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Production method of water-soluble ammonium polyphosphate liquid

A water-soluble polymer production method technology, applied in the field of phosphorus chemical industry, can solve the problems of complex production operation process, complex production process and equipment, and large investment, and achieve low water-insoluble content, low production cost, and small equipment investment. Effect

Inactive Publication Date: 2018-04-10
SHIFANG CHANGFENG CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a production method of water-soluble ammonium polyphosphate liquid to solve the technical problems of conventional water-soluble ammonium polyphosphate liquid production process and complex equipment, large investment, complicated production operation process, etc.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of production method of water-soluble ammonium polyphosphate liquid, this method is to be that the industrial phosphoric acid of content is 72-76% (calculated as phosphorus pentoxide), liquid ammonia / gas ammonia as raw material, through tubular neutralization polycondensation reaction and The polymerization kettle further neutralizes the polycondensation reaction to produce high-temperature molten materials, and then cools and prepares ammonium polyphosphate liquid in a water-soluble ammonium polyphosphate water preparation tank with a cooling jacket; specifically, it includes the following steps:

[0032] Step 1: Tubular neutralization and polycondensation reaction, liquid ammonia neutralization of phosphoric acid: pressurize phosphoric acid to 0.35mPa through a booster pump, and then pressurize liquid ammonia to 0.40mPa, and the two raw materials enter the tubular reactor at the same time for polymerization , the reaction temperature is 165°C, the reaction time ...

Embodiment 2

[0037] A kind of production method of water-soluble ammonium polyphosphate liquid, this method is to be that the industrial phosphoric acid of content is 72-76% (calculated as phosphorus pentoxide), liquid ammonia / gas ammonia as raw material, through tubular neutralization polycondensation reaction and The polymerization kettle further neutralizes the polycondensation reaction to produce high-temperature molten materials, and then cools and prepares ammonium polyphosphate liquid in a water-soluble ammonium polyphosphate water preparation tank with a cooling jacket; specifically, it includes the following steps:

[0038] Step 1: Tubular neutralization and polycondensation reaction, liquid ammonia neutralization of phosphoric acid: pressurize phosphoric acid to 0.6mPa through a booster pump, and then pressurize liquid ammonia to 0.6mPa, and the two raw materials enter the tubular reactor at the same time for polymerization , the reaction temperature is 150°C, the reaction time is...

Embodiment 3

[0043]A kind of production method of water-soluble ammonium polyphosphate liquid, this method is to be that the industrial phosphoric acid of content is 72-76% (calculated as phosphorus pentoxide), liquid ammonia / gas ammonia as raw material, through tubular neutralization polycondensation reaction and The polymerization kettle further neutralizes the polycondensation reaction to produce high-temperature molten materials, and then cools and prepares ammonium polyphosphate liquid in a water-soluble ammonium polyphosphate water preparation tank with a cooling jacket; specifically, it includes the following steps:

[0044] Step 1: Tubular neutralization and polycondensation reaction, liquid ammonia neutralization of phosphoric acid: pressurize phosphoric acid to 0.45mPa through a booster pump, and then pressurize liquid ammonia to 0.50mPa, and the two raw materials enter the tubular reactor at the same time for polymerization , the reaction temperature is 200°C, the reaction time i...

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Abstract

The invention discloses a production method of a water-soluble ammonium polyphosphate liquid. The method comprises the following steps: taking industrial phosphoric acid, liquid ammonia and gas ammonia as raw materials, preparing a high-temperature molten material through a tubular neutralization polycondensation reaction and a polymerization-kettle further neutralization condensation polymerization, and then carrying out cooling in a water-soluble ammonium polyphosphate water agent preparation tank with a cooling jacket for preparing the ammonium polyphosphate liquid. A water-soluble ammoniumpolyphosphate solid does not need to be prepared firstly, and the water-soluble ammonium polyphosphate water agent can be directly produced on a device. The production process is short, the equipmentinvestment is small, the production operation is simple and convenient, the product quality is good, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of phosphorus chemical industry, in particular to a production method of water-soluble ammonium polyphosphate liquid. Background technique [0002] Water-soluble ammonium polyphosphate is a polymer containing phosphorus and nitrogen, and its degree of polymerization is generally 2-20. It can be used as a fire-retardant and flame-retardant additive raw material for fabrics, wood, fibers and coatings in industry, and can also be used as a long-term slow-release fertilizer in agriculture and has achieved relatively ideal results. [0003] The conventional production methods for the industrial production of ammonium polyphosphate mainly include the condensation method of phosphoric acid and urea, the high temperature gas phase reaction method of phosphorus pentoxide-ammonia-water vapor, the ammonification method of polyphosphoric acid, the dehydration polymerization method of ammonium orthophosphate, etc. The co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/40C05B7/00
CPCC01B25/405C05B7/00
Inventor 杨劲松刘泽祥吴雨庭刘大才詹强
Owner SHIFANG CHANGFENG CHEM CO LTD
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