ALKALI-CONTAINING,CALCINED-PHOSPHATE FERTILISER AND PRODUCT SO OBTAINED
An alkaline high temperature process for the production of alkali containing highly citrate soluble calcined phosphate fertilizer is disclosed. The process comprises calcining a preheated mixture comprising a crude phosphate, an alkaline decomposing agent, silicic acid and phosphoric acid in a rotar...
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| creator | KASPERS H HAUSCHILD U ROETGER H |
| description | An alkaline high temperature process for the production of alkali containing highly citrate soluble calcined phosphate fertilizer is disclosed. The process comprises calcining a preheated mixture comprising a crude phosphate, an alkaline decomposing agent, silicic acid and phosphoric acid in a rotary kiln at a temperature of between about 900 DEG and 1300 DEG C. The preheated mixture is prepared by introducing phosphoric acid directly into the kiln and therein contacting it with the hot precursory mixture of the remaining starting material having a temperature of between about 150 DEG to 900 DEG C. The amounts of starting materials are preferably chosen such that in the mixture 1 mole of P2O5 is present per about 1.1 to 1.8 moles of alkali oxide, and about 0.5 moles of SiO2 are present per mole of CaO which is in excess of the amount of CaO which can be bound in the form of calcium alkali phosphate. |
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The process comprises calcining a preheated mixture comprising a crude phosphate, an alkaline decomposing agent, silicic acid and phosphoric acid in a rotary kiln at a temperature of between about 900 DEG and 1300 DEG C. The preheated mixture is prepared by introducing phosphoric acid directly into the kiln and therein contacting it with the hot precursory mixture of the remaining starting material having a temperature of between about 150 DEG to 900 DEG C. The amounts of starting materials are preferably chosen such that in the mixture 1 mole of P2O5 is present per about 1.1 to 1.8 moles of alkali oxide, and about 0.5 moles of SiO2 are present per mole of CaO which is in excess of the amount of CaO which can be bound in the form of calcium alkali phosphate.</description><edition>2</edition><language>eng</language><subject>CHEMISTRY ; FERTILISERS ; MANUFACTURE THEREOF ; METALLURGY ; PHOSPHATIC FERTILISERS</subject><creationdate>1979</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=19790131&DB=EPODOC&CC=ZA&NR=78920B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76516</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19790131&DB=EPODOC&CC=ZA&NR=78920B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KASPERS H</creatorcontrib><creatorcontrib>HAUSCHILD U</creatorcontrib><creatorcontrib>ROETGER H</creatorcontrib><title>ALKALI-CONTAINING,CALCINED-PHOSPHATE FERTILISER AND PRODUCT SO OBTAINED</title><description>An alkaline high temperature process for the production of alkali containing highly citrate soluble calcined phosphate fertilizer is disclosed. The process comprises calcining a preheated mixture comprising a crude phosphate, an alkaline decomposing agent, silicic acid and phosphoric acid in a rotary kiln at a temperature of between about 900 DEG and 1300 DEG C. The preheated mixture is prepared by introducing phosphoric acid directly into the kiln and therein contacting it with the hot precursory mixture of the remaining starting material having a temperature of between about 150 DEG to 900 DEG C. The amounts of starting materials are preferably chosen such that in the mixture 1 mole of P2O5 is present per about 1.1 to 1.8 moles of alkali oxide, and about 0.5 moles of SiO2 are present per mole of CaO which is in excess of the amount of CaO which can be bound in the form of calcium alkali phosphate.</description><subject>CHEMISTRY</subject><subject>FERTILISERS</subject><subject>MANUFACTURE THEREOF</subject><subject>METALLURGY</subject><subject>PHOSPHATIC FERTILISERS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1979</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHB39PF29PHUdfb3C3H09PP0c9dxdvRx9vRzddEN8PAPDvBwDHFVcHMNCvH08Qx2DVJw9HNRCAjydwl1DlEI9lfwdwJpc3XhYWBNS8wpTuWF0twMsm6uIc4euqkF-fGpxQWJyal5qSXxUY7mFpZGBk7GhOQBk0krIg</recordid><startdate>19790131</startdate><enddate>19790131</enddate><creator>KASPERS H</creator><creator>HAUSCHILD U</creator><creator>ROETGER H</creator><scope>EVB</scope></search><sort><creationdate>19790131</creationdate><title>ALKALI-CONTAINING,CALCINED-PHOSPHATE FERTILISER AND PRODUCT SO OBTAINED</title><author>KASPERS H ; HAUSCHILD U ; ROETGER H</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_ZA78920B3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1979</creationdate><topic>CHEMISTRY</topic><topic>FERTILISERS</topic><topic>MANUFACTURE THEREOF</topic><topic>METALLURGY</topic><topic>PHOSPHATIC FERTILISERS</topic><toplevel>online_resources</toplevel><creatorcontrib>KASPERS H</creatorcontrib><creatorcontrib>HAUSCHILD U</creatorcontrib><creatorcontrib>ROETGER H</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KASPERS H</au><au>HAUSCHILD U</au><au>ROETGER H</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>ALKALI-CONTAINING,CALCINED-PHOSPHATE FERTILISER AND PRODUCT SO OBTAINED</title><date>1979-01-31</date><risdate>1979</risdate><abstract>An alkaline high temperature process for the production of alkali containing highly citrate soluble calcined phosphate fertilizer is disclosed. The process comprises calcining a preheated mixture comprising a crude phosphate, an alkaline decomposing agent, silicic acid and phosphoric acid in a rotary kiln at a temperature of between about 900 DEG and 1300 DEG C. The preheated mixture is prepared by introducing phosphoric acid directly into the kiln and therein contacting it with the hot precursory mixture of the remaining starting material having a temperature of between about 150 DEG to 900 DEG C. The amounts of starting materials are preferably chosen such that in the mixture 1 mole of P2O5 is present per about 1.1 to 1.8 moles of alkali oxide, and about 0.5 moles of SiO2 are present per mole of CaO which is in excess of the amount of CaO which can be bound in the form of calcium alkali phosphate.</abstract><edition>2</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY FERTILISERS MANUFACTURE THEREOF METALLURGY PHOSPHATIC FERTILISERS |
| title | ALKALI-CONTAINING,CALCINED-PHOSPHATE FERTILISER AND PRODUCT SO OBTAINED |
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