CN114375953A - Reverse osmosis/nanofiltration bactericide suitable for alkaline water and preparation method thereof - Google Patents
Reverse osmosis/nanofiltration bactericide suitable for alkaline water and preparation method thereof Download PDFInfo
- Publication number
- CN114375953A CN114375953A CN202111656341.0A CN202111656341A CN114375953A CN 114375953 A CN114375953 A CN 114375953A CN 202111656341 A CN202111656341 A CN 202111656341A CN 114375953 A CN114375953 A CN 114375953A
- Authority
- CN
- China
- Prior art keywords
- bactericide
- reverse osmosis
- alkaline
- nanofiltration
- agent
- 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
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 36
- 239000003899 bactericide agent Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 24
- 238000001728 nano-filtration Methods 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- UUIVKBHZENILKB-UHFFFAOYSA-N 2,2-dibromo-2-cyanoacetamide Chemical compound NC(=O)C(Br)(Br)C#N UUIVKBHZENILKB-UHFFFAOYSA-N 0.000 claims abstract description 15
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003607 modifier Substances 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 239000003814 drug Substances 0.000 claims description 5
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 230000002378 acidificating effect Effects 0.000 claims description 2
- 125000003282 alkyl amino group Chemical group 0.000 claims description 2
- 125000003275 alpha amino acid group Chemical group 0.000 claims description 2
- 150000007522 mineralic acids Chemical group 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims 7
- 239000012528 membrane Substances 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001954 sterilising effect Effects 0.000 abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 5
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 230000007935 neutral effect Effects 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 230000001590 oxidative effect Effects 0.000 description 7
- WBEHKXQILJKFIN-UHFFFAOYSA-N 2-amino-2-methyltetradecanoic acid Chemical compound CCCCCCCCCCCCC(C)(N)C(O)=O WBEHKXQILJKFIN-UHFFFAOYSA-N 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 3
- WFJFGMLKAISFOZ-UHFFFAOYSA-N 1-amino-3-iminourea Chemical compound NN=C(O)N=N WFJFGMLKAISFOZ-UHFFFAOYSA-N 0.000 description 2
- 230000003115 biocidal effect Effects 0.000 description 2
- 239000003139 biocide Substances 0.000 description 2
- -1 isothiazole phosphor copper Chemical compound 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/34—Nitriles
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
- B01D65/022—Membrane sterilisation
-
- 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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/168—Use of other chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Environmental Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that: 10-20% of 2, 2-dibromo-3-nitrilopropionamide; 40-60% of dipropylene glycol; 1-2% of a modifier; 10-15% of kasong; BIT 1-5%; 0.1-1% of acid agent; 0.1 to 1 percent of alkaline agent; the balance of water. The bactericide is cathodic or nonpolar and cannot react with a reverse osmosis membrane with negative polarity to cause the fouling and blocking of a membrane. The product has obvious sterilization effect under neutral or alkaline conditions.
Description
Technical Field
The invention relates to the field of water treatment agents, in particular to a phosphorus-free scale inhibitor capable of measuring concentration of a circulating water system and a method for detecting the concentration of a medicament in circulating water.
Background
For sterilization of reverse osmosis systems, two main types are available in the market at present, one is an oxidizing bactericide, and the other is a non-oxidizing bactericide. When the oxidizing bactericide is used for sterilization, enough reducing agent needs to be added for reduction to ensure that the membrane system is not oxidized. The addition of a non-oxidizing biocide, however, requires the addition of a cathodic or nonpolar biocide, which may otherwise irreversibly affect the membrane. The isothiazole phosphor copper and the like are common non-oxidative bactericides for membrane systems, and have good bactericidal effect, but the isothiazole phosphor copper needs to be long in action time and high in requirement on pH, and if the pH of a water body exceeds 7.5, the effect is obviously reduced, and the degradation speed is very high. In a reclaimed water recycling system, particularly printing and dyeing wastewater and electroplating wastewater, the pH value reaches above 8, so oxidative sterilization is mainly used, and then reducing agent is added for reduction. The greatest disadvantage of this process treatment, however, is that if sufficient reducing agent is not added, the film is oxidized, while if excessive reducing agent is added, sulfate plasma in the feed water is increased.
Disclosure of Invention
The invention aims to overcome the defects and provide a non-oxidative bactericide which has low dosage, does not have side effect on a membrane and can still be effective in strong alkaline water.
The invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
10-20% of 2, 2-dibromo-3-nitrilopropionamide;
40-60% of dipropylene glycol;
1-2% of a modifier;
10-15% of kasong;
BIT 1-5％；
0.1-1% of acid agent;
0.1 to 1 percent of alkaline agent;
the balance of water.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the modifier is amino acid type surfactant.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the modifier is long-chain alkyl amino propionic acid.
Further, the reverse osmosis/nanofiltration bactericide suitable for alkaline water provided by the invention is characterized by comprising the following specific process steps:
s1, adding dipropylene glycol and 2, 2-dibromo-3-nitrilopropionamide in sequence, and mixing uniformly;
s2, adding an acid agent to adjust the pH value to be acidic;
s3, adding a modifier, and stirring for at least 30 min;
s4, adding an alkaline agent to adjust the pH value to be alkaline;
s5, adding the kasong and the BIT powder in sequence, and adding water to a constant volume;
s6, filtering to obtain the bactericide.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the acid agent is added in an amount of 2-6 pH.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the acid agent is an inorganic acid.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the addition amount of the alkaline agent is that the pH value of the system is adjusted to 8-11.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the alkaline agent is inorganic alkali.
Further, the invention provides a reverse osmosis/nanofiltration bactericide suitable for alkaline water, which is characterized in that:
the adding speed of each component medicament is 150-200 g/min.
The invention has the following functions and effects:
the bactericide is cathodic or nonpolar and cannot react with a reverse osmosis membrane with negative polarity to cause the fouling and blocking of a membrane. The characteristics of low dosage, strong alkali resistance and the like of the 2, 2-dibromo-3-nitrilopropionamide are kept, and the synergistic effect is achieved with the carbazone and the BIT, so that the sterilization effect of the product is very obvious under neutral or alkaline conditions.
Detailed Description
Example 1
The bactericide comprises the following components:
2, 2-dibromo-3-nitrilopropionamide: 20 percent;
dipropylene glycol: 40 percent;
dodecyl amino propionic acid: 2 percent;
kasong (10): 15 percent;
BIT：5％；
hydrochloric acid: 0.1 percent;
sodium hydroxide: 0.1 percent;
the balance of water.
The preparation method comprises the following steps: adding dipropylene glycol into a 1-ton reaction kettle, adding 2, 2-dibromo-3-nitrilopropionamide for dilution, uniformly mixing, adding hydrochloric acid to adjust the pH value to be about 3, slowly dripping a modifier, adding 150-inch of medicine at a speed of 200g/min, stirring for at least 30 minutes after adding the medicine, adjusting the pH value to be about 10 after stirring, adding carbazone and BIT powder, adding water to prepare 1000 kg, and filtering to obtain the bactericide, wherein the product is transparent viscous liquid.
Example 2
The bactericide comprises the following components:
2, 2-dibromo-3-nitrilopropionamide: 10 percent;
dipropylene glycol: 60 percent;
dodecyl amino propionic acid: 1 percent;
kasong (10): 10 percent;
BIT：1％；
hydrochloric acid: 1 percent;
sodium hydroxide: 1 percent;
the balance of water.
The preparation method comprises the following steps: adding dipropylene glycol into a 1-ton reaction kettle, adding 2, 2-dibromo-3-nitrilopropionamide for dilution, uniformly mixing, adding hydrochloric acid to adjust the pH value to 4, slowly dripping a modifier at a dosing speed of 150-.
Example 3
The bactericide comprises the following components:
2, 2-dibromo-3-nitrilopropionamide: 15 percent;
dipropylene glycol: 50 percent;
dodecyl amino propionic acid: 1 percent;
kasong (10): 12 percent;
BIT：8％；
hydrochloric acid: 0.5 percent;
sodium hydroxide: 0.5 percent;
the balance of water.
The preparation method comprises the following steps: adding dipropylene glycol into a 1-ton reaction kettle, adding 2, 2-dibromo-3-nitrilopropionamide for dilution, uniformly mixing, adding hydrochloric acid to adjust the pH value to 5, slowly dripping a modifier at a dosing speed of 150-.
Example 4
The bactericide comprises the following components:
2, 2-dibromo-3-nitrilopropionamide: 20 percent;
dipropylene glycol: 45 percent;
dodecyl amino propionic acid: 8 percent;
kasong (10): 8 percent;
BIT：5％；
hydrochloric acid: 0.1 percent;
sodium hydroxide: 0.1 percent;
the balance of water.
The preparation method comprises the following steps: adding dipropylene glycol into a 1-ton reaction kettle, adding 2, 2-dibromo-3-nitrilopropionamide for dilution, uniformly mixing, adding hydrochloric acid to adjust the pH value to 6, slowly dripping a modifier at a dosing speed of 150-.
The experimental effects are as follows:
through the experiments, under the conditions of acidity, neutrality or alkalinity and under the condition of the same dosage, the new product has very good effect and is superior to a single product.
In addition, although the 2, 2-dibromo-3-nitrilopropionamide can achieve a good effect, the long-term use of the 2, 2-dibromo-3-nitrilopropionamide is anodic, so that the service life of the membrane can be shortened, and the long-term use of the membrane can cause the polarity reduction of the membrane and irreversible influence on the water yield of the membrane through tests. The product is negative, and the test can not change the polarity of the membrane and influence the service life of the membrane.
Claims (9)
1. A reverse osmosis/nanofiltration bactericide suitable for alkaline water is characterized in that:
2. a reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 1, wherein:
the modifier is amino acid type surfactant.
3. A reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 1, wherein:
the modifier is long-chain alkyl amino propionic acid.
4. The reverse osmosis/nanofiltration bactericide suitable for alkaline water bodies according to claim 1, which is characterized by comprising the following specific process steps:
s1, adding dipropylene glycol and 2, 2-dibromo-3-nitrilopropionamide in sequence, and mixing uniformly;
s2, adding an acid agent to adjust the pH value to be acidic;
s3, adding a modifier, and stirring for at least 30 min;
s4, adding an alkaline agent to adjust the pH value to be alkaline;
s5, adding the kasong and the BIT powder in sequence, and adding water to a constant volume;
s6, filtering to obtain the bactericide.
5. A reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 4, wherein:
the acid agent is added in an amount of 2-6 pH.
6. A reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 5, wherein:
the acid agent is an inorganic acid.
7. A reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 4, wherein:
the addition amount of the alkaline agent is that the pH value of the system is adjusted to 8-11.
8. A reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 4, wherein:
the alkaline agent is inorganic alkali.
9. A reverse osmosis/nanofiltration bactericide for use in alkaline waters according to claim 4, wherein:
the adding speed of each component medicament is 150-200 g/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656341.0A CN114375953A (en) | 2021-12-30 | 2021-12-30 | Reverse osmosis/nanofiltration bactericide suitable for alkaline water and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111656341.0A CN114375953A (en) | 2021-12-30 | 2021-12-30 | Reverse osmosis/nanofiltration bactericide suitable for alkaline water and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114375953A true CN114375953A (en) | 2022-04-22 |
Family
ID=81200766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111656341.0A Pending CN114375953A (en) | 2021-12-30 | 2021-12-30 | Reverse osmosis/nanofiltration bactericide suitable for alkaline water and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114375953A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007169222A (en) * | 2005-12-22 | 2007-07-05 | Katayama Chem Works Co Ltd | Industrial antibacterial agent and industrial antibacterial method using the same |
| CN104068028A (en) * | 2014-06-25 | 2014-10-01 | 国家海洋局天津海水淡化与综合利用研究所 | Composite bacteria and algae inhibitor and application thereof |
| CN109042691A (en) * | 2018-09-18 | 2018-12-21 | 山东日益环保科技有限公司 | A kind of reverse osmosis non oxidizing bactericide |
| CN112120028A (en) * | 2020-09-24 | 2020-12-25 | 新疆水处理工程技术研究中心有限公司 | Bactericide for reverse osmosis system and preparation method thereof |
| CN112568230A (en) * | 2020-12-22 | 2021-03-30 | 山东天庆科技发展有限公司 | Non-oxidizing bactericide for double-film method and preparation method thereof |
-
2021
- 2021-12-30 CN CN202111656341.0A patent/CN114375953A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007169222A (en) * | 2005-12-22 | 2007-07-05 | Katayama Chem Works Co Ltd | Industrial antibacterial agent and industrial antibacterial method using the same |
| CN104068028A (en) * | 2014-06-25 | 2014-10-01 | 国家海洋局天津海水淡化与综合利用研究所 | Composite bacteria and algae inhibitor and application thereof |
| CN109042691A (en) * | 2018-09-18 | 2018-12-21 | 山东日益环保科技有限公司 | A kind of reverse osmosis non oxidizing bactericide |
| CN112120028A (en) * | 2020-09-24 | 2020-12-25 | 新疆水处理工程技术研究中心有限公司 | Bactericide for reverse osmosis system and preparation method thereof |
| CN112568230A (en) * | 2020-12-22 | 2021-03-30 | 山东天庆科技发展有限公司 | Non-oxidizing bactericide for double-film method and preparation method thereof |
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Application publication date: 20220422 |