PROCESS AND PLANT FOR DECONTAMINATING PHOSPHORIC ACID SOLUTION
The invention relates to a method for recycling of phosphoric acid solution from a decontamination bath, which solution is contaminated with radioactive components, wherein the used phosphoric acid solution is diluted with aqueous oxalic acid solution, in order to separate off iron oxalate in this c...
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| creator | EDLER, Gerd STARKE, Holger |
| description | The invention relates to a method for recycling of phosphoric acid solution from a decontamination bath, which solution is contaminated with radioactive components, wherein the used phosphoric acid solution is diluted with aqueous oxalic acid solution, in order to separate off iron oxalate in this connection, and the phosphoric acid solution is used for decontamination of further system parts, wherein the iron ion content in the phosphoric acid in the decontamination bath is continuously measured, and phosphoric acid is continuously withdrawn from the decontamination bath and concentrated and purified phosphoric acid is replaced, so that a specific concentration of dissolved iron in the contamination bath is not exceeded, and to a system for implementation of the method. The solution has the advantage that only small amounts of phosphoric acid are in circulation in a system for recycling of a phosphoric acid solution from a decontamination bath, whereby the required work volume in the system tanks is significantly reduced. Resulting from this, it is possible to undertake purging of iron ions stemming from electrochemical decontamination, from phosphoric acid solution, using mobile systems. |
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The solution has the advantage that only small amounts of phosphoric acid are in circulation in a system for recycling of a phosphoric acid solution from a decontamination bath, whereby the required work volume in the system tanks is significantly reduced. Resulting from this, it is possible to undertake purging of iron ions stemming from electrochemical decontamination, from phosphoric acid solution, using mobile systems.</description><language>eng ; fre ; ger</language><subject>CHEMISTRY ; COMPOUNDS THEREOF ; DECONTAMINATION ARRANGEMENTS THEREFOR ; INORGANIC CHEMISTRY ; METALLURGY ; NON-METALLIC ELEMENTS ; NUCLEAR ENGINEERING ; NUCLEAR PHYSICS ; PERFORMING OPERATIONS ; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL ; PHYSICS ; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT ; SEPARATION ; TRANSPORTING ; TREATING RADIOACTIVELY CONTAMINATED MATERIAL</subject><creationdate>2017</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20171213&DB=EPODOC&CC=EP&NR=2723681B1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20171213&DB=EPODOC&CC=EP&NR=2723681B1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>EDLER, Gerd</creatorcontrib><creatorcontrib>STARKE, Holger</creatorcontrib><title>PROCESS AND PLANT FOR DECONTAMINATING PHOSPHORIC ACID SOLUTION</title><description>The invention relates to a method for recycling of phosphoric acid solution from a decontamination bath, which solution is contaminated with radioactive components, wherein the used phosphoric acid solution is diluted with aqueous oxalic acid solution, in order to separate off iron oxalate in this connection, and the phosphoric acid solution is used for decontamination of further system parts, wherein the iron ion content in the phosphoric acid in the decontamination bath is continuously measured, and phosphoric acid is continuously withdrawn from the decontamination bath and concentrated and purified phosphoric acid is replaced, so that a specific concentration of dissolved iron in the contamination bath is not exceeded, and to a system for implementation of the method. The solution has the advantage that only small amounts of phosphoric acid are in circulation in a system for recycling of a phosphoric acid solution from a decontamination bath, whereby the required work volume in the system tanks is significantly reduced. Resulting from this, it is possible to undertake purging of iron ions stemming from electrochemical decontamination, from phosphoric acid solution, using mobile systems.</description><subject>CHEMISTRY</subject><subject>COMPOUNDS THEREOF</subject><subject>DECONTAMINATION ARRANGEMENTS THEREFOR</subject><subject>INORGANIC CHEMISTRY</subject><subject>METALLURGY</subject><subject>NON-METALLIC ELEMENTS</subject><subject>NUCLEAR ENGINEERING</subject><subject>NUCLEAR PHYSICS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</subject><subject>PHYSICS</subject><subject>PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT</subject><subject>SEPARATION</subject><subject>TRANSPORTING</subject><subject>TREATING RADIOACTIVELY CONTAMINATED MATERIAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2017</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLALCPJ3dg0OVnD0c1EI8HH0C1Fw8w9ScHF19vcLcfT19HMM8fRzVwjw8A8G4iBPZwVHZ08XhWB_n9AQT38_HgbWtMSc4lReKM3NoODmGuLsoZtakB-fWlyQmJyal1oS7xpgZG5kbGZh6GRoTIQSABVTKeM</recordid><startdate>20171213</startdate><enddate>20171213</enddate><creator>EDLER, Gerd</creator><creator>STARKE, Holger</creator><scope>EVB</scope></search><sort><creationdate>20171213</creationdate><title>PROCESS AND PLANT FOR DECONTAMINATING PHOSPHORIC ACID SOLUTION</title><author>EDLER, Gerd ; STARKE, Holger</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP2723681B13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>2017</creationdate><topic>CHEMISTRY</topic><topic>COMPOUNDS THEREOF</topic><topic>DECONTAMINATION ARRANGEMENTS THEREFOR</topic><topic>INORGANIC CHEMISTRY</topic><topic>METALLURGY</topic><topic>NON-METALLIC ELEMENTS</topic><topic>NUCLEAR ENGINEERING</topic><topic>NUCLEAR PHYSICS</topic><topic>PERFORMING OPERATIONS</topic><topic>PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL</topic><topic>PHYSICS</topic><topic>PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT</topic><topic>SEPARATION</topic><topic>TRANSPORTING</topic><topic>TREATING RADIOACTIVELY CONTAMINATED MATERIAL</topic><toplevel>online_resources</toplevel><creatorcontrib>EDLER, Gerd</creatorcontrib><creatorcontrib>STARKE, Holger</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>EDLER, Gerd</au><au>STARKE, Holger</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS AND PLANT FOR DECONTAMINATING PHOSPHORIC ACID SOLUTION</title><date>2017-12-13</date><risdate>2017</risdate><abstract>The invention relates to a method for recycling of phosphoric acid solution from a decontamination bath, which solution is contaminated with radioactive components, wherein the used phosphoric acid solution is diluted with aqueous oxalic acid solution, in order to separate off iron oxalate in this connection, and the phosphoric acid solution is used for decontamination of further system parts, wherein the iron ion content in the phosphoric acid in the decontamination bath is continuously measured, and phosphoric acid is continuously withdrawn from the decontamination bath and concentrated and purified phosphoric acid is replaced, so that a specific concentration of dissolved iron in the contamination bath is not exceeded, and to a system for implementation of the method. The solution has the advantage that only small amounts of phosphoric acid are in circulation in a system for recycling of a phosphoric acid solution from a decontamination bath, whereby the required work volume in the system tanks is significantly reduced. Resulting from this, it is possible to undertake purging of iron ions stemming from electrochemical decontamination, from phosphoric acid solution, using mobile systems.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS THEREOF DECONTAMINATION ARRANGEMENTS THEREFOR INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS NUCLEAR ENGINEERING NUCLEAR PHYSICS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT SEPARATION TRANSPORTING TREATING RADIOACTIVELY CONTAMINATED MATERIAL |
| title | PROCESS AND PLANT FOR DECONTAMINATING PHOSPHORIC ACID SOLUTION |
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