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7-hydroxyl chelating cross-linking agent and preparation method thereof

A technology of crosslinking agent and hydroxyl, which is applied in the field of 7-hydroxyl chelating crosslinking agent and its preparation, can solve the problem of few boron ions, achieve the effect of increasing content and ensuring stability

Active Publication Date: 2022-04-29
湖北菲特沃尔科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also few research reports on how to use chelating agents to effectively treat boron ions

Method used

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  • 7-hydroxyl chelating cross-linking agent and preparation method thereof
  • 7-hydroxyl chelating cross-linking agent and preparation method thereof
  • 7-hydroxyl chelating cross-linking agent and preparation method thereof

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preparation example Construction

[0037] The present invention also provides a kind of preparation method of 7-hydroxyl chelating cross-linking agent, such as figure 1 shown, including the following steps:

[0038] Step 1: Mix the caustic soda and water in parts by weight in agent c to obtain lye for later use, then add the short-chain chlorohydrin and lye in parts by weight in agent c to 2-hydroxyl-1,3-propylenediamine dropwise for reaction to obtain 5-hydroxypropylenediamine;

[0039] Step 2: Continue to drop short-chain chlorohydrins in the aqueous solution of 5-hydroxypropylenediamine obtained in step 1 to react, and obtain 7-hydroxypropylenediammonium quaternary ammonium salt after the dropwise reaction, wherein the 5-hydroxypropylenediamine The mass ratio of diamine aqueous solution and the short-chain chlorohydrins added dropwise is 1000:160-218;

[0040] Step 3: Mix the 7-hydroxypropylene diammonium quaternary ammonium salt obtained in step 2 with pentaerythritol in a mass ratio of 10:1-3 to obtain a...

Embodiment 1

[0057] Add 362Kg of demineralized water into the container A equipped with agitator, start the agitator, add 224Kg of potassium hydroxide until completely dissolved, then transfer the lye to the head tank B2 for standby.

[0058] Add 324Kg of chloroethanol to the head tank B1 for later use.

[0059] Add 90Kg of 2-hydroxyl-1,3-propylenediamine to reactor B equipped with agitator, heating system and cooling system, heat to 42°C, start the agitator, open the valve of head tank B1, and dropwise add Chlorohydrin, the dropping rate is 1-2 liters / minute. After 30 minutes of dropwise addition, open the valve of head tank B2, and dropwise add lye to reactor B at a rate of 1.5-3 liters / minute. During the dropping process, when the temperature reaches 50°C, turn on the cooling system for cooling, and control the temperature between 45°C and 55°C. The chloroethanol was dripped before the lye, and the total time for the dropwise addition was 227 minutes; the time for the lye dropwise was...

Embodiment 2

[0067] Add 426Kg of demineralized water into the container A equipped with agitator, start the agitator, add 160Kg of sodium hydroxide to completely dissolve, then transfer the prepared lye to the head tank B2 for subsequent use.

[0068] Add 324Kg of chloroethanol to the head tank B1 for later use.

[0069] Add 90Kg of 2-hydroxyl-1,3-propylenediamine to reactor B equipped with agitator, heating system and cooling system, heat to 42°C, start the agitator, open the valve of head tank B1, and dropwise add Chlorohydrin, the dropping rate is 1-2 liters / minute. After 30 minutes of dropwise addition, open the valve of head tank B2, and dropwise add lye to reactor B at a rate of 1.5-3 liters / minute. During the dropping process, when the temperature reaches 50°C, turn on the cooling system for cooling, and control the temperature between 45°C and 55°C. The chloroethanol was dripped before the lye, and the time for the dropwise addition was 200 minutes in total; the time for the lye ...

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Abstract

The invention discloses a 7-hydroxyl chelating cross-linking agent and a preparation method thereof, and the preparation method is realized by the following steps: step 1, adding caustic alkali into water to obtain alkali liquor for later use, dropwise adding short-chain chlorohydrin and the alkali liquor into 2-hydroxy-1, 3-propane diamine, and reacting to obtain 5-hydroxyl propane diamine; 2, continuously dropwise adding short-chain chlorohydrin into the 5-hydroxy propane diamine aqueous solution for reaction, and obtaining 7-hydroxy propane diammonium quaternary ammonium salt after dropwise adding reaction; and 3, uniformly mixing the 7-hydroxy propylene diammonium quaternary ammonium salt with pentaerythritol according to a ratio to obtain a 7-hydroxy chelating cross-linking agent, and carrying out a firm complexation reaction on seven hydroxyls contained in the chemical structure of the 7-hydroxy chelating cross-linking agent and boron ions to ensure the stability of the boron ions in the sewage. The content of boron ions in the complexing pollution of the 7-hydroxyl chelating cross-linking agent is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of chelating agents for oilfield sewage treatment and reuse, and in particular relates to a 7-hydroxyl chelating crosslinking agent and a preparation method thereof. Background technique [0002] During the development and production of oil and gas fields, a large amount of water resources are consumed, and a large amount of oilfield sewage is also produced. With the development of oilfield industrial technology and the improvement of requirements for comprehensive utilization of water resources, most of the sewage needs to be treated and then reused in the production of oil and gas fields to reduce sewage discharge and save water resources. [0003] The treatment and reuse of oilfield sewage mainly focus on oil removal, slag removal, scale prevention and scale inhibition. Among them, scale inhibition is the most critical factor, because most of the oilfield sewage needs to be injected into the high-tempera...

Claims

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Application Information

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IPC IPC(8): C02F1/58
CPCC02F1/58
Inventor 张杰
Owner 湖北菲特沃尔科技有限公司
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