Diagram Analysis of Glycerol Dehydrating Reaction
There were two ways to dewater the glycerol: intermolecular dehydration to obtain diglycerol and polyglycerol, and intermolecular dehydration to obtain acrolene. In the gas-phase dehydration reaction system of glycerine, the reaction was related to the acidic nature of the catalyst. For example, the activity of Zirconium Phosphates prepared by the precipitations method was the highest in this system, which could make the conversion rate of glycerine reach 100% and the acrolein-like selectively reach 81%. In terms of biochemical reactions, the process of glycerase decomposing the tributyl-ester to obtain glycerol would release a certain amount of water. This process involved the production of glycerol and the loss of water. In addition, in the ninth step of the brewing of Xiaoqu liquor, under the catalyst of enolase, 2-Phosphoglyceric acid was dehydrated to form 2-Phosphoenol-Pyruvate (the reaction needed to be activated by M2 +). However, there was no graphic data on the reaction process of dehydration of glycerine, so no graphic analysis could be provided. Read more exciting novels for free
Analysis of the Dehydrating Reaction of Alcohol
There are many factors that affect the alcohol dehydration reaction. The reaction temperature had a significant effect on the alcohol dehydration reaction. Generally speaking, the higher the temperature, the more favorable it was for the formation of ethene, and the lower the temperature, the easier it was for ether to be formed. When the reaction temperature reached 120 ° C, the decrease in the reaction was probably due to the formation of ether from the dehydration of alcohol. Moreover, studies had shown that the reaction temperature for the large production of ethene should be maintained above 200 ° C. Otherwise, the alcohol would undergo molecular dehydration to form ether, thereby reducing the ethene's selectively. The catalyst could also affect the alcohol dehydration reaction. For example, in industrial production, the traditional concentrated sulfuric acid liquid phase was used for the dehydration of alcohol to produce ethene or ether, but there were equipment corrosion and environmental pollution problems. Therefore, many studies were currently focused on the development of new solid acid catalyst, such as ZSM - 5 molecular sieve, NKC -03a catalyst, al2o3 catalyst, etc. In some studies, different nano-composite catalyst also showed different selectively. For example, in the nitrogen carrier gas, the dehydration products (ethene and ether) were used at 500°C with the chromium-aluminum dioxide nano-composite material, and the conversion rate of alcohol was 74%. In the presence of an oxygen carrier gas, the main product was actually the esh, with a 38.5% selectively. The hematite-aluminum dioxide nano-composite emphasized the formation trend of the dehydration compound. At 500°C, the oxygen carrier gas (esh) had a 42% selectively, while the dehydrated product had a 32.8% selectively. In addition, in some special catalyst systems, such as the W03- x@C system where oxygen defects (OV) and carbon coating (PL) were introduced into W03, it was used for full-spectrum photocatalysis of alcohol dehydration. OV was used as a solid acid center, which was the key to using solar energy to catalyze the dehydration of alcohol to C2H4 through the photothermal process. In this system, the C2H4 selectively could reach 98.1%, and the conversion rate of C2H50H was 88%. There was also a catalyst system such as the platinum/Al2O3 @ TiAl-based catalyst system, which used a relay catalyst strategy of dehydration of alcohol to form ethene and then ethene to be oxided. First, the dehydration of alcohol by Al2O3, which was formed on the surface of the TiAl-based alloy without the deposit of platinum, was used. Due to the low disintegration energy of the C = C bond on the surface of the platinum catalyst (6.4 kcal/mole), ethene could be completely oxided on the surface of the platinum catalyst, thus achieving a special selective control. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diagram Analysis of Vulcanization Reaction
The principle of rubber curing was to heat a mixture of rubber and sulfur or other curing agents, so that the sulfur reacted with the double bonds in the rubber to form a cross-linked structure. During the operation of the flat-plate curing machine, the hot plate raises the temperature of the rubber compound and causes the rubber molecules to cross-link. Its structure changes from a linear structure to a net-shaped structure. This process can obtain products with certain physical and mechanical properties, but the rubber compound will begin to soften after being heated. At the same time, the moisture and volatile substances in the rubber compound will be vaporized. From a microscopic point of view, the rubber curing system had its own cross-linking mechanism. Peroxides were compounds containing O-O bonds. This peroxidic bond broke down when heated to produce free radical (the breaking of this bond was called homolytic cleavage because the two electrons in the bond were separated). This free radical had a high reaction activity and was the driving force behind the cross-linking of the compound. Peroxides undergo homolytic cleavage, forming two alkoxy free radical, which takes hydrogen atoms from the chain of the compound. The free radical of the two adjacent chains combine to form a carbon-carbon bond, which is an important feature of the cross-linking of peroxides. In these three steps, the one that determined the speed was the homolitic cleavage of the peroxide-based molecules, which usually took a few seconds to a few minutes (thermal dispersion was usually an important factor). After the formation of the highly active free radical, the next step of the reaction could be completed in a few seconds or even less. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction of Glycerol and Acid Acid
Glycerol (Glycerol) would react with the hydrogen difluoridation. From the chemical point of view, the acid was an acidic substance, which would produce hydrogen ions in the water solution. Glycerol contains a-OH group and has a certain chemical activity. When the two met, the hydrogen ions could interact with the hydrogen group in the glycerine. For example, an alkali-base neutralizing reaction or other substitution reactions might occur. However, the specific situation and degree of the reaction would also be affected by the reaction conditions (such as temperature, concentration, etc.). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Principle of Dehydrating Alcohol into Ether
The alcohol group was first protonated, and then the oxygen atom of the other alcohol group attacked the protonated carbon with a pair of electrons, causing an Sn2 reaction, and then deprotonated to give ether. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction after Dehydrating Cobalt Hydride
Cobalt dioxide would usually be formed after dehydration, and then it would be reduced by hydrogen at high temperatures. The result was not pure metal, but an alloy containing a small amount of hydrogen, because the metal had a certain ability to absorb hydrogen. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Diagram Analysis of Flux and Gold Plating
When analyzing the reaction mechanism between the flux and the gold plating layer, it was necessary to consider the situation of different bottom gold plating. For the mainstream method of nickel-based gold plating, during the welding process, the actual welding layer was related to the bottom layer of nickel-based alloy, that is, the tin alloy and nickel-based alloy formed a metal compound (Sn-Ni <2> compound). However, the purity of the gold-plated layer, the rate of voids, and the cleanliness of the surface directly affected the solderability of the contact body. When there was a nickel-plated bottom layer, the inertia of the nickel-plated part was higher than that of the gold-plated part, which could ensure a higher resistance to atmospheric corrosion. During welding, the flux and the bottom layer of nickel-plated part would have a smelting reaction, and the gold-plated layer might affect the welding process due to its own characteristics, but it was not the main reaction layer. As for the gold plating on the copper base, the copper base had a certain role in the welding. The copper ions easily penetrated into the gold coating and caused the gold coating to change color. Moreover, the copper coating was easy to be deactivated in the air and affected the cohesion of the gold coating. When the flux was in contact with the gold-plated layer of this structure, on the one hand, it had to deal with possible problems such as the possible oxidization of the copper surface to achieve good welding. On the other hand, the gold-plated layer was affected by the change of the copper layer and showed different solderability during welding. However, this method was rarely used at present. As for the silver plating, due to the lack of sufficient information, it was difficult to accurately analyze the reaction principle between the flux and it. It was only known that when the silver plating layer was contaminated, the black color would appear through the pores of the coating. This process was rarely used (except for special requirements). Generally speaking, when the flux was used in the welding process related to the gold-plated layer, it would be affected by the properties of the underlying metal under the gold-plated layer and the characteristics of the gold-plated layer (such as purity, voids, cleanliness, etc.). The reaction principle of the gold-plated layer and the flux with different underlying structures would have different performances in the welding process. The smelting change of the underlying metal during the welding was a more critical part, but the characteristics of the gold-plated layer could not be ignored. Under the joint action of many factors, the welding effect would be affected. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Formula of Copper Hydride and Glycerol
甘油即丙三醇，其与氢氧化铜反应有两种情况： 一是： \[ \begin{align*} &CH_{2}OH\\ &CH - OH + Cu(OH)_{2}=\\ &CH_{2}OH \end{align*} \begin{align*} &CH_{2}-O\\ &CH - O>Cu (两个氧连在同一个铜上)+2H_{2}O\\ &CH_{2}OH \end{align*} \] 二是丙三醇显酸性，和新制的氢氧化铜发生化学反应，生成蓝紫的丙三醇铜溶液，化学方程式如下： \(C_{3}H_{5}(OH)_{3}+Cu(OH)_{2}=C_{3}H_{6}O_{3}Cu + 2H_{2}O\)。 <a href="/?from=ask_words" style="color:red" target="_blank">点击前往免费阅读更多精彩小说</a>
Analysis of the reaction process diagram of reducing hydrogen and methyruvic acid
In the process of oxygen free breathing, the reduction of hydrogen and the reaction of Ruvic acid could produce actic acid. In addition, the reaction of Ruvic acid with the reduction of hydrogen could produce alcohol, but not Ruvic acid. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Diagram of the Inhibition Reaction
The principle of the inhibition reaction can be divided into competitive inhibition and non-competitive inhibition: 1. ** competitive inhibition **: A competitive inhibition agent will compete with the base for the active site of the protein, thereby suppressing the activity of the protein. In this case, both the initiator and the reagent could bind to the active site of the reagent. Due to the existence of the initiator, the chances of binding the reagent to the reagent were reduced, resulting in a decrease in the rate of the reaction. 2. ** Non-competitive Inhibition **: A non-competitive inhibition agent will bind to a site other than the active site of the protein, thereby suppressing the activity of the protein. This binding method changed the structure of the protein, which reduced the affinity of the active center of the protein to the protein. Even if the concentration of the protein increased, the reaction rate of the protein would not increase. For example, in the pesticide residue detection method, the target pesticide's inhibition of a specific reagent was an inhibition reaction. The specific reagent could catalyze the conversion of the reagent into a reagent when there was no pesticide. If the test sample contained the target pesticide, the pesticide would interact with the reagent to inhibit the activity of the reagent, thereby indirectly determining the level of pesticide residue in the sample. Also, in terms of whiteness, 4 -Butylated Resorcinol (577) mainly achieved whiteness and freckles by suppressing the activity of "Tyrosinase" and "Trp - 1." The inhibition of "Tyrosinase" may involve the principle of competitive or non-competitive inhibition. When constructing a nanoase sensor array to detect substances, for example, using 2D-MOF nanoase to detect phosphorus, the inhibition of phosphorus on the activity of 2D-MOF peroxide-like was also an inhibition reaction. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reaction Diagram of Oxidants and Reductants
When an oxidiser and a reducing agent react, the following relationship exists: the oxidiser obtains electrons, and the valency of the elements contained in it is reduced, resulting in a reduction reaction. The oxidiser itself is reduced to produce a reduction product; the reducing agent loses electrons, and the valency of the elements contained in it increases, resulting in an oxidiser reaction. The oxidiser itself is oxided to produce an oxidiser product. It could be simply represented by the following graph: |reactant| reaction type| Electronic gain and loss| change in valency| product| |----|----|----|----|----| |oxidizing agent| reduction reaction| de electronics| lower| reduzate| |reducing agent| oxidizing reaction| betatopic| rise| oxidative product| For example, in the reaction of burning carbon in oxygen (C + O ^== CO ^, ignition), carbon C is a reducing agent. It loses electrons, and its valency increases from 0 to +4, and is then oxided to carbon dioxide (as an oxided product). As an oxidiser, oxygen O ^is an oxidiser, and it gains electrons. Its valency decreases from 0 to-2, and it is reduced to oxygen in carbon dioxide (as a reduced product). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>