RUBBER VULCANIZING ACCELERATOR·DPG (D) MODEL
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 12000 m.t./month
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RUBBER VULCANIZING ACCELERATOR-DPG(D)
Chemical Name: Diphenyl guanidine
Molecular Formula: C13H13N3
Molecular Weight：211.27
CAS NO。: 102-06-7
Executive standard：Q/CNPC55-2001
Specification
| Index | |
First-class products | Acceptable end-product | |
Appearance(Visual inspection) | white powder | Greyish-white powder |
Initial M.P, oC ≥ | 145.0 | 144.0 |
Loss on drying, % ≤ | 0.20 | 0.30 |
Ash, % ≤ | 0.30 | 0.40 |
Residues on 150μm sieve,% | 0.10 | 0.10 |
Residues on 63μm，% ≤ | 0.50 | 0.50 |
Properties: Grayish-white or white powder notaste, nontoxic . Density is 1.13--1.19. Soluble in acetone, ethyl acetate, benzene, alcohol, slightly soluble in carbon tetrachloride Insoluble in water and gasoline.
Application: mainly used for natural rubber syntheic the medium-speed accelerator. Used in thiazoles, Autumn Lamb, and the second category of iodine acid catalyst for the active agent, and agent for DM, TMTD used, can be used for continuous vulcanization. Mainly used in the manufacture of tires, plastic sheet, soles and industrial products, rigid and thick plastic products.
Packaging: Polypropylene knitted bags lined with polyethylene bags.Net weight 25kg per bag.
Storage: Keep container tightly closed in a cool, well-ventilated place. The recommended maximum storage life is 2 years when stored under normal conditions.
Note: The product could be oiled and pelleted apon customer request.
- Q:How does the chemical equation calculate the quality of the catalyst?
- So it is not included in the calculation
- Q:Why the amount of catalyst is too small will make the chemical reaction rate slowed down
- Whether the chemical reaction can be carried out according to the change of free energy, but only according to the change of free energy can not determine whether the reaction can be completed, because the chemical reaction is also completed by the reaction of the energy barrier, that is, if the reaction energy barrier is high, To provide some energy, across the barrier, to complete the reaction. The energy barrier is called activation energy. And the role of the catalyst is to reduce the activation energy, so that in a relatively harsh environment, chemical reaction occurs.
- Q:Will the chemical catalyst not reduce that?
- Why is it done? Although the catalyst does not react chemically, the catalyst itself is deteriorated and is not always used
- Q:Why the catalyst is required to have a large surface area and a rich pore structure
- In order to speed up the absorption, speed up the reaction rate
- Q:If possible can anyone give me information on the active site, substrates, products, and the energy of activation as part of the answer?Responses greatly appreciated! Thankss! 10pts to best answer!
- Catalysts help shift the equilibrium of a reaction to one that is more favorable. They allow a naturally occurring reaction that may be extremely slow to progress faster or an unfavorable reaction to proceed forward. During the process catalysts are recycled, which means that at the catalyst is the same compound in the beginning and the end of the reaction, although during intermediate steps catalysts can change conformation. Catalysts shift the equilibrium of a reaction by lowering the activation energy of a reaction, which is the energy barrier which must be overcome in order for the reaction to proceed in a desired direction. This can be achieved in several ways such as providing favorable thermodynamic conditions for a reaction or creating intermediates which react more favorably to create the products. Inside the cell a lot of chemical reactions are either too slow to proceed naturally or are simply unfavorable. Catalysts help overcome those barriers. The substrate is the part of the reaction which gets transformed into the products after binding to the active site of the protein.
- Q:What is the chemical nature of the enzyme?
- The difference between the enzyme and the general protein is that the enzyme is a protein with a special catalytic function. Similarly, the enzyme, like other proteins, consists mainly of amino acids, with one, two, three and quaternary structures, and the same enzyme as other proteins The composition of the enzyme can be divided into two types: simple protein and binding protein. Some enzymes are only protein, its activity depends on its protein structure, such enzymes are simple protein; other enzyme active ingredients in addition to containing protein, but also There are some small molecules that cofactor, the two together to be active, such enzymes belong to the binding protein.The protein part of the protein is called the enzyme protein, non-protein part called the cofactor
- Q:Pls help me define a catalyst.?
- In chemistry and biology, catalysis is the acceleration (increase in rate) of a chemical reaction by means of a substance, called a catalyst, that is itself not consumed by the overall reaction. The word is derived from the Greek noun κατ?λυσι?, related to the verb καταλ?ειν, meaning to annul or to untie or to pick up. A catalyst provides an alternative route of reaction where the activation energy is lower than the original chemical reaction. Catalysts participate in reactions but are neither reactants nor products of the reaction they catalyze. An exception is the process of autocatalysis where the product of a reaction helps to accelerate the same reaction. They work by providing an alternative pathway for the reaction to occur, thus reducing the activation energy and increasing the reaction rate. More generally, one may at times call anything that accelerates a reaction, without itself being consumed or changed, a catalyst (for example, a catalyst for political change). A good example of a catalyst is in the disproportionation of hydrogen peroxide. Hydrogen peroxide reacts to give water and oxygen gas by itself: 2 H2O2 → 2 H2O + O2 Usually, this reaction is slow. On the addition of manganese dioxide to a dilute solution of hydrogen peroxide, an effervescence is observed, and much oxygen, detectable by a glowing splint, is evolved. The manganese dioxide may be recovered, and re-used indefinitely, thus it is a catalyst — it is not consumed by the reaction. A promoter is an accelerator of catalysis, but not a catalyst by itself. An inhibitor inhibits the working of a catalyst.
- Q:What are the characteristics of the catalyst in the catalytic reaction?
- The role of the catalyst in the chemical reaction is to change the rate of chemical reaction, and its own quality and chemical properties do not change.
- Q:pls give one or two catalysts that are used in the industry for example:Rhodium catalyst in a catalytic converter of a car or the Iron catalyst for making ammoniaTHANKS :)
- i will tell you the hydrogen and carbonmonixide production in indsutry they will use alumina based nickel catalyst for adsorption of gases, at high temperature it will breaks as small molecules like hydrogen, co2, co,ch4, after they will separate them using carbon molecular seives as catalyst. another catalyst for hydrogenation of double bond is copper chromate for sulphur removal from disel and petrol they will use COMOX ( copper and molybdinum catalyst ) after then pass through zinc sulfide with hydrogen gas , the sulfur will removed as a hydrogen sulfide.
- Q:In the chemical reaction will have to use the catalyst reaction, such as H2O2 === (MnO2) H2O + O2 ↑, then the catalyst in the end to participate in the reaction (that is, the catalyst itself is the reactant) If so, why are some of these substances in the reaction (these substances refer to the catalyst) in the reaction after the quality and nature of the change does not change?
- The composition, chemical properties and quality of the catalyst itself do not change before and after the reaction; its relationship with the reaction system is as highly selective (or specific) as the relationship between the lock and the key. A catalyst does not catalyze all chemical reactions. For example, manganese dioxide catalyzes the thermal decomposition of potassium chlorate, accelerates the reaction rate, but does not necessarily have a catalytic effect on other chemical reactions. Some chemical reactions are not only the only catalyst, such as potassium chlorate can be thermally decomposed to catalyze the presence of magnesium oxide, iron oxide and copper oxide and so on.
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RUBBER VULCANIZING ACCELERATOR·DPG (D) MODEL
- Ref Price:
-
- Loading Port:
- Tianjin
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 25 m.t.
- Supply Capability:
- 12000 m.t./month
OKorder Service Pledge
Quality Product, Order Online Tracking, Timely Delivery
OKorder Financial Service
Credit Rating, Credit Services, Credit Purchasing
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