Method for preparing rubidium pentaborate

A technology of pentaboric acid and rubidium carbonate, applied in the directions of borates, boron oxy compounds, etc., can solve the problems of many by-products, low yield, long synthesis time, etc., and achieve the advantages of short synthesis time, high yield and shortened reaction time. Effect

Inactive Publication Date: 2013-06-26
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, at present, the solution method is used to prepare rubidium borate, and there are still problems such as long synthesis time, many by-products, and low yield.

Method used

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  • Method for preparing rubidium pentaborate
  • Method for preparing rubidium pentaborate
  • Method for preparing rubidium pentaborate

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preparation example Construction

[0027] The preparation method of rubidium pentaborate of the present invention comprises the steps:

[0028] a, rubidium carbonate is added in the boric acid solution of 20~30wt%, stirs, obtains reaction liquid; Wherein, the weight of rubidium carbonate is 7.5~11.5% of the water weight in the boric acid solution;

[0029] b. Filter the reaction solution obtained in step a, and dry the filter cake to obtain final product.

[0030] The reaction formula of boric acid and rubidium carbonate solution in the inventive method is as follows:

[0031] Rb 2 CO 3 +H 3 BO 3 +H 2 O→Rb[B 5 o 6 (OH) 4 ]·2H 2 O+CO 2 ↑+H 2 o

[0032] Among them, rubidium carbonate is very easy to absorb water. In order to increase the yield, as a preferred solution, it needs to be dried before using rubidium carbonate to remove water. As a more preferred solution, rubidium carbonate should be heated at 150-200 ° C before adding the boric acid solution. Dry to constant weight.

[0033] Further, on...

Embodiment 1

[0041] Embodiment 1 adopts the inventive method to prepare rubidium pentaborate

[0042] a. Add rubidium carbonate to a 20wt% boric acid solution at 70°C and stir to obtain a reaction solution; wherein, rubidium carbonate is dried at 150°C to constant weight before adding the boric acid solution, and the weight of rubidium carbonate is equal to that in the boric acid solution 7.5% of the water weight; the preparation method of the boric acid solution is: dry the boric acid at 70°C to constant weight, then add it into the water with a temperature of 70°C according to the proportion, dissolve it, and prepare it; the reaction temperature of rubidium carbonate and boric acid 70°C;

[0043] b. Filter the reaction solution obtained in step a, and dry the filter cake at 70°C to obtain the product.

[0044] It has been determined that the synthesis time of rubidium pentaborate in this embodiment is 19 hours in total, and the yield of rubidium pentaborate is 98.06%.

Embodiment 2

[0045] Embodiment 2 adopts the inventive method to prepare rubidium pentaborate

[0046] a. Add rubidium carbonate to a 20wt% boric acid solution at 75°C and stir to obtain a reaction solution; wherein, rubidium carbonate is dried at 180°C to constant weight before adding the boric acid solution, and the weight of rubidium carbonate is equal to that in the boric acid solution 7.5% of water weight; the preparation method of boric acid solution is: dry boric acid at 75°C to constant weight, then add it into water with a temperature of 75°C according to the proportion, dissolve it, and prepare it; the reaction temperature of rubidium carbonate and boric acid 75°C;

[0047] b. Filter the reaction solution obtained in step a, and dry the filter cake at 75°C to obtain the product.

[0048] It has been determined that the synthesis time of rubidium pentaborate in this embodiment is 18 hours in total, and the yield of rubidium pentaborate is 98.85%.

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Abstract

The invention relates to a method for preparing rubidium pentaborate, and belongs to the technical field of a rubidium compound. The method for preparing the rubidium pentaborate disclosed by the invention comprises the following steps of a, adding rubidium carbonate to 20-30wt% of boric acid solution to agitate, so as to obtain reaction liquid, wherein the weight of the rubidium carbonate is 7.5-11.5% of that of water in the boric acid solution; and b, filtering the reaction liquid obtained in step a, and drying a filter cake. The method disclosed by the invention has the advantages of being short in synthesis time, high in yield, fast and simple, environment-friendly, economic and the like.

Description

technical field [0001] The invention relates to a preparation method of rubidium pentaborate, belonging to the technical field of rubidium compounds. Background technique [0002] Boron and its compounds are an important product series in the inorganic salt industry. They are one of the important components of insulating materials, temperature-resistant materials, wear-resistant materials, flame-retardant materials, and structural materials. They are also agricultural trace element fertilizers. They have been widely used in chemical, Medicine, light industry, textile, metallurgy, building materials, national defense and military industry, cutting-edge science, agriculture and other departments. Borates have properties with practical application value such as nonlinear optics, flame retardancy, luminescence and piezoelectricity. Rubidium borate has different composition forms due to its different B-O coordination bonds: Rb 3 [B 3 o 4 (OH) 4 ]2H 2 O, Rb 2 [B 4 o 5 (OH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/12
Inventor 曾英于旭东刘玲利尹庆红
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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