No.169, Science (Kexue) Avenue,National HI-TECH Industry Development Zone, Zhengzhou, China
[email protected]
0086-371-86549132
No.169, Science (Kexue) Avenue,National HI-TECH Industry Development Zone, Zhengzhou, China
[email protected]
0086-371-86549132
A process to manufacture in laboratory andor industrial scale lubricant greases using hydrophilic or hydrophobic silicon bioxide fumed silica with a surface area in the range of 120 to 300 m.sup.2 g, or ground precipitated silicic acid which is mixed and dispersed in an adequate and proportional manner with liquid or solid additives and with either pure paraffinic or naphthenic, heavy or ...
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Process for the production of precipitated silica from olivine including the following steps: providing olivine particles with a particle size preferably below 1 mm in diameter, preferably mixing...
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Process for the production of precipitated silica from olivine including the following steps: providing olivine particles with a particle size preferably below 1 mm in diameter, preferably mixing olivine and water to form an olivine/water slurry, mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a Concentration at 18 wt % or above, and at a temperature preferably ...
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Process for the production of precipitated silica from olivine including the following steps:—providing olivine particles with a particle size preferably below 1 mm in diameter,—preferably mixing...
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22.10.2009 Process for the production of precipitated silica from olivine including the following steps:—providing olivine particles with a particle size preferably below 1 mm in diameter,—preferably mixing olivine and water to form an olivine/water slurry,—mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a concentration at 18 wt % or above, and at a temperature preferably
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Process for the production of precipitated silica from olivine including the following steps: providing olivine particles with a particle size preferably below 1 mm in diameter, preferably mixing olivine and water to form an olivine/water slurry, mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a Concentration at 18 wt % or above, and at a temperature preferably ...
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22.10.2009 Process for the production of precipitated silica from olivine including the following steps:—providing olivine particles with a particle size preferably below 1 mm in diameter,—preferably mixing olivine and water to form an olivine/water slurry,—mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a concentration at 18 wt % or above, and at a temperature preferably
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14.07.1998 FIG. 1 of the drawing is a process diagram illustrating a method for manufacturing chemically precipitated silica by treating olivine with acid. The process is designed in order to give the silica the best possible quality. The diagram illustrates the main principle involved in the manufacture of silica and magnesium products on the basis of olivine and hydrochloric acid, but other mineral acids
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Amorphous precipitated silica was successfully extracted from naturally occurring olivine reacted with a mixture of NaOH, KOH, and H 2 O, and the product demonstrated the chemical and physical properties required for industrial applications (surface area of 670.8 m 2 g −1, particle size below 10 nm, and high thermal stability).
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olivine silica production process, experimental setup and first results and further research. 1.1 Production of nano-silica At present a wide range of silica products is manufactured industrially for a diverse array of applications. Silicas are mainly used for reinforcing, thickening and flattening purposes. In 1999 the world precipitated silica production capacity was 1100 kilotons [3]. There ...
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The precipitated silica is then filtered off, washed, dried and milled using a pendulum roller mill or a jet mill. Because of their abrasiveness, the precipitated silicas can be employed as cleansing and abrasive agents and, in the case of the jet-milled product, also as a polishing agent, abrasive and thickener in toothpastes. US4857289A - Process for preparing precipitated silica - Google ...
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The process consists of three steps: (1) dissolution of olivine; (2) precipitation of magnesite and (3) precipitation of silica. Separation and precipitation of the reaction products do not require chemical additives, such as acids or bases, and there will thus be few requirements of chemical reclamation.
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are manufactured industrially for a diverse array of ap- plications. Silicas are mainly used for reinforcing, thick- ening and flattening purposes. World demand for spe- cialty silicas, which include precipitated silica, fumed silica, silica gel and silica sol, will rise 6.3 percent per year to 2.7 million metric tons in 2014 [1]. There are two main routes for the productions of syn- thetic ...
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we manufacture very highly porous precipitated silicas with improved rigidity to withstand the high shear forces generated during paint manufacturing. Available as wax-treated and non-treated products, Lo-Vel flatting agents are suitable for a wide range of coatings film thicknesses. Wax-treated flatting agents improve dispersion stability and anti-settling behavior in mostly polar solvent and ...
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The separation and washing of the olivine nano-silica increases the specific surface area and the pore volume. Washing does not affect the texture of the silica, but removes the magnesium sulfate from the pores. Therefore, the washing of olivine nano-silica can be con-sidered as the extraction of magnesium sulfate from the porous system. Lieftink [5] reported that seven washing steps of 100 ml
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Process for the production of precipitated silica from olivine including the following steps: providing olivine particles with a particle size preferably below 1 mm in diameter, preferably mixing olivine and water to form an olivine/water slurry, mixing the olivine/water slurry with hydrochloric acid (HCl), preferably at a Concentration at 18 wt % or above, and at a temperature preferably ...
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olivine silica production process, experimental setup and first results and further research. 1.1 Production of nano-silica At present a wide range of silica products is manufactured industrially for a diverse array of applications. Silicas are mainly used for reinforcing, thickening and flattening purposes. In 1999 the world precipitated silica production capacity was 1100 kilotons [3]. There ...
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Process for production of precipitated silica from olivine: October, 2009: Gunnarsson et al. Primary Examiner: RUMP, RICHARD M . Attorney, Agent or Firm: J M HUBER CORPORATION (Minneapolis, MN, US) Claims: What is claimed is: 1. A method of providing a precipitated silica particulate composition, said method comprising the sequential steps of: a) providing a plurality of precipitated silica ...
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Schematic process flowsheet of the Olivine Process . 5 process steps to the sustainable production of precipitated nano silica . Commercial Olivine nano-silica . Olivine nanosilica of high purity . SELOR. eeig. Levi, Finland 23 – 25 April 2013 . Lab scale nanosilica optimisation . Reduction of SSA by up to75%, by hydrothermal treatment of nS . 15 litre reaction vessel used for experiments ...
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01.02.2009 The process consists of three steps: (1) dissolution of olivine; (2) precipitation of magnesite and (3) precipitation of silica. Separation and precipitation of the reaction products do not require chemical additives, such as acids or bases, and there will thus be few requirements of chemical reclamation. A semi-continuous set of laboratory-scale experiments including process steps 1 and 2 ...
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The olivine dissolution process is a convenient alternative to the traditional methods of nano-silica production; and that is because the low energy requirement makes it possible to use this ...
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15.11.2012 3. Process yield of the olivine nano-silica. The process yield, Y NS, is defined as the rate between the nano-silica produced experimentally, NS_ exp, and the potential nano-silica present in the olivine calculated theoretically, NS_ th1, (2) Y NS (%) = m NS _ exp m NS _ th 1 × 100. The theoretical nano-silica is expressed as (3) m NS _ th 1 = m ol × M SiO 2 × M ol, where m ol is the mass ...
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are manufactured industrially for a diverse array of ap- plications. Silicas are mainly used for reinforcing, thick- ening and flattening purposes. World demand for spe- cialty silicas, which include precipitated silica, fumed silica, silica gel and silica sol, will rise 6.3 percent per year to 2.7 million metric tons in 2014 [1]. There are two main routes for the productions of syn- thetic ...
Read More
The process consists of three steps: (1) dissolution of olivine; (2) precipitation of magnesite and (3) precipitation of silica. Separation and precipitation of the reaction products do not require chemical additives, such as acids or bases, and there will thus be few requirements of chemical reclamation. A semi-continuous set of laboratory-scale experiments including process steps 1 and 2 have been
Read More
The separation and washing of the olivine nano-silica increases the specific surface area and the pore volume. Washing does not affect the texture of the silica, but removes the magnesium sulfate from the pores. Therefore, the washing of olivine nano-silica can be con-sidered as the extraction of magnesium sulfate from the porous system. Lieftink [5] reported that seven washing steps of 100 ml
Read More
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