Food grade lubricant compositions

Abstract

A food grade lubricant composition and method of lubricating food processing machinery. The food grade lubricant composition includes a major amount of food grade base oil and a minor amount of at least one additive composition. The additive composition includes one or more non-sludge promoting wear reducing agents. An advantage of the lubricant composition is that it may exhibit lower sludge formation tendencies than a lubricant composition containing a conventional wear reducing agent.

1 . A food grade lubricant composition comprising:
 a major amount of food grade base oil and a minor amount of at least one additive composition comprising one or more non-sludge promoting wear reducing agents, wherein the lubricant composition exhibits lower sludge formation tendencies than a lubricant composition containing a conventional wear reducing agent.   
     
     
         2 . The food grade lubricant composition of  claim 1 , wherein the one or more non-sludge promoting wear reducing agents are selected from the group consisting of triphenyl phosphorothionates, amine neutralized phosphoric acid esters, and mixtures thereof, wherein the amine is a non-branched chain amine. 
     
     
         3 . The food grade lubricant composition of  claim 1 , wherein the food grade base oil comprises an oil selected from the group consisting of white oil, vegetable oils, and mixtures thereof. 
     
     
         4 . The food grade lubricant composition of  claim 1 , wherein the additive further comprises at least one antioxidant selected from the group consisting of amine antioxidants, phenolic antioxidants, and mixtures thereof. 
     
     
         5 . The food grade lubricant composition of  claim 1 , wherein the wear reducing agent comprises a mixture of triphenyl phosphorothionate and an amine neutralized phosphoric acid esters, wherein the amine is a non-branched chain amine. 
     
     
         6 . The food grade lubricant composition of  claim 1 , wherein the additive composition further comprises a methacrylate antifoam agent. 
     
     
         7 . The food grade lubricant composition of  claim 1 , further comprising a component selected from the group consisting of a preservative, a corrosion inhibitor, and a rust inhibitor. 
     
     
         8 . The food grade lubricant composition of  claim 1 , wherein the major amount of food grade base oil comprises from about 85 to about 99.9 weight percent based on a total weight of base oil and additive composition. 
     
     
         9 . The food grade lubricant composition of  claim 1 , wherein the additive composition meets HX-1 approval criteria. 
     
     
         10 . The food grade lubricant composition of  claim 1 , wherein the lubricant composition is devoid of base oils and additives derived from animals. 
     
     
         11 . A method of operating machinery for food processing comprising:
 providing the machinery with a food grade lubricant comprising a major amount of food grade base oil and a minor amount of at least one additive composition comprising one or more non-sludge promoting wear reducing agents, wherein the lubricant composition exhibits lower sludge formation tendencies than a lubricant composition containing a conventional wear reducing agent; and   operating the machinery.   
     
     
         12 . The method of  claim 11 , wherein the one or more non-sludge promoting wear reducing agents are selected from the group consisting of triphenyl phosphorothionates, amine neutralized phosphoric acid esters, and mixtures thereof, wherein the amine is a non-branched chain amine. 
     
     
         13 . The method of  claim 11 , wherein the food grade base oil comprises an oil selected from the group consisting of white oil, vegetable oils, and mixtures thereof. 
     
     
         14 . The method of  claim 11 , wherein the additive further comprises at least one antioxidant selected from the group consisting of amine antioxidants, phenolic antioxidants, and mixtures thereof. 
     
     
         15 . The method of  claim 11 , wherein the wear reducing agent comprises a mixture of triphenyl phosphorothionate and an amine neutralized phosphoric acid esters, wherein the amine is a non-branched chain amine. 
     
     
         16 . The method of  claim 11 , wherein the additive composition further comprises a methacrylate antifoam agent. 
     
     
         17 . The method of  claim 11 , wherein the additive composition further comprises a component selected from the group consisting of a preservative, a corrosion inhibitor, and a rust inhibitor. 
     
     
         18 . The method of  claim 11 , wherein the major amount of food grade base oil comprises from about 85 to about 99.9 weight percent based on a total weight of base oil and additive composition.