Method and apparatus for treating waste material and a product gas
US-2015240170-A1 · Aug 27, 2015 · US
Method for treating waste material
US2022230771A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2022230771-A1 |
| Application number | US-202017609079-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 6, 2020 |
| Priority date | May 6, 2019 |
| Publication date | Jul 21, 2022 |
| Grant date | — |
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Abstract
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The present invention relates to a method for treating waste material comprising organic components and low and/or medium level radioactive agents. The method comprises encapsulating the waste material into a matrix, gasifying the waste material at a temperature between 600 and 950° C. to form a gaseous fraction and a solid fraction comprising low and/or medium level radioactive agents and combustion residues of the organic components and encapsulating the solid fraction by a geopolymer matrix comprising metakaolin.
First claim
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1 . A method for treating waste material comprising organic components and low and/or medium level radioactive agents, the method comprises encapsulating the waste material into a matrix, wherein the method comprises gasifying the waste material at a temperature between 600 and 950° C. to form a gaseous fraction and a solid fraction comprising low and/or medium level radioactive agents and combustion residues of the organic components and encapsulating the solid fraction by a geopolymer matrix comprising metakaolin. 2 . The method according to claim 1 , wherein the method comprises mixing the solid fraction with metakaolin. 3 . The method according to claim 2 , wherein the method comprises adding aqueous solution of a silicate or a mixture of silicates and a hydroxide or a mixture of hydroxides to the mixture of the solid fraction and metakaolin. 4 . The method according to claim 3 , wherein the method comprises adding a sodium silicate or a potassium silicate or both. 5 . The method according to claim 3 , wherein the method comprises adding sodium hydroxide or potassium hydroxide or both. 6 . The method according to claim 3 , wherein the method comprises agitating the mixture until a homogenous paste is achieved. 7 . The method according to claim 6 , whereinwherein the method comprises heating the homogenous paste in humid or autogeneous conditions in order to initiate a polysialate polymerization process. 8 . The method according to claim 6 , wherein the method comprises settling the homogenous paste at room temperature. 9 . The method according to claim 7 , wherein the method comprises heating in order to remove water.
Assignees
Inventors
Classifications
Production of cement, e.g. improving or optimising the production methods; Cement grinding · CPC title
- B09B3/25Primary
using mineral binders or matrix · CPC title
Kaolin · CPC title
Polysilicates, e.g. geopolymers · CPC title
of the alkali or alkaline-earth metals · CPC title
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- What does patent US2022230771A1 cover?
- The present invention relates to a method for treating waste material comprising organic components and low and/or medium level radioactive agents. The method comprises encapsulating the waste material into a matrix, gasifying the waste material at a temperature between 600 and 950° C. to form a gaseous fraction and a solid fraction comprising low and/or medium level radioactive agents and comb…
- Who is the assignee on this patent?
- Teknologian Tutkimuskeskus Vtt Oy
- What technology area does this patent fall under?
- Primary CPC classification B09B3/25. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Jul 21 2022 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).