PROCESS FOR PREPARING A CRYSTALLINE L-MGDA TRI-ALKALI METAL SALT
What is proposed is a process for preparing a crystalline L-MGDA tri-alkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis proceeding from L-α-alanine, by reaction with formaldehyde and hydrogen cyanide to give L-α-alanine-N,N-diacetoni...
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| creator | GEROLD BRAUN ALFRED OFTRING ARNULF LAUTERBACH MAXIM WEBER |
| description | What is proposed is a process for preparing a crystalline L-MGDA tri-alkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis proceeding from L-α-alanine, by reaction with formaldehyde and hydrogen cyanide to give L-α-alanine-N,N-diacetonitrile and subsequent alkaline hydrolysis of the L-α-alanine-N,N-diacetonitrile to give the L-MGDA tri-alkali metal salt, which is characterized in that a temperature of 150°C is not exceeded in the course of alkaline hydrolysis.
Lo que se propone es un procedimiento para preparar la sal trialcalinometálica cristalina de L-MGDA mediante cristalización a partir de una solución acuosa de esta sal, habiéndose obtenido dicha sal por síntesis de Strecker partiendo de L-a-alanina por vía de una reacción con formaldehido y cianuro de hidrógeno con el fin de preparar L-a-alanina-N,N-diacetonitrilo y una subsiguiente hidrólisis alcalina del L-a-alaninaN,N-diacetonitrilo para dar la sal trialcalinometálica de L-MGDA, caracterizado porque en el curso de esa hidrólisis alcalina no se supera la temperatura de 150° C. |
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Lo que se propone es un procedimiento para preparar la sal trialcalinometálica cristalina de L-MGDA mediante cristalización a partir de una solución acuosa de esta sal, habiéndose obtenido dicha sal por síntesis de Strecker partiendo de L-a-alanina por vía de una reacción con formaldehido y cianuro de hidrógeno con el fin de preparar L-a-alanina-N,N-diacetonitrilo y una subsiguiente hidrólisis alcalina del L-a-alaninaN,N-diacetonitrilo para dar la sal trialcalinometálica de L-MGDA, caracterizado porque en el curso de esa hidrólisis alcalina no se supera la temperatura de 150° C.</description><language>eng ; spa</language><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS ; CHEMISTRY ; METALLURGY ; ORGANIC CHEMISTRY</subject><creationdate>2014</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=20140210&DB=EPODOC&CC=MX&NR=2013012811A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20140210&DB=EPODOC&CC=MX&NR=2013012811A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GEROLD BRAUN</creatorcontrib><creatorcontrib>ALFRED OFTRING</creatorcontrib><creatorcontrib>ARNULF LAUTERBACH</creatorcontrib><creatorcontrib>MAXIM WEBER</creatorcontrib><title>PROCESS FOR PREPARING A CRYSTALLINE L-MGDA TRI-ALKALI METAL SALT</title><description>What is proposed is a process for preparing a crystalline L-MGDA tri-alkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis proceeding from L-α-alanine, by reaction with formaldehyde and hydrogen cyanide to give L-α-alanine-N,N-diacetonitrile and subsequent alkaline hydrolysis of the L-α-alanine-N,N-diacetonitrile to give the L-MGDA tri-alkali metal salt, which is characterized in that a temperature of 150°C is not exceeded in the course of alkaline hydrolysis.
Lo que se propone es un procedimiento para preparar la sal trialcalinometálica cristalina de L-MGDA mediante cristalización a partir de una solución acuosa de esta sal, habiéndose obtenido dicha sal por síntesis de Strecker partiendo de L-a-alanina por vía de una reacción con formaldehido y cianuro de hidrógeno con el fin de preparar L-a-alanina-N,N-diacetonitrilo y una subsiguiente hidrólisis alcalina del L-a-alaninaN,N-diacetonitrilo para dar la sal trialcalinometálica de L-MGDA, caracterizado porque en el curso de esa hidrólisis alcalina no se supera la temperatura de 150° C.</description><subject>ACYCLIC OR CARBOCYCLIC COMPOUNDS</subject><subject>CHEMISTRY</subject><subject>METALLURGY</subject><subject>ORGANIC CHEMISTRY</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2014</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHAICPJ3dg0OVnDzD1IICHINcAzy9HNXcFRwDooMDnH08fH0c1Xw0fV1d3FUCAny1HX08Xb08VTwdQXKKQQ7-oTwMLCmJeYUp_JCaW4GJTfXEGcP3dSC_PjU4oLE5NS81JJ43wgjA0NjA0MjC0NDR2OiFAEA5toq0w</recordid><startdate>20140210</startdate><enddate>20140210</enddate><creator>GEROLD BRAUN</creator><creator>ALFRED OFTRING</creator><creator>ARNULF LAUTERBACH</creator><creator>MAXIM WEBER</creator><scope>EVB</scope></search><sort><creationdate>20140210</creationdate><title>PROCESS FOR PREPARING A CRYSTALLINE L-MGDA TRI-ALKALI METAL SALT</title><author>GEROLD BRAUN ; ALFRED OFTRING ; ARNULF LAUTERBACH ; MAXIM WEBER</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_MX2013012811A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; spa</language><creationdate>2014</creationdate><topic>ACYCLIC OR CARBOCYCLIC COMPOUNDS</topic><topic>CHEMISTRY</topic><topic>METALLURGY</topic><topic>ORGANIC CHEMISTRY</topic><toplevel>online_resources</toplevel><creatorcontrib>GEROLD BRAUN</creatorcontrib><creatorcontrib>ALFRED OFTRING</creatorcontrib><creatorcontrib>ARNULF LAUTERBACH</creatorcontrib><creatorcontrib>MAXIM WEBER</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GEROLD BRAUN</au><au>ALFRED OFTRING</au><au>ARNULF LAUTERBACH</au><au>MAXIM WEBER</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>PROCESS FOR PREPARING A CRYSTALLINE L-MGDA TRI-ALKALI METAL SALT</title><date>2014-02-10</date><risdate>2014</risdate><abstract>What is proposed is a process for preparing a crystalline L-MGDA tri-alkali metal salt by crystallization from an aqueous solution thereof which has been obtained by Strecker synthesis proceeding from L-α-alanine, by reaction with formaldehyde and hydrogen cyanide to give L-α-alanine-N,N-diacetonitrile and subsequent alkaline hydrolysis of the L-α-alanine-N,N-diacetonitrile to give the L-MGDA tri-alkali metal salt, which is characterized in that a temperature of 150°C is not exceeded in the course of alkaline hydrolysis.
Lo que se propone es un procedimiento para preparar la sal trialcalinometálica cristalina de L-MGDA mediante cristalización a partir de una solución acuosa de esta sal, habiéndose obtenido dicha sal por síntesis de Strecker partiendo de L-a-alanina por vía de una reacción con formaldehido y cianuro de hidrógeno con el fin de preparar L-a-alanina-N,N-diacetonitrilo y una subsiguiente hidrólisis alcalina del L-a-alaninaN,N-diacetonitrilo para dar la sal trialcalinometálica de L-MGDA, caracterizado porque en el curso de esa hidrólisis alcalina no se supera la temperatura de 150° C.</abstract><oa>free_for_read</oa></addata></record> |
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| title | PROCESS FOR PREPARING A CRYSTALLINE L-MGDA TRI-ALKALI METAL SALT |
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