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Preparation method of scale inhibitor for reverse osmosis membrane

The technology of reverse osmosis membrane and scale inhibitor is applied in the field of preparation of scale inhibitor for reverse osmosis membrane. Period, good anti-scaling performance, the effect of solving the problem of particle deposition

Inactive Publication Date: 2016-07-13
TIANJIN KAKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This agent has obvious defects: easy to decompose, poor effect of dispersion and scale inhibition
They control the precipitation process by retarding and distorting the growth of salt crystals, distorting the crystals as they form and preventing the formation of dense crystals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select raw materials by weight percentage

[0021] Organic phosphonic acid 10%

[0022] Polyacrylic acid 10%

[0023] Polyaspartic acid 5%

[0024] Cyclohexylamine 15%

[0025] Organosulfur compounds 5%

[0026] Deionized water balance

[0027] Mix organic phosphine carboxylic acid, polyacrylic acid, and polyaspartic acid in proportion and add them sequentially. When heated to 50°C, add cyclohexylamine dropwise, potassium isothiocyanate and deionized water, and stir for about 1 hour. Allow to cool to room temperature.

Embodiment 2

[0029] Select raw materials by weight percentage

[0030] Organic phosphonic acid 20%

[0031] Polyacrylic acid 30%

[0032] Polyaspartic acid 15%

[0033] Cyclohexylamine 25%

[0034] Organosulfur compounds 10%

[0035] Deionized water balance

[0036] Mix organic phosphine carboxylic acid, polyacrylic acid, and polyaspartic acid in proportion and add them sequentially. When heated to 50°C, add cyclohexylamine dropwise, add sodium isothiocyanate and deionized water, and stir for about 1 hour. Allow to cool to room temperature.

Embodiment 3

[0038] Select raw materials by weight percentage

[0039] Organic phosphonic acid 20%

[0040] Polyacrylic acid 30%

[0041] Polyaspartic acid 15%

[0042] Cyclohexylamine 25%

[0043] Organosulfur compounds 10%

[0044] Deionized water balance

[0045] Mix organic phosphine carboxylic acid, polyacrylic acid, and polyaspartic acid in proportion and add them sequentially. When heated to 50°C, add cyclohexylamine dropwise, diallyl thiosulfonate and deionized water, and react with stirring. About 1 hour, let cool to room temperature.

[0046] Application Test and Results

[0047] At present, there are many kinds of antiscalants for reverse osmosis membranes in the market. We selected representative PT0100 from American company A and FLOCON135 from British company B to compare the antiscalant properties of calcium carbonate and calcium sulfate.

[0048] 1. Source of test samples

[0049] see table 1

[0050] Company Name

Drug name

Product of the prese...

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PUM

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Abstract

The invention relates to a preparation method of a scale inhibitor for a reverse osmosis membrane.The preparation method is characterized by comprising: proportionally mixing and adding organic phosphoric carboxylic acid, polyacrylic acid, polyaspartic acid, cyclohexylamine, a nitro compound and deionized water in succession, heating to 50 DEG C, dropwise adding cyclohexylamine, charging the nitro compound and deionized water, reacting and stirring for about 1 h, and cooling to room temperature to obtain a product.The product has a molecular weight range of 1500 to 4000, and addition of the product in actual water treatment of the reverse osmosis membrane is 3-10 ppm.

Description

technical field [0001] The invention relates to the technical field of water treatment, and relates to a method for preparing a scale inhibitor for reverse osmosis membranes. The technical focus of the invention is to solve the problem of the deposition of granular substances on the reverse osmosis membrane. Background technique [0002] At present, reverse osmosis technology has become more and more popular, and it is more and more used in sewage reuse, seawater desalination, food, chemical and other industries. The reverse osmosis influent water sources are mainly collected from surface water, groundwater and reclaimed water. These water sources contain a large amount of suspended solids and colloids, but pretreatments such as coagulation clarification and multi-media filters cannot eliminate fine sand particles and iron corrosion in the water. The sediment, hardness sediment, inorganic and organic colloids, etc. are completely removed, which will inevitably cause fouling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08
CPCB01D65/08B01D2321/16
Inventor 王青青
Owner TIANJIN KAKE TECH CO LTD
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