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Preparation method of water soluble hydroxyethyl carboxymethyl cellulose thickener

A technology of hydroxyethyl carboxymethyl and cellulose thickener, applied in the field of preparation method of cellulose thickener

Inactive Publication Date: 2003-12-03
WUHAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since nearly 25 years (American Chemical Abstracts), there is no bibliographical report of water-soluble hydroxypropyl carboxymethyl konjac thickener

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Refined cotton powder: chlorohydrin (or ethylene oxide): chloroacetic acid: alcohols: water: alkalis are 10: 15: 1.0: 50: 85: 1 (by weight), and the reaction temperature is 30 ± 2 ° C, The reaction time was 3.5 hours. The apparent viscosity of 0.5% reactant aqueous solution at 25°C is >32mpa.s, rolling at 120°C for 16 hours, and the apparent viscosity after cooling to 25°C is >19mpa.s; the apparent viscosity of 0.5% reactant NaCl saturated aqueous solution at 25°C >38mpa.s, rolling at 120°C for 16 hours, the apparent viscosity after cooling to 25°C>23mpa.s; the apparent viscosity of 0.5% reactant CaCl2 saturated aqueous solution at 25°C>45mpa.s, rolling at 120°C for 16 hours, The apparent viscosity after cooling to 25°C is >25mpa.s.

Embodiment 2

[0009] Refined cotton powder: chlorohydrin (or ethylene oxide): chloroacetic acid: alcohols: water: alkalis are 10: 21: 1.0: 60: 65: 21 (by weight), and the reaction temperature is 55 ± 2 ° C, The reaction time was 12 hours. The apparent viscosity of 0.5% reactant aqueous solution at 25°C is >34mpa.s, rolling at 120°C for 16 hours, and the apparent viscosity after cooling to 25°C is >20mpa.s; the apparent viscosity of 0.5% reactant NaCl saturated aqueous solution at 25°C >38mpa.s, rolling at 120°C for 16 hours, apparent viscosity after cooling to 25°C >24mpa.s; 0.5% CaCl of reactant 2 The apparent viscosity of the saturated aqueous solution at 25°C is >46mpa.s, rolled at 120°C for 16 hours, and the apparent viscosity after cooling to 25°C is >27mpa.s.

Embodiment 3

[0011] Refined cotton powder: chlorohydrin (or ethylene oxide): chloroacetic acid: alcohols: water: alkalis are 10: 25: 3.0: 100: 100: 25 (by weight), and the reaction temperature is 35 ± 2 ° C, The reaction time was 5 hours. Apparent viscosity of 0.5% reactant aqueous solution at 25°C > 26mpa.s, rolling at 120°C for 16 hours, apparent viscosity after cooling to 25°C > 21mpa.s; 0.5% reactant NaCl saturated aqueous solution at 25°C apparent viscosity >39mpa.s, roll at 120°C for 16 hours, apparent viscosity after cooling to 25°C>24mpa.s; 0.5% CaCl of reactant 2 The apparent viscosity of the saturated aqueous solution at 25°C is >47mpa.s, rolling at 120°C for 16 hours, and the apparent viscosity after cooling to 25°C is >27mpa.s.

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Abstract

A water-soluble hydroxyethyl carboxymethyl cellulose as thickening agent for drilling petroleum well and recovering petroleum is prepared from refined cotton powder and aqueous solution of alcohol as solvent through hydroxyethylation and carboxymethylation reactions on chloroethanol (or epoxy ethane) and chloroacetic acid. Its advantages are good thickening effect, high viscosity and good high-temp. resistance, easily available domestic raw materials and low cost.

Description

Technical field: [0001] The present invention relates to a kind of preparation method of cellulose thickener, especially relate to the preparation method of water-soluble hydroxyethyl carboxymethyl cellulose thickener, water-soluble hydroxyethyl carboxymethyl cellulose thickener is a kind of In the process of oil and natural gas drilling and exploitation, it is used as a working fluid in all oil and gas well water-based fracturing, foam fracturing, drilling, well completion, well cementing, etc., to thicken, gel, and reduce resistance. And so on. Background technique: [0002] Thickeners used in oil and gas well water-based fracturing, foam fracturing, acid fracturing, drilling, well completion, well cementing, etc. include polymer chemical glue and modified vegetable glue. In this technical field, currently A common and abundant thickener is modified vegetable gum. According to the existing technology "Hydroxyalkyl Carboxymethyl and Hydroxyalkyl Tianqing Powder" (East Chi...

Claims

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Application Information

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IPC IPC(8): C08L1/10
Inventor 郑化谭占鳌韩一波
Owner WUHAN UNIV OF TECH