Method for generating metallic ruthenium or ruthenium compounds from solids containing ruthenium

A technology of ruthenium compounds and metal ruthenium, applied in the field of volatile ruthenium compounds, can solve problems such as uneconomical recovery

Inactive Publication Date: 2010-02-24
BAYER MATERIALSCIENCE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The very low proportion of ruthenium in the sand makes the recovery of ruthenium uneconomical in this case

Method used

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  • Method for generating metallic ruthenium or ruthenium compounds from solids containing ruthenium
  • Method for generating metallic ruthenium or ruthenium compounds from solids containing ruthenium
  • Method for generating metallic ruthenium or ruthenium compounds from solids containing ruthenium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Embodiment 1: Preparation comprises the solid of ruthenium compound

[0084] In order to be able to illustrate the present invention, first prepare the containing supported on SnO 2 or TiO 2 Shaped bodies of ruthenium compounds.

[0085] Embodiment 1a: use 9.99g ruthenium chloride n hydrate in 33.96ml H 2 solution in O to impregnate 200 g of SnO 2 Molded body (spherical, about 1.9mm in diameter, 15wt% Al 2 o 3 Adhesive, Saint-Gobain), then mixed for 1 hour. The wet solid was then dried in a muffle furnace (air) at 60°C for 4 hours and then calcined at 250°C for 16 hours.

Embodiment 1b

[0086] Embodiment 1b: with 12g ruthenium chloride n-hydrate in 40.8ml H 2 solution in O to impregnate 200 g TiO 2 Pellets (cylindrical, about 2 mm in diameter, 2-10 mm in length, Saint-Gobain) were then mixed for 1 hour. The damp shaped body thus obtained was dried overnight at 60° C. and introduced dry under nitrogen flushing into a solution of NaOH and 25% hydrazine hydrate solution in water and allowed to stand for 1 hour. Excess water was then evaporated off. The damp shaped body was dried at 60° C. for 2 hours and then washed with 4×300 g of water. The moist shaped body thus obtained was dried in a muffle furnace (air) at 120° C. for 20 minutes and then calcined at 350° C. for 3 hours.

Embodiment 2

[0087] Example 2: Effects of Carbon Monoxide, Hydrogen Chloride and Oxygen on the Transfer of Ruthenium Compounds

[0088] 4 x 1 g of shaped bodies from Example 1a were placed in a fused silica reaction tube (diameter 10 mm), heated to 330° C., in each case 1 l / h hydrogen chloride, 4 l / h oxygen, 5 l / h Gas mixture 1 (10 l / h) consisting of nitrogen is passed until 16 hours (conditioning phase), then different gas mixtures are passed at 200 °C (2a-b) or 330 °C (2c-e) to form volatile ruthenium compounds (transfer phase). The parameters of the transfer phase are shown in Table 2a.

[0089] Table 2a: Parameters of the transfer phase

[0090]

[0091] After the transfer phase, the discoloration of the shaped bodies and the formation of characteristic deposits in the cooler area downstream of the reactor were evaluated as indicators for the volatilization of the ruthenium compound (Table 2b).

[0092] Table 2b: Discoloration of shaped bodies; characteristic deposits in cooler...

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Abstract

The present invention relates to a process for mobilizing metallic ruthenium or ruthenium compounds from solids to form volatile ruthenium compounds by means of a gas stream containing a hydrogen halide and carbon monoxide, preferably hydrogen chloride and carbon monoxide, and for isolating the previously mobilized ruthenium compounds, preferably by deposition with cooling, e.g. in relatively coldzones, in particular on relatively cold surfaces, absorption in suitable solutions or adsorption on suitable support materials.

Description

[0001] related application [0002] This application claims priority from German Patent Application No. 10 2008039278.2 filed on 22.08.2008, which is hereby incorporated by reference in its entirety for all applicable purposes. technical field [0003] The present invention relates to the transfer of metallic ruthenium or ruthenium compounds from solids to form volatile ruthenium compounds by means of a gas stream comprising hydrogen halides and carbon monoxide, preferably hydrogen chloride and carbon monoxide, and preferably by cooling deposition (e.g. in cooler regions, especially On cooler surfaces), absorption in a suitable solution or adsorption on a suitable support material to separate previously transferred ruthenium compounds. Background technique [0004] A typical field of application for solids comprising metallic ruthenium or ruthenium compounds is their use as catalysts for the production of chlorine gas by thermal gas-phase oxidation of hydrogen chloride with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B11/00B01J23/46
CPCC22B11/025C22B11/06C22B11/026Y02P10/20C22B7/00C22B61/00
Inventor T·施米特T·洛登肯珀F·格哈茨W·米勒
Owner BAYER MATERIALSCIENCE AG
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