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Hydrophobically modified xanthan gum solution as well as preparation method and application thereof

A technology of hydrophobic modification and xanthan gum, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of lack of temperature resistance, salt resistance and viscoelasticity, insufficient thickening effect of products, modification The problem of strong hydrophobicity of the material can achieve the effects of reducing production costs, enhancing potential application effects, and increasing viscosity

Active Publication Date: 2021-03-16
无锡市德宁节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, the research on non-crosslinked xanthan gum is still relatively limited, which limits the application, especially the hydrophobically modified xanthan gum mainly uses halogenated alkanes, acid chlorides, organic amines and other substances as modifiers.
Since xanthan gum is a water-soluble substance, when the predecessors used these modifiers to study the hydrophobic modification of xanthan gum, it was difficult to dissolve in water due to the strong hydrophobicity of the modified substance. Phase system, poor degree of reaction, resulting in insufficient thickening effect of the obtained product, lack of sufficient temperature resistance, salt resistance and viscoelasticity

Method used

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  • Hydrophobically modified xanthan gum solution as well as preparation method and application thereof
  • Hydrophobically modified xanthan gum solution as well as preparation method and application thereof
  • Hydrophobically modified xanthan gum solution as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]Method for preparing hydrophobic modified xanthan gum solution, including the following steps:

[0032]Step 1: Weigh 10 grams of yellow original gum, dissolved in 500 ml of deionized water at room temperature, formulated into an aqueous solution, then add a concentration of 0.5 mol / L to adjust the pH to 11, stir well, in vacuo Drying, pulverized, over 100 mesh sieves, resulting in powder-shaped xanthan gum;

[0033]Step 2: 3 grams of dodecyllate glycidyl ether is dissolved in a mixed solvent of 75 ml of tetrahydrofuran with 25 ml of deionized water, formulated into a solution;

[0034]Step 3: At room temperature, the above-mentioned powder xanthan gum was placed in a 500 ml of three flask, and then the above-described dodecyllate glycidyl ether and tetrahydrofuran and deionized water were inserted into the flask through the spray device. With continuous mechanical stirring, all dodecyllate glycidyl ether solution was sprayed within 40 minutes, and the temperature was raised to 55 ° C...

Embodiment 2

[0037]Compared to the difference in Example 1, the weight of dodechacin glycerol added in step 2 was 5 grams, and the remaining basis of Example 1; Example 2 was labeled For AXG-2.

Embodiment 3

[0039]Compared to the difference in Example 1, the weight of the dodechacidal glycerol added in step 2 was 10 grams, and the remaining uniforms were as in Example 1; Example 3 obtained by hydrophobic modified xanthose solution label For AXG-3.

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Abstract

The invention relates to a hydrophobically modified xanthan gum solution as well as a preparation method and an application thereof, and belongs to the field of xanthan gum modification. According tothe preparation method, xanthan gum is reprocessed into fine powder, and then an alkyl glycidyl ether mixed solution is intermittently sprayed into the fine powder, so that the xanthan gum is in fullcontact with alkyl glycidyl ether, and the modified xanthan gum with a good thickening effect is synthesized; the comprehensive rheological properties such as temperature resistance, salt resistance and viscoelasticity of a modified xanthan gum solution product are improved, so that a method is provided for the application of the non-crosslinked xanthan gum fracturing fluid in oilfield exploitation and reservoir development. The preparation method of the hydrophobic modified xanthan gum solution does not need to add a catalyst during the modification reaction, so that the production process issimplified, the production cost is reduced, and the preparation method can be widely popularized and applied.

Description

Technical field[0001]The present invention relates to a hydrophobic modified xantholic gum solution and a preparation method thereof, which belongs to the field of Huanghae gel modification.Background technique[0002]The xanthan adhesive (XG) is a polyanionic electrolyte polysaccharide produced by Yellow Sannokine. Due to the interaction of hydrogen bonds between molecules and molecules, it has weak gel properties, it is a kind of Typical flexural fluids are widely used in food and food packaging, cosmetics, waterborne coatings, pharmaceuticals and oil production.[0003]As a water-soluble polymer polysaccharide, xanthan gum can be used as a non-crosslinking fracturing fluid in the oilfield mining industry, which is a thickening agent having a good thickening effect. There are still some shortcomings as a thickener application, such as the required amount of amount, low high temperature viscosity. Modification of xanthan gum can further increase the basic properties of the yellowla gum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08B37/00C09K8/68C09K8/90C08L5/00
CPCC08J3/03C08B37/0033C09K8/68C09K8/90C08J2305/00
Inventor 倪才华王刚张丽萍桑欣欣
Owner 无锡市德宁节能科技有限公司