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Green synthesis method of palladium chloride

A green synthesis, palladium chloride technology, applied in chemical instruments and methods, ruthenium/rhodium/palladium/osmium/iridium/platinum compounds, inorganic chemistry, etc., can solve problems such as adverse effects on environmental protection and social stability, and inconsistent development goals , to achieve good promotion and application value, facilitate large-scale production, and save waste heat utilization

Inactive Publication Date: 2019-09-03
太仓南净源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the use of aqua regia in the process is extremely corrosive and dangerous, and a large amount of NO will be produced after the nitric acid is reduced during the nitric acid removal process 2 or NO and other acid gases, this gas is not only the main gas that causes acid rain, but also has certain toxicity and is the main air pollutant, while NO 2 It has a striking reddish brown color, which has a great adverse effect on local environmental protection and social stability, and is inconsistent with the development goals of an environmentally friendly and energy-saving society

Method used

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  • Green synthesis method of palladium chloride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like figure 1 , a kind of palladium chloride green synthetic method, comprises the steps:

[0029] The production of the crude product in step S1: adding the metal palladium powder in the reactor 1 with the dropping funnel at one time, and adding hydrochloric acid therein, stirring at a certain temperature, while stirring, passing through the dropping funnel to the reactor 1 gradually Add the aqueous solution of the oxidant dropwise, and finish the addition within 20 minutes. After the dropwise addition, continue the insulation reaction for 0.5 hours to obtain the crude product;

[0030] Step S2 tail gas treatment: the HCl gas 12 that may be volatilized during the production process of step S1 is passed into the tail gas absorption tower 2, and the tail gas is absorbed by spraying;

[0031] Step S3 vacuum distillation to remove water: the crude product produced in step S1 is added to the evaporator 3 for vacuum distillation operation, the slight excess of hydrochloric ...

Embodiment 2

[0041] like figure 1 , a kind of palladium chloride green synthetic method, comprises the steps:

[0042] The production of the crude product in step S1: adding the metal palladium powder in the reactor 1 with the dropping funnel at one time, and adding hydrochloric acid therein, stirring at a certain temperature, while stirring, passing through the dropping funnel to the reactor 1 gradually Add the aqueous solution of the oxidizing agent dropwise, and complete the addition within 23 minutes. After the dropwise addition is completed, continue the heat preservation reaction for 0.9 hours to obtain the crude product;

[0043] Step S2 tail gas treatment: the HCl gas 12 that may be volatilized during the production process of step S1 is passed into the tail gas absorption tower 2, and the tail gas is absorbed by spraying;

[0044] Step S3 vacuum distillation to remove water: the crude product produced in step S1 is added to the evaporator 3 for vacuum distillation operation, the ...

Embodiment 3

[0054] like figure 1 , a kind of palladium chloride green synthetic method, comprises the steps:

[0055] The production of the crude product in step S1: adding the metal palladium powder in the reactor 1 with the dropping funnel at one time, and adding hydrochloric acid therein, stirring at a certain temperature, while stirring, passing through the dropping funnel to the reactor 1 gradually Add the aqueous solution of the oxidizing agent dropwise, and complete the addition within 25 minutes. After the dropwise addition, continue the heat preservation reaction for 1.3 hours to obtain the crude product;

[0056] Step S2 tail gas treatment: the HCl gas 12 that may be volatilized during the production process of step S1 is passed into the tail gas absorption tower 2, and the tail gas is absorbed by spraying;

[0057] Step S3 vacuum distillation to remove water: the crude product produced in step S1 is added to the evaporator 3 for vacuum distillation operation, the slight excess...

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Abstract

The invention provides a green synthesis method of palladium chloride. The method includes: using metal palladium and hydrochloric acid as the reaction raw materials, adopting hydrogen peroxide as theoxidizing agent, controlling the process parameters: feed ratio, feeding rate, reaction time, oxidizing agent concentration, reaction temperature, etc., carrying out reaction, then removing water byreduced pressure distillation, and recycling water and hydrochloric acid water resources. The green synthesis method of palladium chloride disclosed by the invention has a green and environment-friendly technological process, and high technical content, effectively realizes energy saving, emission reduction, and green consumption reduction, and the product has high added value, belongs to one of the necessities of China's high-tech market, and has strong market and technological prospects.

Description

technical field [0001] The application relates to the technical field of catalyst preparation, in particular to a green synthesis method of palladium chloride. 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. At present, the palladium compound product commonly used as a precursor is mainly palladium chloride. Palladium chloride, the chemical formula is PdCl 2 , also known as palladium dichloride, is a reddish-brown crystalline powder, easily soluble in dilute hydrochloric acid, and exists stably in the air, and its dihydrate is a dark red hygroscopic crystal. This product is widely used in petrochemical industry, pharmaceutical industry, perfume industry, dye industry, electroplating industry, environmental waste water, waste gas, automobile exhaust purification and other fine chemicals, such as the preparation...

Claims

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Application Information

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IPC IPC(8): C01G55/00
CPCC01G55/005Y02P20/10
Inventor 彭璟马少玲雷仁华周爱成
Owner 太仓南净源科技有限公司
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