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Metal ion anti oxygen passivating agent
2017-12-31 19:00:08
Metal ion anti oxygen passivating agent
Two subsalicylic two amines and oxamides are typical metal ions anti oxygen passivating agents for polypropylene. At present, metal ions anti oxygen passivating agents are mainly composed of two salicylic two amines. According to their development trend, multifunctional is the main feature.
Functional metal ion anti oxygen passivating agents are mostly bonded with blocked phenolic functional groups, and they also endow the products with resistance to copper and heat and oxygen aging. The representative varieties are IrganoxMD1024 and NouguardXL-1.
Oxamides (oxamide), also known as oxalic acid two amides, code OA. It used to be synthesized with oxalic acid and amide, and the cost is too high. Now to the plastics industry by-product acid as raw material, as a contact agent with copper nitrate, direct synthesis in low temperature 50 to 80 DEG C, the cost is low, product purity can reach 99%.
Oxamides are colorless crystals or powders. Relative density 1.667g/cm3. The melting point is 419 degrees centigrade. It dissolves in water and is insoluble in ethanol and ether. No hygroscopic. It can be decomposed into ammonia and carbonic acid. With hot water can generate ammonium oxalate. Under the condition of heating and reaction of cyanide phosphorus pentoxide. By two oxalic acid with ethyl ammonia effect prepared.
Metal ions are ions of a metal element that is dissolved in water. It is simply a metal element in a substance made up of a molecule. Most of the metal ions are cations, but IVB-VIII metals can produce anions. Metal ions are important components to maintain the permeation balance of the multiphase system, and also a necessary part of the extensive enzyme reaction. The catalytic activity of some enzymes, in addition to the protein part, also needs metal ions, that is, metal ions are part of the enzyme activity center.
Some of the enzymes in the molecule do not contain metal, but they need metal ions to activate. The metal ion is the enzyme cofactor or activator of metal ions through changes in its valence electron transfer to the organism, complete oxidation reduction reaction, also need a metal ion in the maintenance of water and electrolyte balance and other aspects of the organism.
Metal passivating agent is the additive of gasoline, jet fuel and so on. It is often shared with anti - oxygen and glue - proof agents. It is used to inhibit the catalytic action of metal, especially copper on the oxidation of oil, so as to give full play to the role of anti oxygen and anti glue agent and reduce the dosage of anti oxygen and anti glue agent.
It is commonly used for carbonyl condensation of amine, such as N, N '- two, -1 and 2- propyl two amine. Metal passivator can react with metal ions to form chelates and make the metal in the passivation state of loss promoting oxidation. The amount of addition is about 0.0003 - 0.001% (weight).
Metal passivation technology is based on the effective components of metal passivating agent, which will react with the raw oil into the reactor and react with harmful metals on the catalyst surface, so as to slow down and inhibit the pollution caused by harmful metals to the catalyst. This effect is to change the existing forms of the valence state of contaminated metals by creating new phases and replacing lattice with polluting metals, so as to achieve the purpose of passivation. The method of using metal passivating agent to reduce the pollution of the harmful metal to the catalyst is less investment and flexible in operation, which has been widely used.
Triphenyl phosphite (antioxidant, stabilizer TPPi)
Packing method: net weight of 200KG/galvanized iron bucket (a small cabinet to hold 16 tons), 1000KG/IB (a small container with 18 tons) or 23 tons of it.
Port of shipment: Shanghai port
Price quotation validity: 15 days
Warehouse time: within 15 days (customs clearance)
Export rights: our own right to import and export.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent.
The core problem of blunt nickel is to inhibit the dehydrogenation activity of low price nickel. The present research shows that the active components of the passivating agent are different, and the degree of reducing the nickel pollution and reducing the hydrogen yield is also different. There are several methods for blunt nickel:
A blunt nickel component is formed with nickel to form an alloy. Antimony based NICKEL PASSIVATOR and the regeneration conditions by about 700 DEG C, generate oxidizing atmosphere, the compounds can be reduced into an alloy under the reaction conditions, through the formation of chemical bonds between the metal in, reduce the ease of the reduction of nickel, nickel prices stable state, the strong inhibition of nickel dehydrogenation activity reached the purpose of passivation of nickel.
The blunt nickel component forms a stable compound with the high valence nickel. For example, the use of boron oxide and nickel oxide to form nickel borate, which is not easily reduced under the regenerated condition of FCC, maintains the oxidation state of nickel and inhibits dehydrogenation activity of low price nickel.
The blunt nickel component is substituted with the lattice of nickel. According to the frontier orbit theory, when the reaction conditions of FCC react, the higher the energy of the electron and the lowest energy orbit of the orbit, the harder the reaction is, the harder it is to restore. The dehydrogenation activity of low valence nickel is reduced by the substitution of the lattice of blunt nickel and high valence nickel, which reduces its reduction degree.
Inhibition of the formation of five oxidation of two vanadium, the reduction of migration in the zeolite phase and the formation of vanadium acid are the core problems of blunt vanadium. The following methods can be adopted:
Tin, alkaline earth metal, rare earth and five oxidizing two vanadium reacted to produce a stable high melting point compound, which inhibited the migration of vanadium into the zeolite phase and the formation of vanadium acid.
The complexes formed by reaction of alkaline earth metals with weak acidic substances, as a blunted vanadium component, compete with molecular sieve to capture stable alkaline earth metal vanadate, inhibit the promotion of molecular sieve hydrolysis, and stabilize the structure of molecular sieve.
The transition metal compound is used to replace the lattice of vanadium, which improves the melting point of the phase and inhibits the migration of vanadium into the zeolite phase, so as to restrain the effect of vanadium pollution.
To sum up, the passivation mechanism of nickel and vanadium mainly focuses on the control principle of nickel valence state, the melting point of vanadium, and the lattice substitution of nickel and vanadium. However, there is still a lack of theoretical explanation for the difference in the reduction performance of different nickel containing compounds.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Two subsalicylic two amines and oxamides are typical metal ions anti oxygen passivating agents for polypropylene. At present, metal ions anti oxygen passivating agents are mainly composed of two salicylic two amines. According to their development trend, multifunctional is the main feature.
Functional metal ion anti oxygen passivating agents are mostly bonded with blocked phenolic functional groups, and they also endow the products with resistance to copper and heat and oxygen aging. The representative varieties are IrganoxMD1024 and NouguardXL-1.
Oxamides (oxamide), also known as oxalic acid two amides, code OA. It used to be synthesized with oxalic acid and amide, and the cost is too high. Now to the plastics industry by-product acid as raw material, as a contact agent with copper nitrate, direct synthesis in low temperature 50 to 80 DEG C, the cost is low, product purity can reach 99%.
Oxamides are colorless crystals or powders. Relative density 1.667g/cm3. The melting point is 419 degrees centigrade. It dissolves in water and is insoluble in ethanol and ether. No hygroscopic. It can be decomposed into ammonia and carbonic acid. With hot water can generate ammonium oxalate. Under the condition of heating and reaction of cyanide phosphorus pentoxide. By two oxalic acid with ethyl ammonia effect prepared.
Metal ions are ions of a metal element that is dissolved in water. It is simply a metal element in a substance made up of a molecule. Most of the metal ions are cations, but IVB-VIII metals can produce anions. Metal ions are important components to maintain the permeation balance of the multiphase system, and also a necessary part of the extensive enzyme reaction. The catalytic activity of some enzymes, in addition to the protein part, also needs metal ions, that is, metal ions are part of the enzyme activity center.
Some of the enzymes in the molecule do not contain metal, but they need metal ions to activate. The metal ion is the enzyme cofactor or activator of metal ions through changes in its valence electron transfer to the organism, complete oxidation reduction reaction, also need a metal ion in the maintenance of water and electrolyte balance and other aspects of the organism.
Metal passivating agent is the additive of gasoline, jet fuel and so on. It is often shared with anti - oxygen and glue - proof agents. It is used to inhibit the catalytic action of metal, especially copper on the oxidation of oil, so as to give full play to the role of anti oxygen and anti glue agent and reduce the dosage of anti oxygen and anti glue agent.
It is commonly used for carbonyl condensation of amine, such as N, N '- two, -1 and 2- propyl two amine. Metal passivator can react with metal ions to form chelates and make the metal in the passivation state of loss promoting oxidation. The amount of addition is about 0.0003 - 0.001% (weight).
Metal passivation technology is based on the effective components of metal passivating agent, which will react with the raw oil into the reactor and react with harmful metals on the catalyst surface, so as to slow down and inhibit the pollution caused by harmful metals to the catalyst. This effect is to change the existing forms of the valence state of contaminated metals by creating new phases and replacing lattice with polluting metals, so as to achieve the purpose of passivation. The method of using metal passivating agent to reduce the pollution of the harmful metal to the catalyst is less investment and flexible in operation, which has been widely used.
Triphenyl phosphite (antioxidant, stabilizer TPPi)
Packing method: net weight of 200KG/galvanized iron bucket (a small cabinet to hold 16 tons), 1000KG/IB (a small container with 18 tons) or 23 tons of it.
Port of shipment: Shanghai port
Price quotation validity: 15 days
Warehouse time: within 15 days (customs clearance)
Export rights: our own right to import and export.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent.
The core problem of blunt nickel is to inhibit the dehydrogenation activity of low price nickel. The present research shows that the active components of the passivating agent are different, and the degree of reducing the nickel pollution and reducing the hydrogen yield is also different. There are several methods for blunt nickel:
A blunt nickel component is formed with nickel to form an alloy. Antimony based NICKEL PASSIVATOR and the regeneration conditions by about 700 DEG C, generate oxidizing atmosphere, the compounds can be reduced into an alloy under the reaction conditions, through the formation of chemical bonds between the metal in, reduce the ease of the reduction of nickel, nickel prices stable state, the strong inhibition of nickel dehydrogenation activity reached the purpose of passivation of nickel.
The blunt nickel component forms a stable compound with the high valence nickel. For example, the use of boron oxide and nickel oxide to form nickel borate, which is not easily reduced under the regenerated condition of FCC, maintains the oxidation state of nickel and inhibits dehydrogenation activity of low price nickel.
The blunt nickel component is substituted with the lattice of nickel. According to the frontier orbit theory, when the reaction conditions of FCC react, the higher the energy of the electron and the lowest energy orbit of the orbit, the harder the reaction is, the harder it is to restore. The dehydrogenation activity of low valence nickel is reduced by the substitution of the lattice of blunt nickel and high valence nickel, which reduces its reduction degree.
Inhibition of the formation of five oxidation of two vanadium, the reduction of migration in the zeolite phase and the formation of vanadium acid are the core problems of blunt vanadium. The following methods can be adopted:
Tin, alkaline earth metal, rare earth and five oxidizing two vanadium reacted to produce a stable high melting point compound, which inhibited the migration of vanadium into the zeolite phase and the formation of vanadium acid.
The complexes formed by reaction of alkaline earth metals with weak acidic substances, as a blunted vanadium component, compete with molecular sieve to capture stable alkaline earth metal vanadate, inhibit the promotion of molecular sieve hydrolysis, and stabilize the structure of molecular sieve.
The transition metal compound is used to replace the lattice of vanadium, which improves the melting point of the phase and inhibits the migration of vanadium into the zeolite phase, so as to restrain the effect of vanadium pollution.
To sum up, the passivation mechanism of nickel and vanadium mainly focuses on the control principle of nickel valence state, the melting point of vanadium, and the lattice substitution of nickel and vanadium. However, there is still a lack of theoretical explanation for the difference in the reduction performance of different nickel containing compounds.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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