News Details
High temperature antioxidant additives
2018-1-8 15:50:51
High temperature antioxidant additives
Due to the improvement of mechanical design technology, the engine will be developed in the direction of high temperature, high speed and high output power. Therefore, it is necessary to develop and develop new high temperature antioxidant additives simply by adding ZDDP anti-oxygen corrosion inhibitor to meet the requirements of high temperature oxidation resistance of oil products.
Among them, the excellent control of oil sludge generation and the ability to control viscosity increase due to high thermal decomposition temperature can be used as high temperature antioxidant additives. Carbamate (esters) compounds with high thermal decomposition temperatures also have good antioxidant effects at high temperatures. Boric acid ester compounds and alkali metal salt can greatly enhance the antioxidant capacity of oil products, and these compounds will become an important development direction of high temperature antioxidant additives in the future.
The phenolic antioxidant is added to the transformer oil. The oxidative speed of the antioxidants is decreased, and the oxidative speed of oil is increased rapidly with the decrease of antioxidant content. Both natural and synthetic transformer oils with good antioxidant sensitivity are generally available. Its polycyclic aromatic hydrocarbons are low in content.
Easy oxidation of itself because of polycyclic aromatic hydrocarbons, consumed in the process of oxidation of free oxygen dissolved in transformer oil, to sacrifice himself, to protect the effect of others, to prevent further oxidation of other oil molecules, so the polycyclic aromatic hydrocarbon molecules is also a kind of antioxidant, but as a result of polycyclic aromatic hydrocarbons final oxidation product is easy to sedimentation of sludge, so high quality transformer oil are indicators of its content has strict control requirements, is also a major component of oil refining process should be refined to remove. So the most widely used antioxidant in transformer oil is T501.
The quality fraction of the base oil is above 98% and the performance of the base oil determines the physical and chemical properties and the performance of the refined oil. After oxidation of base oil, it produces precipitation, sludge and acid products, which causes the viscosity of oil to increase, which causes corrosion of equipment, leading to the decrease of performance and shortening of use cycle. Therefore, the composition of turbine oil base oil has a great influence on the oxidation stability of turbine oil.
Hydrocarbon compounds in basic oils include saturated hydrocarbons and unsaturated hydrocarbons. The saturated hydrocarbons are mainly paraffin and naphthene. The alkanes are extremely inactive under normal conditions, and in the same time, the alkane is compared with other hydrocarbon, the density is small, the viscosity is small, and the viscosity-temperature property is good. In order to ensure the low temperature flow performance of lubricating oil, most long-chain alkanes or alkanes with long side chains should be removed from the lube material during the refining process. As a result, long - chain alkanes are low in oil.
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, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
The naphthene base oil is mainly two ring and tricyclic naphthene alkyl derivatives, their chemical properties and similar alkanes, but better than alkane oxidation stability, less ring long side chain naphthene has good oxidation stability and performance.
The unsaturated hydrocarbons in the base oil are mainly aromatic hydrocarbons, which are easy to oxidize and produce colloidal and asphaltene. The aromatic hydrocarbon of the polycyclic short side chain is more easily oxidized, which is the undesirable component in the base oil.
The oxidation and induction period of oil products decreased rapidly with the increase of aromatic hydrocarbon content, and the content of aromatic hydrocarbons in the base oil had great influence on the stability of oxidation.
Non-hydrocarbon compounds in lubricating oils include nitrogen compounds, sulfur compounds, colloids and asphaltenes. It is well known that nitrogen compounds, colloids and asphaltenes have adverse effects on the oxidation stability of oil products.
Sulfur-containing compounds in lubricating oil properties, the influence of domestic there are three views: one is the natural oil more easily than hydrocarbon oxidation of sulfide, is the underlying cause of deposit, and the cause of lubricating oil color is not stable; 2. The natural sulphide in lube oil has the antioxidant effect, which is helpful for improving the oxidation stability of lubricating oil. 3. The high sulfur content in lubricating oil is unfavorable to the oxidation stability of oil, and proper sulfur content is better. But none of these three ideas has been tested. Which exists in the oxidation of sulfide in oil breakdown products can produce strong corrosion to metal, and make the product with special stench sulfide, base oil copper corrosion caused by unqualified, it is the result of high sulphur content. Sulfurous compounds are undesirable components of lubricants and are removed when refined.
It is necessary to improve the sensitivity of the oil base oil in the turbine oil and to improve the depth of refining, the content of the aromatics, the content of the gelatine and the nitride, and the content of the sulfide.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Due to the improvement of mechanical design technology, the engine will be developed in the direction of high temperature, high speed and high output power. Therefore, it is necessary to develop and develop new high temperature antioxidant additives simply by adding ZDDP anti-oxygen corrosion inhibitor to meet the requirements of high temperature oxidation resistance of oil products.
Among them, the excellent control of oil sludge generation and the ability to control viscosity increase due to high thermal decomposition temperature can be used as high temperature antioxidant additives. Carbamate (esters) compounds with high thermal decomposition temperatures also have good antioxidant effects at high temperatures. Boric acid ester compounds and alkali metal salt can greatly enhance the antioxidant capacity of oil products, and these compounds will become an important development direction of high temperature antioxidant additives in the future.
The phenolic antioxidant is added to the transformer oil. The oxidative speed of the antioxidants is decreased, and the oxidative speed of oil is increased rapidly with the decrease of antioxidant content. Both natural and synthetic transformer oils with good antioxidant sensitivity are generally available. Its polycyclic aromatic hydrocarbons are low in content.
Easy oxidation of itself because of polycyclic aromatic hydrocarbons, consumed in the process of oxidation of free oxygen dissolved in transformer oil, to sacrifice himself, to protect the effect of others, to prevent further oxidation of other oil molecules, so the polycyclic aromatic hydrocarbon molecules is also a kind of antioxidant, but as a result of polycyclic aromatic hydrocarbons final oxidation product is easy to sedimentation of sludge, so high quality transformer oil are indicators of its content has strict control requirements, is also a major component of oil refining process should be refined to remove. So the most widely used antioxidant in transformer oil is T501.
The quality fraction of the base oil is above 98% and the performance of the base oil determines the physical and chemical properties and the performance of the refined oil. After oxidation of base oil, it produces precipitation, sludge and acid products, which causes the viscosity of oil to increase, which causes corrosion of equipment, leading to the decrease of performance and shortening of use cycle. Therefore, the composition of turbine oil base oil has a great influence on the oxidation stability of turbine oil.
Hydrocarbon compounds in basic oils include saturated hydrocarbons and unsaturated hydrocarbons. The saturated hydrocarbons are mainly paraffin and naphthene. The alkanes are extremely inactive under normal conditions, and in the same time, the alkane is compared with other hydrocarbon, the density is small, the viscosity is small, and the viscosity-temperature property is good. In order to ensure the low temperature flow performance of lubricating oil, most long-chain alkanes or alkanes with long side chains should be removed from the lube material during the refining process. As a result, long - chain alkanes are low in oil.
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, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
The naphthene base oil is mainly two ring and tricyclic naphthene alkyl derivatives, their chemical properties and similar alkanes, but better than alkane oxidation stability, less ring long side chain naphthene has good oxidation stability and performance.
The unsaturated hydrocarbons in the base oil are mainly aromatic hydrocarbons, which are easy to oxidize and produce colloidal and asphaltene. The aromatic hydrocarbon of the polycyclic short side chain is more easily oxidized, which is the undesirable component in the base oil.
The oxidation and induction period of oil products decreased rapidly with the increase of aromatic hydrocarbon content, and the content of aromatic hydrocarbons in the base oil had great influence on the stability of oxidation.
Non-hydrocarbon compounds in lubricating oils include nitrogen compounds, sulfur compounds, colloids and asphaltenes. It is well known that nitrogen compounds, colloids and asphaltenes have adverse effects on the oxidation stability of oil products.
Sulfur-containing compounds in lubricating oil properties, the influence of domestic there are three views: one is the natural oil more easily than hydrocarbon oxidation of sulfide, is the underlying cause of deposit, and the cause of lubricating oil color is not stable; 2. The natural sulphide in lube oil has the antioxidant effect, which is helpful for improving the oxidation stability of lubricating oil. 3. The high sulfur content in lubricating oil is unfavorable to the oxidation stability of oil, and proper sulfur content is better. But none of these three ideas has been tested. Which exists in the oxidation of sulfide in oil breakdown products can produce strong corrosion to metal, and make the product with special stench sulfide, base oil copper corrosion caused by unqualified, it is the result of high sulphur content. Sulfurous compounds are undesirable components of lubricants and are removed when refined.
It is necessary to improve the sensitivity of the oil base oil in the turbine oil and to improve the depth of refining, the content of the aromatics, the content of the gelatine and the nitride, and the content of the sulfide.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian