Preparation method of novel organic modified sepiolite and application of organic modified sepiolite

A sepiolite, organic technology, applied in the directions of chemical instruments and methods, inorganic chemistry, drilling compositions, etc., can solve the problem that organic sepiolite does not meet the requirements for the use of oil-based drilling fluids, and organic sepiolite cannot meet the requirements of oil-based drilling fluids. Requirements for the use of base drilling fluids

Active Publication Date: 2017-06-20
CHINA UNIV OF GEOSCIENCES (BEIJING) +1
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Problems solved by technology

However, this type of organic sepiolite cannot meet the requirements of oil-based drilling fluids. Oil-based drilling fluids not only require organic sepiolite to have good dispersion characteristics in the organic system (oil phase), but also require high-temperature oil-based systems. The structure of organic sepiolite is stable, and can form a stable network structure, maintaining good thixotropy and viscosity
[0007] Therefore, in order to overcome the deficiencies in the prior art, especially in order to solve the shortcomings of having to add various additives and anti-high temperature treatment agents when simply using unmodified sepiolite; and using quaternary ammonium salts as organic modification The present situation that organic sepiolite prepared by chemical agent does not meet the requirements of oil-based drilling fluid

Method used

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  • Preparation method of novel organic modified sepiolite and application of organic modified sepiolite
  • Preparation method of novel organic modified sepiolite and application of organic modified sepiolite
  • Preparation method of novel organic modified sepiolite and application of organic modified sepiolite

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preparation example Construction

[0043] The invention provides a kind of preparation method of novel organically modified sepiolite, described method comprises the following steps:

[0044] Step 1, purifying the raw ore of sepiolite to obtain purified sepiolite;

[0045] Step 2, performing organic modification on the purified sepiolite to obtain organically modified sepiolite.

[0046] According to a preferred embodiment of the present invention, in step 2, the purified sepiolite is modified with a cationic modifier and an anionic modifier in sequence.

[0047] Among them, in the prior art, cationic modifiers are used to modify sepiolite to obtain well-dispersed sepiolite, but the sepiolite is far from meeting the requirements of oil field drilling, that is, it does not have It has high viscosity and does not have high temperature resistance. Therefore, in order to improve the high temperature resistance and high viscosity of organically modified sepiolite when drilling in the oil field, the inventor has ca...

Embodiment approach

[0049] According to a preferred embodiment of the present invention, step 1 includes the following sub-steps:

[0050] Step 1.1, pulverizing the raw ore of sepiolite and sieving to obtain raw ore powder of sepiolite;

[0051] Step 1.2, mixing sepiolite raw ore powder with water, then adding a dispersant, soaking to obtain a suspension of sepiolite raw ore powder;

[0052] Step 1.3, stirring the suspension in step 1.2, and then standing;

[0053] Step 1.4, take the upper layer suspension after standing in step 1.3, centrifuge, and then sequentially dry, pulverize, grind and sieve to obtain purified sepiolite.

[0054] According to a preferred embodiment of the present invention, in step 1.2, based on 1L of water, the amount of sepiolite raw ore is 6-14g, preferably 8-12g, more preferably 10g.

[0055] In a further preferred embodiment, in step 1.2, the dispersant is selected from inorganic sodium salts, preferably inorganic sodium salts of phosphoric acid, such as sodium hexa...

Embodiment 1

[0128] The preparation of embodiment 1 purifying sepiolite

[0129] Utilize the pulverizer to pulverize the raw ore of sepiolite, and pass through a 200-mesh sieve to obtain raw ore powder of sepiolite;

[0130]Weigh 80g of sepiolite powder and disperse it in 8L of distilled water, add the dispersant sodium hexametaphosphate accounting for 1.5% of the sepiolite weight, and soak for 24 hours to obtain the suspension of sepiolite ore powder;

[0131] Stir with an electric stirrer for 2 hours, make sepiolite into a suspension with a "concentration" not exceeding 10g / L, and let it stand at room temperature for 8 hours;

[0132] Take the upper 8cm suspension, centrifuge, dry at 60°C, pulverize, grind and sieve to obtain purified sepiolite.

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Abstract

The invention discloses a preparation method of novel organic modified sepiolite. The method comprises the following steps of first carrying out purification on sepiolite raw ore, and then carrying out modification by adopting a cationic modifier and an anionic modifier, so as to obtain the organic modified sepiolite, wherein, based on 10 parts by weight of purified sepiolite, the use level of the cationic modifier is 1 to 2.5 parts by weight; the molar weight of the adopted anionic modifier is equal to that of the cationic modifier. The method provided by the invention has the advantages that conditions are mild and not harsh, and the method is easy to realize, and is also easy for large-scale production and application; the obtained organic modified sepiolite has favorable dispersity, favorable thixotropy and high viscosity in an organic system (oil phase); moreover, the obtained organic modified sepiolite has high temperature resistance, that is, has structural stability in a high-temperature organic system (oil phase), and meets the use requirement of oil-based drilling fluid.

Description

technical field [0001] The invention relates to the field of organically modified sepiolite, in particular to a preparation method of organically modified sepiolite, in particular to a novel preparation method of organically modified sepiolite and applications of the organically modified sepiolite. Background technique [0002] Sepiolite is a magnesium-rich silicate mineral. Its theoretical chemical formula is Mg 8 [Si 2 o 30 ](OH) 4 12H 2 O, 4 of the water molecules are crystal water, and the rest are zeolite water. SiO 2 The content is 54-60%, MgO 21-25%, and often contains a small amount of iron, manganese and other elements. The appearance is earthy or fibrous. Hardness 2-2.5, density 2.2g / cm 3 . Dry ones can float in water. The color is changeable, generally white, light gray, and common are light red, light yellow, brown and so on. Orthorhombic system; a 0 = 1.34nm,b 0 = 2.68nm, c 0 =0.528nm, β=90°; Z=2. There is a one-dimensional structural channel wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C09K8/035
CPCB01J20/12B01J20/22B01J20/28C09K8/035
Inventor 廖立兵龚志金张泽朋吕国诚梅乐夫欧阳东红刘卫湘谭建杰
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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