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Preparation method of low-molecular-weight plant gelatin powder

A plant rubber powder, low molecular weight technology, applied in the field of preparation of low molecular weight plant rubber powder, to achieve the effects of shortened swelling time, increased thickening and sticking speed, and good salt compatibility

Inactive Publication Date: 2013-09-18
郑建立
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no effective method for preparing low-molecular-weight vegetable gums

Method used

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  • Preparation method of low-molecular-weight plant gelatin powder
  • Preparation method of low-molecular-weight plant gelatin powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation of embodiment 1 low molecular weight guar gum thickener

[0020] Take guar gum film imported from India ("Xuelong brand", 98%), mix it with water at a weight ratio of 100:40 at room temperature, and put it in a hydrator (the hydrator is a horizontal stirring reactor, Weihai Xintai Chemical Machinery Co., Ltd.) Co., Ltd.’s GSHA horizontal stirring tank) for 60 minutes of hydration, using a double-sided mechanical viscosifier (Lisheng Chemical Machinery Co., Ltd., LG500 screw extrusion kneader) to viscosify the hydrated guanidine rubber sheet For processing, elongated guar gum strips were prepared. Spray and mix the thickened guar gum strips with the mannanase solution at a weight ratio of 100:50, keep the temperature of the hydrator at 50°C, and react for 120 minutes. The mannanase used in this reaction The enzyme activity of the liquid is 20U / ml. Then, according to the weight ratio of 100:10, spray the neutral protease liquid in the reaction system, th...

Embodiment 2

[0021] The preparation of embodiment 2 low-molecular-weight cougar gum thickener

[0022] Take coumarin film (taken from Huangshan Vegetable Gum Co., Ltd.), mix it with water at a weight ratio of 100:30 at room temperature, hydrate in a hydrator for 60 minutes, and use a three-roller viscosifier (Lisheng Chemical Machinery Co., Ltd. company, S-405 type) to increase the viscosity of the hydrated coumarin film to prepare a thin and long strip. Spray and mix the thickened coumarin strips with the mannan enzyme solution at a weight ratio of 100:40, keep the temperature of the hydrator at 45°C, and react for 30 minutes. The mannan used in the reaction The enzyme activity of the enzyme liquid is 2.0U / ml. Then, according to the weight ratio of 100:5, spray the neutral protease liquid in the reaction system, the enzyme activity of the neutral protease liquid used is 1.0 U / ml, continue to stir, and react for 10 minutes. The reaction system was quickly dried at 120°C, and the dried gu...

Embodiment 3

[0033] Embodiment 3 The use of low-molecular vegetable gum fracturing fluid

[0034] Take the low-molecular vegetable gel thickener prepared in Example 1, prepare the fracturing fluid base fluid according to 0.4% low-molecular-weight guar gum thickener, 2.0% KCl, and 0.03% NaOH, ripen for 30 minutes, and take organic boron from Tianhe Fuhua Company Cross-linking agent BCL-61, the gel was prepared with the cross-linking ratio of base liquid: cross-linking agent = 100:0.3, and the temperature and shear resistance of the gel was measured at 100°C and 170s-1 shear conditions, and the test was completed ( After 90 minutes), adjust the pH of the gel system to 4.0 with 1.0% hydrochloric acid solution to break the gel, then place it for 24 hours, and then use 2.0% NaOH solution to adjust the pH of the system to above 10.0 to form a gel, and repeat the above test process. The evaluation of the temperature resistance and shear resistance performance of the low-molecular-weight plant gum...

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Abstract

The invention relates to a preparation method of low-molecular-weight plant gelatin powder. The method comprises the following steps of: hydrating, rubbing, rolling and tackifying a plant gelatin sheet; sequentially carrying out enzymolysis treatment by utilizing mannose enzyme liquid and neutral protease liquid; and drying prepared plant gelatin with the certain molecular weight and treating into gelatin powder with the 120-160-mesh size. The plant gelatin sheet prepared by using the method disclosed by the invention can be any one of a guanidine gelatin sheet, a sesbania gelatin sheet and a tonka-bean gelatin sheet. A prepared product has the advantages of low water insoluble matters, high thickening efficiency, rapidness in thickening, protruding salt solubility, temperature stability and corrosion resistance, capability of being repeatedly used, and the like.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas exploration reagents, and in particular relates to a preparation method of low-molecular-weight vegetable rubber powder. technical background [0002] In the field of oil and gas exploration, vegetable glue is usually used as a thickener for hydraulic fracturing fluid, and forms a viscoelastic jelly with multiple functions with crosslinking agents (such as organic boron), pH regulators, gel breakers, etc. . The vegetable gums currently used in the petroleum industry are mainly poly-galactomannan (PGM) polysaccharides and their derivatives. Galactomannan is a polysaccharide consisting of mannose backbone and galactose side chains. More precisely, galactomannan is connected by threads (1,4-β-D-mannose Sugar, β-1,4-D-mannopyranose) main chain and 1,6-α-D-galactose polysaccharide connected to the main chain, that is, 1,6-linked α-D-galactopyranose ( α-1,6-D-galactopyranose) side c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14
Inventor 郑建立其他发明人请求不公开姓名
Owner 郑建立
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