CN107789855A - Acyl chlorides rectification under vacuum waste water reclaiming device and method - Google Patents

Acyl chlorides rectification under vacuum waste water reclaiming device and method Download PDF

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Publication number
CN107789855A
CN107789855A CN201711242202.7A CN201711242202A CN107789855A CN 107789855 A CN107789855 A CN 107789855A CN 201711242202 A CN201711242202 A CN 201711242202A CN 107789855 A CN107789855 A CN 107789855A
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water
acyl chlorides
alkali lye
tank
gas
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CN107789855B (en
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刘嵩
张良
谢圣斌
肖广明
常莹
王廷
孙丰春
张善民
周勇
毕义霞
王荣海
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Shandong Kaisheng New Materials Co Ltd
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Shandong Kaisheng New Materials Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/10—Vacuum distillation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/14—Fractional distillation or use of a fractionation or rectification column
    • B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
    • 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
    • B01D53/1456—Removing acid components
    • 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
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/68—Halogens or halogen compounds
    • B01D53/70—Organic halogen compounds
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/79—Injecting reactants
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/58—Preparation of carboxylic acid halides
    • C07C51/64—Separation; Purification; Stabilisation; Use of additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/60—Inorganic bases or salts
    • B01D2251/604—Hydroxides
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/204—Inorganic halogen compounds
    • B01D2257/2045—Hydrochloric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/20—Halogens or halogen compounds
    • B01D2257/206—Organic halogen compounds
    • B01D2257/2064—Chlorine

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Organic Chemistry (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Abstract

The present invention relates to a kind of acyl chlorides rectification under vacuum waste water reclaiming device and method, belong to technical field of wastewater recovery.The device includes rectifier unit and vacuum pump set, and vacuum buffer tank is connected between rectifier unit and vacuum pump set；Vacuum pump set includes lobe pump, water jet device and alkali lye injection apparatus.A water jet device is further added by traditional acyl chlorides vacuum pump set, solves the problems, such as that thionyl chloride enters unit and produces sodium chloride and sodium sulfite blending salt with alkali lye well, avoids the generation of high-salt wastewater, while reduces cost, method is simple.

Description

Acyl chlorides rectification under vacuum waste water reclaiming device and method
Technical field
The present invention relates to a kind of acyl chlorides rectification under vacuum waste water reclaiming device and method, belong to technical field of wastewater recovery.
Background technology
Acyl chlorides is a kind of compound for containing-C (O) Cl functional groups, belongs to one kind of carboxylic acid halides, has corrosivity, be carboxylic acid In hydroxyl substituted by chlorine after the carboxylic acid derivates that are formed.Common acyl chlorides has：Between/paraphthaloyl chloride, p-nitrophenyl formyl Chlorine, chloracetyl chloride.
It is when manufacturing enterprise of China mainly uses thionyl chloride method or phosgenation, wherein thionyl chloride method production acyl chlorides at present The conversion ratio of raw material acid is ensured, reaction process thionyl chloride puts into be excessive, therefore reacted crude acid chloride is still containing certain Measure thionyl chloride.Acyl chlorides refining step needs to carry out under high vacuum operating mode, typically using lobe pump and jet pump composition vacuum Unit provides the high vacuum operating mode needed for acyl chlorides refining step, and jet pump circulation fluid is generally liquid caustic soda.Vacuum pump set is made During industry, the thionyl chloride that contains eventually enters into alkali lye jet pump and mixes shape with circulation fluid in the vacuum gas extracted out from distillation system Into sodium chloride-containing, the solution of sodium sulfite, these high-salt wastewaters can not recycle, and can only be discharged into sewage disposal system and be steamed The operation such as hair concentration, dry is separated, and the sodium chloride and sodium sulfite mixed salt isolated do solid waste processing, and increase is produced into This.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of acyl chlorides rectification under vacuum waste water reclaiming device, keep away Exempt from the generation of high-salt wastewater；There is provided method simultaneously.
A kind of acyl chlorides rectification under vacuum waste water reclaiming device of the present invention, including be sequentially connected rectifier unit, vacuum Surge tank and vacuum pump set；
The vacuum pump set includes lobe pump, water jet device and alkali lye injection apparatus, and Roots's pump steam inlet delays with vacuum Tank connection is rushed, lobe pump gas outlet connects with water jet device and alkali lye injection apparatus successively；
The water jet device includes water ejector, water-circulating pump and water circulation tank；Water circulation pot bottom connects water circulation Pump, connection water-circulating pump connection water ejector；Water ejector connection water circulation tank top；
The alkali lye injection apparatus includes alkali lye injector, lye tank and NaOH solution circulating pump, lye tank liquid outlet connection alkali Liquid circulating pump, NaOH solution circulating pump are connected with alkali lye injector, and alkali lye injector at the top of lye tank with being connected；
The lobe pump gas outlet is connected with water ejector, and water circulation tank top connects with alkali lye injector.
Acyl chlorides rectifier unit includes acyl chlorides rectifying column, condenser and gas-liquid separator, acyl chlorides rectifying column top and condenser Top is connected, and condenser bottom at the top of gas-liquid separator with connecting, and condenser bottom at the top of gas-liquid separator with connecting, gas-liquid point It is connected from device with vacuum buffer tank top.
Preferably, lobe pump is cascaded for 2.
Vacuum buffer tank is with cooling chuck.
A kind of acyl chlorides rectification under vacuum method for reclaiming waste water of the present invention, comprises the following steps：
1) enter after the condensed device condensation of material from acyl chlorides rectifying column out in gas-liquid separator and carry out gas-liquid separation, Liquid phase material is entered in acyl chlorides rectifying column, and gaseous phase materials enter vacuum buffer tank cooling and remove acyl chlorides, obtain secondary gaseous phase materials；
2) secondary gaseous phase materials enter Roots's pump steam inlet, enter water from the secondary gaseous phase materials of lobe pump gas outlet discharge Water in water circulation tank is drawn through pipeline feed water ejector by injector, water-circulating pump, the chlorine in secondary gaseous phase materials Change sulfoxide and mix generation hydrogen chloride and sulfur dioxide with water in water ejector into water circulation tank, most of hydrogen chloride gas quilt Water absorbs, and remaining gaseous phase materials enter in alkali lye injector；
3) alkali lye in lye tank is drawn through pipeline and gives alkali lye injector, remaining gaseous phase materials by NaOH solution circulating pump Into alkali lye injector, mixed with alkali lye to lye tank, sulfur dioxide is by alkali liquor absorption.
Circulation fluid is a water in water circulation tank.
The temperature control of vacuum buffer tank is at 0 DEG C -10 DEG C.
Alkali lye is sodium hydroxide solution.
Concentration of hydrochloric acid control is below 10% in step (2) reclaimed water circulating tank.
In actual production, the batch acyl chlorides about used time 30h of rectifying one, it is 3t to produce high-salt wastewater amount, and often covering rectifier unit can Emission reduction high-salt wastewater amount about 72t, high-salt wastewater processing cost are about 270 yuan/t, monthly save high-salt wastewater processing cost about 20000 yuan.The wherein mixed salt of high-salt wastewater content about 3% or so, DTRO films infiltration+multiple-effect evaporation wastewater treatment expense per ton is about 120 yuan, about 5000 yuan/t of mixed salt fixed-end forces expense.
Compared with prior art, the present invention has advantages below：
A water jet device is further added by traditional acyl chlorides vacuum pump set, thionyl chloride is solved well and enters unit The problem of producing sodium chloride and sodium sulfite blending salt with alkali lye, avoids the generation of high-salt wastewater, while reduces cost, side Method is simple and easy to do.
Brief description of the drawings
Fig. 1 is the acyl chlorides rectification under vacuum waste water reclaiming device schematic diagram of the present invention.
In figure：1st, acyl chlorides rectifying column；2nd, condenser；3rd, gas-liquid separator；4th, vacuum buffer tank；5th, lobe pump；6th, water sprays Emitter；7th, water-circulating pump；8th, water circulation tank；9th, alkali lye injector；10th, lye tank；11st, NaOH solution circulating pump.
Embodiment
With reference to embodiment, the present invention will be further described.
Embodiment 1
A kind of acyl chlorides rectification under vacuum waste water reclaiming device of the present embodiment, refer to the attached drawing 1, including the rectifying dress being sequentially connected Put, vacuum buffer tank 4 and vacuum pump set；The vacuum pump set includes lobe pump 5, water jet device and alkali lye injection apparatus, sieve The air inlet of thatch pump 5 connects with vacuum buffer tank 4, and the gas outlet of lobe pump 5 connects with water jet device and alkali lye injection apparatus successively； The water jet device includes water ejector 6, water-circulating pump 7 and water circulation tank 8；The bottom of water circulation tank 8 connects water-circulating pump 7, Water-circulating pump 7 connects water ejector 6, and water ejector 6 connects the top of water circulation tank 8；The alkali lye injection apparatus sprays including alkali lye Emitter 9, lye tank 10 and NaOH solution circulating pump 11；Alkali lye injector 9 is connected with the top of lye tank 10, the connection of the liquid outlet of lye tank 10 NaOH solution circulating pump 11, NaOH solution circulating pump 11 are connected with alkali lye injector 9；The gas outlet of lobe pump 5 is connected with water ejector 6, The top of water circulation tank 8 connects with alkali lye injector 9；Acyl chlorides rectifier unit includes acyl chlorides rectifying column 1, condenser 2 and gas-liquid separation Device 3, the top of acyl chlorides rectifying column 1 are connected with the top of condenser 2, and the bottom of condenser 2 connects with the top of gas-liquid separator 3, condenser 2 Bottom connects with the top of gas-liquid separator 3, and gas-liquid separator 3 is connected with the top of vacuum buffer tank 4.
A kind of acyl chlorides rectification under vacuum method for reclaiming waste water, comprises the following steps：
1) the condensed device 2 of material from acyl chlorides rectifying column 1 out enters after condensing carries out gas-liquid point in gas-liquid separator 3 From liquid phase material is entered in acyl chlorides rectifying column 1, and gaseous phase materials enter the cooling of vacuum buffer tank 4 that temperature is 0 DEG C and remove acyl Chlorine, obtain secondary gaseous phase materials；
2) secondary gaseous phase materials enter the air inlet of lobe pump 5, enter from the secondary gaseous phase materials of the gas outlet of lobe pump 5 discharge Water in water circulation tank 8 is drawn through pipeline feed water ejector 6, secondary gaseous phase materials by water ejector 6, water-circulating pump 7 In thionyl chloride mixed in water ejector with water generation hydrogen chloride and sulfur dioxide into water circulation tank 8, most of chlorination Hydrogen is only absorbed by the water, and concentration of hydrochloric acid is controlled below 10%, and remaining gaseous phase materials enter in alkali lye injector 9；
3) sodium hydroxide solution in lye tank 10 is drawn through pipeline and gives alkali lye injector by NaOH solution circulating pump 11 9, remaining gaseous phase materials enter alkali lye injector 9, are mixed with sodium hydroxide solution to lye tank 10, sulfur dioxide is by sodium hydroxide Solution absorbs.
Embodiment 2
A kind of acyl chlorides rectification under vacuum waste water reclaiming device of the present embodiment, refer to the attached drawing 1, including the rectifying dress being sequentially connected Put, vacuum buffer tank 4 and vacuum pump set；The vacuum pump set includes lobe pump 5, water jet device and the alkali lye spray of two series connection Injection device, the air inlet of lobe pump 5 are connected with vacuum buffer tank 4, and the gas outlet of lobe pump 5 is sprayed with water jet device and alkali lye successively Device connects；The water jet device includes water ejector 6, water-circulating pump 7 and water circulation tank 8；The bottom of water circulation tank 8 connects water Circulating pump 7, water-circulating pump 7 connect water ejector 6, and water ejector 6 connects the top of water circulation tank 8；The alkali lye injection apparatus bag Include alkali lye injector 9, lye tank 10 and NaOH solution circulating pump 11；Alkali lye injector 9 is connected with the top of lye tank 10, and lye tank 10 goes out Liquid mouth connects NaOH solution circulating pump 11, and NaOH solution circulating pump 11 is connected with alkali lye injector 9；Sprayed with water the gas outlet of lobe pump 5 Device 6 is connected, and the top of water circulation tank 8 connects with alkali lye injector 9；Acyl chlorides rectifier unit includes acyl chlorides rectifying column 1, the and of condenser 2 Gas-liquid separator 3, the top of acyl chlorides rectifying column 1 are connected with the top of condenser 2, and the bottom of condenser 2 connects with the top of gas-liquid separator 3 Logical, the bottom of condenser 2 connects with the top of gas-liquid separator 3, and gas-liquid separator 3 is connected with the top of vacuum buffer tank 4.
A kind of acyl chlorides rectification under vacuum method for reclaiming waste water, comprises the following steps：
1) the condensed device 2 of material from acyl chlorides rectifying column 1 out enters after condensing carries out gas-liquid point in gas-liquid separator 3 From liquid phase material is entered in acyl chlorides rectifying column 1, and gaseous phase materials enter the cooling of vacuum buffer tank 4 that temperature is 10 DEG C and remove acyl Chlorine, obtain secondary gaseous phase materials；
2) secondary gaseous phase materials enter the air inlet of lobe pump 5, enter from the secondary gaseous phase materials of the gas outlet of lobe pump 5 discharge Water in water circulation tank 8 is drawn through pipeline feed water ejector 6, secondary gaseous phase materials by water ejector 6, water-circulating pump 7 In thionyl chloride mixed in water ejector with water generation hydrogen chloride and sulfur dioxide into water circulation tank 8, most of chlorination Hydrogen is only absorbed by the water, and concentration of hydrochloric acid is controlled below 10%, and remaining gaseous phase materials enter in alkali lye injector 9；
3) sodium hydroxide solution in lye tank 10 is drawn through pipeline and gives alkali lye injector by NaOH solution circulating pump 11 9, remaining gaseous phase materials enter alkali lye injector 9, are mixed with sodium hydroxide solution to lye tank 10, sulfur dioxide is by sodium hydroxide Solution absorbs.

Claims (9)

  1. A kind of 1. acyl chlorides rectification under vacuum waste water reclaiming device, it is characterised in that：
    Including the rectifier unit, vacuum buffer tank (4) and vacuum pump set being sequentially connected；
    The vacuum pump set includes lobe pump (5), water jet device and alkali lye injection apparatus, lobe pump (5) air inlet and vacuum Surge tank (4) connects, and lobe pump (5) gas outlet connects with water jet device and alkali lye injection apparatus successively；
    The water jet device includes water ejector (6), water-circulating pump (7) and water circulation tank (8)；Water circulation tank (8) bottom connects Water flowing circulating pump (7), water-circulating pump (7) connection water ejector (6)；At the top of water ejector (6) connection water circulation tank (8)；
    The alkali lye injection apparatus includes alkali lye injector (9), lye tank (10) and NaOH solution circulating pump (11)；Lye tank (10) goes out Liquid mouth connection NaOH solution circulating pump (11), NaOH solution circulating pump (11) are connected with alkali lye injector (9), alkali lye injector (9) and alkali lye It is connected at the top of case (10)；
    Lobe pump (5) gas outlet is connected with water ejector (6), is connected at the top of water circulation tank (8) with alkali lye injector (9).
  2. 2. acyl chlorides rectification under vacuum waste water reclaiming device according to claim 1, it is characterised in that：Acyl chlorides rectifier unit includes Acyl chlorides rectifying column (1), condenser (2) and gas-liquid separator (3), acyl chlorides rectifying column (1) top are connected with condenser (2) top, Condenser (2) bottom at the top of gas-liquid separator (3) with connecting, and condenser (2) bottom at the top of gas-liquid separator (3) with connecting, gas Liquid/gas separator (3) at the top of vacuum buffer tank (4) with being connected.
  3. 3. acyl chlorides rectification under vacuum waste water reclaiming device according to claim 1, it is characterised in that：Lobe pump (5) is 2 strings It is linked togather.
  4. 4. acyl chlorides rectification under vacuum waste water reclaiming device according to claim 1, it is characterised in that：Vacuum buffer tank (4) band There is cooling chuck.
  5. A kind of 5. acyl chlorides rectification under vacuum method for reclaiming waste water, it is characterised in that：Comprise the following steps：
    1) enter after the condensed device of material (2) condensation from acyl chlorides rectifying column (1) out and gas-liquid is carried out in gas-liquid separator (3) Separation, liquid phase material are entered in acyl chlorides rectifying column (1), and gaseous phase materials enter vacuum buffer tank (4) cooling and remove acyl chlorides, obtain two Secondary gaseous phase materials；
    2) secondary gaseous phase materials enter lobe pump (5) air inlet, enter from the secondary gaseous phase materials of lobe pump (5) gas outlet discharge Water ejector (6), the water in water circulation tank (8) is drawn through pipeline feed water ejector (6) by water-circulating pump (7), secondary Thionyl chloride in gaseous phase materials mixes generation hydrogen chloride and sulfur dioxide into water circulation tank (8) in water ejector with water, Most of hydrogen chloride gas is only absorbed by the water, and remaining gaseous phase materials enter in alkali lye injector (9)；
    3) alkali lye in lye tank (10) is drawn through pipeline and gives alkali lye injector (9) by NaOH solution circulating pump (11), remaining Gaseous phase materials are mixed with alkali lye to lye tank (10), and sulfur dioxide is by alkali liquor absorption.
  6. 6. acyl chlorides rectification under vacuum method for reclaiming waste water according to claim 5, it is characterised in that：Followed in water circulation tank (8) Ring liquid is a water.
  7. 7. acyl chlorides rectification under vacuum method for reclaiming waste water according to claim 5, it is characterised in that：Vacuum buffer tank (4) Temperature control is at 0 DEG C -10 DEG C.
  8. 8. acyl chlorides rectification under vacuum method for reclaiming waste water according to claim 5, it is characterised in that：Alkali lye is that sodium hydroxide is molten Liquid.
  9. 9. acyl chlorides rectification under vacuum method for reclaiming waste water according to claim 5, it is characterised in that：Water circulation in step (2) Concentration of hydrochloric acid control is below 10% in tank (8).
CN201711242202.7A 2017-11-30 2017-11-30 Acyl chloride vacuum rectification wastewater recovery device and method Active CN107789855B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101935276A (en) * 2010-08-20 2011-01-05 南化集团研究院 Synthetic method of p-phthaloyl chloride
CN106185840A (en) * 2016-07-04 2016-12-07 汇智工程科技有限公司 Thionyl chloride subtractive process improves the extraction method and device of product quality

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101935276A (en) * 2010-08-20 2011-01-05 南化集团研究院 Synthetic method of p-phthaloyl chloride
CN106185840A (en) * 2016-07-04 2016-12-07 汇智工程科技有限公司 Thionyl chloride subtractive process improves the extraction method and device of product quality

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