What is the moisture filtration capacity of bentonite Thank you

Filtration loss: The number of liters of the filtrate filtered out of the suspension under the specified test conditions is called filtration loss. Here it is mainly bentonite, attapulgite.

Petroleum field: water, as a dispersion medium of water-based drilling fluids, exists in three forms in drilling fluids, namely chemically bound water, adsorption water and free water. Under the action of pressure difference, the free water in the drilling fluid penetrates into the cracks or pores of the borehole wall rock, which is called the filtration of the drilling fluid.

Filtration loss or waterloss is usually used to indicate the strength of filtration.

Ultra-low permeability drilling fluid can be formed by adding a certain amount of zero-filtration borehole stabilizer to the water-based drilling fluid. Several ultra-low permeability drilling fluid performance test methods were introduced, including visual medium pressure sand bed filtration loss reduction evaluation test method, high temperature and high pressure sand bed filtration loss reduction test method, high temperature and high pressure core filtration loss reduction test method and core pressure bearing capacity test method. The results of the API and sand bed filtration loss reduction tests show that the filtration loss of the sand bed is not a function of the square root of time, and there is no correspondence between the filtration loss of the sand bed and the filtration loss of API.

The filtration loss of the high-temperature and high-pressure core or the depth of the filtrate entering the core can be used to explain the filtration loss reduction of the drilling fluid and the ability to plug the formation, and the type and performance of the drilling fluid have an important impact on the pressure bearing capacity of the core. The ultra-low permeability drilling fluid has a good sealing ability for sand beds, cores and fractures with different pores, and can achieve near-zero filtration. And it can enhance the sealing strength of the inner mud cake, so as to improve the core pressure capacity, leakage pressure and fracture pressure gradient, and expand the safe density window. Methods for determining filtration loss.

The number of milliliters of filtrate filtered from the suspension under the specified test conditions.

Main instruments and materials.

a.Filtration loss tester: air pressure type, pressure 700kpa;

b.Timer: measurement accuracy, two;

Test procedure Use the suspension after measuring the viscosity, and stir for 1min after measuring the viscosity. Set one timer to the other and the other.

in 30min. Pour the slurry sample into the filtration instrument, and the distance from the liquid surface to the top edge is within 13mm, put the filter paper, and filter the filter.

The instrument is assembled. Remember the time, tighten the pressure relief valve, adjust the pressure regulator, and add 700 35kpa pressure within 30s.

, remove the liquid hanging from the drain nozzle. Collect the filtrate with a dry graduated cylinder. After 30min, remove the suspension in.

Drain the liquid on the nozzle and remove the graduated cylinder, disconnect the pressure, and note the volume of liquid collected from 30 minutes.

The result is calculated as fl=2·v2

Where: FL - 30min suspension filtrate, ml;

v2 – filtrate volume, ml.

Summary. Bentonite content 21 can be used to determine the wettability of the soil, as well as the organic matter content of the soil. Bentonite content21 can be used to judge the quality of the soil, as well as the fertility of the soil.

In addition, bentonite content 21 can also be used to determine the suitability of the soil, as well as the moisture status of the soil.

Bentonite content 21 can be used to determine the wettability of the soil, as well as the organic matter content of the soil. Bentonite content of 21 can be used to judge the quality of the soil, as well as the fertility of the soil. In addition, bentonite content 21 can also be used to determine the suitability of the soil, as well as the moisture status of the soil.

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Bentonite content 21 refers to the content of bentonite in the soil, which is an important indicator of soil quality and can reflect the fertility and water retention capacity of the soil. If the bentonite content is too low, it may lead to damage to the soil structure or sails, reduce the ability to retain water and reduce soil fertility, thus affecting the growth and development of crops. The solutions to this problem are:

1.Strengthen soil management, increase the organic matter content of the soil, improve the soil structure of hail, and increase the content of bentonite. 2.

Reasonable fertilization, choose the appropriate fertilization method, improve the fertility of the soil, increase the content of bentonite. 3.Reasonable irrigation, choose appropriate irrigation methods, improve the water retention capacity of the soil, and increase the content of bentonite.

Personal Tips:1Strengthen soil management, increase soil organic matter content, improve soil structure, and increase bentonite content.

2.Reasonable fertilization, choose the appropriate fertilization method, improve the fertility of the soil, increase the content of bentonite. 3.

Reasonable irrigation, choose appropriate irrigation methods, improve the water retention capacity of the soil, and increase the content of bentonite. 4.Rational use of pesticides, reduce the use of pesticides, reduce soil pollution, protect soil quality, and increase bentonite content.

The pro-bentonite composite is conducive to increasing the water absorption rate of the resin and the saturation rate of dilute brine. How to add bentonite absorbent material separately is equivalent, when kaolin and bentonite are added. When the ratio is two to one, the resin has a higher water absorption rate and saturated brine rate at the same time.

The effect of composite bentonite ratio on the water retention performance of resin is not very obvious, when the composite bentonite increases from 5% to 40%, it can greatly improve the water retention capacity, and the water molecules in the saturated bentonite reach 10%, and the water retention performance is the most superior.

The uses of bentonite are:

1. It can be used to remove toxins from edible oil, purification of gasoline and kerosene, and wastewater treatment;

2. Due to its good water absorption and expansion performance, dispersion, suspension and slurry-making, it can be used for drilling mud, flame retardant, suspension fire extinguishing;

3. It can be used as a filler in the spring industry of papermakers, which can optimize the performance of the coating pin, such as adhesion, hiding power, water resistance, scrubbing resistance, etc.;

4. Due to its good adhesion, it can be used instead of starch for yarn sizing in the textile industry, which is not only food-saving, but also hair-free, and does not emit peculiar smell after the oar.

Bentonite is a kind of clay rock, also known as montmorillonite claystone, often containing a small amount of illite, kaolinite, halloysite, chlorite, zeolite, quartz, feldspar, calcite, etc.; It is generally white and light yellow, and is light gray, light green, pink, brownish, brick red, gray-black, etc. due to the change of iron content; waxy, earthy or greasy luster; Bentonite clay is loose like earth, while others are dense and hard. The main chemical components are silica, aluminum oxide and water, and also contain iron, magnesium, calcium, sodium, potassium and other elements, and the content of Na2O and CAO has a great influence on the physical and chemical properties and technological properties of bentonite. Montmorillonite minerals belong to the monoclinic crystal system, usually in the form of earthy blocks, white, sometimes with light red, light green, light yellow and other colors.

The luster is dull. Hardness 1 2, density 2 3g cm3. According to the type, content and interlayer charge of montmorillonite exchangeable cations, bentonite can be divided into sodium bentonite (alkaline soil), calcium-based bentonite (alkaline soil), natural bleached soil (acidic soil or acidic white clay), of which calcium-based bentonite includes calcium-sodium group and calcium-magnesium base.

Bentonite has strong hygroscopicity and swelling, which can adsorb 8 15 times the amount of water by its own volume, and the volume expansion can reach several times to 30 times; It can be dispersed into gelatinous and suspended forms in aqueous medium, and this medium solution has certain viscosity, thixotropy and lubricity; Strong cation exchange capacity; It has a certain adsorption capacity for various gases, liquids and organic substances, and the maximum adsorption capacity can reach 5 times its own weight; It is malleable and cohesive with admixtures of water, mud or fine sand; Surface-active acidic bleached clay (activated clay, natural bleached clay-acidic clay) adsorbs colored ions.

Bentonite is porphyry, which is a kind of clay with montmorillonite as the main component, commonly known as "white clay". The main components are calcium (10%), potassium (6%), aluminum (8%), magnesium (4'), iron (4%), silicon (30%), sodium (, and a small amount of zinc, manganese, cobalt, copper, aluminum, molybdenum, titanium and other trace elements. The exterior color is pale yellow or light gray.

Contains mineral elements that are beneficial to the body of livestock and poultry, and after being released into the human intestine, it can promote the activity of enzymes and hormones in the body or improve immunity; It can adsorb toxic and harmful substances in the body, such as ammonia and hydrogen sulfide gas, adsorb germs in the intestine and inhibit their growth. Bentonite is added to the serving, one can be directly used as a feed component; the second is as a carrier or diluent for trace elements; The third is as a carrier of pellet feed. Rabbit feed can add 1-3% of the mouth.