Abstract: The present disclosure relates to an inorganic binder composition for casting, including: water glass of 40 to 70 parts by weight; nano-silica of 5 to 35 parts by weight; a Li-based water resistant additive of 0.1 to 10 parts by weight; an organic silicon compound of 0.1 to 10 parts by weight; and an anti-sand burning additive of 1 to 10 parts by weight. Furthermore, the present disclosure relates to a core manufactured by using the inorganic binder composition and a cast manufactured so as to include the core.

Abstract: The present disclosure relates to a manufacturing method of a core using an inorganic binder, a core manufactured thereby, a manufacturing method of a casting product with a core using an inorganic binder, a casting product manufactured thereby, and a manufacturing system of a core using an inorganic binder.

Abstract: The present disclosure relates to a manufacturing method of a core using an inorganic binder, a core manufactured thereby, a manufacturing method of a casting product with a core using an inorganic binder, a casting product manufactured thereby, and a manufacturing system of a core using an inorganic binder.

Abstract: The present disclosure relates to an inorganic binder composition for casting, including: water glass of 40 to 70 parts by weight; nano-silica of 5 to 35 parts by weight; a Li-based water resistant additive of 0.1 to 10 parts by weight; an organic silicon compound of 0.1 to 10 parts by weight; and an anti-sand burning additive of 1 to 10 parts by weight. Furthermore, the present disclosure relates to a core manufactured by using the inorganic binder composition and a cast manufactured so as to include the core.

Abstract: Disclosed are a catalyst for synthesizing glycerol carbonate from glycerol and a method for producing the catalyst. The method includes adding an aqueous NaOH solution, an aqueous KOH solution, or a mixture of an aqueous NH4(OH) solution and an aqueous NaOH solution to an aqueous solution of a mixture of zinc nitrate and aluminum nitrate, aging the mixture, filtering and washing the aged mixture to obtain a solid, and calcining the solid under an oxygen, nitrogen or helium atmosphere. The use of the catalyst enables the synthesis of glycerol carbonate from glycerol and urea with high conversion rate, selectivity and yield. Further disclosed is a method for synthesizing glycerol carbonate from glycerol using the catalyst.

Abstract: Disclosed are a catalyst for synthesizing glycerol carbonate from glycerol and a method for producing the catalyst. The method includes adding an aqueous NaOH solution, an aqueous KOH solution, or a mixture of an aqueous NH4(OH) solution and an aqueous NaOH solution to an aqueous solution of a mixture of zinc nitrate and aluminum nitrate, aging the mixture, filtering and washing the aged mixture to obtain a solid, and calcining the solid under an oxygen, nitrogen or helium atmosphere. The use of the catalyst enables the synthesis of glycerol carbonate from glycerol and urea with high conversion rate, selectivity and yield. Further disclosed is a method for synthesizing glycerol carbonate from glycerol using the catalyst.

Abstract: A separation, purification and recovery method of SF6, HFCs or PFCs is disclosed, which comprises a step for forming a gas hydrate including components in addition to SF6, HFCs or PFCs. It is possible to separate and recover fluoro-gas at a much lower cost as compared to a conventional method for thereby obtaining an economical effect and preventing an emission of SF6, HFCs or PFCs which corresponds to Non-CO2 having a higher earth warming index, which leads to preventing an earth warming phenomenon. So, the present invention might be widely applied.

Abstract: A separation, purification and recovery method of SF6, HFCs or PFCs is disclosed, which comprises a step for forming a gas hydrate including components in addition to SF6, HFCs or PFCs. It is possible to separate and recover fluoro-gas at a much lower cost as compared to a conventional method for thereby obtaining an economical effect and preventing an emission of SF6, HFCs or PFCs which corresponds to Non-CO2 having a higher earth warming index, which leads to preventing an earth warming phenomenon. So, the present invention might be widely applied.