Method for the removing and reducing scaling

A technology of scaling, trimethylglycine, applied in chemical instruments and methods, descaling and water softening, special treatment targets, etc., can solve problems such as high cost, reduced use time, membrane damage, etc., to improve anti-scaling ability , the effect of eliminating accumulation

Active Publication Date: 2015-03-11
NALCO CO
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Problems solved by technology

The traditional method of controlling scaling involving calcium phosphate is the addition of acid, which is very effective but has some disadvantages, firstly, it can be detrimental to the membrane or reduce the time of use before it needs to be replaced, secondly, it is costly for large systems Too high, and finally, there are safety concerns associated with using acid in high-flow, high-pressure acid feed systems

Method used

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  • Method for the removing and reducing scaling
  • Method for the removing and reducing scaling

Examples

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Embodiment

[0020] The foregoing may be better understood by reference to the following examples, the purpose of which is to illustrate the method for practicing the invention and not to limit the scope of the invention. This experiment was performed at 25 °C and an induction period of 45 min. The procedure involves using 130ml of deionized water in a Erlenmeyer flask equipped with a stir bar, adding 2 HPO 4 (0.016ml) and 0.1M CaCl 2 (40.0ml) standard solution of ions. If evaluating antiscalants, add antiscalants at this step by adding an appropriate volume of deionized water to the test to keep all total volumes the same and thus maintain the same concentration of ions. Turbidity was then measured using a hand-held turbidimeter (return the portion taken for measurement back into the mother liquor) and pH was measured using a VWRSymphony pH meter. After 45 minutes, the turbidity and pH were measured again, followed by the addition of 0.1M Na 2 HPO 4 . Finally, the above steps were ...

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Abstract

The invention relates to improved elimination of scale in processing systems. The method removes existing scale while also eliminating buildup. The invention relates to phosphate and sulfate scale. The invention further allows for improved anti-scaling without the need to make any pH adjustments. The method provides all factor listed while in no way compromises the integrity of membranes that may be used in the system.

Description

[0001] Copyright Notice [0002] Portions of the disclosure of this patent document contain or may contain copyrighted material. The copyright owner has no objection to the photocopying by anyone of this patent document or the patent disclosure, in the exact form as it appears in the Patent and Trademark Office files or files, but otherwise reserves all copyright rights whatsoever. technical field [0003] The present invention relates to improved elimination of calcium phosphate scale in treatment systems. The present invention also contemplates improved scale control so that there is no accumulation in the system when the pH is not adjusted. Furthermore, the present invention in no way compromises the integrity of the membrane when used in a system. Background technique [0004] Calcium phosphate fouling is a growing concern in numerous industries, but is most important in industries that use membranes for purification and filtration. Due to new municipal applications a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/06B01D65/08
CPCC02F2101/101C02F2101/105C02F5/125C02F2303/20C02F2303/22C02F5/12B01D65/06B01D65/08
Inventor 威廉·H·莫里斯三世
Owner NALCO CO
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