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Method for synthesizing butylated amino resin from pentahydroxymethyl melamine

A technology of pentamethylol melamine and amino resin, which is applied in chemical instruments and methods, chemical/physical processes, chemical/physical/physical chemical processes, etc., can solve problems such as unfavorable environmental protection discharge, troublesome water treatment, and unfavorable filtration. Achieve the effect of reducing subsequent filtration requirements and costs, and reducing the amount of wastewater treatment

Active Publication Date: 2018-01-05
CHONGQING JIANFENG HAOKANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the above-mentioned synthetic method needs to use a large amount of lye, it causes a lot of trouble to the subsequent water treatment, increases the treatment process and cost, and is not conducive to environmental protection discharge.
In addition, the metal ions contained in the lye are also unfavorable for subsequent filtration

Method used

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  • Method for synthesizing butylated amino resin from pentahydroxymethyl melamine
  • Method for synthesizing butylated amino resin from pentahydroxymethyl melamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use pentamethylol melamine as raw material to synthesize butylated amino resin:

[0035] (1) According to the mol ratio of pentamethylol melamine: butanol, it is 1: 20 to drop into the butanol of the above-mentioned measurement in the above-mentioned reactor, add 36% hydrochloric acid to adjust the pH value to 3.5, add the above-mentioned pentamethylol melamine Melamine, heating up and regulating temperature is 85 ℃ of stirring (adjusting the reactor stirring frequency converter to 20Hz) to make it dissolve;

[0036] (2) after the completion of the reaction after the complete dissolving of pentamethylene melamine, keep warm for 2h;

[0037] (3) feed ammonia into the reaction kettle through the above-mentioned ammonia gas feeding device, detect the pH value and adjust the pH to be 9;

[0038] (4) Dealcoholization under normal pressure, the temperature is 100°C, and the time is 30min;

[0039] (5) Start the vacuum pump, control the vacuum degree to 0.08MPa, and the temp...

Embodiment 2

[0044] Step is with embodiment 1, difference is as follows:

[0045] In step (1), the molar ratio of pentamethylol melamine: butanol is 1: 10, the pH value is adjusted to 5, the temperature is raised to 70° C., and the reactor stirring frequency converter is adjusted to 30 Hz;

[0046] In step (2), keep warm for 2h;

[0047] In step (3), the pH value is 8.5;

[0048] In step (4), the temperature is 70°C and the time is 60min;

[0049] In step (5), the temperature is 80°C, the vacuum degree is 0.09MPa, and the dealcoholization and dehydration treatment is carried out for 2 hours;

[0050] In step (6), the added butanol quality is 20% of the pentamethylol melamine quality;

[0051] In step (7), the mass of diatomite added is 0.8% of the mass of pentamethylol melamine.

Embodiment 3

[0053] Step is with embodiment 1, difference is as follows:

[0054] In step (1), the molar ratio of pentamethylol melamine: butanol is 1: 8, the pH value is adjusted to 6, the temperature is raised to 50°C, and the reactor stirring frequency converter is adjusted to 10Hz;

[0055] In step (2), keep warm for 0.5h;

[0056] In step (3), the pH value is 8;

[0057] In step (4), the temperature is 110° C. and the time is 20 minutes;

[0058] In step (5), the temperature is 100°C, the vacuum degree is 0.07MPa, and the dealcoholization and dehydration treatment is 0.5h;

[0059] In step (6), the added butanol quality is 25% of the pentamethylol melamine quality;

[0060] In step (7), the mass of diatomite added is 1% of the mass of pentamethylol melamine.

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Abstract

The invention discloses a method for synthesizing butylated amino resin from pentahydroxymethyl melamine. The method comprises the following steps: adding butanol and pentahydroxymethyl melamine intoa reaction kettle in proportion; controlling the temperature and adding acid to regulate the pH value; introducing ammonia gas to regulate the pH value after reacting; controlling the temperature to perform normal-pressure dealcoholization; controlling the temperature to perform vacuum dealcoholization dehydration treatment; adding a stabilizer butanol; and filtering. The method obtains butylatedamino resin with special performances, remarkably reduces wastewater treatment amount and reduces production cost.

Description

technical field [0001] The invention relates to the environment-friendly synthesis of butylated amino resin. Background technique [0002] For the synthesis of etherified amino resins using melamine such as hexamethylolmelamine or tetramethylolmelamine, refer to the applicant’s previous patents or patent applications CN 103739563B, CN 103739803B, CN103709111B, CN105968283A, CN105968281A, CN105968282A and CN106008870A. In addition, CN106243300A and CN106349267A also disclose the synthesis method of etherified resin introduced by hybridization with flame retardant components. However, because the above synthetic method needs to use a large amount of lye, it causes a lot of trouble to the subsequent water treatment, increases the treatment process and cost, and is not conducive to environmental protection discharge. In addition, the metal ions contained in the lye are also unfavorable for subsequent filtration. Contents of the invention [0003] The object of the present in...

Claims

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Application Information

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IPC IPC(8): C08G12/42C08K3/34C08K3/00C08K3/36C08K3/38C08K3/22B01J19/00B01J19/26
Inventor 王文武胡劲松周建平张志轩
Owner CHONGQING JIANFENG HAOKANG CHEM
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