Scale inhibitor of reverse osmosis membranes

A technology of reverse osmosis membrane and scale inhibitor, which is applied in the field of reverse osmosis membrane scale inhibitor, can solve the problems of general effect, high cost and large usage of scale inhibitor, so as to reduce the hidden danger of biological pollution and bacteria exceeding the standard, and achieve satisfactory results. The effect of comprehensive detergency performance and improved use effect

Inactive Publication Date: 2016-11-16
ANHUI SONGTAI PACKAGING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, organic phosphoric acid reverse osmosis membrane antiscalants have developed extremely rapidly. They can be used in a wide pH range of feed water, and have good stability to calcium ion concentration, alkalinity, and metal ions such as iron and manganese. , can effectively control CaCO 3 , CaSO 4 , BaSO 4 , SrSO 4 The formation of other scales, but phosphorus is a nutrient source for bacteria and algae, and phosphorus-containing antiscalants will provide the bacteria and microor...

Method used

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  • Scale inhibitor of reverse osmosis membranes
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  • Scale inhibitor of reverse osmosis membranes

Examples

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Embodiment 1

[0016] Embodiment 1: a kind of antiscalant of reverse osmosis membrane, described antiscalant contains following components:

[0017]

[0018] Wherein, the polylactic acid has a molecular weight of 8000, and the polyaspartic acid has a molecular weight of 4500.

[0019] A preparation method of a reverse osmosis membrane antiscalant, comprising the steps of: 2 / 3 deionized water, polyepoxysuccinic acid, sodium polystyrene sulfonate, polyaspartic acid, polylactic acid, benziso Add thiazolinone, dioctadecyldimethylammonium bromide and the remaining deionized water in sequence and corresponding proportions into the container at room temperature, and stir until a uniform transparent solution is obtained, which is the reverse osmosis membrane scale inhibitor.

Embodiment 2

[0020] Embodiment 2: a kind of antiscalant of reverse osmosis membrane, described antiscalant contains following components:

[0021]

[0022] Wherein, the polylactic acid has a molecular weight of 10,000, and the polyaspartic acid has a molecular weight of 5,000.

[0023] A preparation method of a reverse osmosis membrane antiscalant, comprising the steps of: 2 / 3 deionized water, polyepoxysuccinic acid, sodium polystyrene sulfonate, polyaspartic acid, polylactic acid, benziso Add thiazolinone, dioctadecyldimethylammonium bromide and the remaining deionized water in sequence and corresponding proportions into the container at room temperature, and stir until a uniform transparent solution is obtained, which is the reverse osmosis membrane scale inhibitor.

Embodiment 3

[0024] Embodiment 3: a kind of antiscalant of reverse osmosis membrane, described antiscalant contains following components:

[0025]

[0026] Wherein, the molecular weight of polylactic acid is 3000, and the molecular weight of polyaspartic acid is 4000.

[0027] A preparation method of a reverse osmosis membrane antiscalant, comprising the steps of: 2 / 3 deionized water, polyepoxysuccinic acid, sodium polystyrene sulfonate, polyaspartic acid, polylactic acid, benziso Add thiazolinone, dioctadecyldimethylammonium bromide and the remaining deionized water in sequence and corresponding proportions into the container at room temperature, and stir until a uniform transparent solution is obtained, which is the reverse osmosis membrane scale inhibitor.

[0028] The invention provides a reverse osmosis membrane phosphorus-free scale inhibitor that can efficiently remove inorganic scale and colloidal scale deposited on the reverse osmosis membrane. The synergistic effect between r...

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Abstract

The invention discloses a scale inhibitor of reverse osmosis membranes and relates to the field of chemical processes. The composition is prepared from polyepoxysuccinic acid, sodium polystyrene sulfonate, poly aspartic acid, polylactic acid, dimethyldistearylammonium bromide, benzisothiazolones and deionized water. The phosphate-free scale inhibitor of reverse osmosis membranes is capable of efficiently removing inorganic scales and colloid scales deposited on reverse osmosis membranes; in the formula, several phosphate-free or low-phosphate environment-friendly materials are used in combination, the use effect of the composite agent is greatly improved through the synergistic effect among the raw materials, and satisfactory comprehensive scale removing performance is achieved; meanwhile, by means of the phosphate-free formula and addition of a small amount of the green fungicide benzisothiazolones, the potential danger of biological pollution and bacterium standard exceeding of membrane systems can be relieved, and pollution to the environment water source is avoided.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a reverse osmosis membrane scale inhibitor. Background technique [0002] The large-scale application of membrane separation technology began in the seawater desalination project in the 1960s. The reverse osmosis method has the advantages of small footprint, low operating cost, no secondary pollution, stable water output, and high degree of automation. The technical field has gradually replaced the ion exchange method and has become the main technology for pure water preparation. At present, it is not only used in large-scale desalination of seawater, brackish water, pure water, ultrapure water production, and sewage reuse, but also used in the food industry. , pharmaceutical industry, bioengineering and other fields. Reverse osmosis technology is a reverse osmosis process that applies external driving force to salt water to overcome the osmotic pressure so that water molecule...

Claims

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Application Information

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IPC IPC(8): B01D65/08C02F1/44C02F5/10C02F5/12
CPCB01D65/08C02F1/441C02F5/10C02F5/12
Inventor 焦国平齐继业方兴旺
Owner ANHUI SONGTAI PACKAGING MATERIALS
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