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Modified lignosulfonate pesticide dispersing agent and its preparation method

A lignosulfonate and dispersant technology, which is applied in the fields of botany equipment and methods, chemical instruments and methods, and biocides, can solve the problems of unsure process parameters, difficult control, and high cost of modification, and achieves Smooth and uniform appearance, good water solubility and low production cost

Inactive Publication Date: 2008-03-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is complicated in process, difficult in control, and high in modification cost, and its specific process parameters cannot be ascertained at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Weigh 1000g of lignosulfonate, add 1500g of water and mix well to form a solution with a concentration of 40%, add 5g of NaOH to adjust the pH value of the system to 9.0, add 1g of FeSO 4 , 2gFe 2(SO 4 ) 3 and 40gKMnO 4 , heated to 85°C and reacted for 1.5 hours; added 5g NaOH to adjust the pH value of the system to 10.0, added 80g sodium metabisulfite, and reacted at a temperature of 90°C for 4 hours; added 20gH 2 SO 4 Adjust the pH value of the system to 4.0, add 50g of formaldehyde, and react at a temperature of 95°C for 2 hours; add 20g of emulsified silicone oil, keep stirring at a temperature of 80°C for 1 hour, then cool down and discharge.

Embodiment 2

[0037] Embodiment 2: Weigh 1000g of lignosulfonate, add 1000g of water and mix well to a solution with a concentration of 50%, add 10gNaOH to adjust the pH value of the system to 10.0, add 10gFe 2 (SO 4 ) 3 and 40gH 2 o 2 , 10g KIO 3 , heated to 95°C and reacted for 0.5 hours; added 10g NaOH to adjust the pH value of the system to 11.0, added 50g sodium sulfite and 50g sodium bisulfite, and reacted at a temperature of 95°C for 2 hours; added 10g HCl to adjust the pH value of the system to 5.0, added 40g of urea was reacted at a temperature of 90°C for 1 hour; 5g of dodecylamine was added, kept stirring at a temperature of 85°C for 2 hours, then cooled and discharged.

Embodiment 3

[0038] Embodiment 3: take lignosulfonate 1000g, add water 2333g and mix well to be a solution with a concentration of 30%, add 5gNaOH and 5g ammonia water to adjust the pH value of the system to 9.5, add 3g Cu(NO3)2, 3g Fe 2 (SO 4 ) 3 and 20gK 2 Cr 7 o 4 , and reacted for 2 hours after heating up to 80°C; adding 20g of ammonia water to adjust the pH value of the system to 11.0, adding 10g of sodium bisulfite, 5g of sodium metabisulfite and 5g of sodium sulfite, and reacting for 3 hours at a temperature of 90°C; adding 15g of citric acid to shake the system Adjust the pH value to 6.0, add 30g of acrylic acid, react at a temperature of 90°C for 2 hours; add 15g of n-butanol, keep stirring at a temperature of 90°C for 1.5 hours, then cool down and discharge.

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PUM

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Abstract

The present invention discloses a preparation method of modified lignosulfate agricultural chemical dispersion agent. Said preparation method includes the following steps: (1), adding water and making lignosulfonate be mixed with water, uniformly stirring them to obtain lignosulfonate solution whose concentration is 40%, utilizing alkaline regulator to regulate pH valve of system to 8.0-10.0, adding redox initiator and oxidant, heating to 80-100deg.C and making reaction for 0.5-2h; (2), using alkaline regulato to regulate pH valve of system to 9.0-11.0, adding sulfonating agent and making reaction for 2-4h at 90-100deg.C; (3), using acid regulato to regulate pH value of system to 4.0-6.0, adding polycondensation reaction monomer and making reaction for 1-3h at 90-100deg.C; and (4), adding modifying agent, after above-mentioned materials are stirred and heat-insulated for 1-2h, cooling so as to obtain the invented product.

Description

technical field [0001] The invention relates to a pesticide dispersant and a preparation method thereof, in particular to a pesticide dispersant prepared by modifying the lignin sulfonate, a recovered product of acid pulping waste liquid, as a raw material. Background technique [0002] According to the estimates of the Food and Agriculture Organization of the United Nations (FAO), the annual loss of crops due to pests and diseases in the world is about 10% to 30% of the total harvest of the year; as an important means of preventing and controlling pests and weeds and protecting crops, pesticides play an irreplaceable role in agricultural production important role. Adjuvants play an important role in exerting the efficacy of pesticides and reducing environmental pollution caused by pesticides. The development of pesticides is inseparable from the development of adjuvants. At present, pesticide preparations are developing toward safe, low-toxicity, high-efficiency, dust-free...

Claims

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Application Information

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IPC IPC(8): A01N25/00B01F17/50C09K23/50
Inventor 邱学青庞煜霞杨东杰楼宏铭欧阳新平易聪华周明松
Owner SOUTH CHINA UNIV OF TECH
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