Method for synthesis of disodium octaborate tetrahydrate by using one-step boric acid

A technology of disodium octaborate tetrahydrate and boric acid, applied in the directions of borates, boron compounds, boron oxide compounds, etc., can solve the problems of clogging liquid fertilizer spraying equipment and affecting the purity of disodium octaborate tetrahydrate, etc. The effect of remarkable performance, improved production level and simple process

Inactive Publication Date: 2015-04-01
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In my country, boric acid is usually obtained by treating boron ore with sulfuric acid (called one-step boric acid), and the product contains high Al 3+ , Pb 2+ , Fe 3+ These impurities affect the purity of disodium octabor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take 500g of one-step boric acid, 760g of borax decahydrate, 50g of activated carbon, 30g of hydrogen peroxide (mass concentration of 30%), and 450g of water, put them into a 2L reactor, then heat the reactor, and turn on the stirring at the same time to make the temperature of the reaction system reach 70 Keep the temperature constant. After 2h of reaction, the product is filtered. The filtrate is dried at 180℃ and powdered to obtain disodium octaborate tetrahydrate. The content of metal ion impurities such as iron and aluminum in the product is less than 10ppm.

Embodiment 2

[0017] Take 1000g of one-step boric acid, 210g of anhydrous sodium carbonate, 30g of activated carbon, 15g of ammonium carbonate, and 600g of water, put them in a 2L reactor, then heat the reactor while turning on the stirring to make the temperature of the reaction system reach 105℃ and maintain the temperature Constant, after reacting for 1h, the product is filtered. The filtrate is dried at 140°C and powdered to obtain disodium octaborate tetrahydrate. The content of metal ion impurities such as iron and aluminum in the product is less than 10ppm.

Embodiment 3

[0019] Take 1000g of one-step boric acid, 252g of sodium bicarbonate, 78g of sodium percarbonate, 20g of activated carbon, and 400g of water, put them in a 2L reactor, then heat the reactor while turning on the stirring to make the temperature of the reaction system reach 90℃ and maintain the temperature Constant, the product is filtered after 0.5h of reaction. The filtrate is evaporated and dried at 100°C and powdered to obtain disodium octaborate tetrahydrate. The content of metal ion impurities such as iron and aluminum in the product is less than 10ppm.

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Abstract

The invention belongs to the chemical industry technical field, and relates to a method for synthesis of disodium octaborate tetrahydrate by using a one-step boric acid. The method comprises the steps: placing one-step boric acid, a sodium-containing chemical product, water and an impurity removal agent in a reactor, stirring and heating to 60-120 DEG C, under a heat preservation condition, continuing stirring and heating for 0.5-2 h, filtering the obtained product, drying the filtrate at the temperature of 90-200 DEG C, preparing a powder, and thus obtaining disodium octaborate tetrahydrate having low impurity content. The method solves the problems that the product purity and the undissolved substance content difficultly meet agriculture, daily chemical industry and other industrial requirements in the production of disodium octaborate tetrahydrate with the one-step boric acid as a raw material due to high metal ion impurity content. The whole preparation process has the advantages of simple reaction process and easy control, and shows obvious competitive advantages and profit space.

Description

Technical field [0001] The invention belongs to the technical field of chemical engineering, and relates to a method for synthesizing disodium octaborate tetrahydrate by using boric acid in one step. technical background [0002] Disodium octaborate tetrahydrate is an important borate product, which is widely used in agriculture, daily chemical industry, cultural relic protection, medicine and health and other industries. In agriculture, disodium octaborate tetrahydrate has a significant yield-increasing effect on cotton, rapeseed, wheat and other crops. When applied to fruit trees, it can increase the sugar content of fruits. It is comparable to other boron fertilizers such as boric acid, borax and boron-magnesium fertilizers. In comparison, it has the advantages of high boron content, high solubility, and neutral solution; in the field of daily chemical industry, wood treated with disodium octaborate tetrahydrate can be antiseptic and antibacterial, and it is flame retardant. I...

Claims

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Application Information

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IPC IPC(8): C01B35/12
CPCC01B35/121C01P2006/80
Inventor 田朋宁桂玲田俊英林源庞洪昌叶俊伟贡卫涛
Owner DALIAN UNIV OF TECH
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