Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of barium hydroxide

A barium hydroxide and manganese monoxide technology, applied in the direction of calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of long reaction time at high temperature, high cost, high energy consumption, etc., and achieve low cost and simple method , producing a clean effect

Inactive Publication Date: 2007-05-16
李守德
View PDF1 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Disadvantages of this method: high production cost, only 70% raw material utilization rate, low resource utilization rate, difficult recovery of barium chloride, barium hydroxide, sodium chloride and sodium hydroxide contained in crystallization mother liquor
[0011] ①. The production cost is high, and the raw materials require good quality of witherite, but at present, high-quality witherite mineral resources are becoming increasingly exhausted, and the utilization rate of process raw materials is only 50%, and the utilization rate of resources is low;
[0012] ②. The high temperature reaction takes a long time and consumes a lot of energy. The high temperature reaction at 1400°C takes dozens of hours to complete
[0013] ③. The use cycle of the clip bowl containing the reaction materials is only 2 to 3 times, and the cost is high
[0015] (1), in actual production, the barium hydroxide described in its step (1) can't reach relevant national quality standard, promptly can't make qualified product
Its reason is: the obtained barium hydroxide contains the eutectic mixture of barium hydroxide and barium sulfide, all can't remove barium sulfide by washing, the method for recrystallization, thus the sulfur content is too high in the barium hydroxide product made
[0016] (2) Due to the above deficiencies, a large amount of raw materials are wasted in the production process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] The present invention will be further described below in conjunction with embodiment:

[0042] The present invention uses manganese dioxide and air as an oxidant to circulate and oxidize barium sulfide to prepare barium hydroxide, which comprises the following steps:

[0043] (1) Use coal to reduce barite at 800°C to 1300°C to generate barium sulfide;

[0044] (2), use slag washing water to leach barium sulfide at 60°C-95°C, leaching and filtering to obtain barium sulfide mother liquor, adjust the temperature of barium sulfide mother liquor to 30°C-70°C, and the concentration is 50g / L-150g / L ; The filter residue is washed with hot water, and the obtained washing water is recycled for leaching barium sulfide;

[0045] (3), oxidize the prepared barium sulfide mother liquor with manganese dioxide to generate barium hydroxide, sulfur, manganese monoxide, filter and separate, the filtrate is the barium hydroxide mother liquor, and the filter residue is a solid mixture of su...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a preparing method of barium hydroxide, which comprises the following steps: (1) reducing barite into barium sulphide through coal; (2) immersing barium sulphide through washing water to obtain mother liquid of barium sulphide; adjusting the temperature of mother liquid of barium sulphide to 30-70 Deg C and density at 50-150g / L; washing filter slag through water; immersing barium sulphide through washing water; (3) oxidizing barium sulphide to produce barium hydroxide, sulfur and manganese monoxide through manganese dioxide; filtering to obtain barium hydroxide mother liquid; obtaining the filter slag with sulfur and manganese monoxide; (4) condensing barium hydroxide; crystallizing; centrifuging; separating to obtain barium hydroxide octahydrate; (5) separating filter slag in the step (3); recycling sulfur; oxidizing manganese monoxide into manganese dioxide through air to circulate in the step (3).

Description

(1) Technical field [0001] The invention relates to a preparation method of a barium compound, in particular to a preparation method of barium hydroxide. (two), background technology [0002] Barium hydroxide is a basic chemical raw material, used to manufacture barium salts, organic barium compounds, barium-based grease, and also used for refining animal and vegetable oils, sucrose, and sugar beets. Also used in plastic stabilizers, paper additives, sealing components, rubber vulcanization catalysts, antirust paper components, paint dispersants, polyurethane foam fire extinguishing agents, silk and rayon treatment agents, boiler hard water softeners and neutralizers, glass The enamel industry is used as a raw material for the production of glass and enamel. With the development of new uses for barium hydroxide, the market demand for barium hydroxide is increasing year by year. [0003] There are two traditional barium hydroxide industrial production processes: [0004] (1...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/10
Inventor 李守德
Owner 李守德
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products