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Method for preparing hydrolytic polyacrylonitrile filtrate reducer by organic diamine cross-linking agent

A technology of fluid loss reducer and cross-linking agent, which is applied in the field of drilling fluid additives, can solve the problems of unsatisfactory overall effect, and achieve the effects of good product quality stability, improved product performance, and simple processing technology

Inactive Publication Date: 2013-07-31
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods have improved the fluid loss reduction performance of the acrylic waste hydrolyzate to varying degrees, but the overall effect is not ideal

Method used

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  • Method for preparing hydrolytic polyacrylonitrile filtrate reducer by organic diamine cross-linking agent
  • Method for preparing hydrolytic polyacrylonitrile filtrate reducer by organic diamine cross-linking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Wash with 800g waste acrylic fiber, after drying, join in the kneader of 5 liters. Then pour 100g of ethylenediamine into the above-mentioned kneader. 400g NaOH was configured into 1200g solution and poured into the above-mentioned kneader, and the heating was turned on to raise the temperature to 110°C. After the temperature of the kneader reached 110° C., kneading was started for 1 hour. Then the kneading was stopped, and the obtained jelly was dried at 110° C. for 10 hours, then crushed and passed through an 80-mesh sieve to obtain a powder, which was packaged. Denote it as product A.

Embodiment 2

[0024] Wash with 800g waste acrylic fiber, after drying, join in the kneader of 5 liters. Then pour 150g of ethylenediamine into the above kneader. 400g NaOH was configured into 1200g solution and poured into the above-mentioned kneader, and the heating was turned on to raise the temperature to 110°C. After the temperature of the kneader reached 110° C., kneading was started for 1 hour. Then the kneading was stopped, and the obtained jelly was dried at 110° C. for 10 hours, then crushed and passed through an 80-mesh sieve to obtain a powder, which was packaged. Denote it as product B.

Embodiment 3

[0026] Wash with 800g waste acrylic fiber, after drying, join in the kneader of 5 liters. Then pour 200g of ethylenediamine into the above-mentioned kneader. 400g NaOH was configured into 1200g solution and poured into the above-mentioned kneader, and the heating was turned on to raise the temperature to 110°C. After the temperature of the kneader reached 110° C., kneading was started for 1 hour. Then the kneading was stopped, and the obtained jelly was dried at 110° C. for 10 hours, then crushed and passed through an 80-mesh sieve to obtain a powder, which was packaged. Denote it as Product C.

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Abstract

The invention relates to a method for preparing a hydrolytic polyacrylonitrile filtrate reducer by an organic diamine cross-linking agent. The method comprises the following steps of: performing cohydrolysis reaction of organic diamine serving as the cross-linking agent, NaOH serving as a catalyst and waste acrylic raw materials to obtain a colloid substance, drying the colloid substance, crushing, and sieving to obtain the hydrolytic polyacrylonitrile filtrate reducer, wherein the hydrolytic polyacrylonitrile filtrate reducer comprises the following components in percentage by weight: 4 to 10 percent of organic diamine, 30 to 50 percent of waste acrylic fibers, 15 to 30 percent of NaOH and the balance of water. By the hydrolytic polyacrylonitrile filtrate reducer, the defect of unstable quality of products in the conventional production process is overcome, so the hydrolytic polyacrylonitrile filtrate reducer has the characteristics of high water solubility, low filter loss, stable quality, simple preparation process and the like.

Description

technical field [0001] The invention relates to a preparation method of a fluid loss reducer for drilling fluid, which is prepared from an organic diamine cross-linked polyacrylonitrile hydrolyzate, especially a drilling fluid with high stability and high fluid loss control effect additive. 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 bottom layer. 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. The raw materials for processing hydrolyzed polyacrylon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/24C08K5/17C08F20/44C08F8/12C09K8/035
Inventor 张文郁郑利强
Owner SHANDONG UNIV
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