Reverse osmosis membrane scale inhibitor and preparation and use method thereof

A technology of reverse osmosis membrane and scale inhibitor, which is applied in the field of water treatment chemicals, can solve the problems such as the formation of deposits on the surface of reverse osmosis membrane, and achieve the effect of good scale inhibition effect, environmental friendliness and low cost.

Active Publication Date: 2009-05-06
CHINA PETROLEUM & CHEM CORP +1
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AI-Extracted Technical Summary

Problems solved by technology

[0008] In order to solve the problem of deposits on the surface of the reverse osmosis membrane during the reverse osmosis treatment process, and at the same time adapt to the use environment where the biochemical treatment ...
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Abstract

The invention discloses a reverse osmosis membrane scale inhibitor, and a method for preparing and using the same. The reverse osmosis membrane scale inhibitor contains polymeric scale inhibitors and components selected from phosphono-carboxylic acid scale inhibitors, organic phosphonic acid scale inhibitors and auxiliary agents. The reverse osmosis membrane scale inhibitor is high in scale inhibition efficiency, small in addition, environmental-friendly, and is suitable to be used in environments with organic substances and in a reverse osmosis membrane treatment process for recycling sewage. For wastewater effluents from a biochemical treatment process with a chemical oxygen demand (COD) less than 150mg/l, the reverse osmosis membrane scale inhibitor has good scale inhibition effect on CaCO3, CaCO4, BaSO4, SrSO4 and so on, and can ensure the normal operation of a membrane component and prolong the service life of the membrane component.

Application Domain

Technology Topic

SewageChemical oxygen demand +2

Examples

  • Experimental program(1)
  • Effect test(1)

Example

[0028] Examples 1-10
[0029] Component and preparation method of scale inhibitor:
[0030] The scale inhibitor is prepared in a four-necked flask equipped with a heating device, a reflux device, a stirring device and a temperature indicating device.
[0031] In a four-necked flask, add various scale inhibitors and additives in proportion. After the solid materials are completely dissolved, heat to a certain temperature and maintain for a certain time, stop heating, adjust the solid content with water, and cool to normal temperature to obtain the Invented scale inhibitor.
[0032] The scale inhibitor components and preparation conditions of Examples 1-10 are shown in Table 1.
[0033] Table 1
[0034] Real
[0035]
[0036] (The content in the table is percentage by weight.)
[0037] Among them: BC-648 is a terpolymer of acrylic acid, methyl acrylate and propylene sulfonic acid, BC-647 is a copolymer of sulfonated styrene and maleic acid, PASP is an aspartic acid polymer, and XH-929 is a copolymer containing Phosphoacrylamide and acrylic acid copolymer, PESA is polyepoxysuccinic acid; PHA is acetic acid phosphonic acid, HEDP is hydroxyethylidene diphosphonic acid, PBTC is 1,2,4-tricarboxyl, 2-phosphonobutane; PAPEMP is polyamino polyether methylene phosphonic acid, ATMP is amino trimethylene phosphonic acid, EDTMP is ethylene diamine tetramethylene phosphonic acid.
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PUM

PropertyMeasurementUnit
Concentration240.0mg/l
Concentration200.0mg/l
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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