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Dispersing type xanthan gum and preparation method thereof

A xanthan gum and dispersive technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of poor use effect, inability to change the dispersion performance of xanthan gum, and inability to fundamentally solve the problem of agglomeration, etc. problems, to achieve the effect of increasing the dissolution rate, shortening the dissolution time, and reducing the use loss

Active Publication Date: 2014-11-19
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method does not work well in practice
In addition, some xanthan gum manufacturers have increased the dissolution rate of xanthan gum by improving the fermentation process of xanthan gum, but they still cannot change the dispersion performance of xanthan gum, so they cannot fundamentally solve the problem of xanthan gum preparation process. clump problem

Method used

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  • Dispersing type xanthan gum and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 100.00g of toluene and transfer it into a three-necked flask; weigh 100.00g of xanthan gum and add it to a three-necked flask, start stirring at the same time, and continue stirring for 30min; weigh 3.13g of calcium chloride, 1.56g of ferric chloride, Add 3.13g of sodium metaaluminate, 9.38g of concentrated hydrochloric acid (36%) and 1.56g of sodium polyacrylate into 31.25g of distilled water to fully dissolve, then add the solution into a three-necked flask; turn on the water bath to heat, and stir at a constant temperature of 50°C 2h; Weigh 2.00g of bromododecane, slowly drop it into a three-necked flask, and continue stirring at a constant temperature at 50°C for 4h; after the reaction is completed, take out the reaction solution for suction filtration, and dry at 80°C for 4h; Obtained yellowish easy flow powdery sample, that is, dispersed xanthan gum A.

Embodiment 2

[0031] Weigh 500.00g of carbon tetrachloride and transfer it to a three-necked flask; weigh 100.00g of xanthan gum and add it to a three-necked flask, start stirring at the same time, and continue stirring for 30min; weigh 10.00g of calcium chloride, 5.00g of trichloride Iron, 10.00g sodium metaaluminate, 30.00g concentrated hydrochloric acid (36%) and 5.00g sodium polyacrylate were added to 100.00g distilled water to fully dissolve, and then the solution was added to a three-necked flask; Stir at constant temperature for 2 hours; weigh 6.00g of bromododecane, slowly add it dropwise into a three-necked flask, and continue to stir at a constant temperature for 4 hours at 30°C; after the reaction is complete, take out the reaction solution for suction filtration, and dry at 90°C for 4h; After drying, a light yellow and easy-flowing powder sample is obtained, which is the dispersed xanthan gum B.

Embodiment 3

[0033] Weigh 1000.00g cyclohexane and transfer it to a three-necked flask; weigh 100.00g xanthan gum and add it to a three-necked flask, start stirring at the same time, and continue stirring for 30min; weigh 12.50g calcium chloride, 6.25g trichloride Iron, 12.50g of sodium metaaluminate, 37.50g of concentrated hydrochloric acid (36%) and 6.25g of sodium polyacrylate were added to 125.00g of distilled water to fully dissolve, and then the solution was added to a three-necked flask; Stir at a constant temperature for 2 hours; weigh 10.00 g of bromododecane, slowly drop it into a three-necked flask, and continue to stir at a constant temperature for 4 hours at 60 ° C; After drying, a yellowish and easy-flowing powder sample is obtained, which is the dispersed xanthan gum C.

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Abstract

The invention relates to dispersing type xanthan gum, which is prepared by implementing the following steps: (1) fully stirring and mixing the following components in parts by weight: 100 parts of distilled water, 10 parts of calcium chloride, 10 parts of sodium metaaluminate, 5 parts of ferric trichloride, 30 parts of hydrochloric acid (36%) and 5 parts of sodium polyacrylate to obtain an activated solution; (2) stirring and mixing the xanthan gum and organic solvent for 30 min to obtain a xanthan gum disperse system, wherein the mass ratio of xanthan gum to the organic solvent is 1 : 1 to 1 : 10; (3) adding the activated solution to the xanthan gum disperse system, wherein the mass ratio of xanthan gum to the activated solution is 1 : 0.5 to 1 : 2, and then stirring the mixed solution at a constant temperature of 30 to 60 DEG C for 2 h; (4) slowly and dropwise adding bromododecane into the mixed solution and continuously stirring the mixed solution for 4 h at a constant temperature, wherein the mass ratio of xanthan gum to bromododecane is 1 : 0.02 to 1 : 0.1; (5) conducting suction filtration on the solution obtained in step 4 to obtain solids and drying the solids at a temperature of 70 DEG C to 90 DEG C for 4 h to obtain the dispersing type xanthan gum.

Description

technical field [0001] The invention relates to a dispersed xanthan gum and a preparation method thereof. Background technique [0002] Xanthan gum is a commonly used viscosity-increasing and shear-increasing agent for drilling fluid. When added to drilling fluid, it can significantly increase the viscosity and shear force of drilling fluid. [0003] When adding xanthan gum to drilling fluid, the surface of xanthan gum particles will quickly form a dense hydration layer after contacting with water. The generation of hydration layer hinders the diffusion of water molecules to the interior of xanthan gum particles. If the hydration layer is not quickly detached from the unhydrated part of the xanthan gum particles, then continue to add xanthan gum to the drilling fluid and clumps will form. This kind of agglomerate will still exist in the process of drilling fluid circulation, even after the high-speed shearing of the water hole of the drill bit. When passing through the vi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00C09K8/035
Inventor 赵志强苗海龙耿铁李自立张忠亮陈缘博王冲敏徐安国
Owner CHINA NAT OFFSHORE OIL CORP