Composite aspartic acid polymer, and preparation method and application thereof

An aspartic acid and polymer technology, applied in the agricultural field, can solve the problems of difficulty in meeting the requirements of stable yield and quality of crisp pears, lack of scientificity and pertinence, poor water and fertilizer retention effects, etc. Stretching, soil improvement effect

Active Publication Date: 2019-01-29
湖北茂盛生物有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the quality of soil conditioners is uneven. Although polymer soil conditioners have good water and fertilizer retention effects, they have poor heat resistance and are easily decomposed, resulting in poor soil conditioning effects. Although inorganic soil conditioners are not easy to decompose, soil conditioning effects are better. , but the effect of water and fertilizer retention is poor. At the same time, the soil conditioner for Dangshan pear often relies on traditional experience, lacks scientificity and pertinence, and is difficult to meet the requirements of stable yield and quality of pear

Method used

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  • Composite aspartic acid polymer, and preparation method and application thereof
  • Composite aspartic acid polymer, and preparation method and application thereof
  • Composite aspartic acid polymer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of composite aspartic acid polymer, comprising the steps of:

[0026] S1. Mix 1kg lactic acid and 20kg triethylene glycol, prepolymerize for 2h, prepolymerize at 145°C, prepolymerize at 3kPa, remove water, add 0.2kg terephthalic acid, melt polycondensate for 4h, polycondensate The temperature is 170°C, the polycondensation pressure is 65Pa, the temperature is lowered, and the chloroform is dissolved to obtain a prefabricated material;

[0027] S2. Stir 20kg of polysuccinimide and 50kg of 2.2mol / L sodium hydroxide solution for 10min at a stirring temperature of 40°C, adjust the pH of the system to 4.5-5 with a 75wt% phosphoric acid solution, and add 25kg of prefabricated material Mix evenly, add 1 kg of ethylene glycol diglycidyl ether and react for 2 hours at a reaction temperature of 50° C., precipitate with methanol, purify, and dry in vacuum to obtain a composite aspartic acid polymer.

[0028] A soil conditioner for pear planting, its raw mater...

Embodiment 2

[0031] A preparation method of composite aspartic acid polymer, comprising the steps of:

[0032] S1. Mix 4kg of lactic acid and 10kg of triethylene glycol, prepolymerize for 4 hours, prepolymerize at 135°C, prepolymerize at 5kPa, remove water, add 0.1kg of terephthalic acid, melt and polycondense for 10 hours, polycondensate The temperature is 160°C, the polycondensation pressure is 75Pa, the temperature is lowered, and the chloroform is dissolved to obtain a prefabricated material;

[0033] S2. Stir 10kg of polysuccinimide and 80kg of 1.8mol / L sodium hydroxide solution for 20min at a stirring temperature of 30°C, adjust the pH of the system to 4.5-5 with a concentration of 85wt% phosphoric acid solution, and add 15kg of prefabricated material Mix evenly, add 1.6 kg of ethylene glycol diglycidyl ether and react for 1 hour at a reaction temperature of 59° C., precipitate with methanol, purify, and dry in vacuum to obtain a composite aspartic acid polymer.

[0034] A soil cond...

Embodiment 3

[0037] A preparation method of composite aspartic acid polymer, comprising the steps of:

[0038] S1. Mix 2kg of lactic acid and 18kg of triethylene glycol, prepolymerize for 2.5h, prepolymerize at 142°C, prepolymerize at 3.5kPa, remove water, add 0.18kg of terephthalic acid, melt polycondensate for 6h , the polycondensation temperature is 166°C, the polycondensation pressure is 68Pa, the temperature is lowered, and the chloroform is dissolved to obtain a prefabricated material;

[0039] S2. Stir 18kg of polysuccinimide and 60kg of 2.1mol / L sodium hydroxide solution for 12min at a stirring temperature of 37°C, adjust the pH of the system to 4.5-5 with a 78wt% phosphoric acid solution, and add 22kg of prefabricated material Mix evenly, add 1.2 kg of ethylene glycol diglycidyl ether and react for 1.7 hours at a reaction temperature of 52° C., precipitate with methanol, purify, and dry in vacuum to obtain a composite aspartic acid polymer.

[0040] A soil conditioner for pear plan...

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Abstract

The invention discloses a preparation method of a composite aspartic acid polymer. The preparation method comprises the following steps: mixing lactic acid and triethylene glycol, carrying out pre-polymerization, carrying out water removal treatment, adding terephthalic acid, carrying out melt polycondensation, carrying out cooling, and carrying out dissolution by using chloroform to obtain a prefabricated material; and stirring polysuccinimide and sodium hydroxide, regulating the pH value of the system to be 4.5-5, adding the prefabricated material, uniformly carrying out mixing, adding ethylene glycol diglycidyl ether to carry out a reaction, carrying out precipitating by using methanol, carrying out purifying, and carrying out vacuum drying to obtain the composite aspartic acid polymer. The invention further discloses a soil conditioner for crisp pear planting. The soil conditioner is prepared from the following raw materials in parts by weight: 60-80 parts of wormcast, 10-20 partsof urea, 15-30 parts of fishbone meal, 5-15 parts of plant ash, 10-15 parts of medical stone powder, 10-15 parts of bamboo charcoal powder, 5-15 parts of sodium silicate, 5-15 parts of ammonium molybdate, 4-5 parts of borax and 2-4 parts of the obtained composite aspartic acid polymer.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a composite aspartic acid polymer and its preparation method and application, and a soil conditioner for pear planting and its preparation method. Background technique [0002] Originally produced in Dangshan, Anhui Province, Suli is the oldest local pear variety. It is deeply loved by consumers at home and abroad for its smooth surface, large and plump, juicy and crisp, rich in nutrition and pollution-free. Crispy pears are rich in sugar, minerals, organic acids and multivitamins, and are extremely nutritious. An important raw material for the food industry. With the rapid development of various fruit trees, the variety of fruits in the market is becoming more and more abundant. However, the extensive management of Dangshansu pears has led to a decline in its competitiveness in the fruit market, a gradual decline in sales prices, and a significant reduction in production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C09K17/40C09K17/18C09K101/00
CPCC08G73/1092C09K17/18C09K17/40C09K2101/00
Inventor 严春兰翟情情
Owner 湖北茂盛生物有限公司
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