15

2023-11

How to choose the right chemical catalyst-stability

There are many kinds of chemical catalysts and their applications are extremely wide. The performance of different catalysts in the same reaction and even in the same device is also very different. So what kind of catalyst is a good chemical catalyst and how should it be evaluated? What indicators should be paid attention to when choosing a chemical catalyst? Generally speaking, the three comprehensive indicators of activity, selectivity and stability are mainly used to measure the quality and efficiency of a chemical catalyst. Also related to these three items are the mechanical strength, toxicity resistance, geometric physical properties, macroscopic and microscopic physical structures, and economic performance of the catalyst. A more comprehensive performance overview is shown in the table below.

2023-11-15

How to choose the right chemical catalyst-stability

15

2023-11

What are the selection criteria for nickel catalysts

At present, there are many nickel catalyst manufacturers in China, most of the small factories have weak technical strength and backward production process, and the quality of nickel catalyst products is greatly affected by human factors. Next, we will tell you the selection criteria for nickel-based catalysts. The quality control method of nickel-based catalyst is the activity test of the product, and there is still a lack of quality control of semi-finished products in the production process. Therefore, nickel catalyst users should choose those production process and equipment to win, product quality is stable, but also have the use of service conditions of the unit production of the best high-efficiency nickel catalyst. Generally, nickel catalysts with high activity, high load bearing, good strength, selectivity and good toxicity resistance should be selected.

2023-11-15

What are the selection criteria for nickel catalysts

15

2023-11

What are the uses of Raney nickel catalysts

Raney nickel catalyst as a spark, has been used in various industries, and has been well received by users. So what are the uses of Raney nickel catalysts? Let's tell you! This Raney nickel catalyst is mainly used in the catalytic hydrogenation reaction of basic organic chemical industry. Can be used for hydrogenation of organic carbon-hydrogen bonds, hydrogenation of carbon-nitrogen bonds, hydrogenation of nitroso compounds and nitro compounds

2023-11-15

What are the uses of Raney nickel catalysts

15

2023-11

How to use nickel catalyst reasonably

The deactivation of the nickel-based catalyst is greatly related to the conditions of its use. Excellent catalytic performance is the basis for the use of nickel-based catalysts, and good conditions of use are the guarantee of the quality of nickel-based catalysts. Today we will share with you how to use nickel catalysts reasonably.

2023-11-15

How to use nickel catalyst reasonably

15

2023-11

Problems needing attention in the selection of copper-based catalyst regeneration

Copper catalyst is also called coal, is a kind of only change the speed of the chemical reaction without changing the essence of the reaction, plays a very obvious acceleration. Next, we will introduce the problems that need to be paid attention to in the selection of copper catalyst regeneration. It is 1. to pay attention to whether the product performance after regeneration is stable or not. Due to the influence of various factors such as humidity and temperature in the air, the activity of the copper catalyst is lost and cannot continue to exert its effectiveness. The copper-based catalyst regeneration plant will temporarily lose the activity of the catalyst or collect some of the substances for recycling, although the possible regeneration of the catalyst in the service life can not reach the original level, but the performance still has good stability.

2023-11-15

Problems needing attention in the selection of copper-based catalyst regeneration

15

2023-11

What are the causes of catalyst deactivation and what should be paid attention to in industrial use

The chemical composition of the catalyst does not change before and after the chemical reaction, and the life of the catalyst is theoretically infinite. But in actual use, the catalyst has a certain life, and sometimes, the life is far shorter than imagined. Next, we will tell you the reasons for the deactivation of the catalyst and the matters needing attention during use.

2023-11-15

What are the causes of catalyst deactivation and what should be paid attention to in industrial use

15

2023-11

Several Causes of Deactivation of Hydrogenation Catalyst

Hydrogenation catalysts are affected by various factors during use, and will lose their activity sharply or slowly. Today, Xunkai Catalysis briefly introduces several reasons for the deactivation of hydrogenation catalysts. 1, permanent deactivation, hydrogenation catalyst active components by the role of some foreign components (poisoning) and lose activity, often permanent deactivation. Most of these foreign components are chemically reacted with the active components of the catalyst or ion exchange, resulting in changes in the active components. Deactivation of catalyst poisoning often manifests itself as a rapid decline in activity. Loss of active components due to wear or sublimation during use also leads to permanent deactivation, which is often difficult to recover simply.

2023-11-15

Several Causes of Deactivation of Hydrogenation Catalyst

15

2023-11

What are the main considerations when drying hydrogenation catalyst

What are the main considerations when drying hydrogenation catalysts? Let us tell you! 1. In order to release the water in the catalyst at a lower temperature, the pressure of the reaction system in the catalyst drying stage should be maintained at 1.5 MPa; 2. Under the condition that the compressor can reach, the gas agent ratio should be as large as possible, the temperature wave of the reaction bed layer advances quickly, the temperature distribution is uniform, and the water in the catalyst is removed quickly.

2023-11-15

What are the main considerations when drying hydrogenation catalyst

15

2023-11

Latest progress in m-xylylenediamine production: advanced process and high quality catalyst

M-xylylenediamine (MXDA) is an epoxy resin curing agent with excellent performance. It has the advantages of low temperature curing, heat resistance, water resistance, good chemical corrosion resistance, low viscosity, easy operation, etc. It can also be used in polyurethane, Polyamide, rubber additives, pesticides, fiber finishing agents, rust removers, chelating agents, lubricants, paper processing aids and electronic chemicals. It is a fine chemical with wide application and high added value. M-xylylenediamine is generally produced by catalytic hydrogenation of m-phthalonitrile. Domestic industrial production of m-xylylenediamine is still dominated by batch kettle reaction, with small production scale, fine catalyst particles, easy pulverization, poor separation effect, high production cost, poor safety and low degree of automation. Moreover, batch kettle reaction generally uses magnetic force or mechanical stirring, which makes it difficult to ensure sufficient hydrogen supply on the surface of the catalyst, resulting in too many central amine intermediates in the reaction liquid and too many by-products. Major international producers, such as Mitsubishi Gas of Japan, use trickle bed continuous production process, and BASF of Germany also uses fixed bed catalytic method. Raney nickel or modified Raney nickel is mainly used in batch reactions, and supported nickel-based catalysts are mostly used in fixed-bed processes.

2023-11-15

Latest progress in m-xylylenediamine production: advanced process and high quality catalyst

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2023-11

What are the factors that affect the use of copper catalysts?

The copper-based catalyst can not only improve the speed of product production through its own chemical properties, but also ensure that the quality of the product produced is not damaged in any way. But in the process of use, there are some factors that will affect its effect. So, what are the factors that affect the use of copper catalysts?

2023-11-15

What are the factors that affect the use of copper catalysts?
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