Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of water-soluble palladium nitrate

A palladium nitrate, water-soluble technology, applied in the field of preparation of water-soluble palladium nitrate, can solve the problems of uncontrollable palladium content, no water solubility of palladium nitrate compound, etc., achieve batch continuous production, good water solubility, and short production cycle short effect

Active Publication Date: 2017-01-18
KUNMING RONGGUI ELECTRONICS MATERIALS
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the precious metal water-soluble palladium nitrate compound has no water solubility and cannot control its palladium content, the invention provides a preparation method of water-soluble palladium nitrate, which realizes short production cycle, low cost, no environmental pollution, good water solubility, palladium stable content

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
  • Preparation method of water-soluble palladium nitrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dissolve palladium with nitric acid first to obtain a palladium nitrate solution. According to 12% of the total mass of the palladium nitrate solution, add a preparation agent in the palladium nitrate solution to heat and concentrate until the palladium nitrate solution has a concentration of 80g / L and a pH value of 80g / L. Less than 1, obtain the palladium nitrate solution of high concentration; To ensure production efficiency; Wherein, preparation agent is by the mixture of acetone and hydrogen peroxide by 3:7 mass ratio;

[0025] (2) Use spray drying equipment to spray crystallize the high-concentration palladium nitrate solution obtained in step (1). The spray drying temperature is 80°C, and the feed rate is 100mL / h, that is, a stable water-soluble solution with a palladium content of 40% is obtained. palladium nitrate.

[0026] The nozzle of the spray drying equipment is made of polytetrafluoroethylene; the diameter of the nozzle is 0.5mm.

[0027] During the s...

Embodiment 2

[0029] (1) Dissolve palladium with nitric acid first to obtain a palladium nitrate solution. According to 12% of the total mass of the palladium nitrate solution, add a preparation agent to the palladium nitrate solution for heating and concentration until the palladium nitrate solution has a concentration of 90g / L and a pH value of 90g / L. Less than 1, obtain the palladium nitrate solution of high concentration; To ensure production efficiency; Wherein, preparation agent is by the mixture of acetone and hydrogen peroxide by 3:7 mass ratio;

[0030] (2) Use spray drying equipment to spray crystallize the high-concentration palladium nitrate solution obtained in step (1). The spray drying temperature is 100°C, and the feed rate is 400mL / h, so that a stable water-soluble solution with a palladium content of 39% is obtained. palladium nitrate.

[0031] The nozzle of the spray drying equipment is made of polytetrafluoroethylene; the diameter of the nozzle is 1mm.

[0032] During t...

Embodiment 3

[0034] (1) Dissolve palladium with nitric acid first to obtain a palladium nitrate solution. According to 12% of the total mass of the palladium nitrate solution, add a preparation agent to the palladium nitrate solution for heating and concentration until the palladium nitrate solution has a concentration of 90g / L and a pH value of 90g / L. Less than 1, obtain the palladium nitrate solution of high concentration; To ensure production efficiency; Wherein, preparation agent is by the mixture of acetone and hydrogen peroxide by 3:7 mass ratio;

[0035] (2) Use spray drying equipment to spray crystallize the high-concentration palladium nitrate solution obtained in step (1). The spray drying temperature is 120°C, and the feed rate is 800mL / h, so that a stable water-soluble solution with a palladium content of 38.5% is obtained. palladium nitrate.

[0036] The nozzle of the spray drying equipment is made of polytetrafluoroethylene; the diameter of the nozzle is 2mm.

[0037] During...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of water-soluble palladium nitrate. The method comprises the steps that palladium is dissolved with nitric acid to obtain a palladium nitrate solution, a blending agent is added into the palladium nitrate solution in proportion, heating concentration is conducted, the concentration and pH value of palladium in the palladium nitrate solution are regulated, and a high-concentration palladium nitrate solution is obtained; spray crystallization is conducted in the high-concentration palladium nitrate solution, and then the water-soluble palladium nitrate is obtained. According to the preparation method of water-soluble palladium nitrate, a Pd(NO3)2.nH2O crystal which is stable in Pd content and good in water solubility and has the aqueous solution stability longer than or equal to 8 hours is prepared, the product is stable in property, good in consistency and convenient to transport and store, the use requirement of a catalyst precursor is met, and the conditions that at present, a Pd(NO3)2.nH2O crystal has no water solubility and is difficult to use are changed.

Description

technical field [0001] The invention relates to a preparation method of water-soluble palladium nitrate, belonging to the technical field of metal compound preparation. Background technique [0002] With the continuous development of my country's manufacturing level, the requirements for the selectivity, stability and catalytic activity of palladium catalysts are also increasing. Palladium compound products commonly used as precursors are mainly palladium chloride and palladium nitrate. Wherein palladium chloride is mainly used in the precursors of palladium catalysts such as dichlorodiammine palladium, dichlorotetraammine palladium, palladium chloride itself also has catalytic performance, can be directly used as catalyst; palladium chloride product is solid, easy to use and Transportation, the research and development of its preparation process started earlier in China, the preparation process is mature, the quality and batch stability are easier to control, and a unified...

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): C01G55/00
CPCC01G55/00
Inventor 张维峰郑恩华李雄覃龙张凯
Owner KUNMING RONGGUI ELECTRONICS MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com