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A kind of production method of water treatment agent aminotrimethylidene phosphonic acid

An aminotrimethylidene phosphonic acid and a production method technology, applied in the chemical industry, can solve the problems of low primary reaction rate, many by-products, unfavorable industrial scale development, etc., and achieve the advantages of shortening production cycle, continuous production, saving man-hours and costs. Effect

Active Publication Date: 2021-10-12
SHANDONG TAIHE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is continuous, it is not conducive to its industrial scale development due to the low primary reaction rate, time-consuming and energy-consuming separation of unreacted raw materials, and many by-products.

Method used

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  • A kind of production method of water treatment agent aminotrimethylidene phosphonic acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 200kg of ATMP base material to the first to third-stage reactors respectively, start stirring, and after the temperature rises to 100°C, pour ammonia water 517L / h, hydrochloric acid 1041L / h, and phosphorous acid 2673L / h at a uniform speed into the first-stage reactor. Ammonia, hydrochloric acid and phosphorous acid are injected into the three-stage reactor at a constant speed of 1768L / h of formaldehyde, and the amount ratio of ammonia, hydrochloric acid, phosphorous acid and formaldehyde is n 氨水 :n 盐酸 :n 亚磷酸 :n 甲醛 1:1.2:3.0:3.1. The time from the beginning of adding the materials in the reactor to the beginning of overflowing is 70min. After feeding for 20 minutes, the temperature in the reactor was controlled at 118±2°C, and the mass fractions of ammonia water, hydrochloric acid, phosphorous acid, and formaldehyde were 25%, 32%, 70%, and 40%, respectively.

[0028] After the reaction kettle begins to overflow, continue to inject the raw materials at a uniform s...

Embodiment 2

[0036] Add 200kg of ATMP base material to the first to third-stage reactors respectively, start stirring, and after the temperature rises to 100°C, pour ammonia water 517L / h, hydrochloric acid 1041L / h, and phosphorous acid 2673L / h at a uniform speed into the first-stage reactor. Ammonia, hydrochloric acid and phosphorous acid are injected into the three-stage reactor at a constant speed of 1768L / h of formaldehyde, and the amount ratio of ammonia, hydrochloric acid, phosphorous acid and formaldehyde is n 氨水 :n 盐酸 :n 亚磷酸 :n 甲醛 1:1.2:3.0:3.1. The time from the beginning of adding the materials in the reactor to the beginning of overflow is about 70 minutes. After feeding for 20 minutes, the temperature in the reactor was controlled at 112±2°C, and the mass fractions of ammonia water, hydrochloric acid, phosphorous acid, and formaldehyde were 25%, 32%, 70%, and 40%, respectively.

[0037] After the reaction kettle begins to overflow, continue to inject the raw materials at a u...

Embodiment 3

[0045] Add 200kg of ATMP base material to the first to third-stage reactors respectively, start stirring, and after the temperature rises to 100°C, pour ammonia water 724L / h, hydrochloric acid 1457L / h, and phosphorous acid 3742L / h at a uniform speed into the first-stage reactor. Ammonia, hydrochloric acid and phosphorous acid are injected into the three-stage reactor at a constant speed of 2475L / h of formaldehyde, and the amount ratio of ammonia, hydrochloric acid, phosphorous acid and formaldehyde is n 氨水 :n 盐酸 :n 亚磷酸 :n 甲醛 1:1.2:3.0:3.1. The time from the beginning of adding the materials in the reactor to the beginning of overflow is about 50 minutes. After feeding for 20 minutes, the temperature in the reactor was controlled at 118±2°C, and the mass fractions of ammonia water, hydrochloric acid, phosphorous acid, and formaldehyde were 25%, 32%, 70%, and 40%, respectively.

[0046] After the reaction kettle begins to overflow, continue to inject the raw materials at a u...

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Abstract

The invention discloses a production method of aminotrimethylene phosphonic acid, a water treatment agent. Specifically, ammonia water, phosphorous acid, hydrochloric acid, and formaldehyde are put into a reaction kettle at a constant speed in a certain proportion, and are subjected to gradient overflow, heat preservation, flushing, dilution, etc. process to obtain high-purity ATMP aqueous solution. This method achieves continuous production through the simple operation mode of continuous feeding of liquid raw materials and continuous discharge, which greatly shortens the production cycle. By controlling the reaction conditions, this method achieves a primary conversion rate of ATMP ≥ 98%, without the need to separate raw materials, saving man-hours and costs. The hydrochloric acid used in this method is a catalyst, which can be reused after treatment, without the generation of three wastes, and is environmentally friendly.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a method for producing water treatment agent aminotrimethylene phosphonic acid. Background technique [0002] Aminotrimethylene phosphonic acid (ATMP) is widely used as a water treatment agent in industrial circulating cooling water systems. It has good scale and corrosion inhibition effects, and has a good effect on inhibiting calcium carbonate, hydrated iron oxide and calcium phosphate. It has synergistic drug effect when used in conjunction with other corrosion inhibitors and scale inhibitors. The dosage is 1-20mg / L It is an important scale inhibitor and dispersant, and it is widely used in the cooling water treatment of large-scale petrochemical, chemical fertilizer and other production equipment. ATMP has good chemical stability, and it is not easy to be destroyed by acid and alkali, and it is not easy to be hydrolyzed. From the structural point of view, ATMP has three pho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/38
CPCC07F9/38
Inventor 程终发刘全华周响宋盟盟王宁宁陈成效
Owner SHANDONG TAIHE WATER TREATMENT TECH CO LTD