CN105327606A - Processing method for octadecanoyl chloride tail gas - Google Patents
Processing method for octadecanoyl chloride tail gas Download PDFInfo
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- CN105327606A CN105327606A CN201510692508.7A CN201510692508A CN105327606A CN 105327606 A CN105327606 A CN 105327606A CN 201510692508 A CN201510692508 A CN 201510692508A CN 105327606 A CN105327606 A CN 105327606A
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen 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
- B01D53/005—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 heat treatment
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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
- B01D53/26—Drying gases or vapours
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/62—Carbon oxides
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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
- B01D53/34—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
- B01D53/78—Liquid phase processes with gas-liquid contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/20—Carbon monoxide
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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
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
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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
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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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
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
A provided processing method for octadecanoyl chloride tail gas comprises the following steps: 1) introducing octadecanoyl-chloride-producing tail gas into a first-stage NaOH solution kettle; 2) introducing the gas generated in the above first-stage NaOH solution kettle into a second-stage NaOH solution kettle; 3) introducing the gas generated in the step 2) into a third-stage NaOH solution kettle; 4) introducing the gas discharged in the step 3) into a drying tank; and 5) introducing the gas generated in the step 4) into a combustion furnace and igniting the gas, and directly discharging generated gas. The above production technology is employed, also temperature control is important, increment of byproducts is avoided, the tail-gas discharge capacity is within a reasonable scope, and the discharge capacities of phosgene and carbon monoxide are reduced to 0.05-0.5%, and therefore, the concentration accords with national safety discharge standard.
Description
Technical field
The present invention relates to plastics fine chemistry industry production field, be specifically related to a kind of exhaust gas treating method of stearic acid chloride.
Background technology
Stearyl chloride (Stearoylacidchloride, have another name called 18 acyl chlorides) be a kind of pesticide intermediate, also be the raw materials for production of the rare ketone dimer (AKD) of papermaking neutral sizing agent--alkyl, be stearic acid under the catalysis of catalyst dimethyl formamide (DMF), to generate with phosgene reaction.
In catalysis photochemical reaction process, DMF, stearic acid, stearyl chloride generation side reaction, generate complicated tar class coloring matter, stearyl chloride is heat-sensitive substance, can produce tar by polymerization reaction take place after exceeding uniform temperature, and tar generation raises with temperature and the prolongation of heat time increases sharply.Therefore, only Quick-gasifying under lower temperature conditions, distillation decoloration could be realized smoothly, under conventional rectification condition, tar generating rate is too high, general employing active carbon decolours, but above-mentioned raw materials reaction also can produce tail gas, and the tail gas produced is more various, such as phosgene can be excessive, just can make stearic acid can complete reaction, but phosgene can produce hydrogen chloride gas and carbon dioxide with water simultaneous reactions when reacting, and the tail gas of some other side reaction generation, be directly discharged in air can affect environment because tail gas can not process.
Summary of the invention
For above problems of the prior art, the invention provides a kind of exhaust gas treating method of stearic acid chloride, fully can break ring tail gas, make to avoid contaminated environment during exhaust emissions.
The present invention is achieved by the following technical solutions:
An exhaust gas treating method for stearic acid chloride, its step is as follows:
1) be passed in one-level NaOH solution still by the tail gas producing hard acyl chlorides, and ceaselessly stir, wherein the concentration of NaOH solution is 3-9%, and the time passing into NaOH solution is 10-20 minute;
2) be passed in secondary NaOH solution still by the gas produced in the one-level NaOH solution still in step 1, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 10-14%, and the time is 30-60 minute;
3) be passed in three grades of NaOH solution stills by the gas produced in step 2, and wherein the concentration of NaOH solution is 10-12%, the time is 30-45 minute;
4) gas of releasing in step 3 is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 20-60 DEG C;
5) gas produced in step 4 is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging.
Further, a kind of exhaust gas treating method of stearic acid chloride, its step is as follows:
1) be passed in one-level NaOH solution still by the tail gas producing hard acyl chlorides, and ceaselessly stir, wherein the concentration of NaOH solution is 7%, and the time passing into NaOH solution is 15 minutes;
2) be passed in secondary NaOH solution still by the gas produced in the one-level NaOH solution still in step 1, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 13%, and the time is 55 minutes;
3) be passed in three grades of NaOH solution stills by the gas produced in step 2, and wherein the concentration of NaOH solution is 11%, the time is 35 minutes;
4) gas of releasing in step 3 is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 54 DEG C;
5) gas produced in step 4 is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging.
Beneficial effect of the present invention is: the present invention adopts above-mentioned production technology, the contact area of reactant can be increased, reduce the reaction time, simultaneous temperature controls very important, increasing of accessory substance can be avoided, therefore just improve reaction efficiency, cost reduces, decrease the waste of phosgene, decrease the time of material post-processed such as rectifying and exhaust-gas treatment, wherein, save phosgene 10-15%, the content of thick polyester acyl chlorides is increased to 79-88%, and cost savings 23-30%, the time saves 2-3.5 hour.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment 1
First the tail gas producing hard acyl chlorides is passed in one-level NaOH solution still, and ceaselessly stir, wherein the concentration of NaOH solution is 7%, the time passing into NaOH solution is 15 minutes, while the phosgene contained in tail gas can being hydrolyzed, the hydrogen chloride gas in tail gas can be made also can to react with NaOH solution, produce carbon dioxide etc.; Secondly the gas produced in above-mentioned one-level NaOH solution still is passed in secondary NaOH solution still, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 13%, and the time is 55 minutes, incomplete for above-mentioned reaction phosgene and hydrogen chloride gas can be reacted more fully; The gas of above-mentioned generation is passed in three grades of NaOH solution stills again, and wherein the concentration of NaOH solution is 11%, and the time is 35 minutes, and the energy in further cleaning of off-gas and NaOH solution are reacted and more fully react completely with the phosgene that water can react; Then the gas of above-mentioned releasing is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 54 DEG C, can obtain dry gas, as imflammable gas such as carbon monoxide; Finally the gas of above-mentioned generation is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging, the tail gas of dried a small amount of incomplete reaction can be burnt fully, can by minimum for the content containing not easily emission gases of tail gas.
Therefore above-mentioned production technology is adopted, simultaneous temperature controls very important, increasing of accessory substance can be avoided, exhaust emissions amount in tail gas can be reached in rational scope, wherein the discharge capacity of phosgene and carbon monoxide has been reduced to 0.05-0.5%, and therefore this concentration meets nation's security discharge standard.
Embodiment 2
First the tail gas producing hard acyl chlorides is passed in one-level NaOH solution still, and ceaselessly stir, wherein the concentration of NaOH solution is 3%, the time passing into NaOH solution is 20 minutes, while the phosgene contained in tail gas can being hydrolyzed, the hydrogen chloride gas in tail gas can be made also can to react with NaOH solution, produce carbon dioxide etc.; Secondly the gas produced in above-mentioned one-level NaOH solution still is passed in secondary NaOH solution still, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 10%, and the time is 60 minutes, incomplete for above-mentioned reaction phosgene and hydrogen chloride gas can be reacted more fully; The gas of above-mentioned generation is passed in three grades of NaOH solution stills again, and wherein the concentration of NaOH solution is 10%, and the time is 45 minutes, and the energy in further cleaning of off-gas and NaOH solution are reacted and more fully react completely with the phosgene that water can react; Then the gas of above-mentioned releasing is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 20 DEG C, can obtain dry gas, as imflammable gas such as carbon monoxide; Finally the gas of above-mentioned generation is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging, the tail gas of dried a small amount of incomplete reaction can be burnt fully, can by minimum for the content containing not easily emission gases of tail gas.
Therefore above-mentioned production technology is adopted, simultaneous temperature controls very important, increasing of accessory substance can be avoided, exhaust emissions amount in tail gas can be reached in rational scope, wherein the discharge capacity of phosgene and carbon monoxide has been reduced to 0.05-0.5%, and therefore this concentration meets nation's security discharge standard.
Embodiment 3
First the tail gas producing hard acyl chlorides is passed in one-level NaOH solution still, and ceaselessly stir, wherein the concentration of NaOH solution is 4%, the time passing into NaOH solution is 13 minutes, while the phosgene contained in tail gas can being hydrolyzed, the hydrogen chloride gas in tail gas can be made also can to react with NaOH solution, produce carbon dioxide etc.; Secondly the gas produced in above-mentioned one-level NaOH solution still is passed in secondary NaOH solution still, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 14%, and the time is 40 minutes, incomplete for above-mentioned reaction phosgene and hydrogen chloride gas can be reacted more fully; The gas of above-mentioned generation is passed in three grades of NaOH solution stills again, and wherein the concentration of NaOH solution is 12%, and the time is 30 minutes, and the energy in further cleaning of off-gas and NaOH solution are reacted and more fully react completely with the phosgene that water can react; Then the gas of above-mentioned releasing is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 40 DEG C, can obtain dry gas, as imflammable gas such as carbon monoxide; Finally the gas of above-mentioned generation is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging, the tail gas of dried a small amount of incomplete reaction can be burnt fully, can by minimum for the content containing not easily emission gases of tail gas.
Therefore above-mentioned production technology is adopted, simultaneous temperature controls very important, increasing of accessory substance can be avoided, exhaust emissions amount in tail gas can be reached in rational scope, wherein the discharge capacity of phosgene and carbon monoxide has been reduced to 0.05-0.5%, and therefore this concentration meets nation's security discharge standard.
Embodiment 4
First the tail gas producing hard acyl chlorides is passed in one-level NaOH solution still, and ceaselessly stir, wherein the concentration of NaOH solution is 5%, the time passing into NaOH solution is 17 minutes, while the phosgene contained in tail gas can being hydrolyzed, the hydrogen chloride gas in tail gas can be made also can to react with NaOH solution, produce carbon dioxide etc.; Secondly the gas produced in above-mentioned one-level NaOH solution still is passed in secondary NaOH solution still, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 12%, and the time is 50 minutes, incomplete for above-mentioned reaction phosgene and hydrogen chloride gas can be reacted more fully; The gas of above-mentioned generation is passed in three grades of NaOH solution stills again, and wherein the concentration of NaOH solution is 10%, and the time is 40 minutes, and the energy in further cleaning of off-gas and NaOH solution are reacted and more fully react completely with the phosgene that water can react; Then the gas of above-mentioned releasing is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 30 DEG C, can obtain dry gas, as imflammable gas such as carbon monoxide; Finally the gas of above-mentioned generation is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging, the tail gas of dried a small amount of incomplete reaction can be burnt fully, can by minimum for the content containing not easily emission gases of tail gas.
Therefore above-mentioned production technology is adopted, simultaneous temperature controls very important, increasing of accessory substance can be avoided, exhaust emissions amount in tail gas can be reached in rational scope, wherein the discharge capacity of phosgene and carbon monoxide has been reduced to 0.05-0.5%, and therefore this concentration meets nation's security discharge standard.
Embodiment 5
First the tail gas producing hard acyl chlorides is passed in one-level NaOH solution still, and ceaselessly stir, wherein the concentration of NaOH solution is 9%, the time passing into NaOH solution is 19 minutes, while the phosgene contained in tail gas can being hydrolyzed, the hydrogen chloride gas in tail gas can be made also can to react with NaOH solution, produce carbon dioxide etc.; Secondly the gas produced in above-mentioned one-level NaOH solution still is passed in secondary NaOH solution still, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 11%, and the time is 30 minutes, incomplete for above-mentioned reaction phosgene and hydrogen chloride gas can be reacted more fully; The gas of above-mentioned generation is passed in three grades of NaOH solution stills again, and wherein the concentration of NaOH solution is 10%, and the time is 38 minutes, and the energy in further cleaning of off-gas and NaOH solution are reacted and more fully react completely with the phosgene that water can react; Then the gas of above-mentioned releasing is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 60 DEG C, can obtain dry gas, as imflammable gas such as carbon monoxide; Finally the gas of above-mentioned generation is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging, the tail gas of dried a small amount of incomplete reaction can be burnt fully, can by minimum for the content containing not easily emission gases of tail gas.
Therefore above-mentioned production technology is adopted, simultaneous temperature controls very important, increasing of accessory substance can be avoided, exhaust emissions amount in tail gas can be reached in rational scope, wherein the discharge capacity of phosgene and carbon monoxide has been reduced to 0.05-0.5%, and therefore this concentration meets nation's security discharge standard.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. an exhaust gas treating method for stearic acid chloride, is characterized in that: its step is as follows:
1) be passed in one-level NaOH solution still by the tail gas producing hard acyl chlorides, and ceaselessly stir, wherein the concentration of NaOH solution is 3-9%, and the time passing into NaOH solution is 10-20 minute;
2) be passed in secondary NaOH solution still by the gas produced in the one-level NaOH solution still in step 1, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 10-14%, and the time is 30-60 minute;
3) be passed in three grades of NaOH solution stills by the gas produced in step 2, and wherein the concentration of NaOH solution is 10-12%, the time is 30-45 minute;
4) gas of releasing in step 3 is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 20-60 DEG C;
5) gas produced in step 4 is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging.
2. the exhaust gas treating method of a kind of stearic acid chloride according to claim 1, is characterized in that: its step is as follows:
1) be passed in one-level NaOH solution still by the tail gas producing hard acyl chlorides, and ceaselessly stir, wherein the concentration of NaOH solution is 7%, and the time passing into NaOH solution is 15 minutes;
2) be passed in secondary NaOH solution still by the gas produced in the one-level NaOH solution still in step 1, and ceaselessly stir simultaneously, wherein the concentration of NaOH solution is 13%, and the time is 55 minutes;
3) be passed in three grades of NaOH solution stills by the gas produced in step 2, and wherein the concentration of NaOH solution is 11%, the time is 35 minutes;
4) gas of releasing in step 3 is passed through in drying chamber, and desiccant-filled in drying chamber, and temperature is 54 DEG C;
5) gas produced in step 4 is passed in combustion furnace and lights, and the gas of generation can directly be carried out discharging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510692508.7A CN105327606A (en) | 2015-10-20 | 2015-10-20 | Processing method for octadecanoyl chloride tail gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510692508.7A CN105327606A (en) | 2015-10-20 | 2015-10-20 | Processing method for octadecanoyl chloride tail gas |
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| CN105327606A true CN105327606A (en) | 2016-02-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663477A (en) * | 2018-12-30 | 2019-04-23 | 安徽广信农化股份有限公司 | A kind of method for treatment of waste material preparing ethyl chloroformate |
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|---|---|---|---|---|
| CN203264540U (en) * | 2013-05-17 | 2013-11-06 | 山东天安化工股份有限公司 | Destruction device containing phosgene tail gas |
| CN203829895U (en) * | 2014-04-29 | 2014-09-17 | 安徽省化工设计院 | Phosgene synthesis tail gas absorption and processing device |
| CN203971730U (en) * | 2014-06-27 | 2014-12-03 | 中国海洋石油总公司 | Phosgene treating apparatus in the synthetic and photochemical reaction process of a kind of phosgene |
| CN104492239A (en) * | 2014-11-25 | 2015-04-08 | 中国海洋石油总公司 | CO2, CL2 , phosgene and other toxic gas-containing tail gas treatment process and device |
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- 2015-10-20 CN CN201510692508.7A patent/CN105327606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203264540U (en) * | 2013-05-17 | 2013-11-06 | 山东天安化工股份有限公司 | Destruction device containing phosgene tail gas |
| CN203829895U (en) * | 2014-04-29 | 2014-09-17 | 安徽省化工设计院 | Phosgene synthesis tail gas absorption and processing device |
| CN203971730U (en) * | 2014-06-27 | 2014-12-03 | 中国海洋石油总公司 | Phosgene treating apparatus in the synthetic and photochemical reaction process of a kind of phosgene |
| CN104492239A (en) * | 2014-11-25 | 2015-04-08 | 中国海洋石油总公司 | CO2, CL2 , phosgene and other toxic gas-containing tail gas treatment process and device |
Non-Patent Citations (1)
| Title |
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| 环境保护部环境工程评估中心: "《化工石化及医药类环境影响评价》", 31 October 2012 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109663477A (en) * | 2018-12-30 | 2019-04-23 | 安徽广信农化股份有限公司 | A kind of method for treatment of waste material preparing ethyl chloroformate |
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