Manufacture of lubricating grease
Номер патента: GB654084A
Опубликовано: 06-06-1951
Автор(ы):
Принадлежит: Bataafsche Petroleum Maatschappij NV
Опубликовано: 06-06-1951
Автор(ы):
Принадлежит: Bataafsche Petroleum Maatschappij NV
Реферат: <PICT:0654084/III/1> In the preparation of alkali and alkaline earth metal soap grease by the rapid and uniform cooling of the hot grease, the latter is forced from the heating and mixing zone directly into a cooled zone having a thickness of not more than about 4 inches where it is cooled statically and uniformly for a period sufficient to form a gel structure of desired texture throughout. The cooling zone may consist of a number of tubes of from 2 1/2 to 3 1/2 inches diameter cooled by air, water, or brine so as to reduce the temperature of the grease from about 400 DEG of 425 DEG F. to about 150 DEG F., the cooling time being from 1/4 to 10 hours. The grease is then passed to a homogenizer. The grease may comprise any of the alkali or alkaline earth soaps of any fatty oils or fish oils, whether hydrogenated or not, naphthenic acid, rosin oils, or synthetic or oxidized waxes or free fatty acids, and may be mixed either with any mineral lubricating oil stock or with synthetic oils such as polymerized alkylene oxides or alkyl esters of organic acids. In particular a major proportion of a mineral lubricating oil, a synthetic lubricating oil (such as 2-ethyl hexyl sebacate), or a mixture of such oils may be incorporated with a minor proportion of a lithium, sodium, or barium stearate, palmitate, or hydroxy stearate, such as lithium hydroxy stearate. Oxidation inhibitors such as N.N1-di-butyl-p-phenylene diamine or tetramethyldiamino diphenyl methane, and corrosion inhibitors such as hexylamine, octylamine, decylamine, dodecylamine, octadecylamine, or an alkyl substituted oxazoline may be added. In an example, a grease is formed of a mineral oil containing from 7 to 10 per cent lithium stearate, from 0.1 to 5.0 per cent of calcium naphthenate, from 0.1 to 5.0 per cent of an oxidation inhibitor, and from 0.1 to 5.0 per cent of a corrosion inhibitor. According to the flow diagram, Fig. 1, the hot grease mixture is conducted from a tank 1 through a heat-exchanger 5 to a homogenizer 6, where it is worked at a temperature of about 200 DEG F., and then pumped through a heater 7 kept at about 400 DEG to 500 DEG F. It then passes into a number of long cooling tubes 10 of the stated diameter, or into annular spaces 23, Fig. 2, or flat tubes 24, Fig. 4, when it remains until it has gelled. The grease is then discharged to a storage tank 12 from which it is discharged through a homogenizer 13 to packing containers 26.
Food-grade lubricating grease and method for preparing same
Номер патента: US11965141B2. Автор: Wei Wang,Juan Tang,Shanhua QIAN,Longfei GONG,Zifeng NI. Владелец: JIANGNAN UNIVERSITY. Дата публикации: 2024-04-23.