Method for solidifying and sealing in a toxic substance with sulfur
AssigneesIkari-Laboratory for Environmental Science Co., Ltd., Nishida Mining Co., Ltd., Tanaka Iron Works Co., Ltd.
InventorsYoshikatsu Ikari, Takuya Yamato, Chujiro Nishida, Katsuyoshi Toyofuku, Toshiyuki Kokubu
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Abstract
A method for manufacturing materials solidified with sulfur, comprising the steps of bringing the water content of a mixture of sulfur and a raw material to less than 3% by weight, heating and mixing the mixture of raw materials including molten sulfur at 119 to 159° C., to cause the sulfur to penetrate and encapsulate the raw material that is solid or liquid at the molecular level, thereby preparing a fluid mixture, and, if necessary, then molding the mixture into a desired shape or cooling it into a granular form.
Claims19
A process for safe disposal of all toxic substances, the process comprising the steps of:
- (a) providing a sulfur-based material;
- (b) mixing said sulfur-based material with said toxic substances;
- (c) reducing the water content of said mixture;
- (d) heating said mixture to approximately between 130 to 159° C.;
- and
- (e) cooling said mixture,
- wherein the weight ratio of sulfur to toxic substance is in the range of about 1:1×10−7 to 1:1×10−3,
- wherein said mixture in step (e) is non-toxic, and wherein said toxic substances have a boiling point higher than the temperature necessary to melt sulfur and the solubility characteristics in a low-polar solvent, the low-polar solvent being eluted earlier than t-butanol when eluted from a silica gel column.
A process for safe disposal of all toxic substances, the process comprising the steps of:
- (a) providing a sulfur-based compound;
- (b) mixing said sulfur-based compound with said toxic substances;
- (c) reducing the water content of said mixture;
- (d) heating said mixture to approximately between 130 to 159° C.;
- and
- (e) cooling said mixture,
- wherein the weight ratio of sulfur to toxic substance is in the range of about 1:1×10−7 to 1:1×10−3,
- wherein said mixture in step (e) is non-toxic, and wherein said toxic substances have a boiling point higher than the temperature necessary to melt sulfur and the solubility characteristics in a low-polar solvent, the low-polar solvent being eluted earlier than t-butanol when eluted from a silica gel column.
A process for safe disposal of all toxic substances, the process comprising the steps of:
- (a) providing a sulfur-based substance;
- (b) mixing said sulfur-based substance with said toxic substances;
- (c) reducing the water content of said mixture;
- (d) heating said mixture to approximately between 130 to 159° C.;
- and
- (e) cooling said mixture,
- wherein the weight ratio of sulfur to toxic substance is in the range of about l:1×10−7 to l:1×10−3,
- wherein said mixture in step (e) is non-toxic, and wherein said toxic substances have a boiling point higher than the temperature necessary to melt sulfur and the solubility characteristics in a low-polar solvent, the low-polar solvent being eluted earlier than t-butanol when eluted from a silica gel column.
A process for safe disposal of all toxic substances, the process comprising the steps of:
- (a) providing sulfur;
- (b) mixing said sulfur with said toxic substances;
- (c) reducing the water content of said mixture;
- (d) heating said mixture to approximately between 130 to 159° C.;
- and
- (e) cooling said mixture,
- wherein the weight ratio of sulfur to toxic substance is in the range of about l:1×10−7 to l:1×10−3,
- wherein said mixture in step (e) is non-toxic, and wherein said toxic substances have a boiling point higher than the temperature necessary to melt sulfur and the solubility characteristics in a low-polar solvent, the low-polar solvent being eluted earlier than t-butanol when eluted from a silica gel column.
Dependencies are inferred from the claim text.