Consistency of greases

If, however, a stain is not merely held by grease, but actually consists of grease, soap will not succeed in washing it away. In that case, you need a grease solvent, such as carbon tetrachloride. 

The cone penetration tests (ASTM D-217, ASTM D-1403, IP 50, IP 167, IP 310) are standard tests for determining the penetration of grease, and they provide an indication of the consistency of grease. 

Eats and oils from a number of animal and vegetable sources are the feedstocks for the manufacture of natural higher alcohols. These materials consist of triglycerides glycerol esterified with three moles of a fatty acid. The alcohol is manufactured by reduction of the fatty acid functional group. A small amount of natural alcohol is also obtained commercially by saponification of natural wax esters of the higher alcohols, such as wool grease. 

In practice, the range of grease consistency is quite limited. For most general industrial applications, a No.2 consistency is satisfactory. Where suitability for pumping is concerned, a No. 1 for low temperatures, a No. 0 and for water pumps and similar equipment, a No. 3 may be better selections. 

Grafting two dissimilar plastics often involves a third plastic whose function is to improve the compatibility of the principal components. This compatibilizer material is a grafted copolymer that consists of one of the principal components and is similar to the other component. The mechanism is similar to that of having soap improve the solubility of a greasy substance in water. The soap contains components that are compatible with both the grease and the water. 

Painting wastewater generally consists of quench water. Wastewater from this operation is generally less toxic than wastewater from the other general operations normally, only the following pollutants are expected to exceed 10 pg/L oil and grease, fluorides, TSS, iron, zinc, bis(2-ethyl-hexyl) phthalate, and diethyl phthalate. 

Pollutant parameters and their concentrations found in the oily waste subcategory streams are shown in Table 9.9. The oily waste subcategory for the metal finishing industry is characterized by both concentrated and dilute oily waste streams that consist of a mixture of free oils, emulsified oils, greases, and other assorted organics. Applicable treatment of oily waste streams is dependent on the concentration levels of the wastes, but oily wastes normally receive specific treatment for oil removal prior to solids removal waste treatment. 

A slider bearing consists of a sleeve surrounding a cylindrical shaft that is free to move axially within the sleeve. A lubricant (e.g., grease) is in the gap between the sleeve and the shaft to isolate the metal surfaces and support the stress resulting from the shaft motion. The diameter of the shaft is 1 in., and the sleeve has an inside diameter of 1.02 in. and a length of 2 in. 

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