Patent application number | Description | Published |
20100160151 | Method for manufacturing ammonia gas absorbent using Fe-zeolite - A method is developed for fabrication of an ammonia gas adsorbent using Fe-zeolite. This method uses Fe-zeolite obtained from municipal waste slag to prepare a gas adsorbent, thereby reusing molten slag as a specified waste so as to improve the value of the waste. To achieve the purpose, the method includes mixing Fe-zeolite powder with a forming adjuvant to prepare a mixture; adding a forming agent to the mixture to obtain a granular Fe-zeolite product; and drying and calcining the obtained granular Fe-zeolite product. Therefore, Fe-zeolite obtained from molten slag as a waste product can be reused as an ammonia gas adsorbent. | 06-24-2010 |
20120219477 | METHOD FOR EXTRACTING RARE EARTH MATERIAL FROM MONAZITE - A method for extracting rare earth elements from monazite is disclosed. The method includes milling a mixture of monazite including phosphates and rare earth elements and sodium hydroxides inside a mill containing a plurality of balls to form powder by colliding the mixture into balls with each other, converting the mixture into rare earth hydroxides and sodium phosphates through the reaction occurring in the process of repeated collision, and extracting rare earth elements from the powder. | 08-30-2012 |
20120269714 | Method of Producing Calcite Capable of Controlling a Grain Size Thereof - Provided is a method of synthesizing high-purity calcite capable of controlling a grain size thereof, by reacting an aqueous calcium chloride solution with CO | 10-25-2012 |
20130287672 | Method for Increasing Efficiency in Mineral Carbonation Using Furnace Slag as Industrial Byproduct - Provided is a method for fixing carbon dioxide, the method includding: pulverizing furnace slag; mixing water and the furnace slag such that the furnace slag is present in a concentration of 5˜15 parts by weight based on 100 parts by weight of water; adding NaOH to the mixture; and supplying carbon dioxide to the decomposed mixture, and then carrying out a hydrothermal reaction, so that carbon dioxide can be stably fixed; the treatment of the furnace slag can lead to ecofriendly effects; and the use of the furnace slag can lead to production of carbonate minerals as the final product. | 10-31-2013 |
20140243575 | METHOD OF REMOVING ASBESTOS FROM ASBESTOS-CONTAINING MATERIALS BY 99% THROUGH LOW TEMPERATURE HEAT TREATMENT - Disclosed is a method of removing asbestos from an asbestos-containing material by 99% through low temperature heat treatment. The method includes mixing an asbestos-containing material with an oxalic acid at a weight ratio in a range of 1:0.002 to 1:1 and performing heat treatment with respect to a mixture at a temperature of 90° C. to 110° C. to remove asbestos from the asbestos-containing material by 99% or more. | 08-28-2014 |
20140318417 | Surface Modification Method of Calcite - Provided is a surface modification method of calcite powder prepared from desulfurized gypsum and heat-treated at a high temperature. According to the surface modification method, hydrophilic calcite powder having polarity may be changed into hydrophobic non-polar calcite powder by safely adsorbing a surface modifier onto a surface of the calcite powder and coating the surface with non-polar fatty acid. Particularly, in the case in which calcite powder heat-treated at a high temperature is hydrophobized, a significantly excellent hydrophobic surface property may be implemented. | 10-30-2014 |
20140378735 | METHOD OF DETOXIFYING ASBESTOS CONTAINED IN WASTE SLATE AND DETOXIFIED ASBESTOS OBTAINED THROUGH THE SAME - Disclosed is a method of detoxifying asbestos of waste slate. The method includes concentrating the asbestos by introducing hydrochloric acid aqueous solution into waste slate powder to dissolve and remove a limestone component contained in the waste slate; and mixing the concentrated asbestos with oxalic acid and performing a low-temperature heat treatment. The waste slate is crushed and pulverized and powder of the crushed and pulverized waste slate is formed in a size in a range of 100 meshes to 300 meshes. The detoxified asbestos includes re-crystallized magnesium oxalate having a rhombohedral or amorphous shape. | 12-25-2014 |
20150050206 | METHOD OF PREPARING CALCIUM CARBONATE USING DIRECT CARBONATION REACTION - Disclosed is a method of preparing calcium carbonate using a direct carbonation reaction. The method includes dissolving fuel gas desulfurization gypsum into an ammonia solution, performing a filtering process after making a carbonation reaction by feeding carbon dioxide into the ammonia solution in which the fuel gas desulfurization gypsum is dissolved, and performing a filtering process after precipitating the calcium carbonate by maintaining a filtered solution in a stationary state. | 02-19-2015 |