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Aspartic acid-itaconic acid copolymer and synthetic method thereof

A technology of itaconic acid copolymer and aspartic acid, which is applied in chemical instruments and methods, water/sludge/sewage treatment, scale removal and water softening, etc., can solve the problem of difficult separation of solvent and product and poor scale inhibition performance. , slow reaction speed and other problems, to achieve the effect of no solvent separation, stable product performance and fast reaction speed

Active Publication Date: 2015-01-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the modification status quo of the above-mentioned polyaspartic acid, the present invention provides a kind of aspartic acid-itaconic acid copolymer and its synthetic method, and it can solve existing method when raw material is modified and existing reaction speed is slow, produces Low rate, CaCO 3 Defects such as poor scale inhibition performance and difficult separation of solvent and product

Method used

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  • Aspartic acid-itaconic acid copolymer and synthetic method thereof
  • Aspartic acid-itaconic acid copolymer and synthetic method thereof
  • Aspartic acid-itaconic acid copolymer and synthetic method thereof

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specific Embodiment approach 1

[0009] Specific embodiment one: the structural formula of the aspartic acid-itaconic acid copolymer of the present embodiment is The range of x / (x+y) is 0.1-1, and the range of x+y is 3-100. In this embodiment, the optimum range of x / (x+y) is 0.5-0.9, and the optimum range of x+y is 7-70.

specific Embodiment approach 2

[0010] Specific embodiment two: this embodiment synthesizes aspartic acid-itaconic acid copolymer according to the following steps, with aspartic acid and itaconic acid as raw materials, the ratio of the stoichiometric number of aspartic acid and itaconic acid is 1:10~10:1, add a small amount of catalyst and an appropriate amount of organic solvent to the raw material, under the conditions of microwave frequency of 915±50MHz or 2450±50MHz, microwave power of 200~10000W, radiation reaction for 3~40min, the reaction During the process, all solvents are recovered to obtain an intermediate, which is further alkaline hydrolyzed to obtain an aspartic acid-itaconic acid copolymer after washing with pure water to separate the catalyst. The ratio of the stoichiometric number of the catalyst to the reactant is 0.01-0.5; the ratio of the stoichiometric number of the organic solvent to the reactant is 0.10-3.0.

[0011] In the synthesis process, the reaction time will be shortened with th...

specific Embodiment approach 4

[0016] Specific embodiment four: add aspartic acid and itaconic acid to total 0.2mol in the three-neck round bottom flask, the ratio of aspartic acid and itaconic acid stoichiometric number is 2: 1, add methyl vinyl sulfone 18mL, press Table 2 takes different types of catalysts, the ratio of the stoichiometric number of the catalyst to the raw material is 0.05, the microwave power is 1200W, and the reaction time is 6min, and a dark brown fluffy product is obtained. At this time, the solvent is all recovered, and the product is rinsed with 120mL pure water Then add 36ml of 3mol / L NaOH to hydrolyze the product, adjust the pH of the solution to be neutral, filter, add excess absolute ethanol to the filtrate to dehydrate the product, collect the precipitate and dry it in vacuum at 70°C to obtain aspartic acid-itaconic acid copolymer. The results of the research on the scale inhibition effect of the obtained copolymer and commercial polyaspartic acid on calcium carbonate are listed...

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Abstract

The invention discloses an aspartic acid-itaconic acid copolymer and a synthetic method thereof and relates to a polyaspartic acid modified product which is used as a water treatment agent and the synthetic method thereof. The invention aims at overcoming the defects that existing polyaspartic acid modified products are complex in synthetic process, slow in reaction speed, unstable in product performance, low in CaCO3 crustation inhibitor efficiency and the like. The structural formula of the aspartic acid-itaconic acid copolymer is as shown in the specification. The synthetic process comprises the following steps: by using aspartic acid and itaconic acid as raw materials, adding a small amount of a catalyst and a proper amount of an organic solvent under microwave conditions of 915+-50MHz or 2450+ / -50MHz and 200-10000W; radiating for 3-40 minutes to synthesize an intermediate; recovering all organic solvent in form of gas; and washing the intermediate by pure water to separate the catalyst so as to further carry out basic hydrolysis to obtain the aspartic acid-itaconic acid copolymer. The aspartic acid-itaconic acid copolymer and the synthetic method disclosed by the invention have the advantages of being simple in process, fast in reaction speed, energy-saving and less in pollution and the product performance is remarkably improved.

Description

Technical field: [0001] The invention relates to an aspartic acid-itaconic acid copolymer and a synthesis method thereof, in particular to an aspartic acid-itaconic acid copolymer which can be used as a water treatment agent and a synthesis method thereof. Background technique: [0002] The environmental friendliness of water treatment agent polyaspartic acid makes it a research hotspot in recent years. at lower Ca 2+ Under the condition of high concentration, it has good inhibitory performance on calcium sulfate, barium sulfate, calcium carbonate and calcium phosphate scaling. However, some studies have shown that: at higher Ca 2+ At the concentration and temperature, the scale inhibition performance of polyaspartic acid still has a certain gap compared with the currently used phosphorus-containing scale inhibitors and other partially biodegradable scale inhibitors, especially in the inhibition of CaCO 3 aspect. In order to enhance the scale inhibition performance of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C02F5/12
Inventor 张玉玲王吉龙倪世清黄帅斌胡志光李研冯雪
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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