Process for preparation of hydroxyapatite
Die Erfindung betrifft ein Verfahren zur Herstellung eines Hydroxylapatits, welcher als Zahnputzkörper geeignet ist, durch Fällung aus wässriger Phosphorsäure und Calciumhydroxidlösung, wobei man eine Calcium-dotierte Phosphorsäurelösung mit einer Suspension von Calciumhydroxid/oxid in einem dem Hyd...
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| creator | RAAB, GUDRUN RAAB, GUENTER MAURER, ALEXANDER DR SCHMITT, REINHOLD SCHOBER, DETLEV TAENZLER, RICHARD |
| description | Die Erfindung betrifft ein Verfahren zur Herstellung eines Hydroxylapatits, welcher als Zahnputzkörper geeignet ist, durch Fällung aus wässriger Phosphorsäure und Calciumhydroxidlösung, wobei man eine Calcium-dotierte Phosphorsäurelösung mit einer Suspension von Calciumhydroxid/oxid in einem dem Hydroxylapatit entsprechendem Molverhältnis von Ca:P = 1,667 gleichzeitig einem Intensivmischorgan zuführt und dort bei Fällungstemperaturen von 60 - 100°C, vorzugsweise 80 - 90°C, und einem pH-Wert von 4 - 8, vorzugsweise von 6,5 - 7,5, umsetzt.
A process for the preparation of a hydroxyapatite, which is suitable as a tooth-cleaning substance, by precipitation from aqueous phosphoric acid and calcium hydroxide solution, in which a calcium-doped phosphoric acid solution is fed to an intensive mixer with a suspension of calcium hydroxide/oxide in a molar ratio of Ca:P=1.667 corresponding to the hydroxyapatite of and reacted there at precipitation temperatures of 60 DEG -100 DEG C., preferably 80 DEG -90 DEG C. and a pH of 4-8, preferably of 6.5-7.5. Also disclosed in a tooth-cleaning substance containing the hydroxyapatite. |
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A process for the preparation of a hydroxyapatite, which is suitable as a tooth-cleaning substance, by precipitation from aqueous phosphoric acid and calcium hydroxide solution, in which a calcium-doped phosphoric acid solution is fed to an intensive mixer with a suspension of calcium hydroxide/oxide in a molar ratio of Ca:P=1.667 corresponding to the hydroxyapatite of and reacted there at precipitation temperatures of 60 DEG -100 DEG C., preferably 80 DEG -90 DEG C. and a pH of 4-8, preferably of 6.5-7.5. Also disclosed in a tooth-cleaning substance containing the hydroxyapatite.</description><edition>5</edition><language>eng ; fre ; ger</language><subject>CHEMISTRY ; COMPOUNDS THEREOF ; DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM ; DYEING OR PRINTING TEXTILES ; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR ; HUMAN NECESSITIES ; HYGIENE ; INORGANIC CHEMISTRY ; LAUNDERING ; MEDICAL OR VETERINARY SCIENCE ; METALLURGY ; NON-METALLIC ELEMENTS ; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES ; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS ; TEXTILES ; TREATMENT OF TEXTILES OR THE LIKE</subject><creationdate>1994</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=19940406&DB=EPODOC&CC=EP&NR=0590374A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19940406&DB=EPODOC&CC=EP&NR=0590374A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>RAAB, GUDRUN</creatorcontrib><creatorcontrib>RAAB, GUENTER</creatorcontrib><creatorcontrib>MAURER, ALEXANDER DR</creatorcontrib><creatorcontrib>SCHMITT, REINHOLD</creatorcontrib><creatorcontrib>SCHOBER, DETLEV</creatorcontrib><creatorcontrib>TAENZLER, RICHARD</creatorcontrib><title>Process for preparation of hydroxyapatite</title><description>Die Erfindung betrifft ein Verfahren zur Herstellung eines Hydroxylapatits, welcher als Zahnputzkörper geeignet ist, durch Fällung aus wässriger Phosphorsäure und Calciumhydroxidlösung, wobei man eine Calcium-dotierte Phosphorsäurelösung mit einer Suspension von Calciumhydroxid/oxid in einem dem Hydroxylapatit entsprechendem Molverhältnis von Ca:P = 1,667 gleichzeitig einem Intensivmischorgan zuführt und dort bei Fällungstemperaturen von 60 - 100°C, vorzugsweise 80 - 90°C, und einem pH-Wert von 4 - 8, vorzugsweise von 6,5 - 7,5, umsetzt.
A process for the preparation of a hydroxyapatite, which is suitable as a tooth-cleaning substance, by precipitation from aqueous phosphoric acid and calcium hydroxide solution, in which a calcium-doped phosphoric acid solution is fed to an intensive mixer with a suspension of calcium hydroxide/oxide in a molar ratio of Ca:P=1.667 corresponding to the hydroxyapatite of and reacted there at precipitation temperatures of 60 DEG -100 DEG C., preferably 80 DEG -90 DEG C. and a pH of 4-8, preferably of 6.5-7.5. Also disclosed in a tooth-cleaning substance containing the hydroxyapatite.</description><subject>CHEMISTRY</subject><subject>COMPOUNDS THEREOF</subject><subject>DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM</subject><subject>DYEING OR PRINTING TEXTILES</subject><subject>FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR</subject><subject>HUMAN NECESSITIES</subject><subject>HYGIENE</subject><subject>INORGANIC CHEMISTRY</subject><subject>LAUNDERING</subject><subject>MEDICAL OR VETERINARY SCIENCE</subject><subject>METALLURGY</subject><subject>NON-METALLIC ELEMENTS</subject><subject>PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES</subject><subject>SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS</subject><subject>TEXTILES</subject><subject>TREATMENT OF TEXTILES OR THE LIKE</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1994</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZNAMKMpPTi0uVkjLL1IoKEotSCxKLMnMz1PIT1PIqEwpyq-oTCwAipSk8jCwpiXmFKfyQmluBgU31xBnD93Ugvz41OKCxOTUvNSSeNcAA1NLA2NzE0dDYyKUAADmGSjP</recordid><startdate>19940406</startdate><enddate>19940406</enddate><creator>RAAB, GUDRUN</creator><creator>RAAB, GUENTER</creator><creator>MAURER, ALEXANDER DR</creator><creator>SCHMITT, REINHOLD</creator><creator>SCHOBER, DETLEV</creator><creator>TAENZLER, RICHARD</creator><scope>EVB</scope></search><sort><creationdate>19940406</creationdate><title>Process for preparation of hydroxyapatite</title><author>RAAB, GUDRUN ; RAAB, GUENTER ; MAURER, ALEXANDER DR ; SCHMITT, REINHOLD ; SCHOBER, DETLEV ; TAENZLER, RICHARD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP0590374A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>1994</creationdate><topic>CHEMISTRY</topic><topic>COMPOUNDS THEREOF</topic><topic>DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM</topic><topic>DYEING OR PRINTING TEXTILES</topic><topic>FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR</topic><topic>HUMAN NECESSITIES</topic><topic>HYGIENE</topic><topic>INORGANIC CHEMISTRY</topic><topic>LAUNDERING</topic><topic>MEDICAL OR VETERINARY SCIENCE</topic><topic>METALLURGY</topic><topic>NON-METALLIC ELEMENTS</topic><topic>PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES</topic><topic>SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS</topic><topic>TEXTILES</topic><topic>TREATMENT OF TEXTILES OR THE LIKE</topic><toplevel>online_resources</toplevel><creatorcontrib>RAAB, GUDRUN</creatorcontrib><creatorcontrib>RAAB, GUENTER</creatorcontrib><creatorcontrib>MAURER, ALEXANDER DR</creatorcontrib><creatorcontrib>SCHMITT, REINHOLD</creatorcontrib><creatorcontrib>SCHOBER, DETLEV</creatorcontrib><creatorcontrib>TAENZLER, RICHARD</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>RAAB, GUDRUN</au><au>RAAB, GUENTER</au><au>MAURER, ALEXANDER DR</au><au>SCHMITT, REINHOLD</au><au>SCHOBER, DETLEV</au><au>TAENZLER, RICHARD</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Process for preparation of hydroxyapatite</title><date>1994-04-06</date><risdate>1994</risdate><abstract>Die Erfindung betrifft ein Verfahren zur Herstellung eines Hydroxylapatits, welcher als Zahnputzkörper geeignet ist, durch Fällung aus wässriger Phosphorsäure und Calciumhydroxidlösung, wobei man eine Calcium-dotierte Phosphorsäurelösung mit einer Suspension von Calciumhydroxid/oxid in einem dem Hydroxylapatit entsprechendem Molverhältnis von Ca:P = 1,667 gleichzeitig einem Intensivmischorgan zuführt und dort bei Fällungstemperaturen von 60 - 100°C, vorzugsweise 80 - 90°C, und einem pH-Wert von 4 - 8, vorzugsweise von 6,5 - 7,5, umsetzt.
A process for the preparation of a hydroxyapatite, which is suitable as a tooth-cleaning substance, by precipitation from aqueous phosphoric acid and calcium hydroxide solution, in which a calcium-doped phosphoric acid solution is fed to an intensive mixer with a suspension of calcium hydroxide/oxide in a molar ratio of Ca:P=1.667 corresponding to the hydroxyapatite of and reacted there at precipitation temperatures of 60 DEG -100 DEG C., preferably 80 DEG -90 DEG C. and a pH of 4-8, preferably of 6.5-7.5. Also disclosed in a tooth-cleaning substance containing the hydroxyapatite.</abstract><edition>5</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOUNDS THEREOF DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM DYEING OR PRINTING TEXTILES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR HUMAN NECESSITIES HYGIENE INORGANIC CHEMISTRY LAUNDERING MEDICAL OR VETERINARY SCIENCE METALLURGY NON-METALLIC ELEMENTS PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS TEXTILES TREATMENT OF TEXTILES OR THE LIKE |
| title | Process for preparation of hydroxyapatite |
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