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Copolymerization derivative of poly-asparagic acid and synthetic method

A technology of polyaspartic acid and synthesis method, which is applied in the field of polyaspartic acid copolymer derivatives and its synthesis, can solve the problems of no significant improvement in product scale inhibition performance, slow reaction speed, unstable performance, etc., and achieve shortening The effect of reaction time, fast reaction speed and stable product performance

Inactive Publication Date: 2005-11-16
哈尔滨云水工大环保科技股份有限公司
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Problems solved by technology

[0005] In view of the modification status of the above-mentioned polyaspartic acid, the present invention provides a polyaspartic acid copolymer derivative and its synthesis method, which can solve the problem of slow reaction speed and low yield when the raw materials are modified by existing methods. , The scale inhibition performance of the product has no significant improvement and the defects of unstable performance

Method used

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  • Copolymerization derivative of poly-asparagic acid and synthetic method

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specific Embodiment approach 1

[0007] Embodiment 1: The structural formula of the polyaspartic acid copolymer derivative of the present embodiment is:

[0008] In the formula, R is H, (CH 3 ) 2 CH, (CH 3 ) 2 CHCH 2 、CH 3 CH 2 CH(CH 3 ), HOCH 2 、CH 3 CH(OH), HSCH 2 or HOOCCH 2 CH 2 , the range of y / (y+x) is 0.1-0.9, and the range of x+y is 7-70. The optimum range of y / (y+x) in this embodiment is 0.1-0.5, and the optimum range of x+y is 9-30.

specific Embodiment approach 2

[0009] Specific embodiment two: this embodiment synthesizes polyaspartic acid copolymer derivatives according to the following steps: with aspartic acid and For raw materials, where R is H, (CH 3 ) 2 CH, (CH 3 ) 2 CHCH 2 、CH 3 CH 2 CH(CH 3 ), HOCH 2 、CH 3 CH(OH), HSCH 2 or HOOCCH 2 CH 2 , aspartic acid and The stoichiometric number is 1.0-99.9, using microwave technology, under the conditions of microwave frequency 915±50MHz or 2450±50MHz, microwave power 100-30000W, add catalyst and solvent to the reactant, and radiate reaction for 1-40min. The precursor of the polyaspartic acid copolymer derivative can be obtained, and the polyaspartic acid copolymer derivative can be obtained by hydrolyzing the precursor, wherein the stoichiometric number of the catalyst and the reactant is 0.01 to 1.00, and the chemical ratio of the solvent and the reactant The metering number is 0.10~9.99, and the reaction equation is as follows:

[0010]

[0011] Aspartic acid Other am...

specific Embodiment approach 4

[0017] Specific embodiment four: Add aspartic acid and serine to a total of 0.18mol in a single-mouthed round bottom flask, aspartic acid and serine stoichiometric number is 7: 3, with NaH 2 PO 4 As a catalyst, the stoichiometric number of the catalyst and the raw material is 0.05, add 16ml of dimethylformamide, the microwave power is 720W, and when the microwave radiation time (Table 2) is different, fluffy products of different colors are obtained, and 32ml of 3mol / L NaOH is added Dissolve the product, adjust the pH of the solution to be neutral, filter, add the filtrate of the product to 250 ml of absolute ethanol, collect the precipitate, and dry it in vacuum at 70° C. to obtain a polyaspartic acid copolymer derivative.

[0018] radiation time

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Abstract

A modified polyasparagic acid is prepared through preparing intermediate from asparagic acid, a compound, catalyst and solvent by radiating at 50Hz or 2450+ / -50 Hz and 100-3000W for 1-40 min, and hydrolyzing.

Description

Technical field: [0001] The invention relates to a modified polyaspartic acid and a synthesis method thereof, in particular to a polyaspartic acid copolymer derivative 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; 2 Corrosion has a certain corrosion inhibition effect. 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 sca...

Claims

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Application Information

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IPC IPC(8): C08G69/08
Inventor 黄君礼张玉玲王鹏程志辉杨士林陶虎春
Owner 哈尔滨云水工大环保科技股份有限公司
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