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Method for preparing hydrolyzed polyacrylonitrile filtrate reducer by cross-linking inorganic metal ions

A technology of fluid loss reducer and crosslinking agent, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of high cost, unfavorable industrial application, complicated formulation and preparation of fluid loss reducer, etc. Improved performance, environmental friendliness, good product quality stability

Inactive Publication Date: 2013-08-21
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formula and preparation of the fluid loss control agent are complex and costly, which is unfavorable for industrial application

Method used

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  • Method for preparing hydrolyzed polyacrylonitrile filtrate reducer by cross-linking inorganic metal ions
  • Method for preparing hydrolyzed polyacrylonitrile filtrate reducer by cross-linking inorganic metal ions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Wash with 800g of waste acrylic fiber, dry it, add it into a 5-liter kneader, configure 1200g solution of 400g NaOH and pour it into the above-mentioned kneader, heat up to 110°C, and start kneading. After kneading for 1 hour, the acrylic fiber was gradually hydrolyzed and turned brownish red, and then 30g of aluminum trichloride was poured into the above-mentioned kneader from the feeding port to continue kneading for 1 hour, and then the kneading was stopped, and the obtained jelly was dried at 110°C for 10 hours, and then Crush and pass through an 80-mesh sieve to obtain powder, which is packaged. Denote it as product A.

Embodiment 2

[0022] Wash with 800g of waste acrylic fiber, dry it, add it into a 5-liter kneader, configure 1200g solution of 400g NaOH and pour it into the above-mentioned kneader, heat up to 110°C, and start kneading. After kneading for 1 hour, the acrylic fiber was gradually hydrolyzed and turned brownish red, and then 50g of aluminum trichloride was poured into the above-mentioned kneader from the feeding port to continue kneading for 1 hour, and then the kneading was stopped, and the obtained jelly was dried at 110°C for 10 hours, and then Crush and pass through an 80-mesh sieve to obtain powder, which is packaged. Denote it as product B.

Embodiment 3

[0024] Wash with 800g of waste acrylic fiber, dry it, add it into a 5-liter kneader, configure 1200g solution of 400g NaOH and pour it into the above-mentioned kneader, heat up to 110°C, and start kneading. After kneading for 1 hour, the acrylic fiber is gradually hydrolyzed and turns brownish red, and then 80g of aluminum trichloride is poured into the above-mentioned kneader from the feeding port to continue kneading for 1 hour, then stop kneading, and the obtained jelly is dried at 110°C for 10 hours, and then Crush and pass through an 80-mesh sieve to obtain powder, which is packaged. Denote it as Product C.

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Abstract

The invention relates to a method for preparing a hydrolyzed polyacrylonitrile filtrate reducer by cross-linking inorganic metal ions, which comprises the following steps of taking NaOH as a catalyst, taking trivalent aluminum salts or trivalent iron salts as a crosslinking agent, and hydrolytically reacting with a waste acrylic raw material to obtain jelly; and drying the jelly at a temperature of 100 to 110 DEG C, crushing and screening to obtain the filtrate reducer, wherein the NaOH is 10 to 30%, the trivalent aluminum salts or trivalent iron salts are 1 to 7%, the waste acrylic is 25 to 40%, and the balance is water. The filtrate reducer has good water-solubility, low filtration, stable quality, simple processing technology, and environment friendliness, and is easy for industrial scale production.

Description

technical field [0001] The invention relates to a preparation method of a fluid loss reducer for drilling fluid, in particular to a preparation method of a polyacrylonitrile hydrolyzate cross-linked with inorganic metal ions. Background technique [0002] Filtrate reducer is the most commonly used additive in petroleum drilling fluid. It can reduce the penetration of water in the drilling fluid into the formation, thereby stabilizing the well wall and protecting the formation. There are many kinds of fluid loss control agents, mainly including carboxymethyl cellulose, modified starch, phenolic resin, lignite, hydrolyzed polyacrylonitrile and chemically synthesized multi-component copolymerization products. Among them, hydrolyzed polyacrylonitrile is favored by users because of its low cost, simple processing, and good temperature and salt resistance. However, the raw materials for processing hydrolyzed polyacrylonitrile are usually waste textile acrylic fibers, so the prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08L33/20C09K8/035
Inventor 张文郁郑利强
Owner SHANDONG UNIV
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