CN108996736A - A method of high valence chrome waste water is handled with alcohol or aldehyde - Google Patents
A method of high valence chrome waste water is handled with alcohol or aldehyde Download PDFInfo
- Publication number
- CN108996736A CN108996736A CN201810723604.7A CN201810723604A CN108996736A CN 108996736 A CN108996736 A CN 108996736A CN 201810723604 A CN201810723604 A CN 201810723604A CN 108996736 A CN108996736 A CN 108996736A
- Authority
- CN
- China
- Prior art keywords
- alcohol
- industrial
- hexavalent chromium
- added
- aldehyde
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/70—Treatment of water, waste water, or sewage by reduction
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The present invention provides a kind of methods with alcohol or aldehyde processing high valence chrome waste water, the following steps are included: under mechanical stirring, industrial hexavalent chromium wastewater and C1~C4 alcohol is added, the molar ratio of Cr VI and alcohol is 1:1~2 in industrial hexavalent chromium wastewater, it stirs evenly, 1~5h is reacted under the conditions of 40~65 DEG C, C1~C4 alcohol reduction of hexavalent chromium is trivalent chromium, C1~C4 alcohol is converted into C1~C4 aldehyde and is further converted into C1~C4 acid, it is cooled to room temperature, sodium hydroxide is added, the molar ratio of Cr VI and NaOH are 1:2~4 in industrial hexavalent chromium wastewater, it is precipitated, it is to be precipitated completely after be filtered, sediment is separated with supernatant liquor, obtain clarification water phase, supernatant liquor is taken to detectContent.The present invention makees reducing agent with lower alcohol or aldehyde, by hexavalent chrome reduction at trivalent chromium, forms chromium hydroxide precipitation through sodium hydroxide and is filtered to remove, in water
Description
Technical field
The invention belongs to Industrial Wastewater Treatment, specifically a kind of method with alcohol or aldehyde processing high valence chrome waste water.
Background technique
For high valence chrome (chromium trioxide, dichromic acid, chromic acid) due to oxidation potential height, oxidability is strong, and Costco Wholesale is low, is one
The common oxidant of kind industry, if Organic Alcohol is oxidized to carboxylic acid, the processes such as ketone generally all select high valence chrome (chromium trioxide, weight chromium
Acid, chromic acid).With the expansion of commercial production scale, industrial chrome wastewater discharge increases year by year, but chromium is one of heavy metal,
How to eliminate chromium heavy metal pollution is one of the serious problem faced now.
Trivalent chromium is nearly free from illeffects to human body, has no the report for causing indusqtrial poisoning.Cr VI enters human body
Chromium accumulated in tissue, metabolism and the speed removed are slow.After chromium enters blood, mainly with the ball egg in blood plasma
White, albumin, r- globulin combine.Cr VI also can pass through erythrocyte membrane, can have 50% Cr VI to enter in 15 minutes
Cell, into red blood cell after in conjunction with hemoglobin.The metabolism of chromium is mainly discharged from kidney, is discharged on a small quantity through excrement.Cr VI pair
People is mainly chronic murder by poisoning, it can invade human body by alimentary canal, respiratory tract, skin and mucous membrane, is mainly accumulated in vivo
In liver, kidney and endocrine gland.Lung is then easily accumulated in by what respiratory tract entered.Cr VI has strong oxidizing property, so in chronic
Poison often starts gradually to develop to incurable with local lesion.When invading human body through respiratory tract, starts to encroach on the upper respiratory tract, draw
Play rhinitis, pharyngitis and laryngitis.The extensive lesion for causing kidney, liver, nervous system and blood, leads to death.Long-term occupation connects
Touching, air pollution or the dust for contacting chromium, can cause skin allergy and ulcer, inflammation, necrosis or even the lung cancer of nasal cavity.Orally
Intake, can cause injury of gastrointestinal tract, dyshaemia, kidney failure.
Therefore, the safe handling of high valence chrome waste water, safety dumping are all urgently to be resolved.In the prior art, most of chromium waste water is used
Low price sulphur is restored, and is formed high-salt wastewater, is caused water pollution.
Summary of the invention
The object of the present invention is to provide a kind of methods with alcohol or aldehyde processing high valence chrome waste water.
The technical solution of the invention is as follows: a method of high valence chrome waste water is handled with alcohol or aldehyde, comprising the following steps:
Under mechanical stirring, industrial hexavalent chromium wastewater and C1~C4 alcohol is added, the molar ratio of Cr VI and alcohol in industrial hexavalent chromium wastewater
It for 1:1~2, stirs evenly, 1~5h is reacted under the conditions of 40~65 DEG C, C1~C4 alcohol reduction of hexavalent chromium is trivalent chromium, C1~C4
Alcohol is converted into C1~C4 aldehyde and is further converted into C1~C4 acid, is cooled to room temperature, and sodium hydroxide is added, and industrial Cr VI is useless
In water the molar ratio of Cr VI and NaOH be 1:2~4, precipitated, it is to be precipitated completely after be filtered, by sediment and upper layer
Clear liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent.
Under mechanical stirring, industrial hexavalent chromium wastewater and C1~C4 alcohol, Cr VI and alcohol in industrial hexavalent chromium wastewater is added
Molar ratio be 1:1.6~2, stir evenly, 3~4h reacted under the conditions of 60~65 DEG C, is cooled to room temperature, hydroxide is added
Sodium, the molar ratio of Cr VI and NaOH are 1:2.5~3.5 in industrial hexavalent chromium wastewater, are precipitated, it is to be precipitated completely after carry out
Filtering, sediment is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent.
Under mechanical stirring, industrial hexavalent chromium wastewater and C1~C4 aldehyde, Cr VI and aldehyde in industrial hexavalent chromium wastewater is added
Molar ratio be 1:1~4, stir evenly, under the conditions of 20~60 DEG C react 1~5h, C1~C4 aldehyde reduction of hexavalent chromium be trivalent
Chromium, C1~C4 aldehyde are converted into C1~C4 acid, are cooled to room temperature, and sodium hydroxide is added, in industrial hexavalent chromium wastewater Cr VI with
The molar ratio of NaOH is 1:2~4, is precipitated, it is to be precipitated completely after be filtered, sediment and supernatant liquor are divided
From, obtain clarification water phase, take supernatant liquor to detectContent.
Under mechanical stirring, industrial hexavalent chromium wastewater and formaldehyde is added, Cr VI and formaldehyde in industrial hexavalent chromium wastewater
Molar ratio is 1:3~4, is stirred evenly, and 3~5h is reacted under the conditions of 40~60 DEG C, is cooled to room temperature, and sodium hydroxide is added,
In industrial hexavalent chromium wastewater the molar ratio of Cr VI and NaOH be 1:2.5~3.5, precipitated, it is to be precipitated completely after carried out
Filter, sediment is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent.
Technical effect of the invention: the present invention makees reducing agent with lower alcohol or aldehyde, by hexavalent chrome reduction at trivalent chromium, through hydrogen
Sodium oxide molybdena forms chromium hydroxide precipitation and is filtered to remove, easy to operate, in waterTreatment effect is obvious.
Specific embodiment
Embodiment 1
Under mechanical stirring, industrial chrome waste water 2L and methanol 20g, H in industrial chrome waste water are added into 5L there-necked flask2CrO4
Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, and is reacted under the conditions of 65 DEG C
3h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, by sediment with it is upper
Layer clear liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 2
Under mechanical stirring, industrial chrome waste water 2L and methanol 20g, H in industrial chrome waste water are added into 5L there-necked flask2CrO4
Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, and is reacted under the conditions of 60 DEG C
5h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, by sediment with it is upper
Layer clear liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 3
Under mechanical stirring, industrial chrome waste water 2L and methanol 30g, H in industrial chrome waste water are added into 5L there-necked flask2CrO4
Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, and is reacted under the conditions of 50 DEG C
4h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, by sediment with it is upper
Layer clear liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 4
Under mechanical stirring, industrial chrome waste water 2L and ethyl alcohol 29.6g is added into 5L there-necked flask, in industrial chrome waste water
H2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, in 65 DEG C of conditions
Lower reaction 3h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, will precipitate
Object is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 5
Under mechanical stirring, industrial chrome waste water 2L and ethyl alcohol 29.6g is added into 5L there-necked flask, in industrial chrome waste water
H2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, in 60 DEG C of conditions
Lower reaction 5h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, will precipitate
Object is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 6
Under mechanical stirring, industrial chrome waste water 2L and propyl alcohol 38.5g is added into 5L there-necked flask, in industrial chrome waste water
H2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, in 65 DEG C of conditions
Lower reaction 5h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, will precipitate
Object is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 7
Under mechanical stirring, industrial chrome waste water 2L and methanol 20g, H in industrial chrome waste water are added into 5L there-necked flask2CrO4
Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, and is reacted under the conditions of 65 DEG C
3h, is cooled to room temperature, and sodium hydroxide 30.77g is added, is precipitated, it is to be precipitated completely after be filtered, by sediment with it is upper
Layer clear liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 8
Under mechanical stirring, industrial chrome waste water 2L and methanol 20g, H in industrial chrome waste water are added into 5L there-necked flask2CrO4
Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, and is reacted under the conditions of 65 DEG C
3h, is cooled to room temperature, and sodium hydroxide 61.53g is added, is precipitated, it is to be precipitated completely after be filtered, by sediment with it is upper
Layer clear liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent,
In order to determine optimum material proportion and optimised process step of the invention, a large amount of laboratory research examination has been carried out
It tests, various test situations are as follows:
1, reaction temperature influences chromium wastewater treatment
Molar ratio according to chromium waste water chromic acid, methanol and NaOH is 1:1.67:3, reacts 3 at 40,50,60,65 DEG C respectively
Hour, it is cooled to room temperature, sodium hydroxide is added, then precipitating filters, obtain clarification water phase.Test result is shown in Table 1.
Influence of 1 reaction temperature of table to chromium wastewater treatment
Seen from table 1,60~65 DEG C of reactions, 3 hours treatment conditions are preferable, wherein 65 DEG C of reflow treatment results are best.
2, influence of the reaction time to chromium wastewater treatment
It is 1:1.67:3 according to the molar ratio of chromium waste water chromic acid, methanol and NaOH, respectively in 65 DEG C of back flow reactions 1,2,3,4
Hour, it is cooled to room temperature, sodium hydroxide is added, then precipitating filters, obtain clarification water phase.Test result is shown in Table 2.
Influence of 2 reaction time of table to chromium wastewater treatment
As can be seen from Table 2,65 DEG C of reactions, 3~4 hours treatment conditions are preferable, treatment conditions are best within 3 hours.
Compbined test 1 and 2, the present invention select 40~65 DEG C to react 1~4 hour, and preferably 60~65 DEG C are reacted 3~4 hours,
Most preferably 65 DEG C are reacted 3 hours.
3, influence of the alcohol type to chromium wastewater treatment
It is respectively 1:1.67:3 according to the molar ratio of chromium waste water chromic acid, alcohol (methanol, ethyl alcohol, propyl alcohol, butanol) and NaOH, 65
DEG C back flow reaction 3 hours, it is cooled to room temperature, sodium hydroxide is added, then precipitating filters, obtain clarification water phase.Test result
It is shown in Table 3.
Influence of the 3 alcohol type of table to chromium wastewater treatment
Seen from table 3: methanol, the generally the least expensive treatment conditions of ethyl alcohol price are preferable, and methyl alcohol process condition is best.
4, influence of the methanol usage to chromium wastewater treatment
It is respectively 1:1:3,1:1.3:3,1:1.6:3,1:1.67 according to the molar ratio of chromium waste water chromic acid, methanol and NaOH:
3,1:1.7:3,1:2:3,65 DEG C back flow reaction 3 hours, be cooled to room temperature, sodium hydroxide be added, then precipitating is filtered, obtained
To clarification water phase.Test result is shown in Table 4.
Influence of 4 methanol usage of table to chromium wastewater treatment
From table 4: chromium waste water chromic acid, methanol and NaOH match, 1:1.67:3 preferable in 1:1.6~2:3 treatment conditions
Treatment conditions are best.
5, influence of the NaOH dosage to chromium wastewater treatment
Respectively according to chromium waste water chromic acid, methanol and NaOH molar ratio be 1:1.67:2,1:1.67:2.5,1:1.67:3,
1:1.67:3.5,1:1.67:4,65 DEG C back flow reaction 3 hours, be cooled to room temperature, be added sodium hydroxide, precipitating, then mistake
Filter obtains clarification water phase.Test result is shown in Table 5.
Influence of the table 5NaOH dosage to chromium wastewater treatment
From table 5: chromium waste water chromic acid, methanol and NaOH proportion are preferable in the treatment conditions of 1:1.67:2.5~3.5, and 1:
1.67:3 treatment conditions are best.
Compbined test 3,4 and 5 as a result, the present invention select chromium waste water chromic acid, alcohol (methanol, ethyl alcohol, propyl alcohol, butanol) with
NaOH, molar ratio be 1:1:2~4,1:1.3:2~4,1:1.6:2~4,1:1.67:2~4,1:1.7:2~4,1:2:2~4,
Preferred chromium waste water chromic acid, alcohol (methanol, ethyl alcohol) and NaOH molar ratio are 1:1.6~2:3, optimal selection chromium waste water chromic acid, methanol
With NaOH, molar ratio 1:1.67:3.
Embodiment 9
Under mechanical stirring, industrial chrome waste water 2L and 37% formalin 104g, industrial chrome are added into 5L there-necked flask
H in waste water2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, 40
React 3h under the conditions of DEG C, be cooled to room temperature, sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered,
Sediment is separated with supernatant liquor, clarification water phase is obtained, supernatant liquor is taken to detectContent,
Embodiment 10
Under mechanical stirring, industrial chrome waste water 2L and 37% formalin 104g, industrial chrome are added into 5L there-necked flask
H in waste water2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, 60
React 5h under the conditions of DEG C, be cooled to room temperature, sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered,
Sediment is separated with supernatant liquor, clarification water phase is obtained, supernatant liquor is taken to detectContent,
Embodiment 11
Under mechanical stirring, industrial chrome waste water 2L and 37% formalin 104g, industrial chrome are added into 5L there-necked flask
H in waste water2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, 20
React 5h under the conditions of DEG C, be cooled to room temperature, sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered,
Sediment is separated with supernatant liquor, clarification water phase is obtained, supernatant liquor is taken to detectContent,
Embodiment 12
Under mechanical stirring, industrial chrome waste water 2L and 40% acetaldehyde solution 129.5g, industry are added into 5L there-necked flask
H in chromium waste water2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, 40
React 3h under the conditions of DEG C, be cooled to room temperature, sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, will
Sediment is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 13
Under mechanical stirring, industrial chrome waste water 2L and propionic aldehyde 44.6g is added into 5L there-necked flask, in industrial chrome waste water
H2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, in 40 DEG C of conditions
Lower reaction 3h, is cooled to room temperature, and sodium hydroxide 46.15g is added, is precipitated, it is to be precipitated completely after be filtered, will precipitate
Object is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 14
Under mechanical stirring, industrial chrome waste water 2L and 37% formalin 104g, industrial chrome are added into 5L there-necked flask
H in waste water2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, 40
React 3h under the conditions of DEG C, be cooled to room temperature, sodium hydroxide 30.77g is added, is precipitated, it is to be precipitated completely after be filtered, will
Sediment is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
Embodiment 15
Under mechanical stirring, industrial chrome waste water 2L and 37% formalin 104g, industrial chrome are added into 5L there-necked flask
H in waste water2CrO4Concentration be 22690mg/L, H2CrO4Calculation amount is 45.38g=2L*22690mg/L, is stirred evenly, 40
React 3h under the conditions of DEG C, be cooled to room temperature, sodium hydroxide 61.53g is added, is precipitated, it is to be precipitated completely after be filtered, will
Sediment is separated with supernatant liquor, obtains clarification water phase, supernatant liquor is taken to detectContent,
In order to determine optimum material proportion and optimised process step of the invention, a large amount of laboratory research examination has been carried out
It tests, various test situations are as follows:
6, reaction temperature influences chromium wastewater treatment
Molar ratio according to chromium waste water chromic acid, formaldehyde and NaOH is 1:3.33:3, anti-at 20,30,40,50,60 DEG C respectively
It answers 3 hours, is cooled to room temperature, sodium hydroxide is added, then precipitating filters, obtain clarification water phase.Test result is shown in Table 6.
Influence of 6 reaction temperature of table to chromium wastewater treatment
By table 6 as it can be seen that 40~60 DEG C of reactions, 3 hours treatment conditions are preferable, wherein 40 DEG C of processing results are best.
7, influence of the reaction time to chromium wastewater treatment
Molar ratio according to chromium waste water chromic acid, formaldehyde and NaOH is 1:3.33:3, small in 40 DEG C of reactions 1,2,3,4,5 respectively
When, it is cooled to room temperature, sodium hydroxide is added, then precipitating filters, obtain clarification water phase.Test result is shown in Table 7.
Influence of 7 reaction time of table to chromium wastewater treatment
By table 7 as it can be seen that 3~5 hours treatment conditions of reaction are preferable, treatment conditions are best within 3 hours.
Compbined test 6 and 7, the present invention select 20~60 DEG C to react 1~5 hour, and preferably 40~60 DEG C are reacted 3~5 hours,
Most preferably 40 DEG C are reacted 3 hours.
8, influence of the aldehyde type to chromium wastewater treatment
It is respectively 1:3.33:3 according to the molar ratio of chromium waste water chromic acid, aldehyde (formaldehyde, acetaldehyde, propionic aldehyde, butyraldehyde) and NaOH, 40
It DEG C reaction 3 hours, is cooled to room temperature, sodium hydroxide is added, then precipitating filters, obtain clarification water phase.Test result is shown in Table
8。
Influence of the 8 aldehyde type of table to chromium wastewater treatment
From table 8: formaldehyde, the generally the least expensive treatment conditions of acetaldehyde price are preferable, and formaldehyde treated condition is best.
9, influence of the formaldehyde dosage to chromium wastewater treatment
It is respectively 1:1:3,1:2:3,1:3:3,1:3.33:3,1 according to the molar ratio of chromium waste water chromic acid, formaldehyde and NaOH:
3.67:3,1:4:3,40 DEG C are reacted 3 hours, and room temperature is cooled to, and sodium hydroxide is added, then precipitating filters, obtains primary water
Phase.Test result is shown in Table 9.
Influence of the 9 formaldehyde dosage of table to chromium wastewater treatment
From table 9: chromium waste water chromic acid, formaldehyde and NaOH match, 1:3.33:3 preferable in 1:3.33~4:3 treatment conditions
Treatment conditions are best.
10, influence of the NaOH dosage to chromium wastewater treatment
Respectively according to chromium waste water chromic acid, formaldehyde and NaOH molar ratio be 1:3.33:2,1:3.33:2.5,1:3.33:3,
1:3.33:3.5,1:3.33:4,40 DEG C back flow reaction 3 hours, be cooled to room temperature, be added sodium hydroxide, precipitating, then mistake
Filter obtains clarification water phase.Test result is shown in Table 10.
Influence of the table 10NaOH dosage to chromium wastewater treatment
From table 10: chromium waste water chromic acid, formaldehyde and NaOH proportion are preferable in the treatment conditions of 1:3.33:2.5~3.5, and 1:
3.33:3 treatment conditions are best.
Compbined test 8,9 and 10 as a result, the present invention select chromium waste water chromic acid, aldehyde (formaldehyde, acetaldehyde, propionic aldehyde, butyraldehyde) with
NaOH, molar ratio be 1:1:2~4,1:2:2~4,1:3:2~4,1:3.33:2~4,1:3.67:2~4,1:4:2~4, preferably
Chromium waste water chromic acid, aldehyde (formaldehyde, acetaldehyde) and NaOH molar ratio are 1:3~4:2.5~3.5, optimal selection chromium waste water chromic acid, formaldehyde
With NaOH, molar ratio 1:3.33:3.
Claims (4)
1. a kind of method with alcohol or aldehyde processing high valence chrome waste water, it is characterised in that: the following steps are included: under mechanical stirring,
Industrial hexavalent chromium wastewater and C1~C4 alcohol is added, the molar ratio of Cr VI and alcohol is 1:1~2, stirring in industrial hexavalent chromium wastewater
Uniformly, under the conditions of 40~65 DEG C react 1~5h, C1~C4 alcohol reduction of hexavalent chromium be trivalent chromium, C1~C4 alcohol be converted into C1~
C4 aldehyde is further converted into C1~C4 acid, is cooled to room temperature, and sodium hydroxide is added, in industrial hexavalent chromium wastewater Cr VI with
The molar ratio of NaOH is 1:2~4, is precipitated, it is to be precipitated completely after be filtered, sediment and supernatant liquor are divided
From, obtain clarification water phase, take supernatant liquor to detectContent.
2. as described in claim 1 with the method for alcohol or aldehyde processing high valence chrome waste water, it is characterised in that: under mechanical stirring,
Industrial hexavalent chromium wastewater and C1~C4 alcohol is added, the molar ratio of Cr VI and alcohol is 1:1.6~2 in industrial hexavalent chromium wastewater, is stirred
It mixes uniformly, 3~4h is reacted under the conditions of 60~65 DEG C, is cooled to room temperature, be added sodium hydroxide, six in industrial hexavalent chromium wastewater
The molar ratio of valence chromium and NaOH be 1:2.5~3.5, precipitated, it is to be precipitated completely after be filtered, sediment is clear with upper layer
Liquid is separated, and obtains clarification water phase, supernatant liquor is taken to detectContent.
3. as described in claim 1 with the method for alcohol or aldehyde processing high valence chrome waste water, it is characterised in that: the following steps are included:
Under mechanical stirring, industrial hexavalent chromium wastewater and C1~C4 aldehyde is added, the molar ratio of Cr VI and aldehyde in industrial hexavalent chromium wastewater
It for 1:1~4, stirs evenly, 1~5h is reacted under the conditions of 20~60 DEG C, C1~C4 aldehyde reduction of hexavalent chromium is trivalent chromium, C1~C4
Aldehyde is converted into C1~C4 acid, is cooled to room temperature, and sodium hydroxide is added, mole of Cr VI and NaOH in industrial hexavalent chromium wastewater
Than being precipitated for 1:2~4, it is to be precipitated completely after be filtered, sediment is separated with supernatant liquor, is clarified
Water phase takes supernatant liquor to detectContent.
4. as claimed in claim 3 with the method for alcohol or aldehyde processing high valence chrome waste water, it is characterised in that: under mechanical stirring,
Industrial hexavalent chromium wastewater and formaldehyde is added, the molar ratio of Cr VI and formaldehyde is 1:3~4 in industrial hexavalent chromium wastewater, and stirring is equal
It is even, 3~5h is reacted under the conditions of 40~60 DEG C, is cooled to room temperature, and sodium hydroxide, Cr VI in industrial hexavalent chromium wastewater is added
Be 1:2.5~3.5 with the molar ratio of NaOH, precipitated, it is to be precipitated completely after be filtered, by sediment and supernatant liquor into
Row separation obtains clarification water phase, supernatant liquor is taken to detectContent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723604.7A CN108996736A (en) | 2018-07-04 | 2018-07-04 | A method of high valence chrome waste water is handled with alcohol or aldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810723604.7A CN108996736A (en) | 2018-07-04 | 2018-07-04 | A method of high valence chrome waste water is handled with alcohol or aldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108996736A true CN108996736A (en) | 2018-12-14 |
Family
ID=64599324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810723604.7A Pending CN108996736A (en) | 2018-07-04 | 2018-07-04 | A method of high valence chrome waste water is handled with alcohol or aldehyde |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108996736A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115385483A (en) * | 2022-09-16 | 2022-11-25 | 嘉兴学院 | Environment-friendly treatment method for fur processing wastewater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787952A (en) * | 2015-03-25 | 2015-07-22 | 湖南永清环保研究院有限责任公司 | Process for recovering chromium from hexavalent chromium-containing wastewater |
| CN106477766A (en) * | 2015-11-24 | 2017-03-08 | 湖南衡阳新澧化工有限公司 | A kind of waste electroplating liquor containing chromium processing method |
-
2018
- 2018-07-04 CN CN201810723604.7A patent/CN108996736A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104787952A (en) * | 2015-03-25 | 2015-07-22 | 湖南永清环保研究院有限责任公司 | Process for recovering chromium from hexavalent chromium-containing wastewater |
| CN106477766A (en) * | 2015-11-24 | 2017-03-08 | 湖南衡阳新澧化工有限公司 | A kind of waste electroplating liquor containing chromium processing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115385483A (en) * | 2022-09-16 | 2022-11-25 | 嘉兴学院 | Environment-friendly treatment method for fur processing wastewater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108996736A (en) | A method of high valence chrome waste water is handled with alcohol or aldehyde | |
| CN113800562B (en) | Method for preparing high-purity vanadium pentoxide by precipitating vanadium from sodium salt of sodium vanadate solution | |
| CN208362040U (en) | A kind of system for processing chrome-containing wastewater | |
| CN1724406A (en) | Process for treating industrial waste water containing chromium, vanadium | |
| CN100339311C (en) | Method for preparing polymerized ferric sulfate from ferric sulfate solution | |
| CN106495365A (en) | The advanced treatment apparatus of stibium-containing wastewater and technique under a kind of low temperature environment | |
| CN206635096U (en) | The device of ferrous ion activation persulfate pretreatment lifting milipore filter water purification efficiency | |
| CN109205842A (en) | A kind of processing method of silver ammonia waste water | |
| CN109423557A (en) | A method of separating copper, tin from discarded tin copper-clad metal | |
| CN111186940A (en) | Industrial treatment method of high-valence chromium wastewater | |
| CN212076673U (en) | Laboratory COD test waste liquid processing apparatus | |
| CN114214514A (en) | Method for leaching and removing phosphorus in high-phosphorus calcine roasting vanadium-containing clinker and recycling leachate | |
| CN111453881A (en) | Laboratory COD test waste liquid treatment device and treatment method thereof | |
| CN113049739A (en) | Method for detecting heavy metal ions in industrial wastewater | |
| CN101381175A (en) | Method for treating cyaniding gold extraction waste water | |
| CN217516773U (en) | Intelligent integrated processor for heavy metal wastewater | |
| Liang et al. | Experimental study on arsenic removal from leaching solution of zinc oxide fume | |
| CN205528120U (en) | Industrial wastewater treatment device | |
| CN111470728A (en) | Waste liquid treatment system and treatment method thereof | |
| CN210915646U (en) | Comprehensive waste liquid treatment device for laboratory | |
| CN217996944U (en) | Chromium-containing wastewater treatment system | |
| CN107640849A (en) | A kind of processing method of high concentration chrome wastewater | |
| CN202193675U (en) | Integrated chromium-cyanogen wastewater treatment machine | |
| CN210974187U (en) | High-efficient electroplating contains total chromium emergency treatment device of chromium waste water | |
| CN212769901U (en) | Device for recovering magnesium sulfate from waste residues generated in borax production |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190515 Address after: 715511 Agrochemical Industrial Park, Chenzhuang Town, Pucheng County, Weinan City, Shaanxi Province Applicant after: Shaanxi Pucheng Haitai New Material Industry Co., Ltd. Address before: 710077 Vice-71 Jinye Second Road, Yanta District, Xi'an City, Shaanxi Province Applicant before: XI'AN RUILIAN NEW MATERIAL CO., LTD. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181214 |