Unlock instant, AI-driven research and patent intelligence for your innovation.

Cleaning agent composition and cleaning method for reverse osmosis membrane

A technology of composition and cleaning agent, applied in the direction of chemical instruments and methods, semipermeable membrane separation, membrane technology, etc., can solve problems such as cleaning schemes not mentioned, reduce dosage and rinsing time, reduce bacterial content, and enhance washing sexual effect

Active Publication Date: 2015-03-11
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US5499197 discloses an automatic control scheme for a reverse osmosis system. This reverse osmosis system is used to produce drinking water. Various indicators of the produced water are monitored through the automatic control system. The alarm indicates that the RO system needs to be cleaned and can stop the RO system itself if it is not cleaned effectively, but does not mention the specific cleaning method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cleaning agent composition and cleaning method for reverse osmosis membrane
  • Cleaning agent composition and cleaning method for reverse osmosis membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This example is used to illustrate the cleaning composition of the present invention and the cleaning method of the reverse osmosis membrane.

[0044] Weigh 1 kg of sodium dodecylbenzenesulfonate (purchased from Nanjing Suru Chemical Co., Ltd.), 5 g of glutaraldehyde (purchased from Wuhan Organic Xinkang Chemical Co., Ltd.), acrylic acid / hydroxypropyl acrylate / 2-acrylamide- 2-Methylpropylsulfonic acid copolymer (purchased from Taihe Water Treatment Co., Ltd., Shandong Province, brand TH-613) 3.5g, add 70kg deionized water, stir to make it fully dissolve, add deionized water to the solution weight of 100kg, and adjust the pH value to 11.0 with NaOH to obtain cleaning solution L1.

[0045] according to figure 1 In the process shown, a two-stage two-stage reverse osmosis system is used to treat the raw water whose water quality parameters are shown in Table 1. The water treatment capacity is 200L / h until the pressure difference between the front and back of the first-stag...

Embodiment 2

[0059] This example is used to illustrate the cleaning composition of the present invention and the cleaning method of the reverse osmosis membrane.

[0060] Weigh 2.7kg of sodium dodecylbenzenesulfonate (purchased from Nanjing Suru Chemical Co., Ltd.), 9.5g of 2,2-dibromo-3-nitrilopropionamide (purchased from Dongying Juqiang Fine Chemical Co., Ltd.) , acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropylsulfonic acid copolymer (purchased from Taihe Water Treatment Co., Ltd., Shandong Province, trade mark TH-613) 5.8g, add 70kg deionized water, stir to make It was fully dissolved, and deionized water was added until the weight of the solution was 100 kg, and the pH value was adjusted to 11.2 with KOH to obtain cleaning solution L2.

[0061] The reverse osmosis membrane in the two-stage two-stage reverse osmosis system was cleaned according to the method of Example 1, except that the cleaning solution L1 used in Example 1 was replaced with cleaning solution L2.

Embodiment 3

[0063] This example is used to illustrate the cleaning composition of the present invention and the cleaning method of the reverse osmosis membrane.

[0064]Weigh 1.3 kg of sodium dodecylbenzenesulfonate (purchased from Nanjing Suru Chemical Co., Ltd.), 1-bromo-3-chloro-5,5-dimethylhydantoin (purchased from Shanghai Zhixin Chemical Co., Ltd. Co., Ltd.) 5.9g, acrylic acid / hydroxypropyl acrylate / 2-acrylamide-2-methylpropylsulfonic acid copolymer (purchased from Shandong Taihe Water Treatment Co., Ltd., brand TH-613) 3.9g, add 70kg to Deionized water, stirred to make it fully dissolved, added deionized water until the weight of the solution was 100kg, and adjusted the pH value to 11.4 with NaOH to obtain cleaning solution L3.

[0065] The reverse osmosis membrane in the two-stage two-stage reverse osmosis system was cleaned according to the method of Example 1, except that the cleaning solution L1 used in Example 1 was replaced with cleaning solution L3.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a cleaning agent composition, comprising an anionic surfactant, a dispersing agent and a sterilizing agent, wherein the anionic surfactant is C8-C16 alkylbenzene sulfonate; the dispersing agent is a (methyl)acrylic homopolymer and / or a (methyl)acrylic acid copolymer; and the sterilizing agent is a non-oxidizing sterilizing agent. The invention also relates to a method for cleaning a reverse osmosis membrane by using the above cleaning agent composition. The method comprises the steps of preparing the cleaning agent composition into a cleaning liquid with a pH value of 10.5-11.5 and cleaning the reverse osmosis membrane by using the cleaning liquid. The cleaning liquid prepared by the cleaning agent composition can clean the reverse osmosis membrane effectively, makes water yield of a reverse osmosis system restore basically, and can significantly reduce front-and-back pressure difference of the reverse osmosis membrane and reduce conductivity of produced water.

Description

technical field [0001] The invention relates to a cleaning agent composition and a method for cleaning a reverse osmosis membrane by using the cleaning agent composition. Background technique [0002] With global water pollution and water scarcity, water treatment equipment - reverse osmosis desalination device (RO) has developed rapidly since the first high-performance membrane was made in the United States in the late 1950s. my country first adopted reverse osmosis desalination devices in the late 1970s, but it was not until 1993 that TFC-HR high desalination new membranes appeared that great development was achieved. Reverse osmosis is a membrane separation technology driven by pressure difference with the help of the function of selective permeable membrane. When the pressure applied to the system is greater than the osmotic pressure of the solution, water molecules pass through the membrane and enter the central tube through the water flow channel. Flow out at one end....

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06
Inventor 王亭齐海英张宇婷郦和生
Owner CHINA PETROLEUM & CHEM CORP
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com