GB805517A - Improvements in or relating to a process for the preparation of phosphoric acid - Google Patents
Improvements in or relating to a process for the preparation of phosphoric acidInfo
- Publication number
- GB805517A GB805517A GB9745/57A GB974557A GB805517A GB 805517 A GB805517 A GB 805517A GB 9745/57 A GB9745/57 A GB 9745/57A GB 974557 A GB974557 A GB 974557A GB 805517 A GB805517 A GB 805517A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphoric acid
- organic solvent
- extract
- aqueous
- hydrochloric acid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
Calcium triphosphate is dissolved in aqueous hydrochloric acid, and the phosphoric acid produced is extracted by means of an organic solvent which has a limited miscibility with water. Organic solvents specified are alcohols, e.g. n-butanyl and iso-amyl alcohol, and ketones. Extraction may be effected continuously in co- or counter-current flow, or one or more times in a batch process. An excess of hydrochloric acid is preferably employed in the dissolution step; if less is employed, the organic solvent extract may be treated with aqueous hydrochloric acid so as to extract calcium therefrom. Phosphoric acid may be recovered from the organic solvent extract as an aqueous solution by the addition of an organic solvent miscible with the first solvent but immiscible with aqueous phosphoric acid, e.g. benzene. Hydrogen chloride may be removed from the aqueous phosphoric acid by distillation or stripping with air at a temperature of 80-90 DEG C. The two organic solvents may be separated by fractional distillation and separately recycled. The phosphoric acid may alternatively be recovered by directly subjecting the extract to distillation or stripping so as to remove solvent and hydrogen chloride. Tricalcium phosphate may be subjected to treatment in the form of phosphate rock which may be precalcined. Air may be passed through a hydrochloric acid solution of phosphate rock before organic solvent extraction in order to remove hydrogen fluoride.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL805517X | 1956-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB805517A true GB805517A (en) | 1958-12-10 |
Family
ID=11057271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9745/57A Expired GB805517A (en) | 1956-06-25 | 1957-03-25 | Improvements in or relating to a process for the preparation of phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB805517A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1261840B (en) * | 1961-12-06 | 1968-02-29 | Ministerul Ind Petrolului | Process for the production of highly concentrated phosphoric acids |
-
1957
- 1957-03-25 GB GB9745/57A patent/GB805517A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1261840B (en) * | 1961-12-06 | 1968-02-29 | Ministerul Ind Petrolului | Process for the production of highly concentrated phosphoric acids |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1426018A (en) | Recovery of acids from aqueous solutions | |
| GB1210446A (en) | Continuous process for the purification of phosphoric acid | |
| NO152371C (en) | PROCEDURE FOR THE PREPARATION OF ANCIENT OR APPROXIMATED Aqueous ACID | |
| ES280082A1 (en) | Process for the recovery of phosphoric acid from aqueous reaction mixtures produced by the decomposition of tricalcium phosphate with hydrochloric acid | |
| GB946322A (en) | Process for purifying 4,4 dihydroxydiphenylpropane 2,2 | |
| GB805517A (en) | Improvements in or relating to a process for the preparation of phosphoric acid | |
| ES426753A1 (en) | Purification of phosophoric acid by means of organic solvents | |
| GB1093927A (en) | Process for the preparation of purified phosphoric acid | |
| GB979275A (en) | A method of preparing polypeptide substance having antiphlogistic properties | |
| GB1063248A (en) | ||
| ES470068A1 (en) | Process for purifying phosphoric acid | |
| GB1082395A (en) | Process of preparing water-soluble phosphates | |
| GB1030727A (en) | Process for the continuous manufacture, purification and isolation of lactic acid | |
| GB1128104A (en) | A process for the production of concentrated phosphoric acid | |
| GB923463A (en) | Recovery of hexamethylphosphorictriamide | |
| GB1023889A (en) | Continuous process for extracting anhydrous hydrofluoric acid from its aqueous solutions | |
| GB1093926A (en) | Process for the preparation of purified phosphoric acid | |
| ES384740A1 (en) | Method to recover uranium in the course of phosphoric acid production from phosphate mineral. (Machine-translation by Google Translate, not legally binding) | |
| GB1209272A (en) | Cleaning of phosphoric acid | |
| GB1020071A (en) | Process for obtaining concentrated phosphoric acid | |
| GB1158402A (en) | Process for making Phosphoric Acid by the Wet Process | |
| GB1132657A (en) | Process for working up aqueous solutions containing a glycol ether and hexadienic acids | |
| FR2093372A5 (en) | Purification of wet-process phosphoric acid - by extraction - with part water-misc organic solvent | |
| GB797797A (en) | Process for recovering pure isophthalic and terephthalic acid | |
| GB848689A (en) | Recovery of lipids |