US6372806B1

 

Disclosed are stable aqueous colloidal silicas having surface area of greater than 700 m 2 g and S values of from 50 These colloidal silicas do not require treatment with surface treatment agents such as aluminum to achieve stability These colloidal silica aquasols can be produced and stored at concentrations of greater than 7 percent by weight SiO 2 solids and even as high as 15 …

US2799658A

 

US2799658A US285789A US28578952A US2799658A US 2799658 A US2799658 A US 2799658A US 285789 A US285789 A US 285789A US 28578952 A US28578952 A US 28578952A US 2799658 A US2799658 A US 2799658A Authority US United States Prior art keywords colloidal silica gelatin silica precipitate water Prior art date 02 Legal status The legal status is an assumption and is not …

Pentair

 

Pentair Silica removal package The Silica Removal Package SRP offers the best protection for boilers and turbines By removing colloidal silica gt 99 8 from the surface feedwater it limits equipment failure maximizes uptime of power generators and increases overall operational efficiency …

Dialysis process for the removal of surfactants to form

 

Colloidal mesoporous silica nanoparticles less than 20 nm in diameter are prepared by dialysis this simple surfactant removal route can avoid aggregation by sedimentation–redispersion and remove cationic surfactants while retaining the original colloidal state which is applicable to the preparation of primary nanoparticles carrying a functional organic substance …

Measuring and removing dissolved and colloidal silica

 

ensp 0183 ensp title quot Measuring and removing dissolved and colloidal silica in ultrapure water quot abstract quot This paper presents a promising new technique for ultrapure water systems that combines ultraviolet radiation and ozone to remove colloidal silica by converting it into dissolved silica …

Measurement and removal of dissolved colloidal silica

 

T1 Measurement and removal of dissolved colloidal silica in ultrapure water AU Wibowo J AU Shadman Farhang AU Bleckford D PY 1997 Y1 1997 N2 As the worldwide manufacture of semiconductors continues to grow the semiconductor industry needs increasing amounts of …

Functionality for Levasil Colloidal Silica

 

Levasil Colloidal Silica aqueous dispersions are available in a variety of grades determined by particle size structure concentration pH surface charge and surface modification It is a versatile inorganic material also known as silica sol that can be used for many different industrial functions …

LUDOX Colloidal Silica

 

12 ensp 0183 ensp LUDOX 174 colloidal silica contains discrete spherical parti cles of amorphous silica in the low nanometer size range The particles are dispersed in water are non porous and exhibit no detectable crystallinity LUDOX 174 colloidal silica is especially useful in applications requiring chemical inertness and heat resistance in the final product …

Colloidal silica removal in coagulation processes for

 

Colloidal silica removal in coagulation processes for wastewater reuse in a high tech industrial park Article in Water Science amp Technology 55 2 95 183 February 2007 with 605 Reads…

Silica removal from water

 

2002 A Silica can be removed from raw water easily with standard demineralization techniques Normally silica is present in a weak acidic form Ion exchange will remove this as long as the anion resin is the strong base type Silica in deionized water can easily be reduced to 50 ppb …

Silica Scaling Removal Process

 

31 ensp 0183 ensp facilities based in silica rich regions including the Western United States Scientists at Los Alamos National Laboratory have developed a novel technology to remove both dissolved and colloidal silica using small gel particles These innovative gel particles remove both types of silica from slip streams or sidestreams of cooling tower…

Silica SiO2

 

Silica silicon dioxide in some cases is an anion The chemistry of silica is a complex and somewhat unpredictable subject In similar fashion as TOC reports the total concentration of organics as carbon without detailing what the organic compounds are silica reports the total concentration of silicon as silica without detailing what the silicon compounds are …

Pentair

 

Silica can be present either in dissolved form reactive silica or in particulate form colloidal silica Ion exchange will not remove colloidal silica RO will foul with colloidal silica Therefor removal of colloidal silica is critical in high purity applications …

Colloidal Silica Polishing Suspension

 

Final polishing suspensions are designed to remove the final layer of surface deformation and prepare a sample for analysis Deformities may not be visible to the naked eye but must be removed for some specimen analysis techniques …

An innovative economical and efficient method of

 

The removal of contaminants such as silica from water can be a challenging proposition Some examples of industries that need to remove silica from the water before discharge or reuse are cooling towers boiler blow feed water or boiler blow down water carwashes semi conductor manufacturers and steam injection oil recovery wastewater …

Colloidal silica removal in coagulation processes for

 

Four experiments of coagulation and flocculation were conducted to investigate the characteristics of colloidal silica removal in a high tech industrial wastewater treatment plant for reclamation …

Ordered Mesoporous Polymers of Tunable Pore Size

 

Ordered mesoporous polymers have been prepared by replication of colloidal crystals made from silica spheres 35 nanometers in diameter The pores in the colloidal crystals were filled with divinylbenzene DVB ethyleneglycol dimethacrylate EDMA or a mixture of the two Polymerization and subsequent dissolution of the silica template leaves a polycrystalline network of interconnected pores …

LUDOX SK Colloidal Silica

 

12 ensp 0183 ensp LUDOX 174 SK Colloidal Silica Unique Enhanced Water Based Binders for Rapid Processing of Investment Castings Table of Contents What are LUDOX 174 SK Binders 2 LUDOX 174 SK Grades for Face and Backup Coats LUDOX 174 SK Colloidal Silica – Key Advantages Benefits of LUDOX 174 SK Colloidal Silica LUDOX 174 SK Binders are different 3 Rapid Shell Processing with…

Silica colloidal Sigma Aldrich

 

Sigma Aldrich offers a number of Silica colloidal products View information amp documentation regarding Silica colloidal including CAS MSDS amp more …

Colloidal Silica Suspensions

 

The 0 02 micron colloidal silica formula provides ultra fine surface finishes for demanding SEM TEM analysis It is non crystallizing and has a 9 8 pH The 0 05 micron colloidal silica formula is an excellent final polish for a wide variety of materials especially non ferrous metals PCBs and ICs It is non crystallizing and has a 9 8 pH …

Polydisperse spherical colloidal silica particles

 

28 ensp 0183 ensp Chin Phys B Vol 25 No 11 2016 118202 abrasives in the CMP slurries 1 0 wt NaOH solution was used to adjust the pH values of all colloidal silica based slur ries to be about 10 35 DI water was used to dilute silica…

How could we remove colloidal silica used in

 

How could we remove colloidal silica used in preparation of nano particles We know that silica can be etched out using HF but it can modify or change the nano particles we are interested in …

Bulk handling

 

When installing tanks and equipment for colloidal silica it is important to avoid trapping product in low points in pipes and tanks to reduce the risk of organic growth If allowed to dry colloidal silica can also form silica deposits that are very difficult to remove Dried silica solids can result in …

SDI Reduction Plants

 

Hence to counter the problem we have introduced water and waste water treatment plants that are designed and developed to effectively treat the water for SDI reduction and Colloidal Silica removal besides the normal filtration activities as carried out by the plants …

A novel cleaner for colloidal silica abrasive removal in post

 

A novel cleaning solution named FA O alkaline cleaner was proposed and demonstrated in the removal of colloidal silica abrasives In order to remove both the chemical and physical absorbed colloidal silica abrasives an FA OII chelating agent and non…

ULTRAFILTRATION FOR COLLOIDAL SILICA REMOVAL

 

25 ensp 0183 ensp Ultrafiltration system can be economically used to remove colloidal silica and thereby preventing damage of turbine blades The Ultrafiltration system also provides additional advantages such as Removal of other colloidal particles like colloidal iron and biological slimes which are quite high in rainy season Ease of operation …

 

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