CN112875833A - Method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt - Google Patents
Method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt Download PDFInfo
- Publication number
- CN112875833A CN112875833A CN202110337822.9A CN202110337822A CN112875833A CN 112875833 A CN112875833 A CN 112875833A CN 202110337822 A CN202110337822 A CN 202110337822A CN 112875833 A CN112875833 A CN 112875833A
- Authority
- CN
- China
- Prior art keywords
- hydroxylamine
- waste liquid
- sodium nitrite
- salt
- hydroxylamine salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 57
- 239000007788 liquid Substances 0.000 title claims abstract description 56
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 150000002443 hydroxylamines Chemical class 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 26
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 54
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000010790 dilution Methods 0.000 claims abstract description 7
- 239000012895 dilution Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- WTDHULULXKLSOZ-UHFFFAOYSA-N Hydroxylamine hydrochloride Chemical compound Cl.ON WTDHULULXKLSOZ-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- ZNBNBTIDJSKEAM-UHFFFAOYSA-N 4-[7-hydroxy-2-[5-[5-[6-hydroxy-6-(hydroxymethyl)-3,5-dimethyloxan-2-yl]-3-methyloxolan-2-yl]-5-methyloxolan-2-yl]-2,8-dimethyl-1,10-dioxaspiro[4.5]decan-9-yl]-2-methyl-3-propanoyloxypentanoic acid Chemical compound C1C(O)C(C)C(C(C)C(OC(=O)CC)C(C)C(O)=O)OC11OC(C)(C2OC(C)(CC2)C2C(CC(O2)C2C(CC(C)C(O)(CO)O2)C)C)CC1 ZNBNBTIDJSKEAM-UHFFFAOYSA-N 0.000 claims description 2
- NILJXUMQIIUAFY-UHFFFAOYSA-N hydroxylamine;nitric acid Chemical compound ON.O[N+]([O-])=O NILJXUMQIIUAFY-UHFFFAOYSA-N 0.000 claims description 2
- HYYHQASRTSDPOD-UHFFFAOYSA-N hydroxylamine;phosphoric acid Chemical compound ON.OP(O)(O)=O HYYHQASRTSDPOD-UHFFFAOYSA-N 0.000 claims description 2
- 229910000378 hydroxylammonium sulfate Inorganic materials 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims 1
- 239000003153 chemical reaction reagent Substances 0.000 claims 1
- 229910017604 nitric acid Inorganic materials 0.000 claims 1
- 238000006731 degradation reaction Methods 0.000 abstract description 5
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 238000006479 redox reaction Methods 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000002351 wastewater Substances 0.000 description 11
- 239000000243 solution Substances 0.000 description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000012452 mother liquor Substances 0.000 description 5
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 229910001447 ferric ion Inorganic materials 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- -1 hydroxylamine salt Chemical class 0.000 description 3
- 238000010979 pH adjustment Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000006146 oximation reaction Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- ROLMZTIHUMKEAI-UHFFFAOYSA-N 4,5-difluoro-2-hydroxybenzonitrile Chemical compound OC1=CC(F)=C(F)C=C1C#N ROLMZTIHUMKEAI-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003471 mutagenic agent Substances 0.000 description 1
- 231100000707 mutagenic chemical Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 239000001272 nitrous oxide Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- RAPZEAPATHNIPO-UHFFFAOYSA-N risperidone Chemical compound FC1=CC=C2C(C3CCN(CC3)CCC=3C(=O)N4CCCCC4=NC=3C)=NOC2=C1 RAPZEAPATHNIPO-UHFFFAOYSA-N 0.000 description 1
- 229960001534 risperidone Drugs 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- NQRYJNQNLNOLGT-UHFFFAOYSA-N tetrahydropyridine hydrochloride Natural products C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
- C02F1/586—Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
Abstract
The invention discloses a method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt, which is characterized by comprising the following steps: (1) adding a certain amount of water into the waste liquid containing hydroxylamine and/or hydroxylamine salt for dilution; (2) heating and stirring to dissolve insoluble substances in the waste liquid, and adjusting the pH value of the waste liquid to 5-7; (3) preparing a sodium nitrite aqueous solution with a certain concentration, and dropwise adding the sodium nitrite aqueous solution into the waste liquid within a certain time; (4) after the dripping is finished, the mixture is stirred for a certain time under the condition of heat preservation. The invention realizes the degradation of hydroxylamine and hydroxylamine salt by the redox reaction of sodium nitrite and hydroxylamine salt. The method has the advantages of low cost, easy operation, high safety, environmental protection, convenient recycling of subsequent waste liquid and higher economic benefit.
Description
Technical Field
The invention relates to the technical field of sewage recovery and treatment, in particular to a method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt.
Background
Hydroxylamine is mainly used as a reducing agent in chemical synthesis to be condensed with carbonyl compounds to generate oxime, for example, risperidone products produced by the company, and an intermediate (Z) -2,4- (difluorophenyl) -4-piperidyl methyl ketoxime is obtained by oximation reaction of piperidine hydrochloride and hydroxylamine hydrochloride. Since the oximation reaction is carried out using hydroxylamine, an excess amount of hydroxylamine is generally added, which results in varying degrees of hydroxylamine remaining in the production wastewater.
Hydroxylamine is a potential mutagen, has obvious toxic action on human bodies and the environment, has poor stability, is easy to explode when heated, and increases the difficulty of treating hydroxylamine wastewater. In order to ensure the safety of the recovery treatment of the hydroxylamine-containing and/or hydroxylamine salt waste liquid, the hydroxylamine-containing and/or hydroxylamine salt waste liquid needs to be subjected to mild treatment.
The industrial use of aqueous solutions of sodium hypochlorite for the treatment of hydroxylamine/hydroxylamine salt-containing waste waters is common, but this method requires the use of large amounts of sodium hypochlorite and is costly.
Chinese patent CN 108217901a describes a method for degrading hydroxylamine and/or hydroxylamine salt in wastewater, which mainly utilizes a certain acidity to dissolve ferric oxide and other ferric iron-containing compounds, and finally reduces the concentration of hydroxylamine through redox reaction, however, because the oxidation property of ferric ions is weak, the amount of ferric ions needs to be excessive, the dosage is large, the cost is high, and a large amount of solid waste can be generated, which causes secondary pollution.
Chinese patent CN 109205840a describes a method for treating hydroxylamine waste water, which mainly uses the strong oxidizing property of hydrogen peroxide and ferric ions to degrade hydroxylamine in waste water, however, the strong oxidizing agent hydrogen peroxide is used in the treatment process, so that the hydroxylamine degradation rate is too fast, the reaction heat release is obvious, and certain potential safety hazard exists. Moreover, the hydrogen peroxide can convert some organic matters in the wastewater into peroxide, and certain explosion risk may exist in subsequent treatment.
The present application was made based on this.
Disclosure of Invention
Aiming at the defects existing in the existing hydroxylamine and/or hydroxylamine salt-containing wastewater treatment, the application provides a method for mildly treating the hydroxylamine and/or hydroxylamine salt-containing waste liquid, and the treated waste liquid has stable property and is convenient for subsequent recycling.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
a method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt is characterized by comprising the following steps: (1) adding a certain amount of water into the waste liquid containing hydroxylamine and/or hydroxylamine salt for dilution; (2) heating and stirring to dissolve insoluble substances in the waste liquid, and adjusting the pH value of the waste liquid to 5-7; (3) preparing a sodium nitrite aqueous solution with a certain concentration, and dropwise adding the sodium nitrite aqueous solution into the waste liquid within a certain time; (4) after the dripping is finished, the mixture is stirred for a certain time under the condition of heat preservation.
In this embodiment, the hydroxylamine salt may be selected from one or more of hydroxylamine hydrochloride, hydroxylamine nitrate, hydroxylamine sulfate and hydroxylamine phosphate.
In this scheme, earlier the waste liquid of treating is diluted with water, can reduce the concentration of organic matter in the waste liquid, promotes the dissolution of solid in the waste liquid of treating through heating stirring and pH adjustment, can make the waste liquid of treating be in comparatively mild state moreover. When the diluted hydroxylamine is heated, stirred and dissolved, the heating temperature is not too high, preferably controlled at 20-40 ℃, solid in the waste liquid to be treated is difficult to dissolve due to too low temperature, and hydroxylamine is automatically decomposed due to too high temperature, so that safety risks such as explosion are generated.
In the pH adjustment, the pH can be adjusted according to the actual pH of the waste liquid to be treated. If the pH value of the waste liquid to be treated is higher (pH is more than or equal to 10), hydrochloric acid, sulfuric acid and the like can be adopted, and the type of anions in the acid used in the acidity adjustment is preferably consistent with that of anions in hydroxylamine salt in the waste liquid to be treated; if the pH value of the waste liquid to be treated is lower (pH is less than or equal to 2), sodium hydroxide, potassium hydroxide and the like can be adopted. The acid or alkali used is easy to obtain, the cost is low, and the use is convenient. The pH of the waste liquid to be treated can be adjusted to be milder in the subsequent reaction, and therefore the reaction is preferably carried out while controlling the pH to 5 to 7. The waste liquid after pH adjustment can also reduce the corrosion to the reactor, the storage tank, the pipeline and other equipment.
According to the scheme, sodium nitrite solution is added to enable sodium nitrite and hydroxylamine to generate oxidation-reduction reaction, so that degradation of hydroxylamine and/or hydroxylamine salt in waste liquid to be treated is realized. The reaction of the sodium nitrite and the hydroxylamine is mild under low concentration, the heat release is not high, the reaction rate is controllable, the safety is higher, the cost is low, the operation is convenient, less solid waste is generated, and the organic solvent in the waste liquid after treatment is easy to recover.
In order to effectively control the reaction rate, firstly, in the step (1), adding a certain amount of water into the waste liquid containing hydroxylamine and/or hydroxylamine salt for dilution, wherein the added amount of water is 10-100% of the volume of the waste liquid containing hydroxylamine and/or hydroxylamine salt to be treated, and the hydroxylamine salt in the waste liquid is completely dissolved; secondly, in the step (3), firstly adding water into sodium nitrite to prepare an aqueous solution, controlling the concentration of the sodium nitrite aqueous solution to be 0.08-0.5 kg/L, adopting a dropwise adding mode by adding the sodium nitrite, and controlling the dropwise adding time to be 0.2-3 h; the molar ratio of the use amount of the sodium nitrite to the hydroxylamine component is controlled to be 0.5-1.5: 1.
in order to save the reaction time, after the sodium nitrite solution is dripped, the diluted waste liquid is stirred at a controlled temperature, wherein the temperature is controlled to be 20-60 ℃, and preferably 30-50 ℃. The reaction of hydroxylamine and hydroxylamine salt with sodium nitrite can be effectively promoted in the temperature range. The heat preservation time is controlled to be 0.5-4 hours.
The mechanism of the invention is as follows: by adding sodium nitrite, hydroxylamine and sodium nitrite in the waste liquid to be treated are subjected to oxidation-reduction reaction and converted into gases of sodium chloride and nitrous oxide, thereby realizing the degradation of hydroxylamine and hydroxylamine salt.
According to the invention, the waste liquid is diluted, heated, stirred and adjusted in pH, the sodium nitrite is prepared into an aqueous solution, and a dripping mode is adopted, so that the reaction is mild, the degradation process speed is controllable, the cost is low, the safety is high, and less solid waste is generated; and the treated waste liquid can be directly discharged or the organic solvent in the waste liquid is easy to recover, so that the method is green and environment-friendly and is suitable for industrial application. The method can be used for treating the waste liquid of hydroxylamine and hydroxylamine salt with higher concentration, and has higher economic value.
Detailed Description
Example 1: treatment of wastewater containing hydroxylamine and hydroxylamine salt
Taking 175ml of hydroxylamine-containing waste liquid, adding 25ml of water for dilution, measuring the pH value to be 5, heating to 40 ℃, and stirring; a solution of 9.5g (0.14mol) of sodium nitrite and 100ml of water in sodium nitrite is prepared and slowly added dropwise to the diluted hydroxylamine-containing waste liquid by a constant pressure dropping funnel. The temperature change of the waste liquid and the generated foam are observed in the dripping process, and the reaction rate is controlled. After the dropwise addition, the temperature is controlled to be 45 ℃ and stirring is continued for 2 hours.
Example 2: treatment of wastewater containing hydroxylamine and hydroxylamine salt
175ml of hydroxylamine-containing waste liquid with the hydroxylamine concentration of 1mol/L is taken, 25ml of water is added for dilution, the pH value is measured to be 5, the solution is heated to 40 ℃ and stirred, 13.9g (0.2mol) of sodium nitrite and 100ml of water are prepared, and the solution is slowly dripped by a constant pressure dropping funnel. The temperature change of the waste liquid and the generated foam are observed in the dripping process, and the reaction rate is controlled. After the dropwise addition, the temperature is controlled to be 45 ℃ and stirring is continued for 2 hours.
Example 3: treatment of wastewater containing hydroxylamine and hydroxylamine salt
175ml of hydroxylamine-containing waste liquid with the hydroxylamine concentration of 1mol/L is taken, 25ml of water is added for dilution, the pH value is measured to be 5, the solution is heated to 40 ℃ and stirred, 18.5g (0.27mol) of sodium nitrite and 100ml of water are prepared, and the solution is slowly dripped by a constant pressure dropping funnel. The temperature change of the waste liquid and the generated foam are observed in the dripping process, and the reaction rate is controlled. After the dropwise addition, the temperature is controlled to be 45 ℃ and stirring is continued for 2 hours.
Example 4:
taking 50g of the post-treatment mother liquor obtained in the examples 1 to 3 respectively, dividing the post-treatment mother liquor into two equal parts, wherein one part is concentrated to about 10g respectively to obtain 7 samples of post-treatment mother liquor concentrate and non-post-treatment hydroxylamine-containing waste liquor, and carrying out DSC test to obtain the thermal stability of the samples.
DSC test results show that the secondary decomposition heat release initial temperature in the hydroxylamine-containing waste liquid without post-treatment is 87.5 ℃, and the specific heat release is 110.61J/g; the heat release of material decomposition is small, and the potential explosion danger exists. While the mother liquor treated by 9.5g/13.9g/18.5g of NaNO2 and the treated mother liquor concentrate have no secondary decomposition and heat release phenomena detected in the test process, and the materials have no potential explosion hazard.
The experiment shows that the sodium nitrite can effectively treat the waste water containing hydroxylamine and/or hydroxylamine salt, the method is mild, and the treated waste liquid has stable property and can be used for subsequent recycling.
The above description is provided for the purpose of describing the preferred embodiments of the present invention in more detail, and it should not be construed that the embodiments of the present invention are limited to the description above, and it will be apparent to those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the present invention.
Claims (8)
1. A method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt is characterized by comprising the following steps:
(1) adding a certain amount of water into the waste liquid containing hydroxylamine and/or hydroxylamine salt for dilution;
(2) heating and stirring to dissolve insoluble substances in the waste liquid, and adjusting the pH value of the waste liquid to 5-7;
(3) preparing a sodium nitrite aqueous solution with a certain concentration, and dropwise adding the sodium nitrite aqueous solution into the waste liquid within a certain time;
(4) after the dripping is finished, the mixture is stirred for a certain time under the condition of heat preservation.
2. The treatment method according to claim 1, wherein the hydroxylamine salt is one or more selected from the group consisting of hydroxylamine hydrochloride, hydroxylamine nitrate, hydroxylamine sulfate and hydroxylamine phosphate.
3. A treatment process according to claim 1, wherein the amount of water added in step (1) is from 10% to 100% by volume of the waste liquid containing hydroxylamine and hydroxylamine salt to be treated, preferably such that the hydroxylamine salt is completely dissolved in the waste liquid.
4. The process of claim 1, wherein the heating temperature in step (2) is selected from 20 to 40 ℃.
5. The treatment method according to claim 1, wherein in the step (3), the molar ratio of the sodium nitrite to the hydroxylamine component is 0.5 to 1.5: 1; the concentration of the sodium nitrite aqueous solution is selected from 0.08-0.5 kg/L.
6. The treatment method according to claim 1, wherein in the step (3), the dropping time is selected from 0.2 to 3 hours.
7. The treatment method according to claim 1, wherein in the step (4), the heat preservation temperature is selected from 20-60 ℃, preferably 30-50 ℃; the heat preservation time is selected from 0.5-4 h.
8. The treatment method according to claim 1, wherein the reagent for adjusting pH in step 2) is selected from any one of hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid, or any one of sodium hydroxide and potassium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337822.9A CN112875833A (en) | 2021-03-30 | 2021-03-30 | Method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337822.9A CN112875833A (en) | 2021-03-30 | 2021-03-30 | Method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112875833A true CN112875833A (en) | 2021-06-01 |
Family
ID=76040253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110337822.9A Pending CN112875833A (en) | 2021-03-30 | 2021-03-30 | Method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112875833A (en) |
-
2021
- 2021-03-30 CN CN202110337822.9A patent/CN112875833A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101475251B (en) | Composite denitrification agent for treating medium concentration ammonia nitrogen wastewater and denitrification method | |
| CN108190976B (en) | Wastewater treatment agent, preparation method and application method thereof | |
| US6332986B1 (en) | Treatment of water containing organic wastes with ammonium nitrate | |
| CN100494097C (en) | Method for treating wastewater from production of chlorated fulminuric acid | |
| CN101502746A (en) | Method for processing nitrous oxides in chlorinated exhaust of nitroaromatic compounds | |
| CN100526237C (en) | Method of processing hydrazine hydrate waste water by ketone linking nitrogen method | |
| CN101602536A (en) | A kind of preparation method who is used for the compound oxidant of catalytic oxidation treatment of high concentration waste water | |
| CN103496777A (en) | Pretreatment method of ammonia-nitrogen wastewater | |
| CN110526380A (en) | A method of processing uns-dimethylhydrazine waste water | |
| CA1097082A (en) | Compositions and method for inhibiting formation of explosive compounds and conditions in silvering concentrates | |
| KR20150094514A (en) | Removing method of hydrogen peroxide from sulfuric acid-hydrogen peroxide solution and treatment agent thereof | |
| CN112875833A (en) | Method for treating waste liquid containing hydroxylamine and/or hydroxylamine salt | |
| CN109205840B (en) | Method for treating hydroxylamine wastewater | |
| CN104628202A (en) | Natural freezing-Fenton oxidation-coagulation combined method for treating TNT red water | |
| CN108147579B (en) | Method for recycling active ingredients in Fumei production wastewater | |
| JP5515164B2 (en) | Method for recovering ammonium nitrate from wastewater | |
| CN106830280A (en) | The method for treating water of instability halogenated disinfection by-products in a kind of utilization persulfate in-situ control swimming-pool water | |
| WO2004020347A1 (en) | Method of treating waste water containing high level nitrate-nitrogen | |
| US7736519B2 (en) | Method for processing aqueous effluents containing metal nitrate or nitrite salts | |
| CN104276647B (en) | A kind of processing method of waste water | |
| KR102052582B1 (en) | Method for decomposing hydrazine in aqueous solution | |
| WO2003020648A1 (en) | Method for purifying solutions containing cyanides, nitriles and nitrogen-compounds | |
| CN104944497A (en) | Method for treating high-concentration ammonia nitrogen in coal chemical industry wastewater | |
| JP2002079278A (en) | Method for treating hydrazine-containing wastewater | |
| CN218371769U (en) | Titanium white metatitanic acid bleaching system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |