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Polyisobutene Succinimide Stabilizers And Thickeners May 17, 2017

Polyisobutene Succinimide Bentonite mineral structure is unique, crystalline chemical properties and excellent physical properties, is widely used in petroleum, metallurgy, casting, machinery, ceramics, construction, light industry, paper, textile and food industries, can be used as binder, Agents, thixotropic agents, flocculants, detergents, stabilizers and thickeners, etc., play an important role. In the application of bentonite has an important role. At present, the main methods to improve the dispersibility of bentonite are as follows: (1) adding dispersant such as sodium pyrophosphate and sodium hexametaphosphate to improve dispersibility; (2) organic modification of bentonite.

Effect of sodium pyrophosphate on the dispersibility of modified bentonite

Experimental method: The modified bentonite and sodium pyrophosphate in different proportions dispersed in water, the use of high-speed disperser at 1200 r / min dispersed 30 to 40 min, so that modified bentonite can be completely dispersed in water, dubbed a good dispersion of the solution, The coated solution was diluted 10 times for Zeta potential and particle size distribution. Part of the solution was dried in an oven at 60 ° C to obtain a powder. The powder was subjected to XRD testing and the results were used to calculate the interplanar spacings formed by the dispersion of each solution. The modified bentonite soil and sodium pyrophosphate powder were subjected to Fourier infrared test, and the modified bentonite solution after adding sodium pyrophosphate was subjected to infrared test.

The effect of sodium pyrophosphate on the structure of bentonite was studied by using sodium pyrophosphate as a dispersant to modify the bentonite aqueous solution. The effects of bentonite concentration (5% to 10%) on the dispersion structure were studied. The results showed that: When the ratio of sodium pyrophosphate and bentonite is about 1:10, the interplanar spacing is small and the Zeta potential of the solution is the lowest. Using this ratio of sodium pyrophosphate to disperse the bentonite,Polyisobutene Succinimide the effect of the modified bentonite concentration on the dispersion structure is With the increase of the concentration of modified bentonite, the interplanar spacing decreased first and then increased, and the average particle size in the solution increased. And there is an oxygen bond between sodium pyrophosphate and bentonite.

Bentonite Organic Modification Improves Dispersibility

Bentonite for organic modification to improve the dispersion, including quaternary ammonium salt modified bentonite, ammonium chloride modified bentonite, bromoammonium modified bentonite, amide modified bentonite, pyridine modified bentonite, silane modified bentonite, dodecane Sodium sulfonate modified bentonite and the like.

Quaternary ammonium salt modified bentonite: the use of quaternary ammonium ions in a variety of arrangements into the montmorillonite layer, so as to enhance its dispersion method The mechanism is the use of organic intercalation technology to modify montmorillonite,Polyisobutene Succinimide The organic montmorillonite in the organic phase is not fused and stratified into organic montmorillonite which can be uniformly dispersed in the organic system.

Chloride salt modified bentonite: from the perspective of the surface of activated organic soil, the introduction of polar activator,Polyisobutene Succinimide through the activator and the organic soil surface of the hydroxycarbonylamino group and other functional groups to improve the organic soil activity in the oil-based drilling Experiments in the liquid system showed that the dispersibility of MMT modified by tetradecyltrimethylammonium chloride cetyltrimethylammonium chloride in oil was improved. But not all trimethylammonium chloride modifications are successful.

Bromide salt modified bentonite: selected dodecyl trimethyl ammonium bromide (DDTMAB) tetradecyltrimethylammonium bromide (TDTMAB) cetyltrimethylammonium bromide (HDTMAB) octadecane (Ca-mmt-1, Ca-mmt-2) and sodium (1) were prepared by dry ball milling in the presence of four kinds of quaternary ammonium salts with different alkyl chain lengths such as trimethylammonium bromide (ODTMAB) (Na-mmt) was used to modify the organic bentonite. The X-ray diffraction analysis of the organic bentonite was carried out. The results showed that under the condition of dry ball milling, the modifier The shorter the chain length, the easier it is to enter the montmorillonite layer, with the chain length increasing, the higher the orderly degree in the montmorillonite layer.