Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for recycling palladium chloride from waste palladium catalyst

A technology of palladium catalyst and palladium chloride, applied in the direction of improving process efficiency, etc., can solve the problems of inapplicability to industrial production, and achieve the effects of high recovery rate, mild conditions and continuous process

Active Publication Date: 2018-08-03
LIANYUNGANG DUXIANG CHEM
View PDF13 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method is simple to operate, high temperature and high pressure are not suitable for industrial production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for recycling palladium chloride from waste palladium catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1, a kind of method that reclaims palladium chloride from waste and old palladium catalyst, the method steps are as follows:

[0025] (1) fine grinding: the spent palladium catalyst is finely ground to a particle size of -0.125mm;

[0026] (2) Acid dissolution: add the spent palladium catalyst particles into the inorganic acid solution, and adjust the concentration of the acid to 0.1M; a mixed solution is obtained;

[0027] (3) Extraction: Add the mixed solution into the extractant ionic liquid mixed solution, shake, centrifuge, and remove the water layer; the ionic liquid mixed solution is composed of 1-propyl-3-methylimidazole bromide and 1-propyl- 3-Methylimidazole bis(trifluoromethanesulfonyl)imide, wherein the concentration of 1-propyl-3-methylimidazole is 0.05M, 1-propyl-3-methylimidazole bis(trifluoromethanesulfonyl) The concentration of amido)imide is 0.8M;

[0028] (4) Stripping: add an appropriate amount of HBF to the ion mixture 4 , shaking, cen...

Embodiment 2

[0032] Embodiment 2, a kind of method that reclaims palladium chloride from waste and old palladium catalyst, the method steps are as follows:

[0033] (1) fine grinding: the spent palladium catalyst is finely ground to a particle size of -0.125mm;

[0034] (2) Acid-dissolving: the spent palladium catalyst particles are added in the inorganic acid solution, and the concentration of the acid is adjusted to 4M; a mixed solution is obtained;

[0035] (3) Extraction: Add the mixed solution into the extractant ionic liquid mixed solution, shake, centrifuge, and remove the water layer; the ionic liquid mixed solution is composed of 1-propyl-3-methylimidazole bromide and 1-propyl- 3-methylimidazole bis(trifluoromethanesulfonyl)imide composition, wherein the concentration of 1-propyl-3-methylimidazole is 0.3M, 1-propyl-3-methylimidazole bis(trifluoromethanesulfonyl) The concentration of imide is 1.2M;

[0036] (4) Stripping: add an appropriate amount of HBF to the ion mixture 4 , s...

Embodiment 3

[0040] Embodiment 3, a kind of method that reclaims palladium chloride from waste and old palladium catalyst, the method steps are as follows:

[0041] (1) fine grinding: the spent palladium catalyst is finely ground to a particle size of -0.125mm;

[0042] (2) Acid dissolution: add the spent palladium catalyst particles into the inorganic acid solution, and adjust the concentration of the acid to 0.5M; a mixed solution is obtained;

[0043] (3) Extraction: Add the mixed solution into the extractant ionic liquid mixed solution, shake, centrifuge, and remove the water layer; the ionic liquid mixed solution is composed of 1-propyl-3-methylimidazole bromide and 1-propyl- 3-methylimidazole bis(trifluoromethanesulfonyl)imide composition, wherein the concentration of 1-propyl-3-methylimidazole is 0.2M, 1-propyl-3-methylimidazole bis(trifluoromethanesulfonyl) The concentration of imide is 0.9M;

[0044] (4) Stripping: add an appropriate amount of HBF to the ion mixture 4 , shaking...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for recycling palladium chloride from a waste palladium catalyst. The method comprises the following steps: finely grinding the waste palladium catalyst till the granularity is -0.125 mm; dissolving the waste palladium catalyst in acid to obtain a mixed solution; adding the mixed solution into an extracting agent and ionic liquid mixed solution, and performing oscillation and centrifugation to remove a water layer; adding a proper amount of HBF4 into the ionic mixed solution for reverse extraction, performing oscillation and centrifugation, and collecting a water layer to obtain a palladium chloride aqueous solution; and performing concentration and drying to obtain palladium chloride. The method disclosed by the invention is applicable to waste palladium / carbon or palladium / aluminum oxide catalyst; a purification and recycling technology which takes environmentally-friendly and pollution-free ionic liquid as an extracting agent has the advantages of high recycling rate, a continuous process, mild conditions, simple operation, environmental friendliness and the like. Verification finds that the recycling rate can be up to 96 percent or above, and the purity of a recycled product is more than 99 percent.

Description

technical field [0001] The invention relates to the technical field of catalyst recovery and precious metal chemical industry, in particular to a method for recovering palladium chloride from waste palladium catalysts. Background technique [0002] Palladium is one of the members of the platinum group metal elements. It plays an indispensable role in military high-tech fields such as aerospace, aviation, and navigation, as well as in the automobile manufacturing industry. Therefore, all industrialized countries in the world regard metal palladium as an important element in national defense construction. "Strategic Material". In my country, the resources of palladium are very limited, the price is very expensive, and the demand is increasing year by year. It is mainly used in the manufacture of catalysts in the chemical field, especially in the synthesis of some pharmaceutical intermediates. rate plays an important role. In addition, under the important policy of the country...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B3/06C22B3/40C22B7/00
CPCC22B7/007C22B7/009C22B11/048C22B3/406Y02P10/20
Inventor 马肃王川民郑晓斌罗树琪
Owner LIANYUNGANG DUXIANG CHEM