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A large cation coated flocculant and its preparation method

A large cation and flocculant technology, which is applied in the field of large cation coated flocculants and preparations for drilling fluids, can solve the problems of insufficient stability of flocculants, achieve strong anti-slump effects, improve stability, strong inhibition and excellent effects

Active Publication Date: 2022-04-19
保定市三拓化工产品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a large cationic coated flocculant and its preparation method to solve the problem of insufficient stability of flocculants in the prior art

Method used

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  • A large cation coated flocculant and its preparation method
  • A large cation coated flocculant and its preparation method
  • A large cation coated flocculant and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A preparation method of large cation coated flocculant, comprising the following steps:

[0037] 1) Add 100 parts of 30 wt% dimethyl diallyl ammonium chloride monomer aqueous solution into the reaction device, then add 0.02 parts of azodiisopropylimidazoline hydrochloride and stir evenly, and then pass nitrogen gas After 30 minutes, the reaction was heated in a water bath at 50° C. for 7 hours.

[0038] 2) After the reaction is completed, the reaction product is taken out, washed with ethanol, diluted with acetone, dried in an oven at 50° C. for 24 hours, crushed to obtain polydimethyldiallylammonium chloride for use.

[0039] 3), prepare 25wt% ammonium sulfate solution, use distilled water to prepare, preparation method is prior art, the applicant does not carry out detailed description here.

[0040] 4) 25 parts of dimethyl diallyl ammonium chloride monomer, 3 parts of dimethyl allyl p-methyl benzyl ammonium chloride monomer, 50 parts of acrylamide monomer, 20 parts ...

Embodiment 2

[0046] A preparation method of large cation coated flocculant, comprising the following steps:

[0047] 1) Add 100 parts of 40 wt% dimethyl diallyl ammonium chloride monomer aqueous solution into the reaction device, then add 0.05 parts of azodiisopropylimidazoline hydrochloride and stir evenly, and then pass nitrogen gas After 40 minutes, the reaction was heated in a water bath at 60° C. for 7 hours.

[0048] 2) After the reaction is completed, the reaction product is taken out, washed with ethanol, diluted with acetone, dried in an oven at 50° C. for 24 hours, crushed to obtain polydimethyldiallylammonium chloride for use.

[0049] 3) Prepare 28wt% ammonium sulfate solution using distilled water. The preparation method is prior art, and the applicant does not describe in detail here.

[0050] 4) 40 parts of dimethyl diallyl ammonium chloride monomer, 5 parts of dimethyl allyl p-methyl benzyl ammonium chloride monomer, 50 parts of acrylamide monomer, 20 parts Acrylic acid m...

Embodiment 3

[0056] A preparation method of large cation coated flocculant, comprising the following steps:

[0057] 1) Add 100 parts of 35 wt% dimethyldiallylammonium chloride monomer aqueous solution into the reaction device, then add 0.03 parts of azodiisopropylimidazoline hydrochloride and stir evenly, and then pass nitrogen gas After 30 minutes, the reaction was heated in a water bath at 50° C. for 7 hours.

[0058] 2) After the reaction is completed, the reaction product is taken out, washed with ethanol, diluted with acetone, dried in an oven at 50° C. for 24 hours, crushed to obtain polydimethyldiallylammonium chloride for use.

[0059] 3), prepare 26wt% ammonium sulfate solution, use distilled water to prepare, preparation method is prior art, the applicant does not carry out detailed description here.

[0060] 4) 30 parts of dimethyl diallyl ammonium chloride monomer, 3 parts of dimethyl allyl p-methyl benzyl ammonium chloride monomer, 50 parts of acrylamide monomer, 20 parts A...

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Abstract

The invention relates to a large cationic coated flocculant, which is coated with polydimethyldiallylammonium chloride and consists of dimethyldiallylammonium chloride monomer, dimethyldiallyl p-methyl A flocculant composed of a tetrapolymer formed by the polymerization of benzyl ammonium chloride monomer, acrylamide monomer and acrylic acid monomer. This technical scheme utilizes the advantages of dimethyl diallyl ammonium chloride, which has high positive charge density, non-toxicity, high efficiency, very stable at room temperature, and stable ring structure after polymerization. The cationic quaternary ammonium group on it is not only soluble in water, but also can react with oppositely charged electrons or colloids. After maintaining the thermal stability of the anionic copolymer and having strong resistance to temperature and salt, the use of dimethyl allyl Based on the non-hydrophilic cation characteristics of p-methylbenzyl ammonium chloride, the flocculated colloidal particles will not swell because they are easily soluble in water, resulting in instability of the colloidal particles after flocculation, which improves the stability of the flocculation effect.

Description

technical field [0001] The invention belongs to the technical field of flocculants, in particular to a large cation-coated flocculant for drilling fluid and a preparation method thereof. Background technique [0002] During the drilling process, the poking soil particles or cuttings produced by the drill bit during the working process will enter the drilling fluid and form colloidal particles, which increases the fluid resistance of the drilling fluid, thereby increasing the loss of the drill bit. Therefore, in the drilling process, it is necessary to add flocculants to moderately flocculate the colloidal particles in the drilling fluid, reduce the fluid resistance of the drilling fluid, and maintain low solids in the drilling fluid. [0003] Commonly used flocculants are divided into two categories, one is inorganic flocculants, such as salt, gypsum, polyaluminum, etc., and the other is organic flocculants, mostly polymers, surfactants, various polycations, polyanions , Po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C08F220/56C08F226/02C08F220/06
CPCC09K8/035C08F220/56C09K2208/28C08F226/02C08F220/06
Inventor 吴存仁
Owner 保定市三拓化工产品有限公司
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