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Grease is a fine dispersion of an oil-insoluble thickening agent - usually soap in a fluid lubricant which is generally mineral lubricating oil. The soap is made up of fatty acid, tallow or vegetable oil saponified with alkali which can be hydrated lime, caustic soda, lithium hydroxide or aluminum hydroxide.
The lubricating oil component is refined base oil-naphthenic, of medium viscosity index, or cylinder oil stock. Its appearance is smooth, mostly translucent, soft or hard Properties essential for performance of grease are structural stability, lubricating quality, low and high temperature performance which are provided by the selected lube oil base stockwhere as properties such as water resistance, high temperature quality, resistance to break down through continuous use and ability of grease to Bentonite sulphur in place are provided by the soap.
Graphite, modified clay, asphalt, oxidation and corrosion inhibitors, extreme pressure additives melybdenum disulphide etc.
Unit Processes And Unit Equipment In Grease Manufacturing Pumping of raw material from storage tanks into day tanks Raw materials measurement by volume or weight using weighing scales, meters, tank gauges etc.
Preparing the soap by heating and premixing fat and lube oil in kettles with counter rotating scraper stirrer operated by motor and reduction gear. Cooling of the prepared soap and balancing with oil to prepare grease in a cooling kettle. Formation of grease structure by dispersion in a milling machine under controlled moisture and temperature parameters.
Pumps- gear and centrifugal for lube oils, vegetables oils, liquid soap and grease at various stages of manufacturing. Material handling equipment like hoist, pallet trucks, and fork lifts to handle solid fats, additives, alkali, drums etc. Safety and fire protection devices. Used for simple bearings, general purpose machinery and chassis lubrication for normal temperature applications.
At about 80 deg. Calcium based greases are water resistant and are low in cost. Used quite generally for ball and roller bearings.
Exceptionally good for sealed for life bearings. Suitable for high temperature conditions up to deg. Soda base greases are soluble in water.
They have natural anti-corrosion and good rust protection properties. They do not separate at high rotational speed. Their cost is moderate. Their characteristics are similar to calcium base greases - water resistance and normal temperature applications.
They have exceptional stringiness and adhesive properties. Generally they are semi fluid products, clear and transparent. They are used when adhesiveness is important. These greases are selected for multipurpose industrial and automotive application. They are stable up to deg.
Where many types of machines or equipment are in operation over widely varying conditions, an inventory of several greases and grades must be maintained if only single purpose greases are used. Here lithium base multipurpose greases are attractive - offering in a single product- combination of many advantages of single use greases.
Cost of lithium base is moderately high. Not much in use due to high cost and time and other manufacturing factors to produce to produce soap. They have outstanding shear stability and have multipurpose applications similar to lithium base greases. EP agents are added to conventional greases for use where unit pressures are high or where shock loads may be encountered.
EP agents are lead, chlorine, sulphur or phosphorus compounds. Molybdenum, disulphide Moly is widely for automotive lubricating greases.A list of additives currently permitted in food within the European Union and their associated E Numbers.
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Location. Head Office: Plot , Lrg Perindustrian Bkt Minyak 11, Kawasan Perindustrian Bkt Minyak,Mukim 13, Seberang Perai Tengah, Penang,Malaysia. Soap Deli News. Original homemade soap recipes, natural skin care recipes, beauty DIY's and craft projects from Southwestern Virginia blogger, Rebecca D.
Dillon. Systems for the continuous mixing, solidification and handling of sulphur bentonite and other solid/melt mixtures. Sulphur Bentonite Degradation. The thiobacillus bacterium is naturally occurring in nearly all soils.
When sulphur bentonite is applied, the moisture in the soil is absorbed into the bentonite clay, which swells and breaks the pastille particle into very small sulphur particles in the range micron.