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A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate

A technology of hydroxyethylene diphosphonic acid and ethyl acetate, applied in the field of hydroxyethylene diphosphonic acid production technology, can solve many problems such as dilute acetic acid, reduce waste water volume, improve economic benefits, and improve reaction rate Effect

Active Publication Date: 2019-07-16
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

[0005] The purpose of the present invention is to address the deficiencies of the prior art, and now provides a method to solve the problem of more dilute acetic acid produced by hydrolysis of deionized water in the traditional process, which improves the utilization efficiency of acetic acid, greatly reduces the production cost, and turns waste into treasure. Developed a resource-saving production process for the co-production of ethyl acetate from hydroxyethylidene diphosphonic acid

Method used

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  • A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate
  • A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate
  • A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate

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Embodiment 1

[0028] A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate, with phosphorus trichloride, glacial acetic acid, deionized water and ethanol as raw material, according to the following specific steps, complete the production process; specific steps are as follows:

[0029] (1) Thoroughly clean the reactor, check the valve and pressure;

[0030] (2) 800 parts by weight of glacial acetic acid and 100 parts by weight of deionized water are drawn into the bottom of the reactor, and the stirring is started;

[0031] (3) Slowly add 600 parts by weight of phosphorus trichloride dropwise, the temperature is controlled at 0°C during the dropwise addition, and after the dropwise addition is completed, stir for 2 hours at a temperature of 20°C;

[0032] (4) Continue to heat up to 80°C, and keep warm for 1 hour;

[0033] (5) After the reaction, cool down to 20°C, start to drop 160 parts by weight of ethanol, after the dropwise addition, heat up t...

Embodiment 2

[0044] A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate, with phosphorus trichloride, glacial acetic acid, deionized water and ethanol as raw material, according to the following specific steps, complete the production process; specific steps are as follows:

[0045] (1) Thoroughly clean the reactor, check the valve and pressure;

[0046] (2) 1600 parts by weight of glacial acetic acid and 350 parts by weight of deionized water are pumped into the bottom of the reaction kettle, and the stirring is started;

[0047] (3) Slowly add 2000 parts by weight of phosphorus trichloride dropwise, the temperature is controlled at 60°C during the dropwise addition, and after the dropwise addition is completed, stir at a temperature of 90°C for 8 hours;

[0048] (4) Continue to heat up to 150°C, and keep warm for 5 hours;

[0049] (5) After the reaction is over, cool down to 120°C, start to drop 320 parts by weight of ethanol, after the dropw...

Embodiment 3

[0054] A kind of production technology of hydroxyethylene diphosphonic acid co-production ethyl acetate, with phosphorus trichloride, glacial acetic acid, deionized water and ethanol as raw material, according to the following specific steps, complete the production process; specific steps are as follows:

[0055] (1) Thoroughly clean the reactor, check the valve and pressure;

[0056] (2) 1200 parts by weight of glacial acetic acid and 225 parts by weight of deionized water are drawn into the bottom of the reactor, and the stirring is started;

[0057] (3) Slowly add 1300 parts by weight of phosphorus trichloride dropwise, the temperature is controlled at 30°C during the dropwise addition, and after the dropwise addition is completed, stir for 5 hours at a temperature of 55°C;

[0058] (4) Continue to heat up to 110°C, and keep warm for 3 hours;

[0059] (5) After the reaction, the temperature was lowered to 70°C, and 240 parts by weight of ethanol was added dropwise. After ...

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Abstract

The invention discloses a manufacturing technique for 1-Hydroxyethylidene-1,1-diphosphonic acid co-producing ethyl acetate, comprising phosphorus trichloride, glacial acetic acid, deionized water and ethyl alcohol as ingredients. According to the following specific steps, the manufacturing technique is finished. The manufacturing technique adopts ethyl alcohol to replace deionized water as an esterlysis agent. After esters are decomposed to HEDP by an alcoholysis reaction, much acetic acid is produced further. Being stimulated by strong organic acid HEDP, ethyl alcohol and acetic acid further quickly generate ethyl acetate. The two reactions are underway simultaneously and promote each other. Not only the reaction rate is improved, but also waste is turned into wealth, the economic benefit is raised, and the wastewater quantity is reduced. All indexes of the prepared HEDP co-producing ethyl acetate product accord with the indexes of industrial products.

Description

technical field [0001] The invention relates to a production process of hydroxyethylene diphosphonic acid, in particular to a production process of co-producing ethyl acetate from hydroxyethylene diphosphonic acid. Background technique [0002] Ethyl acetate is one of the most common and widely used aliphatic esters. It is an important class of organic solvents and organic chemical raw materials. It is widely used in organic synthesis, coatings, medicine, spices and other industries. With the sustained and stable growth of the world economy and increasingly stringent environmental protection requirements, benzene solvents are expensive and highly toxic, and it has become a general trend to use high-grade solvents to produce coatings, inks, adhesives and other products, thus prompting the rapid growth of the demand for ethyl acetate. Ethyl acetate has excellent solubility, quick-drying property, and is widely used. It is a very important organic chemical raw material and an e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/38C07C67/03C07C69/14
CPCC07C67/03C07F9/3808C07C69/14
Inventor 田之光高磐龙施海霞
Owner 南通联膦化工有限公司