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A kind of surface hydrophobic modified xanthan gum and preparation method thereof

A technology of hydrophobic modification and xanthan gum, applied in the field of surface hydrophobically modified xanthan gum and its preparation, can solve the problems of poor use effect, unable to fundamentally solve the problem of agglomeration, unable to change the dispersion performance of xanthan gum, etc. , to achieve the effect of improving the dissolution rate, shortening the dissolution time, and reducing the use loss

Active Publication Date: 2016-04-06
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 cannot change the dispersion performance of xanthan gum, so they cannot fundamentally solve the problem of lumps produced during the preparation of xanthan gum. block problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 40.00g of toluene and 15.00g of ethanol, and transfer them into a three-necked flask; weigh 10.00g of xanthan gum, add them into a three-necked flask, and start stirring at the same time, and continue stirring for 30min; weigh 2.00g of calcium chloride, 5.00g of three-necked Ferric chloride, 2.00g sodium metaaluminate, 7.00g concentrated hydrochloric acid (36%) and 4.00g sodium polyacrylate were added to 20.00g distilled water to fully dissolve, and then the solution was added to a three-necked flask; Stir at a constant temperature for 2 hours at ℃; weigh 1.00 g of bromodecane, slowly drop it into a three-neck flask, and continue to stir at a constant temperature for 4 hours at 50°C; when the reaction is complete, take out the reaction solution for suction filtration, and dry at 80°C for 4 hours; After drying, a light yellow and easy-flowing powder sample is obtained, which is the surface hydrophobically modified xanthan gum.

[0031] Performance Testing:

[0032...

Embodiment 2

[0043] Weigh 25.00g of toluene and 25.00g of ethanol, and transfer them into a three-necked flask; weigh 25.00g of xanthan gum, add them into a three-necked flask, and start stirring at the same time, and continue stirring for 30min; weigh 5.50g of calcium chloride, 8.00g of three-necked Ferric chloride, 1.00g sodium metaaluminate, 5.00g concentrated hydrochloric acid (36%) and 3.50g sodium polyacrylate were added to 30.00g distilled water to fully dissolve, and then the solution was added to a three-necked flask; Stir at a constant temperature for 2 hours at ℃; weigh 2.00 g of bromooctane, slowly add it dropwise into a three-neck flask, and continue stirring at a constant temperature for 4 hours at 30°C; when the reaction is complete, take out the reaction solution for suction filtration, and dry at 90°C for 4 hours; After drying, a light yellow and easy-flowing powder sample is obtained, which is the surface hydrophobically modified xanthan gum.

[0044] Test according to th...

Embodiment 3

[0047] Weigh 20.00g of toluene and 4.00g of ethanol, and transfer them into a three-necked flask; weigh 40.00g of xanthan gum, add them into a three-necked flask, start stirring at the same time, and continue stirring for 30min; weigh 6.00g of calcium chloride, 4.00g of three-necked Ferric chloride, 6.00g sodium metaaluminate, 15.00g concentrated hydrochloric acid (36%) and 4.00g sodium polyacrylate were added to 5.00g distilled water to fully dissolve, and then the solution was added to a three-necked flask; Stir at a constant temperature for 2 hours at ℃; weigh 0.40g of bromododecane, slowly drop it into a three-neck flask, and continue stirring at a constant temperature for 4 hours at 60°C; after the reaction is completed, take out the reaction solution for suction filtration, and dry at 70°C for 4 hours ; Obtain light yellow easy flow powdery sample after drying, which is xanthan gum with surface hydrophobic modification.

[0048] Test according to the performance test met...

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Abstract

The invention relates to a surface hydrophobic modified xanthan gum which is prepared from the following steps: (1) 2-6 parts by weight of calcium chloride, 4-8 parts by weight of iron trichloride, 1-6 parts by weight of sodium metaaluminate, 5-15 parts by weight of hydrochloric acid (36%), 3.5-5.5 parts by weight of sodium polyacrylate and 5-30 parts by weight of distilled water are fully stirred and mixed to obtain a liquid reactant A; (2) the xanthan gum is stirred and mixed with ethanol and toluene with the mass ratio of 0.5:1 to 4:1 and 0.1:1 to 1.5: 1 for 30 min to obtain a xanthan gum dispersing system, wherein the mass ratio of the ethanol to the xanthan gum is (0.5:1)-(4:1), and the mass ratio of the toluene to the xanthan gum is (0.1:1)-(1.5:1); (3) the liquid reactant A is added to the xanthan gum dispersing system and stirred at constant temperature of 30-60 DEG C for 2 h, wherein the mass ratio of the xanthan gum to the liquid reactant A is (1:1)-(1: 4); (4) then, bromo-alkane is slowly added into the mixture dropwise to be continuously stirred at constant temperature for 4 h, wherein the mass ratio of the xanthan gum to the bromo-alkane is (10:1)-(100:1); (5) the solution prepared in the step (4) is subjected to suction filtration and dried at the temperature of 70-90 DEG C for 4 h to obtain the surface hydrophobic modified xanthan gum.

Description

technical field [0001] The invention relates to a surface hydrophobically modified xanthan gum and a preparation method thereof. Background technique [0002] Xanthan gum is a commonly used flow pattern regulator for drilling fluid, which has the effect of increasing viscosity and increasing shear. When added to drilling fluid, it can significantly increase the viscosity and shear force of drilling fluid. [0003] In the process of adding xanthan gum to the drilling fluid, due to the viscosifying effect of xanthan gum, the xanthan gum molecules that first contact with water will quickly hydrate and form a dense hydration layer, which hinders the movement of water molecules to xanthan gum. internal diffusion of particles. Agglomerates form when mixing conditions are poor. Drilling practice shows that even after the high-speed shearing of the drill bit water hole, there is still a large amount of xanthan gum that cannot be dispersed and dissolved. After reaching the vibrat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00
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