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Method for production of cesium salt

A kind of cesium salt, said technology, applied in the field of purification of cesium compounds, can solve problems such as the corrosion effect of drilling equipment materials

Inactive Publication Date: 2003-04-23
CABOT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the cesium compound produced by the above method cannot avoid the side reaction precipitation formed between the bivalent and polyvalent cation impurities and the carbonate present in the drilling environment, or the corrosion of drilling equipment materials caused by sulfate ion impurities problem of effect

Method used

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  • Method for production of cesium salt
  • Method for production of cesium salt
  • Method for production of cesium salt

Examples

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Embodiment 1

[0127] This embodiment illustrates application of a method of the present invention to produce cesium formate through one-step reaction and to purify cesium formate.

[0128] Take a 4-liter glass beaker and fill it with 444 grams of cesium garnet ore powder ground to a nominal -200 mesh, 670 milliliters of water, and 310 milliliters of 98% (by weight) sulfuric acid. This represents an excess of approximately 82% acid over the stoichiometric amount required to dissolve alkali metals and aluminum from the ore. The mixing was continued while heating the mixture at about 115°C for 16 hours. Add water to maintain extraction volume.

[0129] After 16 hours, the slurry was diluted with water to a volume of 2200 ml, heated to about 80-90°C, and then cooled to room temperature. Decant 940 ml of clear liquid to remove most of the remaining unreacted sulfuric acid. Then add 900 milliliters of water to re-beat the waste ore and crystallized cesium alum, and then heat the re-beating sol...

Embodiment 2

[0146] Present embodiment also illustrates the process of applying the method of the present invention to produce cesium formate and purifying cesium formate.

[0147] Take a 4-liter glass beaker and put 444 grams of ground-200 mesh powdered cesium garnet, 670 milliliters of water, and 310 milliliters of 98% (weight) sulfuric acid. The mixture was mixed and heated to about 115°C for 16 hours. Add water to maintain extraction volume.

[0148] After 16 hours, the slurry was diluted with water to a volume of 2200-2500 ml, reheated, and then cooled to room temperature. The supernatant 1135 ml was decanted to remove most of the remaining sulfuric acid. Then add 800 milliliters of water to re-beat the remaining cesium alum and waste ore, and heat to about 70°C under stirring.

[0149] Then add the slaked lime slurry prepared by 150 grams of calcium oxide in 500 milliliters of water, and the resulting pH value is 7-8. The slurry was mixed at 90°C for 1.5 hours and cooled to 60°C....

Embodiment 3

[0167] The present embodiment illustrates the process of utilizing the inventive method to produce cesium sulfate and purify cesium sulfate.

[0168] Get 4 liters of glass beakers, put into 444 grams and grind into a 200 mesh powdery cesium garnet, 670 milliliters of water, 310 milliliters of 98% (weight) sulfuric acid. The mixture was mixed and heated to about 115°C for 16 hours. Add water to maintain the extraction volume so that the solid-to-liquid ratio is maintained at an acceptable level. After 16 hours, the slurry was diluted with water to a volume of 1800 ml, reheated, and then recooled to room temperature. Decant 960 ml of the clear liquid to remove most of the remaining sulfuric acid. Then add about 1000 milliliters of water to re-beat the remaining cesium alum and waste ore, then heat the re-beating slurry under stirring, and then heat to about 80°C. Take slaked lime slurry consisting of 160 grams of calcium oxide and about 300 milliliters of water, and add it to...

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Abstract

Disclosed is a process for purifying a cesium compound which includes an ionic impurity comprising: calcium, sulfate, magnesium or mixtures thereof comprising: reacting impurities comprising calcium, sulfate, magnesium or mixtures thereof in a solution including the solubilized starting cesium compound with suitable precipitating agents to form an insoluble precipitate including the impurity or impurities. Preferred precipitating agents include barium ion to precipitate sulfate ionic impurities as barium sulfate; hydroxyl ion to precipitate magnesium ionic impurities as magnesium hydroxide and to precipitate calcium ionic impurities as calcium hydroxide; and carbon dioxide or carbonate ion to precipitate calcium ionic impurities as calcium carbonate. Also disclosed is a process for producing a predetermined cesium compound. The process comprises treating a cesium-including material with a suitable reagent to dissolve at least a portion of the cesium contained in the material and form a slurry; adding a base comprising slaked lime or calcium carbonate and, if necessary to produce the desired cesium compound, an acid including the anion of the predetermined cesium compound to the slurry comprising the dissolved cesium; and separating the predetermined cesium compound. A drilling fluid or heavy medium separation fluid comprising a purified cesium compound and having a specific gravity of between about 1.2 g / cm<3> and about 2.5 g / cm<3> and having less than 85 % by weight of the predetermined cesium compound on a solution basis is also disclosed.

Description

field of invention [0001] The invention relates to a method for purifying cesium compounds. The invention also relates to processes for the production or recovery of cesium from cesium-containing materials, preferably in the form of a desired cesium compound, such as a cesium salt. Background of the invention [0002] Some processes for recovering cesium in the form of cesium compounds from cesium-containing materials, such as cesium garnet and other cesium-containing raw materials, are reported in the technical literature. [0003] One reported method involves leaching ground cesium garnet ore with concentrated sulfuric acid to obtain an extract containing cesium alum, which is recovered by crystallization. [0004] Cesium phosphorous is a hydrated cesium aluminum sulfate. Its chemical formula can be empirically expressed as CsAl(SO 4 )·12H 2 O, or Cs 2 SO 4 ·Al 2 (SO 4 ) 3 24 hours 2 O. Cesium alum contained in cesium garnet sulfuric acid extract or cesium alum ...

Claims

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Application Information

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IPC IPC(8): C01D17/00C07C51/41C07F1/00C09K8/04C09K8/16
CPCC07C51/412C09K8/16C01D17/00C07C53/06C07C53/10
Inventor 巴特·F·巴克帕特里克·M·布朗迈克尔·C·诺思拉普
Owner CABOT CORP
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