TH27225B - Highly structured silica sludge - Google Patents

Abstract

DC60 This invention deals with highly structured precipitated silka used as an issue in the drying process. With short retention time, silica manufacturing process and utilization Precipitated silica is characterized by the chemical-physical characteristics shown below, pH (5% in water) (ISO 787-9) 3-8 BET surface area (DIN 66131) (square meter per gram) 400. -600 DBP adsorption value (DIN 53601, relative to dry substance) (gram per 100g) 380-420 tapped density (ISO 787-11) (gram / liter) 100-200 rest ALPINE sieve larger than 63 Microns (percent) 0.1-40 (ISO 8130-1) This invention relates to highly structured precipitated silica used as an issue in the drying process. With short retention time, silica processing and utilization Precipitated silica is characterized by its chemical-physical characteristics shown below: pH (5% in water) (ISO 787-9) 3-8 BET surface area (DIN 66131) (square meter per gram). 400-600 DBP adsorption value (DIN 53601, relative to dry substance) (gram per 100g) 380-420 tapped density (ISO 787-11) (gram / liter) 100-200 Rest Larger ALPINE sieve. 63 microns (percent) 0.1-40 (ISO 8130-1):

Claims (9)

1. Precipitated silica with the chemical-physical characteristics shown below, pH (5% in water) (ISO 787-9) 3 -8 BET surface area (DIN 66131) (square meter per gram) 400- 600 DBP adsorption value (DIN 53601, relative to dry substance) (gram per 100g) 382-420 tapped density (ISO 787-11) (gram / liter) 100-200 Rest ALPINE sieve larger than 63 m Cor (%) 0.1-40 (ISO 8130-1) 2. Precipitated silica according to claim 1, with the chemical-physical characteristics shown below, pH (5% in water) (ISO 787 -9) 3-8 BET surface area (DIN 66131) (square meter per gram) 400-600 DBP adsorption value (DIN 53601, relative to dry matter) (gram per 100g) 382-420 tapped density (ISO 787-11) (gram / liter) 140-200 rest ALPINE sieve larger than 63 microns (%) 10-40 (ISO 8130-1) 3. Precipitated silica according to claim 1, which has chemical characteristics. - Physical shown below PH value (5% in water) (ISO 787-9) 3-8 BET surface area (DIN 66131) (square meter per gram) 400-600 DBP adsorption value (DIN 53601, Relative to dry matter) (grams per 100 grams) 3 82-420 tapped density (ISO 787-11) (gram per liter) 140-180 residual ALPINE sieve larger than 63 microns (percent) 1-10 (ISO 8130-1) 4. Precipitated silica according to the holding. Right 1, with the chemical-physical characteristics shown below, PH value (5% in water) (ISO 787-9) 3-8 BET surface area (DIN 66131) (square meter per gram) 400-600 value. DBP adsorption (DIN 53601, relative to dry substance) (gram per 100 g) 382-420 tapped density (ISO 787-11) (gram / liter) 100-130 the remainder ALPINE sieve larger than 63 microns (hundred Each) 0.1-1 (ISO 8130-1) 5. Production process for precipitated silica Which consists of While stirring the water in the container with sufficient force to put the medium under shear with the Heated at 35 ° C to 45 ° C a) Water and sulfuric acid were added to the container for at least 100 minutes and maintained at pH 6-7. The solids were retained for 60 to 120 minutes and when filling was finished, 36 to 42 g / l solids were left and b) filtered solid material, cleared filtered cakes. And bring solid substances into the process of making Dry with a short retention time Where precipitated silica Has a chemical-physical feature As shown below, PH value (5% in water) (ISO 787-9) 3-8 BET surface area (DIN 66131) (square meter per gram) 400-600 DBP adsorption value (DIN 53601, relative to Dry substance) (gram per 100g) 382-420 tapped density (ISO 787-11) (gram per liter) 100-130 residual, ALPINE sieve larger than 63 microns (percent) 0.1-1 (ISO 8130-1 ) 6. Process according to claim 5, which consists of performing a short retention time drying process (c) by making the filtered cake liquid with less than a percent solid content. 18 by weight and dried by spraying the resulting solids. 7. Process according to claim 6, where the short retention time drying method in (c) is performed by The filtered cakes are dried with a fast continuous spin dryer. 8. Process according to claim 6, wherein the silica obtained after the retention time of the retarding drying process is reduced. The shortening was adjusted to pH 7 to 8 with ammonia gas 9. Process according to claim 6, in which the filtered cakes were washed with diluted sulfuric acid 1 0. Method of formulation of animal feed. Containing The combination of the nutritional components of the feed with precipitated silica of claim 1 is vehicle 1. 1. Methods of formulation of vitamin formulations. Containing Combination of vitamin components of vitamin formula with silica that precipitate of claim 1 is vehicle 1. 2. Methods of catalyst formulation Containing The combination of the catalyst component with the precipitated silica of claim 1 is the vehicle for the catalytic active component 1. 3. Methods for formulation of free-flowing mixtures Containing Formulation of the mixture with precipitated silica of claim 1, acting It is a free-flowing substance or an anti-coagulation agent. 4. Method of converting liquid into powder. Containing The combination of the said liquid with the precipitated silica of claim 1 is an auxiliary agent. Liquid into powder form 1 5. Powder prepared by method of claim 14 1 6. Elastomers containing mixed matter were prepared by combining elastomers with precipitated silica. Of claim 1 1 7.Methods for producing reactive vectors Containing Combination of the catalyst vehicle components with precipitated silica of claim 1 1. 8. Precipitated silica according to claim 1, where the DBP adsorption value (DIN 53601, relative to dry matter) is at least 383 g per 100 g 1. 9. Precipitated silica according to claim 1, where the DBP adsorption value (DIN 53601, relative to dry matter) is at least 387 g per 100 g.