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Method for preparing peroxide phosphoric acid

A technology of peroxyphosphoric acid and peroxypyrophosphoric acid, which is applied in the field of phosphorus chemical industry, can solve the problems of low hydrogen peroxide active oxygen yield and high heat transfer cost, achieve high economy and practicability, less active oxygen loss, and simple control conditions easy effect

Active Publication Date: 2009-06-03
YUNNAN JIANGLIN GROUP
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  • Claims
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Problems solved by technology

[0009] In order to solve the shortcomings of the above-mentioned production of peroxyphosphoric acid with phosphoric anhydride and hydrogen peroxide as raw materials, the hydrogen peroxide active oxygen yield is low and the heat transfer cost is high. The invention provides a method for preparing peroxyphosphoric acid, comprising the following steps:

Method used

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  • Method for preparing peroxide phosphoric acid
  • Method for preparing peroxide phosphoric acid
  • Method for preparing peroxide phosphoric acid

Examples

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Embodiment 1

[0044] Embodiment 1, add 5 kilograms of 90% peroxyphosphoric acid mother liquor in 10 liters of jacketed reactors, add phosphoric anhydride under the condition of feeding cooling water while stirring, add phosphoric anhydride speed to show that the temperature is not high At 35°C, add a total of 2.8 kg of phosphoric anhydride and continue to mix and dissolve for 10 minutes. After all the solids are dissolved, slowly add 61.3% hydrogen peroxide under the above-mentioned control conditions, keep the temperature of the feed liquid below 35°C, and add hydrogen peroxide together. 2.208 kg were then stirred and matured for two hours to obtain about 10 kg of product, and 5 kg of finished product peroxyphosphoric acid was taken out, and the remaining 5 kg continued to circulate as mother liquor.

Embodiment 2

[0045] Embodiment 2, add 5 kilograms of 80% peroxyphosphoric acid mother liquor in the reaction kettle of example 1, add phosphoric anhydride under the condition of cooling water cooling while stirring, add phosphoric anhydride speed to show that the temperature is not higher than 38 DEG C , add 2.52 kg of phosphoric anhydride in total, continue to mix and dissolve for 8 minutes, and after all of them are dissolved, slowly add 48.2% hydrogen peroxide under the above-mentioned control conditions, still keep the temperature of the feed liquid below 38°C, add 2.49 kg of hydrogen peroxide, and then stir and mature Two hours, about 10 kilograms of products were obtained, 5 kilograms of finished product peroxyphosphoric acid were taken out, and 5 kilograms of remaining mother liquor continued to circulate.

Embodiment 3

[0046] Embodiment 3, add 1.25 kilograms of 80% peroxyphosphoric acid mother liquors in the reactor of example 1, add phosphoric anhydride under the condition of passing cooling water while stirring, add phosphoric anhydride speed to show that the temperature is not higher than 38 ℃, the first After adding 0.63 kg of phosphoric anhydride at one time, continue to mix and dissolve for 8 minutes, then add 48.2% hydrogen peroxide under the above conditions, and keep the temperature of the feed liquid not higher than 38°C, add 0.623 kg of hydrogen peroxide, and then mix and mature for 20 minutes; then add Phosphoric anhydride, the control conditions are the same as the first time. After adding 1.25 kg of phosphoric anhydride for the second time, continue to mix and dissolve for 8 minutes, then add 48.2% hydrogen peroxide, and control the temperature below 38 ° C while still mixing. Add 1.24 kg of hydrogen peroxide for the second time , the feed liquid continued to ripen for 20 minute...

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Abstract

The invention discloses a method for preparing a peroxide phosphoric acid, belongs to the chemical technical field of phosphorus, and relates to an improved method for producing peroxide phosphoric acid (H3PO5). The method adopts phosphoric acid anhydride and hydrogen peroxide aqueous solution as raw materials and comprises the following steps: (1) resolving phosphoric acid anhydride in a peroxide phosphoric acid mother solution, and (2) adding a hydrogen peroxide aqueous solution for hydrolyzing the product to get peroxide phosphoric acid. Part of peroxide phosphoric acid is taken out as products, and the rest serves as mother solution to circulate in step 1. The method is easy to control, has low active oxygen loss and is easy to realize industrialized production.

Description

technical field [0001] The invention belongs to the technical field of phosphorus chemical industry and relates to a production method of peroxyphosphoric acid. Background technique [0002] Similar to peroxysulfuric acid and peroxynitric acid, peroxyphosphoric acid (H 3 PO 5 ) is an inorganic peroxyacid. According to "B.Elver, S.Hawkins, G.schulz, 'Peroxo compounds, Inorganic' in ullmann Encyclopedia of Industrial Chemistry, 19A, P177-197 (1991)" ("Inorganic Peroxides" "Ullmann Encyclopedia of Industrial Chemistry" ) description, peroxyphosphoric acid is a strong oxidizing agent. Unlike peroxysulfuric acid and peroxynitric acid, because phosphoric acid is a non-volatile acid, peroxyphosphoric acid has high stability, and it is involved in the application of peroxyphosphoric acid in many industries. Literature "Springer, E.l., 'Delignification of wood and kraft pulp with peroxymonophosphoric acid', J.pulp and pap.sci., Vol.23NO.12, P582-584 (1997)" ("Use peroxyphosphoric...

Claims

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Application Information

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IPC IPC(8): C01B15/16
Inventor 万荣惠后雪松王斌饶志臻马兴良
Owner YUNNAN JIANGLIN GROUP
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