CN100532259C - Technology for preparing boric acid, magnesium carbonate and sodium sulphate by combined method - Google Patents
Technology for preparing boric acid, magnesium carbonate and sodium sulphate by combined method Download PDFInfo
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- CN100532259C CN100532259C CNB2006101273374A CN200610127337A CN100532259C CN 100532259 C CN100532259 C CN 100532259C CN B2006101273374 A CNB2006101273374 A CN B2006101273374A CN 200610127337 A CN200610127337 A CN 200610127337A CN 100532259 C CN100532259 C CN 100532259C
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- filtrate
- boric acid
- reaction
- magnesiumcarbonate
- washing
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Abstract
The process of co-producing boric acid, magnesium carbonate and sodium sulfate includes the first reaction step of reacting ascharite with 85 % concentration sulfuric acid to obtain wet boric acid and filtering to obtain filtrate; and the second reaction step of reacting the filtrate and sodium carbonate solution inside a reaction pond, filtering to obtain magnesium carbonate, concentrating the filtrate in a directly burning evaporator and hot filtering to obtain anhydrous sodium sulfate.
Description
Technical field:
The present invention relates to a kind of boron rock processing technique field.
Background technology
Present domestic boron magnesium ore deposit produces the method for boric acid, mainly is to adopt sulfuric acid to decompose boron magnesium ore deposit, produce boric acid after, mother liquor mesoboric acid and sal epsom are reached common saturation point.Mother liquor is handled dual mode, and the one, discharging, serious environment pollution; The 2nd, reclaim(ed) sulfuric acid magnesium, but sal epsom has boric acid, and quality product does not reach product standard, and benefit is relatively poor.This technology is sought the working method in a kind of boron magnesium ore deposit, and the handling problem that can solve mother liquor in the technology can make in the boron magnesium ore deposit effective constituent obtain comprehensive utilization again.The finished product of the present invention obtain boric acid, magnesiumcarbonate and sodium sulfate.Boric acid is used for glass industry, enamel and ceramic industry, alkali free glass fibre industry, metallurgical industry, electrician's industry, plating, electrolytic industry, pharmaceutical industry, rubber industry, wood preservation, soapmaking industry, leather industry, photograph, fire-resistant fabric, hard mass, dyestuff, spices manufacturing, organic synthesis, electrical equipment manufacturing, agricultural etc., and be used for the raw material that various boron compounds are produced.Magnesiumcarbonate is mainly used in rubber industry, dyestuffs industries, plastics industry, electronic industry, refractory materials etc., and the raw materials for production that are used for various magnesium compounds and magnesium.Anhydrous sodium sulphate is mainly used in the raw material of industry such as polyvinyl, dyestuff, synthetic detergent, glass, papermaking, inorganic salt.
Summary of the invention
The integrated process preparing boric acid that arrives involved in the present invention in two steps, the first step: behind magnesium borate ore and the sulfuric acid reaction, separate boric acid; The reaction of second step: mother liquor adds yellow soda ash continuation reaction behind the separation boric acid, produces hydrocarbonate of magnesia, and mother liquor is after evaporating separating anhydrous sodium sulfate behind the filtration hydrocarbonate of magnesia, and filtrate is reused.
The first step reaction:
The reaction of second step:
Flow process is: the first step reaction: magnesium borate ore (fine powder) adds in the reaction tank in proportion with 85% sulfuric acid, and wherein magnesium borate ore is that 1-3:0.5-2 adds entry with 85% vitriolic weight ratio, at 80-115 ℃ time continuous stirring reaction.Filtered while hot when reacting completely, filtrate enter in the cooling crystallizer, under agitation crystallisation by cooling.With separating centrifuge separate wet boric acid, through washing, drying is finished product.Filtrate enters in the second step reaction tank.The reaction of second step: add in the filtrate of getting after the first step reaction process and dissolved good sodium carbonate solution, wherein the weight ratio of magnesium borate ore and yellow soda ash is 1-3:0.5-1, and controlled temperature reacts under constantly stirring at 40-70 ℃.The after-filtration that reacts completely, magnesiumcarbonate, be finished product through washing, drying.Filtrate enters direct-fired vaporizer and concentrates, and filtered while hot gets the anhydrous sodium sulphate product, is finished product through washing, drying.Filtrate is gone the first step reaction process batching.
This technology is produced boric acid technology relatively with traditional single stage method, has following advantage:
1, break through the traditional technology yield low problem, improved the yield of product, saved Mineral resources;
2, under normal temperature, normal pressure, carry out, help investment, produce, manage, reduced running cost;
3, the direct combustion gas evaporation technique of this process using has improved vaporization efficiency, has saved the energy;
4, this technology does not have waste gas, discharge of wastewater, helps environmental requirement;
5, containing boron fertilizer in the waste residue, can be compound manure with the phosphate fertilizer hybrid process;
6, the work range to magnesium borate ore enlarges, and can satisfy the processing of the higher mineral products of Mg content;
7, the combustion gas source can adapt to the wider range fuel requirement for the independent development producer gas generator.
Embodiment:
The first step reaction: 2.00 tons fine powder magnesium borate ore adds in the reaction tank with 0.75 ton 85% sulfuric acid, adds entry, at 95 ℃ times continuous stirring reactions.Filtered while hot when reacting completely, filtrate enter in the cooling crystallizer, under agitation crystallisation by cooling.With separating centrifuge separate wet boric acid, through washing, drying is finished product.Filtrate enters in the second step reaction tank.The reaction of second step: add in the filtrate of getting after the first step reaction process and dissolved good sodium carbonate solution, the amount of the yellow soda ash that is added is 0.83 ton, and controlled temperature reacts under constantly stirring about 55 ℃.The after-filtration that reacts completely, magnesiumcarbonate, be finished product through washing, drying.Filter filtrate behind the magnesiumcarbonate and enter direct-fired vaporizer and concentrate, and filtered while hot getting the anhydrous sodium sulphate product, is finished product through washing, drying.Filtrate is gone the first step reaction process batching.Resulting product satisfies following specification: product specification boric acid: GB538-82, hydration magnesium basic carbonate: HG/T2959-2000 anhydrous sodium sulphate: HGl-520-80
Claims (1)
1. method of producing boric acid, magnesiumcarbonate and sodium sulfate, it is characterized in that: in the first step reaction, the sulfuric acid of fine powder magnesium borate ore and 85% is added in the reaction tank by weight the ratio that is 1-3: 0.5-2, add entry, continuous stirring reaction under 80-115 ℃, filtered while hot when reacting completely, filtrate enters in the cooling crystallizer, crystallisation by cooling under agitation, with separating centrifuge separate wet boric acid, be finished product through washing, drying; Filtrate after the centrifugation enters in the second step reaction tank, in the reaction of second step, add in the filtrate of getting after the first step reaction process and dissolved good sodium carbonate solution, controlled temperature is at 40-70 ℃, under constantly stirring, react, after-filtration reacts completely, get magnesiumcarbonate, through washing, drying is finished product, the filtrate that obtains behind the filtration magnesiumcarbonate enters direct-fired vaporizer and concentrates, and filtered while hot gets the anhydrous sodium sulphate product, is finished product through washing, drying, and wherein the weight ratio of magnesium borate ore and yellow soda ash is 1-3: 0.5-1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101273374A CN100532259C (en) | 2006-09-14 | 2006-09-14 | Technology for preparing boric acid, magnesium carbonate and sodium sulphate by combined method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101273374A CN100532259C (en) | 2006-09-14 | 2006-09-14 | Technology for preparing boric acid, magnesium carbonate and sodium sulphate by combined method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1911801A CN1911801A (en) | 2007-02-14 |
| CN100532259C true CN100532259C (en) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101273374A Expired - Fee Related CN100532259C (en) | 2006-09-14 | 2006-09-14 | Technology for preparing boric acid, magnesium carbonate and sodium sulphate by combined method |
Country Status (1)
| Country | Link |
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| CN (1) | CN100532259C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009078690A1 (en) * | 2007-12-14 | 2009-06-25 | Servicios Industriales Peñoles S.A. de C.V. | Method for the production of sodium sulphate and magnesium hydroxide |
| CN108101078B (en) * | 2018-01-31 | 2023-07-25 | 四川思达能环保科技有限公司 | Process system and method for producing magnesium sulfate heptahydrate by using boron-magnesium mud |
-
2006
- 2006-09-14 CN CNB2006101273374A patent/CN100532259C/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 从硼泥中制取轻质氧化镁的工艺研究. 范建萍.陕西化工，第28卷第2期. 1999 |
| 从硼泥中制取轻质氧化镁的工艺研究. 范建萍.陕西化工，第28卷第2期. 1999 * |
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| Publication number | Publication date |
|---|---|
| CN1911801A (en) | 2007-02-14 |
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Granted publication date: 20090826 Termination date: 20100914 |