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Preparation of 2ZnO.3B2O3.3.5H2O zinc borate

A 2zno·3b2o3·3.5h2o, 2zno·3b2o3·7h2o technology, applied in the direction of borates, boron oxide compounds, etc., can solve problems such as boron loss and water discharge, and achieve low production cost, simple process, no side effects product effect

Inactive Publication Date: 2010-07-28
常熟紫金知识产权服务有限公司
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AI Technical Summary

Problems solved by technology

This method needs to add excessive boric acid in the proportioning, and it also needs filtration and water washing process like method 1. Although the mother liquor can be reused, there are still problems of boron loss and water discharge.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0008] Example 1: Weigh 8.2 grams of 2ZnO·3B respectively 2 o 3 ·7H 2 O Zinc borate and 8.0 grams of boric acid, add 35 grams of water, mix and stir, and react at 95°C for 5 hours. After the reaction, filter while it is hot, and recycle the filtrate, wash the filter cake with hot water, and then directly store the filter cake at 110°C Dry to get the desired 2ZnO·3B 2 o 3 3.5H 2 O zinc borate products.

example 2

[0009] Example 2: Take 45 grams of water and 8.2 grams of 2ZnO 3B respectively 2 o 3 ·7H 2 O zinc borate and 10 grams of boric acid were mixed and stirred, reacted at 70°C for 7.5 hours, filtered while hot, the filtrate was recovered and recycled, the filter cake was washed with hot water, and then the filter cake was directly dried at 100°C to obtain the required 2ZnO. 3B 2 o 3 3.5H 2 O zinc borate products.

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PUM

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Abstract

The invention discloses a method for producing 2ZnO 3B2O3 3.5H2O (zinc borate), which is to make the 237 zinc borate react under a constant temperature in the water solution of boric acid for a certain period; then filter and wash directly upon the completion of the reaction, recover the washing liquid and the filtrate can be recovered for repetitive use; finally dry the filter cake to obtain the2ZnO 3B2O3 3.5H2O (zinc borate). The method of the invention has simple technique, the production process does not discharge wastewater and the production cost is low. The product can be used for flame-retardant material or daily chemical field, biological medicine field and so on.

Description

technical field [0001] The present invention relates to 2ZnO·3B 2 o 3 3.5H 2 A preparation method of zinc O borate belongs to the technical field of inorganic materials. Background technique [0002] According to literature reports, the existing methods for preparing zinc borate mainly contain the following: 1, taking borax and zinc sulfate as raw materials, heating and stirring in aqueous solution to synthesize zinc borate. Because there are two kinds of by-products in the reaction process of this method, the separation process is complicated [USP 3,649,172]; 2. Zinc borate is synthesized with zinc hydroxide and boric acid as raw materials. This method requires on-site preparation of zinc hydroxide [GB 1,348,900]; 3. Using zinc oxide and boric acid as raw materials, heating and stirring in aqueous solution to synthesize zinc borate [Zou Xuhua. Synthesis of a new flame retardant zinc borate (2335)[J]. Applied Chemical Industry, 2001, 30(2): 32~33]. This method needs to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B35/12
Inventor 袁良杰刘巧云肖勇陈硕平
Owner 常熟紫金知识产权服务有限公司
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