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Castor oil-based quaternary ammonium salt anti-mud agent and preparation method thereof

A castor oil-based, anti-mud agent technology, applied in the field of concrete admixtures and building materials, can solve the problems of toxic and harmful chemical reagents, poor concrete performance, high operation risk, etc., and achieve low synthesis cost and post-processing cost. The effect of adsorption and reduction of dosage

Active Publication Date: 2019-12-31
YANCHENG INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are related researches on anti-mud agent and anti-mud type superplasticizer in China, which solve the problem of poor performance of concrete due to excessive mud content to a certain extent.
The existing preparation process of quaternary ammonium salt type anti-mud agent involves toxic and harmful chemical reagents, or high temperature reaction, poor environmental protection, serious pollution and high risk of operation

Method used

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  • Castor oil-based quaternary ammonium salt anti-mud agent and preparation method thereof
  • Castor oil-based quaternary ammonium salt anti-mud agent and preparation method thereof
  • Castor oil-based quaternary ammonium salt anti-mud agent and preparation method thereof

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preparation example Construction

[0030] The preparation reaction of the castor oil-based quaternary ammonium salt anti-mud agent is shown in Reaction Formula II:

[0031]

[0032] The preparation method of described castor oil-based quaternary ammonium salt anti-mud agent, concrete steps are as follows:

[0033] (1) Add castor oil and catalyst NaOH into the reaction vessel, pass nitrogen gas for 5 minutes, add N,N-dimethyl-1,3-propanediamine dropwise while stirring at room temperature, and raise the temperature to 65-90 °C, react for 5-10 hours.

[0034] (2) The reaction product obtained in (1) is washed with distilled water, then left standstill, removes the turbid liquid of the lower floor, and washes repeatedly like this, until the lower floor is clarified, removes the lower floor, and retains the ricinoleic acid amide crude product of the upper floor.

[0035] (3) Vacuum drying the crude ricinoleic acid amide to remove excess water to obtain ricinoleic acid amide.

[0036] (4) Weigh the ricinoleic ac...

Embodiment 1

[0038] The preparation of embodiment 1 castor oil base amide

[0039] 10g castor oil is subjected to vacuum distillation to remove water and other solvents in the castor oil, then the treated castor oil is added to a four-necked flask with a mechanical stirring device, N,N-dimethyl-1, 3-Propylenediamine was reacted with catalyst NaOH at 80°C for 8 hours under stirring conditions to obtain ricinoleic acid amide.

[0040] Wherein, the molar ratio of N,N-dimethyl-1,3-propanediamine to castor oil is 3:1, and the amount of the catalyst is 6% of the weight of the reactant castor oil.

[0041] The yield of the product ricinoleyl amide was 68.38%.

Embodiment 2

[0042] The preparation of embodiment 2 castor oil base amides

[0043] 10g castor oil is subjected to vacuum distillation to remove water and other solvents in the castor oil, then the treated castor oil is added to a four-necked flask with a mechanical stirring device, N,N-dimethyl-1, 3-Propylenediamine was reacted with catalyst NaOH at 80°C for 8 hours under stirring conditions to obtain ricinoleic acid amide.

[0044] Wherein, the molar ratio of N,N-dimethyl-1,3-propanediamine to castor oil is 4:1, and the amount of catalyst used is 6% of the weight of reactant castor oil.

[0045] The yield of the product ricinoleylamide was 72.2%.

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Abstract

The invention discloses a castor oil-based quaternary ammonium salt anti-mud agent and a preparation method thereof. The anti-mud agent is prepared from ricinoleic acid, N, N-dimethyl-1, 3-propane diamine and epoxy chloropropane; and the specific preparation method comprises the following steps: putting castor oil and a catalyst into a reaction container, introducing nitrogen, dropwise adding N, N-dimethyl-1, 3-propane diamine while stirring at room temperature, heating for reaction after dropwise adding is finished, and treating to obtain ricinoleic acid amide; and putting ricinoleic acid amide into a reaction container, introducing nitrogen, slowly dropwise adding epoxy chloropropane while stirring, controlling the temperature at 48 DEG C, heating to 50 DEG C after dropwise adding is finished, carrying out heat preservation reaction for 1 hour, removing excessive epoxy chloropropane with n-hexane, and carrying out vacuum drying to obtain a finished product. The anti-mud agent can quickly adsorb mud, reduce the mixing amount of polycarboxylate superplasticizers and ensure the performance of concrete, and the preparation method has the advantages of easily available synthesis raw materials, mild reaction conditions, biodegradable product, no influence on the environment, and low synthesis cost and post-treatment cost.

Description

technical field [0001] The invention belongs to the field of building materials and relates to the field of concrete admixtures, in particular to a castor oil-based quaternary ammonium salt anti-mud agent and a preparation method thereof. Background technique [0002] As an important component of concrete, concrete admixtures play an important role in the concrete mixing process. In particular, the concrete water reducer has brought a huge leap in the workability, mechanical properties and durability of concrete. Polycarboxylate superplasticizer has the advantages of environmental protection, low dosage, high water reducing rate, good slump retention, easy adjustment of molecular structure, high performance and great potential, and is widely used in engineering. However, polycarboxylate superplasticizers also face many technical difficulties in practical application, among which the high sensitivity to soil is the most prominent. However, due to the massive development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D301/00C07D303/36C04B24/12
CPCC07D301/00C07D303/36C04B24/124Y02P20/584
Inventor 颜秀花许伟石文艳唐兰勤邵荣
Owner YANCHENG INST OF TECH
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