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Preparation method of barium pyrophosphate based on barium hydrogen phosphate

A technology of barium hydrogen phosphate and barium pyrophosphate, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of no steps and lack of detailed instructions for preparation methods, and achieve the effect of improving economic efficiency

Pending Publication Date: 2022-06-10
贵州胜威凯洋化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the preparation of barium pyrophosphate, and the preparation methods that can be found lack detailed instructions. There are only general ideas and no specific steps.

Method used

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  • Preparation method of barium pyrophosphate based on barium hydrogen phosphate
  • Preparation method of barium pyrophosphate based on barium hydrogen phosphate
  • Preparation method of barium pyrophosphate based on barium hydrogen phosphate

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Effect test

Embodiment 1

[0021] Embodiment 1 of the present invention: a kind of preparation method of barium pyrophosphate based on barium hydrogen phosphate, comprises the following steps:

[0022] S100: Weigh 16.99g of barium carbonate, put it in a 250ml beaker, add 9.93g of 85% phosphoric acid diluted to 100ml, add while stirring, then heat and stir with a magnetic stirrer for 45min, wash 3 to 4 times after precipitation, Dry at 150°C in an oven to obtain solid barium hydrogen phosphate.

[0023] S200 : calcining the prepared barium hydrogen phosphate at 700° C. or higher for more than 20 minutes in a muffle furnace to obtain barium pyrophosphate. The barium pyrophosphate prepared by the above example has a purity of 99.1%.

Embodiment 2

[0024] Embodiment 2: a kind of preparation method of barium pyrophosphate based on barium hydrogen phosphate, comprises the following steps:

[0025] S100: Weigh 27.16g Ba(OH) 2 ·8H 2 O, 9.93g of 85% phosphoric acid, placed in a 250ml beaker, added 9.93g of 85% phosphoric acid diluted to 100ml, added while stirring, then heated and stirred with a magnetic stirrer for 45min, precipitated out, and washed the precipitate for 4-5 second, drying at 150°C in an oven to obtain solid barium hydrogen phosphate.

[0026] S200 : calcining the prepared barium hydrogen phosphate at 700° C. or higher for more than 20 minutes in a muffle furnace to obtain barium pyrophosphate. The barium pyrophosphate prepared by the above example has a purity of 99.7%.

Embodiment 3

[0027] Embodiment 3: a kind of preparation method of barium pyrophosphate based on barium hydrogen phosphate, comprises the following steps:

[0028] S100: Weighing BaCl 2H 2 O 104.69g, configured as 1L solution; weigh NaH 2 PO 4 ·2H 2 O 133.73g, configured into a 1L solution; take 50ml of each of the two solutions, mix the two solutions, add them while stirring, then heat and stir with a magnetic stirrer for 45min, and wash the precipitate for 3 to 4 times after the precipitate is precipitated, and place it in an oven. Dry at 150°C to obtain solid barium hydrogen phosphate.

[0029] S200: calcining the prepared barium hydrogen phosphate at 700° C. or higher for more than 20 minutes in a muffle furnace to obtain barium pyrophosphate. The barium pyrophosphate prepared by the above example has a purity of 99.4%.

[0030] Figure 1 to Figure 5 The order is the XRD pattern of barium pyrophosphate; the XRD pattern of calcined barium hydrogen phosphate at different temperature...

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Abstract

The invention discloses a preparation method of barium pyrophosphate based on barium hydrogen phosphate. The preparation method comprises the following steps: S100, preparing solid barium hydrogen phosphate; and S200, calcining the prepared barium hydrogen phosphate in a muffle furnace at the temperature of 700 DEG C or above for 20 minutes or above to obtain barium pyrophosphate. According to the method, phosphoric acid is taken as a phosphorus source, barium salt and barium alkali are taken as barium sources, and a two-step reaction is carried out, namely, barium hydrogen phosphate is firstly generated, and then high-temperature dehydration is carried out to further generate barium pyrophosphate. The application value of barite is not high, but if the barite is deeply processed to prepare fine chemical products, especially barium and phosphorus resources are combined to prepare barium phosphate salt products, the advantages of local resources are developed, and the economic efficiency is improved.

Description

technical field [0001] The invention relates to a preparation method of barium pyrophosphate based on barium hydrogen phosphate, and belongs to the technical field of chemical industry. Background technique [0002] my country is rich in barite resources and phosphate rock resources, among which the reserves of phosphate rock resources rank second in the world, and the phosphate rock resources in Guizhou Province ranks second in the country. Phosphate rock is the raw material of all man-made phosphorus-containing products, including yellow phosphorus, phosphoric acid, phosphate, phosphate fertilizer, phosphide, organic phosphorus, etc. It plays an important role in the national economy and is a non-renewable resource with huge strategic value. Guizhou Province is also rich in barite resources, accounting for one-third of the country's total reserves. Because of its high density, insoluble in water and acid, non-toxic, non-magnetic, easy to absorb radiation, good in filling, ...

Claims

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Application Information

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IPC IPC(8): C01B25/42
CPCC01B25/42C01P2002/72C01P2006/80
Inventor 马磊李海艳周骏宏周立国梁馨亓韩维玲郭正仙王照清武玉蓉王祥碧
Owner 贵州胜威凯洋化工有限公司
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