Effect of Trace Water on Precipitation Value of Detergent-News-Jinzhou Bett Chemical Co .,Ltd-Jinzhou Bett Chemical Co .,Ltd

Effect of Trace Water on Precipitation Value of Detergent

2020-04-27 01:44:42

Because the base oil often contains trace water, in the presence of trace water, long-term storage is prone to precipitation. Through experiments, we simulate the influence of detergent and precipitation value of different manufacturers in the presence of trace water. Through a large number of tests, different detergents from different manufacturers and different base oils will affect the change of sedimentation value. The detergent is composed of Ca(OH)2/CaCO3, an alkaline component in the middle coated by outer surfactant, which is dispersed in oil in the form of micelles. In the case of trace water, soluble easily reacts with metal calcium, molybdenum, zinc and so on to form oil-insoluble crystals.

1. Test materials

(1) Base oil

①150N(Huizhou)+8%T614+0.2% deionized water

②500N(Formosa)+8%T614+0.2% deionized water

(2) Detergent

Sulfonate and sulfurized alkyl phenol salts from different manufacturers

2. Test method

Add 3% detergent into the base oil and stir evenly. Then add part of the oil sample into 100ml centrifugal tube and observe the change of the oil sample

3. Result

Different manufacturer	500N+T614+0.2%水	150N+T614+0.2%水
T106-A	The oil sample was blue and blue without precipitation	The oil sample was blue and blue without precipitation
T106-B	The oil sample was brownish yellow with 0.5ml yellow precipitate at the bottom	The oil sample was brownish yellow with 0.5ml yellow precipitate at the bottom
T106D(TBN400)-A	The oil sample was blue and blue without precipitation	The oil sample was blue and blue without precipitation
T106D(TBN400)-B	The oil sample was brownish yellow without precipitation	The oil sample was brownish yellow without precipitation
T107-A	The oil sample is slightly cloudy without precipitation	The oil sample is slightly cloudy without precipitation
T107-B	The oil sample was cloudy with 6ml white precipitate	The oil sample is turbid without precipitation
T115B-A	In 500N, the oil sample was transparent and 0.25ml precipitated	In 150N, the oil sample is transparent and the bottom is slightly precipitated
T115B-B	Precipitation of white particles at 20ml	White particles precipitate at 2ml

4. Evaluation：

The detergents of different manufacturers have different water separation capacity in different base oils, which is due to the different water resistance of the detergents, the detergents all contain oil-loving and water-loving groups, which can form association micelles in oil. When water is "transported" to the vicinity of these associating micelles under certain mechanical stirring conditions, the different oil-hydrophilic equilibria of surfactant determine whether their hydrophilic groups are bound to water and the degree and mode of binding. If the combination is firm enough to form a stable emulsion, the precipitation value will increase; on the contrary, the hydrophilic group of the association micelles will not combine with or combine to form an unstable emulsion, so the detergent has good water resistance and less precipitation value.

1.Calium Sulfonate

2.Calcium Sulfurized Alkyl Phenate

3.Magnesium Sulfonate