Degreasing composition and production method thereof

Abstract

As a method for producing a degreasing composition in the form of a slurry, crystallization of the composition during low-temperature storage being suppressed and the composition being used for preparing a cleaning liquid having little environmental impact, provided is a method including a step of obtaining a slurry by mixing a first liquid and a powdery silicate having a particle diameter ranging from 0.2 mm to 10 mm, wherein the first liquid contains an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide, an alcohol having three or fewer carbon atoms, and water; and the degreasing composition contains, with respect to the total composition, 10 mass % to 60 mass % of the alkaline component, 0.1 mass % to 5 mass % of the alcohol, 1 mass % to 50 mass % of the silicate, and 20 mass % to 50 mass % of water including hydration water of the silicate, and contains no chelating agent.

1 . A degreasing composition production method being a method for producing a degreasing composition in the form of a slurry for preparing a cleaning liquid, the method comprising:
 a step of obtaining a slurry by mixing a first liquid and a powdery silicate having a particle diameter ranging from 0.2 mm to 10 mm,   wherein the first liquid contains an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide, an alcohol having three or fewer carbon atoms, and water, and   the degreasing composition contains, with respect to the total composition, 10 mass % to 60 mass % of the alkaline component, 0.1 mass % to 5 mass % of the alcohol, 1 mass % to 50 mass % of the silicate, and 20 mass % to 50 mass % of water including hydration water of the silicate, and contains no chelating agent.   
     
     
         2 . A degreasing composition production method being a method for producing a degreasing composition in the form of a slurry for preparing a cleaning liquid, the method comprising:
 a step of obtaining a slurry by mixing a second liquid and a powdery silicate having a particle diameter ranging from 0.2 mm to 10 mm,   wherein the second liquid contains an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide, an alcohol having three or fewer carbon atoms, a chelating agent, and water, and   the degreasing composition contains, with respect to the total composition, 10 mass % to 60 mass % of the alkaline component, 0.1 mass % to 5 mass % of the alcohol, 1 mass % to 50 mass % of the silicate, more than 0.0 mass % but less than 5 mass % of the chelating agent, and 20 mass % to 50 mass % of water including hydration water of the silicate.   
     
     
         3 . A degreasing composition production method being a method for producing a degreasing composition in the form of a slurry for preparing a cleaning liquid, the method comprising:
 a step of obtaining a slurry by mixing a third liquid and a powdery silicate having a particle diameter ranging from 0.2 mm to 10 mm,   wherein the third liquid contains an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide, an alcohol having three or fewer carbon atoms, a chelating agent, and water, and   the degreasing composition contains, with respect to the total composition, 10 mass % to 60 mass % of the alkaline component, more than 0.0 mass % up to 5 mass % of the alcohol, 1 mass % to 50 mass % of the silicate, 5 mass % to 50 mass % of the chelating agent, and 20 mass % to 50 mass % of water including hydration water of the silicate.   
     
     
         4 . A degreasing composition production method being a method for producing a degreasing composition in the form of a slurry for preparing a cleaning liquid, the method comprising:
 a step of obtaining a slurry by mixing a fourth liquid and a powdery silicate having a particle diameter ranging from 0.2 mm to 10 mm,   wherein the fourth liquid contains an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide, a chelating agent, and water, and   the degreasing composition contains, with respect to the total composition, 10 mass % to 60 mass % of the alkaline component, 1 mass % to 50 mass % of the silicate, 5 mass % to 50 mass % of the chelating agent, and 20 mass % to 50 mass % of water including hydration water of the silicate, and contains no alcohol having three or fewer carbon atoms.   
     
     
         5 . The degreasing composition production method according to  claim 2 , wherein the chelating agent is EDTA. 
     
     
         6 . The degreasing composition production method according to  claim 1 , wherein the temperature of the liquid that is mixed with the powdery silicate is not higher than 35° C. at the time when the silicate is added. 
     
     
         7 . The degreasing composition production method according to  claim 1 , wherein the degreasing composition contains 30 mass % or less of a surfactant with respect to the total composition. 
     
     
         8 . A degreasing composition for preparing a cleaning liquid, containing: with respect to the total composition, 10 mass % to 60 mass % of an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide; 0.1 mass % to 5 mass % of an alcohol having three or fewer carbon atoms; 1 mass % to 50 mass % of a silicate; and 20 mass % to 50 mass % of water including hydration water of the silicate, and containing no chelating agent, the degreasing composition being a slurry in which at least part of the silicate is dispersed in the form of silicate particles having a particle diameter no greater than 10 mm, wherein no clumpy crystals form even when the degreasing composition is left to stand in an environment at −2° C. for 24 hours. 
     
     
         9 . A degreasing composition for preparing a cleaning liquid, containing: with respect to the total composition, 10 mass % to 60 mass % of an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide; 0.1 mass % to 5 mass % of an alcohol having three or fewer carbon atoms; 1 mass % to 50 mass % of a silicate; more than 0.0 mass % but less than 5 mass % of a chelating agent; and 20 mass % to 50 mass % of water including hydration water of the silicate, the degreasing composition being a slurry in which at least part of the silicate is dispersed in the form of silicate particles having a particle diameter no greater than 10 mm, wherein no clumpy crystals form even when the degreasing composition is left to stand in an environment at −2° C. for 24 hours. 
     
     
         10 . A degreasing composition for preparing a cleaning liquid, containing: with respect to the total composition, 10 mass % to 60 mass % of an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide; more than 0.0 mass % up to 5 mass % of an alcohol having three or fewer carbon atoms; 1 mass % to 50 mass % of a silicate; 5 mass % to 50 mass % of a chelating agent; and 20 mass % to 50 mass % of water including hydration water of the silicate, the degreasing composition being a slurry in which at least part of the silicate is dispersed in the form of silicate particles having a particle diameter no greater than 10 mm, wherein no clumpy crystals form even when the degreasing composition is left to stand in an environment at −2° C. for 24 hours. 
     
     
         11 . A degreasing composition for preparing a cleaning liquid, containing: with respect to the total composition, 10 mass % to 60 mass % of an alkaline component composed of at least one of sodium hydroxide and potassium hydroxide; 1 mass % to 50 mass % of a silicate; 5 mass % to 50 mass % of a chelating agent; and 20 mass % to 50 mass % of water including hydration water of the silicate, and containing no alcohol having three or fewer carbon atoms, the degreasing composition being a slurry in which at least part of the silicate is dispersed in the form of silicate particles having a particle diameter no greater than 10 mm, wherein no clumpy crystals form even when the degreasing composition is left to stand in an environment at −2° C. for 24 hours. 
     
     
         12 . The degreasing composition according to  claim 9 , wherein the chelating agent is EDTA, and at least part thereof is dispersed in the slurry. 
     
     
         13 . The degreasing composition according to  claim 8 , containing 30 mass % or less of a surfactant with respect to the total composition. 
     
     
         14 . The degreasing composition production method according to  claim 3 , wherein the chelating agent is EDTA. 
     
     
         15 . The degreasing composition production method according to  claim 4 , wherein the chelating agent is EDTA. 
     
     
         16 . The degreasing composition production method according to  claim 2 , wherein the temperature of the liquid that is mixed with the powdery silicate is not higher than 35° C. at the time when the silicate is added. 
     
     
         17 . The degreasing composition production method according to  claim 3 , wherein the temperature of the liquid that is mixed with the powdery silicate is not higher than 35° C. at the time when the silicate is added. 
     
     
         18 . The degreasing composition production method according to  claim 4 , wherein the temperature of the liquid that is mixed with the powdery silicate is not higher than 35° C. at the time when the silicate is added. 
     
     
         19 . The degreasing composition production method according to  claim 2 , wherein the degreasing composition contains 30 mass % or less of a surfactant with respect to the total composition. 
     
     
         20 . The degreasing composition production method according to  claim 3 , wherein the degreasing composition contains 30 mass % or less of a surfactant with respect to the total composition.