In this paper,the effect of using hindered phenol,zinc dialkyl dithiocarbamate(ZDDC),tolutriazole derivative and combinations thereof to inhibit a blend of commodity Canola Oil and high oleic content soybean oil(1:1) ...In this paper,the effect of using hindered phenol,zinc dialkyl dithiocarbamate(ZDDC),tolutriazole derivative and combinations thereof to inhibit a blend of commodity Canola Oil and high oleic content soybean oil(1:1) was investigated.Specifically,oils were oxidized by bubbling oxygen through 300 mL samples heated at 95 ℃.Antioxidant depletion rates were indirectly monitored by measuring oxidation induction times(OIT) as determined by Pressure Differential Scanning Calorimetry(PDSC).Preliminary data indicated that oil treated with only ZDDC had the slowest rate of antioxidant depletion.展开更多
Global economic and pollution concerns are having a major impact on how modern engine oils are being formulated.Modern engine oil specifications mandate reduced levels of phosphorus and sulfur to protect the efficacy ...Global economic and pollution concerns are having a major impact on how modern engine oils are being formulated.Modern engine oil specifications mandate reduced levels of phosphorus and sulfur to protect the efficacy of pollution control devices.In addition,modern engine oil must also be more fuel efficient than earlier generations to reduce greenhouse gas emissions and the impact of high priced gasoline and diesel fuel to the consumer.At the same time,oxidation,wear,and corrosion performance of the oil must not be compromised.Multifunctional additives are useful formulation tools that help formulators meet these tough new challenges.One such additive is the organo-borate ester/amide.Originally conceived as an organic friction modifier,this patented technology is really a multifunctional additive that addresses the global economic and pollution concerns.With the addition of boron,this unique commercial organic friction modifier also imparts antioxidancy,antiwear and anticorrosion properties to engine oil.In addition,the organo-borate ester/amide is compatible with pollution control devices because it does not contain sulfur or phosphorus.Work is on going to uncover additional beneficial properties of this chemistry.展开更多
Phosphorus is known to poison the exhaust gas catalysts used to control emissions in modern gasoline-fueled passenger car vehicles.Phosphorus volatility has been studied by others as a potential issue related to the c...Phosphorus is known to poison the exhaust gas catalysts used to control emissions in modern gasoline-fueled passenger car vehicles.Phosphorus volatility has been studied by others as a potential issue related to the compatibility of modern engine oils with exhaust gas catalysts using a modified version of the ASTM D5800(Noack) test as well as the Sequence ⅢG engine test(ASTM D7320).The level of phosphorus volatility in these tests has been shown to be strongly affected by the chemistry of the zinc dialkyldithiophosphate(ZDDP) used in the engine oil formulation.The TEOST MHT-4 test(ASTM D7097) is a high temperature deposit test currently included in the ILSAC GF-4 specification.This bench test simulates the oxidation and deposit-forming characteristics of engine oils in the hot zones of modern high-performance engines and,therefore,was chosen by the author(s) as a tool to investigate differences in phosphorus volatility of modern engine oils.Our investigations demonstrate that the TEOST MHT-4 test is capable of measuring phosphorus volatility of engine oils with very good discrimination and precision;it may be considered for use in future ILSAC standards(e.g.GF-5).展开更多
A new method for the preparation of dinuclear molybdenum dithiocarbamates(MoDDCs) is reported.This new method allows for the control of the amount of sulfurization of the Mo2SxO4-x core(x = 1 to 4) in the dinuclear Mo...A new method for the preparation of dinuclear molybdenum dithiocarbamates(MoDDCs) is reported.This new method allows for the control of the amount of sulfurization of the Mo2SxO4-x core(x = 1 to 4) in the dinuclear MoDDCs.This control assists in the tailoring of specific tribological properties of the MoDDCs in both greases and lubricating oils.展开更多
文摘In this paper,the effect of using hindered phenol,zinc dialkyl dithiocarbamate(ZDDC),tolutriazole derivative and combinations thereof to inhibit a blend of commodity Canola Oil and high oleic content soybean oil(1:1) was investigated.Specifically,oils were oxidized by bubbling oxygen through 300 mL samples heated at 95 ℃.Antioxidant depletion rates were indirectly monitored by measuring oxidation induction times(OIT) as determined by Pressure Differential Scanning Calorimetry(PDSC).Preliminary data indicated that oil treated with only ZDDC had the slowest rate of antioxidant depletion.
文摘Global economic and pollution concerns are having a major impact on how modern engine oils are being formulated.Modern engine oil specifications mandate reduced levels of phosphorus and sulfur to protect the efficacy of pollution control devices.In addition,modern engine oil must also be more fuel efficient than earlier generations to reduce greenhouse gas emissions and the impact of high priced gasoline and diesel fuel to the consumer.At the same time,oxidation,wear,and corrosion performance of the oil must not be compromised.Multifunctional additives are useful formulation tools that help formulators meet these tough new challenges.One such additive is the organo-borate ester/amide.Originally conceived as an organic friction modifier,this patented technology is really a multifunctional additive that addresses the global economic and pollution concerns.With the addition of boron,this unique commercial organic friction modifier also imparts antioxidancy,antiwear and anticorrosion properties to engine oil.In addition,the organo-borate ester/amide is compatible with pollution control devices because it does not contain sulfur or phosphorus.Work is on going to uncover additional beneficial properties of this chemistry.
文摘Phosphorus is known to poison the exhaust gas catalysts used to control emissions in modern gasoline-fueled passenger car vehicles.Phosphorus volatility has been studied by others as a potential issue related to the compatibility of modern engine oils with exhaust gas catalysts using a modified version of the ASTM D5800(Noack) test as well as the Sequence ⅢG engine test(ASTM D7320).The level of phosphorus volatility in these tests has been shown to be strongly affected by the chemistry of the zinc dialkyldithiophosphate(ZDDP) used in the engine oil formulation.The TEOST MHT-4 test(ASTM D7097) is a high temperature deposit test currently included in the ILSAC GF-4 specification.This bench test simulates the oxidation and deposit-forming characteristics of engine oils in the hot zones of modern high-performance engines and,therefore,was chosen by the author(s) as a tool to investigate differences in phosphorus volatility of modern engine oils.Our investigations demonstrate that the TEOST MHT-4 test is capable of measuring phosphorus volatility of engine oils with very good discrimination and precision;it may be considered for use in future ILSAC standards(e.g.GF-5).
文摘A new method for the preparation of dinuclear molybdenum dithiocarbamates(MoDDCs) is reported.This new method allows for the control of the amount of sulfurization of the Mo2SxO4-x core(x = 1 to 4) in the dinuclear MoDDCs.This control assists in the tailoring of specific tribological properties of the MoDDCs in both greases and lubricating oils.
