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Production process of low-chloride amido-trimethylene phosphonic acid (ATMP)

A technology of low-chlorine amino trimethylene phosphonic acid and chloroamino trimethylene phosphonic acid is applied in the field of production technology of amino trimethylene phosphonic acid, which can solve the problem of high chloride ions, and achieve the effects of reducing content and expanding application prospects.

Inactive Publication Date: 2017-02-15
南通联膦化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies of the prior art, and now provides a method that solves the problem of high chloride ions in the amino trimethylene phosphoric acid product prepared by the prior art, and develops the production of environmentally friendly low-chlorine amino trimethylene phosphonic acid. craft

Method used

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  • Production process of low-chloride amido-trimethylene phosphonic acid (ATMP)
  • Production process of low-chloride amido-trimethylene phosphonic acid (ATMP)
  • Production process of low-chloride amido-trimethylene phosphonic acid (ATMP)

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Embodiment 1

[0024] A production process of low-chlorine amino trimethylene phosphonic acid, the specific steps are: cleaning the reactor and related equipment, closing the bottom valve of the reactor; pumping 2200 kilograms of 80% liquid phosphorous acid into the reactor. Open the solid feeding port, add 600 kg of food-grade ammonium bicarbonate, after adding, open the condenser, stir, and heat up. When the temperature rises to 40°C, add 600 kg of hydrochloric acid dropwise, and the dropwise addition process controls the micro-negative pressure state in the reactor to be -0.02~-0.01mpa, and the dropwise addition time is 4 hours; after the dropwise addition, continue to heat up to 80°C, Start to drop 3500 kg of formaldehyde solution, control the temperature of the feed liquid in the kettle between 85-95°C during the dropping process, and control the dropping time at 4 hours; Warm concentration until the feed liquid is concentrated to a viscous state, and the concentration time is controlle...

Embodiment 2

[0026] A production process of low-chlorine amino trimethylene phosphonic acid, the specific steps are: cleaning the reaction kettle and related equipment, closing the bottom valve of the reaction kettle; pumping 2500 kilograms of 80% liquid phosphorous acid into the reaction kettle. Open the solid feeding port, add 700 kg of food-grade ammonium bicarbonate, after the addition is complete, open the condenser, stir, and heat up. When the temperature rises to 50°C, add 500 kg of hydrochloric acid dropwise, and the dropwise addition process controls the micro-negative pressure state in the reactor to be -0.02~-0.01mpa, and the dropping time is 4.5 hours; after the dropwise addition, continue to heat up to 90°C, Start to drop 3200 kg of formaldehyde solution, control the temperature of the feed liquid in the kettle between 95-105°C during the dropping process, and control the dropping time at 4 hours; Warm concentration until the material liquid is concentrated to a viscous state,...

Embodiment 3

[0028] A production process of low-chlorine amino trimethylene phosphonic acid comprises the following steps: cleaning the reactor and related equipment, closing the bottom valve of the reactor; pumping 3000 kilograms of 80% liquid phosphorous acid into the reactor. Open the solid feeding port, add 800 kg of food-grade ammonium bicarbonate, after adding, open the condenser, stir, and heat up. When the temperature rises to 50°C, add 400 kg of hydrochloric acid dropwise, the dropwise addition process controls the micro-negative pressure state in the reactor to be -0.02~-0.01mpa, and the dropwise addition time is 4.5 hours; after the dropwise addition, continue to heat up to 100°C, Start to drop 3000 kg of formaldehyde solution, control the temperature of the feed liquid in the kettle between 95-105°C during the dropping process, and control the dropping time at 4 hours; Warm concentration until the material liquid is concentrated to a viscous state, and the concentration time is...

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Abstract

The invention discloses a production process of low-chloride amido-trimethylene phosphonic acid (ATMP). According to the production process, phosphorous acid, formaldehyde, hydrochloric acid and ammonium bicarbonate are taken as raw materials so as to prepare ATMP through the following steps. The invention provides a brand-new production process of ATMP. According to a traditional process for preparing ATMP, ammonium chloride, formaldehyde and phosphorous acid are generally used as raw materials; due to intrinsic properties of the raw materials, the chloride ion content of the prepared product is generally about 1%. However, according to the production process provided by the invention, raw materials are replaced, the chloride ion content of prepared ATMP is about 0.1% and is greatly lowered, and the application prospect of ATMP is also expanded.

Description

technical field [0001] The invention relates to a production process of amino trimethylene phosphonic acid, in particular to a production process of low-chlorine amino trimethylene phosphonic acid. Background technique [0002] Aminotrimethylenephosphonic acid (ATMP) is a water treatment agent with good chelating, low-limit inhibition and lattice distortion effects. It can prevent the formation of scaling salts in water, especially the formation of calcium carbonate scale. It is chemically stable in water and not easily hydrolyzed. When the concentration in water is high, it has good corrosion inhibition effect. ATMP is used in thermal power plants, circulating cooling water in oil refineries, and oilfield reinjection water systems. It can play a role in reducing corrosion and scaling of metal equipment or pipelines. It is used as a metal ion chelating agent in textile printing and dyeing industries, and also as a metal surface treatment agent. It has good chemical stab...

Claims

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Application Information

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IPC IPC(8): C07F9/38
CPCC07F9/3808
Inventor 刘帆杨乃飞田之光高磐龙梁蓉
Owner 南通联膦化工有限公司
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