WO2021009537A1 - Modern process for spent caustic treating and converting wastewater into valuable by products with process simulation by aspen plus - Google Patents
Modern process for spent caustic treating and converting wastewater into valuable by products with process simulation by aspen plus Download PDFInfo
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- WO2021009537A1 WO2021009537A1 PCT/IB2019/055994 IB2019055994W WO2021009537A1 WO 2021009537 A1 WO2021009537 A1 WO 2021009537A1 IB 2019055994 W IB2019055994 W IB 2019055994W WO 2021009537 A1 WO2021009537 A1 WO 2021009537A1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
Definitions
- This invention is about a method for refinement of caustic wastewater (spent caustic) oil and petrochemical unit;
- the chemical converts it into valuable products such as NaOH and Na2CO3.
- caustic sewage without phenol and sulfur and industrial oils that is completely transparent and odorless and its pollutant characteristics are appropriately below the limit of determination.
- the purification process is generally based on AWAO and Recovery Treatment which consists of three general steps, the first pre-refinement step with advanced wet-air oxidation which is without catalyst.
- the second stage of refinement and recycling of the new product is selectively due to the type of wastewater and the final stage is condensation and neutralization of outlet sewage and the possibility of replacement and selection of the type of acid according to the type of wastewater.
- AOP advanced chemical oxidation
- This design can be used to purification of outlet wastewaters Industrial units where there are hydrocarbon contaminants are used and preventing damage to the environment by these highly hazardous materials.
- this absorbent can be used to remove oil pollution, to leak into the surface of the sea and surface water as a discontinuous method.
- the adsorbent made in the process of purifying all water contaminated with hydrocarbon compounds can be used while in both continuous and discontinuous adsorbent forms, it is possible to regenerate and recover the adsorbed hydrocarbon compounds.
- the above design is a nanoscale absorbent for pollutants released in the environment, where all infiltrated water can be cleaned up by this nano-absorber
- the above design is a nanoscale absorbent for pollutants released in the environment, where all polluted water can be cleaned up by this nano-absorber
- the design provided by me is a caustic wastewater refinement. Which uses WAO and Recovery Treatment, which, in addition to reducing pollution and removing contaminants and toxic substances, has the ability to recover two valuable products.
- caustic wastewater contains about 15 to 20 percent diluted caustic, of the total wastewater in an oil unit, this sewage caused by the washing of acid sour gas CO2 and H2S outlet of towers in the units of Ulfin Petrochemical or towers of gas sweetening units in the Merox (LPG) process with alkaline materials such as sodium hydroxide solution (NaOH), in the event of direct access to the circumference, there are irreparable damage to the environment, due to the high temperatures and high PH.
- LPG Merox
- Cycuper® scheme for the refinement of caustic wastewater is AWAO and Recovery Treatment, and includes the following steps: pre-refinement step with advanced wet air oxidation, new product refinement and recycling stage and the condensation and neutralization stage of the wastewater outlet. After refinement via Cycuper® method, base valuable materials such as NaOH and Na2CO3 remain, and caustic sewage is free of phenol, sulfur and industrial oils.
- petrochemical units for the discharging of its own caustic waste water only use a neutralization method and possibly a few days storage to reduce the temperature and isolation, only a portion of the fats and polymeric materials are used in the reservoir, While in technology of Cycuper's low-cost solvent, such as low-octane gasoline is used to dissolve and isolate part of the sulfur, carbon and unbranched fats in the tank, and in a two-phase manner, separated by wastewater from the wastewater before the main purification process, and the solvent is reused, and in a two-phase manner, separated by wastewater from the wastewater before the main purification process by separatory funnel, and the solvent is reused.
- solvent such as low-octane gasoline
- Kavian petrochemicals in Asalouyeh region currently have used about 600 liters of sulfuric acid 98% diluted till 7%, to neutralize 2 tons of castile It is used to wash its ethylene production towers to reduce the PH of the its Alkaline wastewater outlet material from 8 to 8.5.
- the Outlet caustic wastewater of this petrochemical unit with a volume of 4.5 tons per hour although due to neutralization, is in the appropriate pH range but unfortunately, in terms of pollutant indicators such as COD and TDS, and in terms of temperature (above 56 degrees), it is still not possible to discharge into the environment.
- pollutant indicators such as COD and TDS
- temperature above 56 degrees
- Spant caustic have a lot of dangers for human as a result of dangerous base property in such a way that in case of direct contact causes skin burn, Complete loss of texture of skin and meat and in case of splashing into the eyes, it can cause severe damages till death. For this reason, it should be kept in a confined space with ventilation and for using them it must be used proper personal protective equipment.
- the caustic wastewater output of oil and petrochemical units is not Decomposable and Biological refinement due to the COD / BOD ratio> 0.5. Then certainly it must be reduced in one step its COD rate via the Cycuper process or other refinement processes.
- the method used in the Cycuper® scheme for the caustic wastewater refinement is AWAO and Recovery Treatment, which generally include several steps:
- the implementation of the above plan can be done by solving environmental problems and removing sulfide materials, highly toxic and optimization the petrochemical sewage neutralization system, causing the proper role of a clean industrial unit in the region and earning the title of an special industrial unit or appreciating the environmental organization as a model for the petroleum complex.
- Cycuper ® s treatment process flow diagram.
- Fig3. Is about Spent caustic sample; moreover it illustrates its two conditions: the first condition is a) before, and the second one is b) after treatment.
- the resulting NaOH solution can restore up to 70% of the daily requirement of the refineries for washing and the resulting Na2CO3, according to the laboratory analysis of the Ayar Juyan Novin company (Approved by the Ministry of Industry and Mines) due to the purity and Sufficient quality it is capable of commercial offer on the market.
- the Cycuper® purification unit can be managed through the supply of extracted products as an autonomous unit.
- this technology is used for refinement the caustic sewages of a conventional petrochemical unit, like the Kavian Petrochemical Complex in Assaluyeh, with a volume of 4.7 cubic meters per hour,
- NaOH sodium hydroxide solution
- Liquid or solid powder of caustic (Na2Co3) is widely used in various industries:
- Sodium sulfate production and distilled water are also used for the following applications:
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Abstract
This invention is about a method for refinement of caustic wastewater (spent caustic) oil and petrochemical unit; In addition to refinement of caustic wastewater, the chemical converts it into valuable products such as NaOH and Na2CO3. caustic sewage without phenol and sulfur and industrial oils that is completely transparent and odorless and its pollutant characteristics are appropriately below the limit of determination. The purification process is generally based on AWAO and Recovery Treatment which consists of three general steps, the first pre-refinement step with advanced wet-air oxidation which is without catalyst. The second stage of refinement and recycling of the new product is selectively due to the type of wastewater and the final stage is condensation and neutralization of outlet sewage and the possibility of replacement and selection of the type of acid according to the type of wastewater.
Description
This invention is about a method for refinement of caustic wastewater (spent caustic) oil and petrochemical unit; In addition to refinement of caustic wastewater, the chemical converts it into valuable products such as NaOH and Na2CO3. caustic sewage without phenol and sulfur and industrial oils that is completely transparent and odorless and its pollutant characteristics are appropriately below the limit of determination.
The purification process is generally based on AWAO and Recovery Treatment which consists of three general steps, the first pre-refinement step with advanced wet-air oxidation which is without catalyst. The second stage of refinement and recycling of the new product is selectively due to the type of wastewater and the final stage is condensation and neutralization of outlet sewage and the possibility of replacement and selection of the type of acid according to the type of wastewater.
C02f- B01D
At present, only a few international limited companies shows solutions for the treatment of caustic Wastewater around the world, among which are the solution of Siemens and Envirochemie German companies limited to reducing COD and Removal of smell and detoxification is via the expensive method of catalytic oxidation. Merichem Company also has a specific strategy to reduce the pollution rates of caustic wastewater with the extraction of only one monopoly product, With the difference that the process of this company is much more limited and completely different from the Cycuper process and the industrial drawings of this invention are completely unique the invention also has a process selectivity based on the type of wastewater outlet and production of various valuable materials (multiple products) from wastewater.
But foreign samples usually only deal with environmental degradation. Also, the differences with external samples include the production of a new product and process design, this process is more advanced, and by reducing energy consumption, economical it is also accompanied by computer simulation by the Aspen plus software unique in a very complex electrolytic circumference. Similarly, similar foreign samples, mainly do the environmental refinement work, but the above design with the new technical knowledge is able to produce a high purity sodium carbonate product without the use of expensive chemicals and low operating costs, which is unique in this regard.
Deiraedin and his colleagues in Malaysia in 2011 investigated various refinery wastewater treatment technologies. The use of advanced chemical oxidation (AOP) methods involves the use of materials which are able to produce hydroxyl in radical water. This radical has been reacted non-selective with organic materials and mineral and today it is a new method for purifying refinery wastewaters. AOP methods are able to carry out the refining process until complete mineralization if catalyst is to be used in conjunction with these methods, catalyst should be chosen which is non-toxic, inexpensive and available. However, in my plan, in addition to the purification of oil waste, it leads to the production of valuable products such as 30% liquid profit and solid sodium carbonate with a purity of up to 96%.
Also the difference between oxidation operation with advanced wet air (AWAO) in this process, the use of compressed air in reservoirs and provided with a tank reactors and oxygen injected (H2O2) or sulfuric acid diluted 5% at an appropriate temperature of 200 to 220 ° C in addition to rapid oxidation, the PH value is reduced to a suitable level.
A project titled "Construction of silica-based porous nano-absorber for the removal of hydrocarbon and oil pollution from industrial wastewaters and surface waters" Registration number: 90690
This design can be used to purification of outlet wastewaters Industrial units where there are hydrocarbon contaminants are used and preventing damage to the environment by these highly hazardous materials. In addition, this absorbent can be used to remove oil pollution, to leak into the surface of the sea and surface water as a discontinuous method. In general, the adsorbent made in the process of purifying all water contaminated with hydrocarbon compounds can be used while in both continuous and discontinuous adsorbent forms, it is possible to regenerate and recover the adsorbed hydrocarbon compounds. The above design is a nanoscale absorbent for pollutants released in the environment, where all infiltrated water can be cleaned up by this nano-absorber, The above design is a nanoscale absorbent for pollutants released in the environment, where all polluted water can be cleaned up by this nano-absorber, while the design provided by me is a caustic wastewater refinement. Which uses WAO and Recovery Treatment, which, in addition to reducing pollution and removing contaminants and toxic substances, has the ability to recover two valuable products.
Plans with the following titles: "Use of ilmenite and Nano Ilmenite as a light catalyzer with a vegetable oil waste to remove oil pollution " "making super-hydrophilic networked polyvinylalve membrane using ultraviolet light for using in the refinement of oil wastewaters and oil wastewaters refinement system with advanced oxidation and continuous adsorption "have been recorded In all of the aforementioned designs, they have used different methods for wastewater refinement. But the above plan such as the refinement of oil wastewater using polymer membrane and nano are very expensive. and has side-effects such as absorbent recycling or reclaiming and replacing membrane screening and are not as cost effective as the Cycuper process and now the wastewater refinement caustic as well as the use of cheap chemicals (such as lime) to convert caustic wastewater into valuable products and the possibility of residual Health Discharge in the environment has not been investigated and registered in internal level. There are also studies in the international community that are as follows.
Production and industrial processes of oil and petrochemical units create numerous wastewater, such as oily process water and non-oily process water. caustic wastewater contains about 15 to 20 percent diluted caustic, of the total wastewater in an oil unit, this sewage caused by the washing of acid sour gas CO2 and H2S outlet of towers in the units of Ulfin Petrochemical or towers of gas sweetening units in the Merox (LPG) process with alkaline materials such as sodium hydroxide solution (NaOH), in the event of direct access to the circumference, there are irreparable damage to the environment, due to the high temperatures and high PH.
Storing these materials in storage tanks for at least 3 days to reduce the temperature and adding acid to reduce the output pH is a solution that is used today in most refineries in the country. The method used in the Cycuper® scheme for the refinement of caustic wastewater is AWAO and Recovery Treatment, and includes the following steps: pre-refinement step with advanced wet air oxidation, new product refinement and recycling stage and the condensation and neutralization stage of the wastewater outlet. After refinement via Cycuper® method, base valuable materials such as NaOH and Na2CO3 remain, and caustic sewage is free of phenol, sulfur and industrial oils.
Creating Production and industrial processes of oil and petrochemical units. Various wastewater, including Oily process water and non-oily process water. caustic wastewater about 15 to 20 percent diluted caustic, from the whole wastewater in an oil unit. This sewage is due to the acid sour gas of CO2 and H2S Outlet of towers in Petrochemical Olefin units or gases sweetening towers in the Merox (LPG) process with alkaline materials such as sodium hydroxide solution (NaOH), due to the temperatures and high PH, in case of direct entry to the environment import irreparable injuries to the environment. Store these materials in storage tanks for at least 3 days to reduce the temperature and add acid to reduce the output PH, it is a solution that is used today in most refineries of the country.
Therefore, when the ethylene gas is broken down in the olefin unit, amounts of sour gas H2S and CO2 are produced and its wastewater that contaminated sewage to harmful sulfur compounds such as Na2S, H2S base compounds such as Na2CO3 and or NaOH waste along with some organic material, polymer or oligomeric, which is released as waste water from the system.The environmental pollution indicator of this material is very high but unfortunately, the true and correct information about their analysis in the oil industry of the country is not publicly available. In any case, it is estimated that about 15 to 20 percent upstream oil field outlet effluent is caustic wastewater which despite combining it with acidic substances to neutralize it, has no direct access to the environment, but it can be done by implementing Cycuper®; it is completely sanitized and valuable products, it can be produced selective according to the type of wastewater petrochemical units or oil unit.
In fact, the production process and product recycling from wastewater of unit in addition to, improvement of the environmental standard of wastewater, hydroxide (caustic soda), is produced one of the consumable items and costly, oil units. Solve health and environmental problems for dwelling people in the region or even people in other areas because of the use of aquatic animals or other products produced at that location, as well as the economic value of high-yielding chemical products, result of the main advantage and innovation of wastewater treatment scheme through Cycuper®, then other methods and solutions even expensive technologies such as catalytic oxidation by international companies are more affordable.
At present situation, petrochemical units for the discharging of its own caustic waste water only use a neutralization method and possibly a few days storage to reduce the temperature and isolation, only a portion of the fats and polymeric materials are used in the reservoir, While in technology of Cycuper's low-cost solvent, such as low-octane gasoline is used to dissolve and isolate part of the sulfur, carbon and unbranched fats in the tank, and in a two-phase manner, separated by wastewater from the wastewater before the main purification process, and the solvent is reused, and in a two-phase manner, separated by wastewater from the wastewater before the main purification process by separatory funnel, and the solvent is reused.
For example, Kavian petrochemicals in Asalouyeh region currently have used about 600 liters of sulfuric acid 98% diluted till 7%, to neutralize 2 tons of castile It is used to wash its ethylene production towers to reduce the PH of the its Alkaline wastewater outlet material from 8 to 8.5. The Outlet caustic wastewater of this petrochemical unit with a volume of 4.5 tons per hour although due to neutralization, is in the appropriate pH range but unfortunately, in terms of pollutant indicators such as COD and TDS, and in terms of temperature (above 56 degrees), it is still not possible to discharge into the environment. On the other hand, taking into account the cost per liter of sulfuric acid consumed (almost every liter of 250 Toman), only 4 billion tomans worth of acid is needed annually for the operation of the caustic wastewater neutralization.
Spant caustic have a lot of dangers for human as a result of dangerous base property in such a way that in case of direct contact causes skin burn, Complete loss of texture of skin and meat and in case of splashing into the eyes, it can cause severe damages till death. For this reason, it should be kept in a confined space with ventilation and for using them it must be used proper personal protective equipment. Full mastery of technical knowledge and flexibility to the working conditions of the country with the possibility of receiving the Rials of the cost of services, as well as the wider range of manufactured products and an appropriate reduction in the BOD Biological Pollution index along with COD index, one of the undeniable benefits of Cycuper® is the caustic refinement.
The caustic wastewater output of oil and petrochemical units is not Decomposable and Biological refinement due to the COD / BOD ratio> 0.5. Then certainly it must be reduced in one step its COD rate via the Cycuper process or other refinement processes. The method used in the Cycuper® scheme for the caustic wastewater refinement is AWAO and Recovery Treatment, which generally include several steps:
- Advanced pre-refinement step with advanced wet air oxidation (without catalyst and use of cheap lateral chemicals material and suitable operating temperature).
- Refinement step and new product recycling, selectively according to the type of wastewater.
- Density stage and neutralization of wastewater balcony with optimal and less acidic consumption and and the possibility of replacing the type of acid according to the type of wastewater (for example, using of Hydrochloric acid or HCL in sulfide caustic refinement).
Different types of spant caustic Wastewater and the characteristics of each of them are given in the table below. Depending on the type of wastewater and classification, wastewater can be refined via different methods according to process and technology of Cycuper®. Totally caustic sewage is classified according to the materials and output pollutants into three categories: sulfide, naphtha and cresylic:
After refinement by Cycuper® refinery method of caustic sewage after removing toxic and oil sludge and the extraction of valuable materials such as: NaOH and Na2CO3 what remains is caustic sewage without phenol and sulfur and industrial oils, it is completely transparent and without bad smell and its pollutant characteristics are appropriately below the standards set by the standards and are approved. However, due to the high amount of carbonate ions is recyclable, has the ability to extract high-carbon content and can be combined with the appropriate amount of acid, depending on the conditions of neutralizing the remaining caustic solution completely.
By implementing the above plan, in addition to being able to provide a significant portion of the castile consumed in washing the towers of the oil industry (about 70%), it is possible to produce other valuable products such as sodium carbonate and it is available in domestic markets. The implementation of the mentioned plan also leads to a sharp decrease in the consumption of acid needed to neutralize the primary wastewater (to about one fifth). On the other hand, the implementation of the above plan can be done by solving environmental problems and removing sulfide materials, highly toxic and optimization the petrochemical sewage neutralization system, causing the proper role of a clean industrial unit in the region and earning the title of an special industrial unit or appreciating the environmental organization as a model for the petroleum complex.
Refinement of oil polluted wastewater and reducing environmental damage (rivers, seas) at a lower cost and more optimal process.
Reduce COD, BOD, TOC, and TDS contamination indices and bring the standard to environment release.
Reduce the PH of the alkaline and corrosive sewage to the neutral range (8-7).
Reduce acid consumption to neutralize wastewater.
Producing grease products, distilled water directly.
Production of sub-products such as NaOH and Na2CO3 and Na2SO4 according to the type of caustic wastewater.
Removal of toxic and deadly environmental materials such as Na2S, H2S, NaHS.
Remove the very bad smell of sulfur and mercaptan compounds.
Storing and recycling High amounts of solvent and distilled water.
Use of solvent and cheap chemical materials such as gasoline and lime.
Reduce operational costs and use cheap energy of its own oil units (the steam of its unit).
Selectivity of the product type and purification process according to the type of wastewater.
Cycuper®’s treatment process flow diagram.
Schematic preview of the Cycuper® Technology
In the following detailed description and specific embodiment detect and show via illustration then detailed and sufficient description of embodiment is propounded in this section, in order to better comprehension of the invented plan and its parts.
Fig1. Is clarification of Cycuper®’s treatment process flow diagram.
Fig2. Is overview of Schematic preview of the Cycuper® Technology
Fig3. Is about Spent caustic sample; moreover it illustrates its two conditions: the first condition is a) before, and the second one is b) after treatment.
Fig4. According to an analysis of the output of the Cycuper® refinement process, the resulting NaOH solution can restore up to 70% of the daily requirement of the refineries for washing and the resulting Na2CO3, according to the laboratory analysis of the Ayar Juyan Novin company (Approved by the Ministry of Industry and Mines) due to the purity and Sufficient quality it is capable of commercial offer on the market.
Examples
Depending on the sewage composition of each unit and the relevant environmental conditions, the technology used will be changed completely specific. For example, in dry areas such as Arak and Tabriz, the process of refining focused on the Advanced Oxidation Division (AWAO) and for sultry and marine environments such as southern regions of Iran will focus on neutralization and (Recovery Treatment). Ultimately, although the proposed plan is for the caustic sewages, However, Cycuper® is ready to provide complete refinery solutions for other oil sewages, sulfide or crystalline, and phenolic, clearly, each solution will be designed, implemented and supported in a totally dedicated manner, depending on the type of facility.
For example, the Cycuper® purification unit can be managed through the supply of extracted products as an autonomous unit. For example, if this technology is used for refinement the caustic sewages of a conventional petrochemical unit, like the Kavian Petrochemical Complex in Assaluyeh, with a volume of 4.7 cubic meters per hour, In addition to reducing the annual cost of 4 billion Tomans due to the removal of 600 liters of sulfuric acid 98% used for the day, more than 26 billion Tomans will be extracted from the sodium hydroxide solution (NaOH) needed by oil units for tower washing.
| Characteristics table for variety of sewage caustic |
|||
| Characteristic |
Sulfidic |
Naphthenic |
cresylic |
| COD |
5000-90000 |
5000-100000 |
240000-150000 |
| TOC | 20-3000 | 10000-24000 | 24000-60000 |
| Sulfide |
2000-52000 | Less than one |
0-63000 |
| Sulfite |
1/5-5000 | 8-4 | 800-1500 |
| Mercaptan |
0-30000 | Less than 30 |
0-5400 |
| Thiosulfate |
0-4000 | 1200-70 | 10000-13000 |
| Phenol | 2-30 | 10000-1900 | 14000-19000 |
Nowadays Liquid or solid powder of caustic (Na2Co3) is widely used in various industries:
The production of detergent powder (to enhance the power of detergency and the replacement of fat in the production of soap and the production of Javelle water.
Petroleum refining industry (auxiliary additive).
pulp production industry (coloring and neutralizing acid solution).
Aluminum industry (as a neutralizing material in the aluminum production line).
Weaving industries (Artificial silk production, paint, bleach, Deplete Fat)
Other chemical industries (production of monomers of vinyl and chloride Vanillin, phosphates, silicates)
Sodium sulfate production and distilled water are also used for the following applications:
Car battery water production.
Distilled water of laboratory and Pharmaceutical Health.
Animal feed
Pharmaceutical Industries
Glass industry
washer and detergent powder industry
Knitting industry and dyeing industry
Military Industries, Photography, Sodium Sulfur
paper industry (Kraft paper) etc ....
Claims (8)
- What is claimed to be a method for refinement caustic wastewater Petrochemical units and turning its chemicals into valuable products which includes AWAO and Recovery Treatment.
- According to claim 1, the mentioned methods have 3 stages which are the pre-refinement stage, the stage of purification and recycling of the new product and stage of condensation and neutralization of outlet sewage.
- According to claim 2, the pre-refinement stage are carried out via advanced wet air oxidation at the proper operating temperature.
- According to claim 3, the pre-refinement stage takes place without the use of a catalyst.
- According to claim 2, the refinement and recycling of new products are selectively and according to the type of wastewater.
- According to claim 2, the acid of condensation stage and neutralization of outlet sewage can be selected according to the type of outlet wastewater.
- According to claim 1, it can be purified wastewater via different methods according to the process and technology of Cycuper®, based on type of wastewater and classification.
- According to claim 1, there are valuable raw materials such as: NaOH and Na2CO3 after refinement with Cycuper® way. Then whatever stay is caustic wastewater without phenol, sulfur and industrial oils.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057576A (en) * | 2021-08-16 | 2022-09-16 | 济南惠成达科技有限公司 | Operation method for advanced treatment and reuse of petrochemical industry sewage and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8734648B2 (en) * | 2007-09-11 | 2014-05-27 | Siemens Energy, Inc. | Treatment of spent caustic waste |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8734648B2 (en) * | 2007-09-11 | 2014-05-27 | Siemens Energy, Inc. | Treatment of spent caustic waste |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115057576A (en) * | 2021-08-16 | 2022-09-16 | 济南惠成达科技有限公司 | Operation method for advanced treatment and reuse of petrochemical industry sewage and application thereof |
| CN115057576B (en) * | 2021-08-16 | 2024-03-26 | 济南惠成达科技有限公司 | Operation method for advanced treatment and reuse of sewage in petrochemical industry and application thereof |
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