.Solution is inhaled by first after washing
The liquid outlet discharge for receiving tower bottom, into solvent recovering system.Cleaning solution is after solvent recovering system is handled, the toluene of recycling
Solvent returns to polymeric kettle and is recycled, and the methanol fractions of recycling return to stillpot and are recycled, and partially send to the first absorption tower and makees
It is used for washing methanol.
Second absorption tower is packed tower.The top of second absorption tower is equipped with high point drain, and top is equipped with washing water inlet,
Lower part is equipped with gas feed, and bottom is equipped with water outlet.Coagulation gas enters second absorption tower by gas feed.Second absorbs
The cleaning solution of tower is water.Water is used to absorb the methanol through in tail gas at the top of the first absorption tower, obtains the discharge for meeting environmental requirement
Gas.Cleaning solution is sent into solvent recovering system by water outlet, and after solvent recovering system is handled, the methanol fractions of recycling are returned
Stillpot is recycled, and partially send to the first absorption tower and uses as washing methanol.Recycle-water is largely recycled, fraction
Sewage treatment is sent to as waste water.
Polymerization tail gas from polymeric kettle, after being pressurized to 130kPa using booster fan, into the bottom on the first absorption tower.
First absorption tower is packed tower.Methanol absorbing agent enters the first absorption tower from top, after distributor is evenly distributed, sprays downwards
Leaching.First 10 pieces of absorption tower theoretical plate, liquid-gas ratio operate when being greater than 0.15, it is ensured that the toluene solvant concentration in tower top tail gas
Lower than 15ppm, meet the row of atmosphere pollution toluene in " petro chemical industry pollutant emission standard " (GB31571-2015)
Put limit value.
The coagulation gas come out at the top of first absorption tower is entered by the gas feed of second absorption tower.Second absorption tower
It is packed tower.Water absorbent enters second absorption tower from washing water inlet, after distributor is evenly distributed, sprays downwards.The
Two 10 pieces of absorption tower theoretical plates, liquid-gas ratio operate when being greater than 0.85, it is ensured that the methanol solvate concentration in tower top tail gas is lower than
50ppm meets the discharge limit of atmosphere pollution methanol in " petro chemical industry pollutant emission standard " (GB31571-2015)
Value.
Table 1 is using methanol as absorbent, for the embodiment calculated result of typical polyphenylene oxide polymerization tail gas.
It can be seen that polymerization tail gas from the result of upper table to absorb by two-stage, the toluene solvant rate of recovery is greater than 99.9%；Two
Grade absorbs the toluene concentration 11.3mg/m in tail gas after absorbing3, methanol concentration 42.4mg/m3, it is below National Pollutant Discharge mark
(toluene, methanol emissions limit value are 15mg/m respectively for quasi- requirement3And 50mg/m3).
Embodiment 2
Referring to fig. 2, precipitating condensation methods polyphenylene oxide device includes polymeric kettle, curing kettle and solvent recovering system.Polymerization of the invention
Tail gas clean-up separation system includes tail gas booster fan, concatenated first absorption tower and second absorption tower system.
Contain nitrogen, oxygen and toluene solvant in processed polyphenylene oxide polymerization tail gas.
First absorption tower is plate column.The lower part on the first absorption tower is equipped with the air inlet of polyphenylene oxide polymerization tail gas.Polymeric kettle
Polyphenylene oxide polymerization tail gas out enters the first absorption tower from bottom air inlet after booster fan is pressurized；First absorption tower
Cleaning solution be methanol, cleaning solution methanol, methanol be used for absorb polyphenylene oxide polymerization tail gas in toluene organic solvent.First absorbs
The original solvent recovering system of polyphenylene oxide device is sent in tower bottom discharging.After solvent recovering system is handled, the toluene of recycling is molten
Agent and methanol return to polymeric kettle and are recycled, and part methanol send to the first absorption tower and uses as washing methanol.
Second absorption tower is plate column.The lower part of second absorption tower is equipped with the air inlet of tail gas at the top of the first absorption tower.The
Tail gas enters second absorption tower through this air inlet at the top of one absorption tower.The cleaning solution of second absorption tower is water.Water is for absorbing warp
Methanol at the top of first absorption tower in tail gas.Second absorption tower bottom discharge sends to the original solvent recovering system of polyphenylene oxide device.
After solvent recovering system is handled, the methanol fractions of recycling return to polymeric kettle and are recycled, and partially send to the first absorption tower and make
It is used for washing methanol.Recycle-water is largely recycled, and fraction sends to sewage treatment as waste water.
Polymerization tail gas from methyl phenyl ethers anisole polymeric kettle, after being pressurized to 130 kPa using booster fan, into the first absorption tower
Bottom.First absorption tower is packed tower, is also possible to plate column.Methanol absorbing agent enters the first absorption tower from top, passes through
After distributor is evenly distributed, spray downwards.First 10 pieces of absorption tower theoretical plate, liquid-gas ratio operate when being greater than 0.14, it is ensured that
Toluene solvant concentration in tower top tail gas is lower than 15ppm, meets " petro chemical industry pollutant emission standard " (GB31571-
2015) emission limit of atmosphere pollution toluene in.
The tail gas come out at the top of first absorption tower enters second absorption tower bottom.Second absorption tower is packed tower, can also be with
It is plate column.Water absorbent enters second absorption tower from top, after distributor is evenly distributed, sprays downwards.Second absorbs
10 pieces of tower theoretical plate, liquid-gas ratio operates when being greater than 0.85, it is ensured that and the methanol solvate concentration in tower top tail gas is lower than 50ppm,
Meet the emission limit of atmosphere pollution methanol in " petro chemical industry pollutant emission standard " (GB31571-2015).
Table 2 is using methanol as absorbent, for the embodiment calculated result of typical precipitating condensation methods polyphenylene oxide polymerization tail gas.
It can be seen that the toluene solvant in polyphenylene oxide polymerization tail gas from the result of upper table to absorb by two-stage, the rate of recovery is big
In 99.9%；Two-stage absorbs the toluene concentration 12.1mg/m in tail gas after absorbing3, methanol concentration 42.0mg/m3, it is below national dirt
(toluene, methanol emissions limit value are 15 mg/m respectively for the requirement of dye object discharge standard3With 50 mg/m3).
Claims (6)
1. a kind of purification separation system of polyphenylene oxide polymerization tail gas, it is characterised in that: including concatenated first absorption tower and second
Absorption tower；The top on first absorption tower is equipped with coagulation gas vent, and top is equipped with cleaning solution import, and lower part is equipped with poly-
Tail gas air inlet is closed, bottom is equipped with liquid outlet；The top of second absorption tower is exported equipped with high point emptying gas, and top is equipped with washing
Water inlet, lower part are equipped with gas feed, and bottom is equipped with water outlet；
The cleaning solution that first absorption tower uses is low-carbon alcohols；
Polyphenylene oxide, which polymerize tail gas and is pressurized by booster fan, enters the first absorption tower by polymerization tail gas air inlet, and low-carbon alcohols are from first
Absorption tower cleaning solution import enters in tower, absorbs the organic solvent in polyphenylene oxide polymerization tail gas, obtains coagulation gas；
The cleaning solution that the second absorption tower uses is water；
Coagulation gas enters second absorption tower by gas feed, and washing water enters in tower from washing water inlet, for absorbing
Alcohols material in coagulation gas；
It is absorbed by the two-stage of the first absorption tower and second absorption tower, obtained absorption tail gas is directly discharged into atmosphere；The absorption
Organic solvent content in tail gas is lower than 15mg/m3, low-carbon alcohol content be lower than 50 mg/m3, wherein the rate of recovery of organic solvent is big
In 99.9%；
The purification separation system of polyphenylene oxide polymerization tail gas can be used for polyphenylene oxide synthesis homogeneous solution polymerization method technique and
It can be used for the precipitating polymerization technique of polyphenylene oxide synthesis.
2. a kind of purification separation system of polyphenylene oxide polymerization tail gas according to claim 1, it is characterised in that: described first
Absorption tower is packed tower or plate column.
3. a kind of purification separation system of polyphenylene oxide polymerization tail gas according to claim 1, it is characterised in that: described second
Absorption tower is packed tower or plate column.
4. a kind of purification separation system of polyphenylene oxide polymerization tail gas according to claim 1, it is characterised in that: the low-carbon
Alcohol is methanol or ethyl alcohol.
5. a kind of purification separation system of polyphenylene oxide polymerization tail gas according to claim 1, it is characterised in that: homogeneous phase solution
Condensation methods polyphenylene oxide device includes polymeric kettle, stillpot and solvent recovering system；Match with homogeneous phase solution condensation methods polyphenylene oxide technique
Close in use, the polymeric kettle polyphenylene oxide polymerization offgas outlet by booster fan be pressurized after, send to the first absorption tower gathering
Tail gas air inlet is closed, the liquid that goes out on the first absorption tower is sent to the solvent recovering system；The water outlet of second absorption tower is sent to described molten
Agent recovery system.
6. a kind of purification separation system of polyphenylene oxide polymerization tail gas according to claim 1, it is characterised in that: precipitating polycondensation
Method polyphenylene oxide device includes polymeric kettle, curing kettle and solvent recovering system；When being used cooperatively with precipitating condensation methods polyphenylene oxide technique,
After the polyphenylene oxide polymerization offgas outlet of the polymeric kettle is pressurized by booster fan, send to the polymerization tail gas air inlet on the first absorption tower
Mouthful, the liquid that goes out on the first absorption tower is sent to the solvent recovery mechanism；The solvent recovering system is sent in the water outlet of second absorption tower.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111085085A (en) * | 2019-12-10 | 2020-05-01 | 北方天普纤维素有限公司 | Methyl cellulose ether tail gas recovery device and method |
| CN111167264A (en) * | 2020-02-18 | 2020-05-19 | 大连中沐化工有限公司 | Tail gas treatment method for polyphenyl ether production device |
| CN111167265A (en) * | 2020-02-18 | 2020-05-19 | 大连中沐化工有限公司 | Tail gas treatment method for 2, 6-xylenol production device |
| CN115178219A (en) * | 2022-08-08 | 2022-10-14 | 山东亿科化学有限责任公司 | Polymerization device and method with precipitation polycondensation and homogeneous solution polycondensation |
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