Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite slow-release solid scale inhibitor and preparation method thereof

A scale inhibitor and slow-release technology, which is applied in the field of composite slow-release solid scale inhibitor and its preparation, can solve the problems of restricted use, excessive TDS, etc., and achieves good safety, good scale inhibition effect, and good economical use. effect of value

Pending Publication Date: 2022-03-18
XIAMEN BAILIN WATER PURIFICATION TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when it is soaked in a hygienic and safe manner, it is easy to cause safety problems such as TDS exceeding the standard and white visible objects in the water.
In addition, polyphosphate scale inhibitors release excessive total phosphorus during use, which limits their use in drinking water and water purification industries

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
  • Composite slow-release solid scale inhibitor and preparation method thereof
  • Composite slow-release solid scale inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The present invention also provides a preparation method of a composite slow-release solid scale inhibitor, comprising the following steps:

[0027] S1. Dissolving calcium oxide in water and reacting for 2-4 hours, after filtering, a slaked lime solution is obtained.

[0028] Further, in a preferred embodiment of the present invention, the mass ratio of the calcium oxide to the water is 1:4-6, and the mesh used for the filtering is 340-360 mesh. Wherein, after calcium oxide is dissolved in water, it reacts while stirring at a stirring speed of 450-550 r / min. Preferably, the stirring speed is 500r / min.

[0029] S2. Mix the polycarboxylic acid copolymer, the citric acid and distilled water, stir for 20-40 minutes, and filter to obtain a mixed acid solution.

[0030] Further, in a preferred embodiment of the present invention, the stirring speed is 450-550 r / min. Preferably, the stirring speed is 500r / min. Under this stirring speed, the polycarboxylic acid copolymer an...

Embodiment 1

[0040] A composite slow-release solid scale inhibitor provided in this example is prepared according to the following method:

[0041] (1) Preparation of slow-release antiscalant: Dissolve 500g of calcium oxide powder in 2500g of pure water, fully react for 4 hours at a stirring speed of 500r / min, and then use a 350-mesh sieve to filter out impurities to obtain a slaked lime solution. Then, 500 g of acrylic acid-itaconic acid white solid, 1500 g of citric acid crystals and distilled water were continuously stirred at a stirring speed of 500 r / min for 30 min to obtain a mixed acid solution. Finally, add slaked lime solution into the reaction kettle, and use a metering pump to add mixed acid solution into the reaction kettle while stirring at a speed of 900r / min. Recrystallize after reacting for 8 hours to obtain a slow-release solid scale inhibitor, which is dried and crushed for later use. .

[0042] (2) Preparation of composite slow-release solid scale inhibitor: Take 560g s...

Embodiment 2

[0044] This example provides a composite slow-release solid scale inhibitor, which is prepared according to the following method:

[0045] (1) Preparation of slow-release antiscalant: Dissolve 500g of calcium oxide powder in 2500g of pure water, fully react for 4 hours at a stirring speed of 500r / min, and then use a 350-mesh sieve to filter out impurities to obtain a slaked lime solution. Then, 500 g of acrylic acid-itaconic acid white solid, 1500 g of citric acid crystals and distilled water were continuously stirred at a stirring speed of 500 r / min for 30 min to obtain a mixed acid solution. Finally, add slaked lime solution into the reaction kettle, and use a metering pump to add mixed acid solution into the reaction kettle while stirring at a speed of 900r / min. Recrystallize after reacting for 8 hours to obtain a slow-release solid scale inhibitor, which is dried and crushed for later use. .

[0046] (2) Preparation of composite slow-release solid scale inhibitor: Take 50...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a composite slow-release solid scale inhibitor and a preparation method thereof, and the composite slow-release solid scale inhibitor comprises the following components by mass percentage: 20%-75% of a slow-release scale inhibitor, 0.5%-10% of an adhesive, 10%-60% of a structural adhesive, and 10%-50% of a filler and a solvent. And the mass of the solvent is 10-50% of the sum of the mass of the slow-release scale inhibitor, the adhesive, the structural adhesive and the filler. Wherein the slow-release scale inhibitor is obtained by reacting a mixed acid and calcium hydroxide, and the mixed acid comprises a polycarboxylic acid copolymer and citric acid. Different mixed acids can be obtained by adjusting the type of the polycarboxylic acid copolymer and the ratio of the polycarboxylic acid copolymer to the citric acid, and the slow-release scale inhibitor with a good scale inhibition effect can be obtained by reacting the mixed acids with the calcium hydroxide. On the other hand, the composite slow-release solid scale inhibitor with controllable release speed can be prepared by adjusting the ratio of the slow-release scale inhibitor to the structural adhesive. The composite slow-release solid scale inhibitor is good in scale inhibition effect, long in service life and low in cost. In addition, after the composite slow-release solid scale inhibitor is soaked in water, the release amount of TDS and total phosphorus is low, and the safety is good.

Description

technical field [0001] The invention relates to the technical field of scale inhibitors, and in particular to a composite slow-release solid scale inhibitor and a preparation method thereof. Background technique [0002] The descaling methods for drinking water mainly include physical and chemical methods, such as ion exchange technology, membrane separation technology, molecular sieve adsorption technology, etc. Among them, ion exchange technology is a mature traditional process, but its resin is easily polluted and oxidized, leading to failure, frequent regeneration, and replacement of sodium ions. Therefore, the water treated by this technology is not suitable for long-term drinking. Common membrane separation technologies include nanofiltration membrane technology and reverse osmosis membrane technology. These two membrane separation technologies have obvious and stable effects. However, in the separation process, there is a high requirement for the inlet water pressur...

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
IPC IPC(8): C02F5/10C02F5/08
CPCC02F5/105
Inventor 秦黎明于爽严建勇
Owner XIAMEN BAILIN WATER PURIFICATION TECH CO LTD
Features
  • Generate Ideas
  • 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