CN105084419A - One-off manufacturing technology of chromium compounds and new products in many industries by liquid phase method of ferrochromium - Google Patents

One-off manufacturing technology of chromium compounds and new products in many industries by liquid phase method of ferrochromium Download PDF

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CN105084419A
CN105084419A CN201410208208.2A CN201410208208A CN105084419A CN 105084419 A CN105084419 A CN 105084419A CN 201410208208 A CN201410208208 A CN 201410208208A CN 105084419 A CN105084419 A CN 105084419A
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唐翔
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Abstract

The invention relates to a one-off manufacturing technology of chromium compounds and new products in many industries by a liquid phase method of ferrochromium and belongs to the technical field of new chemical materials with metallurgical products used as raw materials to manufacture chromium compounds, iron series pigments, new silicon materials, new photovoltaic materials and new energy. The technology provided by the invention is advanced, energy-saving and environmentally friendly, and there is no discharge of waste residues, exhaust gas or wastewater. High temperature and high pressure are not required. Ferrochromium is used as a raw material to produce products such as chromium compounds, pigments, new energy, new silicon carbon battery materials and the like by a liquid phase method at a time, thus forming a series of new high-end industrial chains and thoroughly changing situations of single application and pure production of ferrochromium in the prior art. The backward production technology that original chromate compound roasting production generates high pollution which is greatly harmful to the environment is changed. Production of chromate compounds has embarked on an energy-saving and high-efficiency development road. Diversified development and application fields of the ferrochromium industry are greatly expanded, international competitiveness of enterprises is greatly enhanced and national industrial upgrading and optimization and development are promoted. The technology provided by the invention is of great significance. The technology accords with requirements of modern green economic development and has great enterprises economic benefits, perfection benefits and social benefits.

Description

Ferrochrome liquid phase method disposable manufacture chromium cpd conglomerate product innovation technique
Technical field
The present invention relates to a kind of ferrochrome liquid phase method disposable manufacture chromium cpd conglomerate product innovation technique, belonging to metallurgic product is the new chemical materials technical field that raw material manufactures chromium cpd, iron pigment, silicon novel material, photovoltaic new material, new forms of energy.
Background technology
Ferrochrome is that raw material smelting forms with chromite, is mainly used in steel-making additive and produces rustless steel.Chromite is mainly for the production of ferrochrome, chemical industry chromic salts and refractory materials.Within 2012, global ferrochrome ultimate production reaches 9,700,000 tons, and higher than 9,100,000 tons of 2011, major cause is that the output of China increases.Ferrochrome is the important source material of rustless steel.The ferrochrome output of China will account for the 32%-33% of global ultimate production, and South Africa will account for 34%.Due to sought-after to ferrochrome of smelting iron and steel industry, impel ferrochrome manufacturing enterprise to increase, blindly start, there is a sharp increase in output to cause domestic and international ferrochrome to be produced, production capacity is seriously superfluous, drops in price one road, and high chromium ferrochrome product chromium content 62% is down to present 6800 yuan per ton from 13500 yuan per ton of last year.
Ferrochrome production capacity is seriously superfluous, iron and steel is limited the production because of environmental pollution, metallurgy industry faces unprecedented pressure and predicament, many enterprises are in stopping production half end-of-life state, urgent need seeks product marketing, expand new market requirement field, promote metallurgy industry Sustainable development, ensure the healthy and stable development of national economy.
Ferrochrome is applied to products such as producing chromium cpd, iron pigment, silicon novel material, photovoltaic new material, new forms of energy, it is an invention of great significance innovation to ferrochrome use, also be the trend of the development of ferrochrome smelting Diversification and application, can greatly promote ferrochrome Application Areas, form a series of high-end industrial chain newly, significant to the development of ferrochrome metallurgy industry.
Along with international economic integration paces are accelerated, competition among enterprises is growing more intense, the survival and development will be tried to achieve in the international competition of fierceness by enterprise, the necessary adjusting and optimizing industrial structure, Economic Development Mode Conversion, acceleration eliminates the backward production facilities, and guides and promote resource to assemble to strong industry and new and high technology, promotes Industry Structure optimization and upgrading.Enterprise should strengthen Innovation Input from global view, enhances the capacity for independent innovation, and introduces high-new efficient science and technology, and improve overall technology level, comprehensive development in pluralism, enhances one's market competitiveness.Development & production high-tech novel material, new forms of energy, the product of environmental protection and energy saving, meets the international and domestic demand to product innovation novel material.
Original chromic salt production method, adopts reductive agent that sexavalence chromic salts is reduced to chromic salt.Domestic and international mass-producing sexavalence chromic salts manufacturing enterprise 22; wherein 12, China; all be that raw material employing has calcium roasting and calcium-free roasting method to produce chromic salt through high-temperature roasting with chromite; roasting method is produced in the fume gases produced containing harmful hexavalent chromium; produce a large amount of poisonous chromium slag, waste water, very large harm is produced to environment and the mankind.The departments such as government of chromium salt production state of the world, scientific research institution, universities and colleges, group of enterprise, individual all drop into a large amount of manpowers, financial resources, material resources are devoted to innovation, substitute original chromic salts roasting method for seeking a kind of novel process novel method.
At present, China's chromium salt production enterprise cost reversal of the natural order of things, suffer great loss, technique falls behind, and shuffles and waits to raise speed.Expert points out, according to demand both domestic and external and international trend, technical progress must be relied on, adopt the New Technologies novel method of advanced clean energy-saving environmental protection, Economic Development Mode Conversion, promote Chrome Salt Industry industry restructuring and optimization and upgrading, make Chrome Salt Industry go on high in technological content, good in economic efficiency, low in resources consumption, low in the pollution of the environment, that safety is secure sound development road early.
Chromic salts enterprise adopts to have calcium or few calcium roasting method to produce chromic salt both at home and abroad now, and domestic chromium salt production technology of test-manufacturing and promote: the oxidizing Sodium chromate processed of ferrochrome alkali, Pneumatic fluidized tower Continuous Liquid Phase oxidation legal system chromic salt, potassium or sodium system sub-molten salt liquid-phase oxidation legal system chromic salt, because needing, High Temperature High Pressure, sodium or potash consumption are excessive, reaction vessel cost height manufactures difficulty, production cost is high, profit is low or loss, is difficult to suitability for industrialized production.Production technique produces a large amount of chromium slag, and processing cost is high, and process is difficult, the development of serious restriction enterprise and industrial upgrading.
" a kind of production method of high-quality sodium bichromate " of Fia chromic salt manufacturing enterprise Sichuan milky way chemical industry invention, application number: 201310113700.7, publication number: CN103193271A, publication date: 2013.07.10, these methods all need High Temperature High Pressure, need a large amount of alkali in production, high to containers demand, reaction vessel cost is high, large to container infringement in production process, easily produces potential safety hazard simultaneously.Because production cost is high, only have single product Sodium chromate, produce poisonous chromic wastes disposal difficult simultaneously, be difficult to suitability for industrialized production.
Therefore, a kind of environmental protection, clean energy-saving, advanced practical chromium compounds processing condition and method is badly in need of.
Summary of the invention
The object of the invention is to economize on resources and the energy, reduce costs, take ferrochrome as chromium cpd and iron pigment that raw material production goes out high-quality, intensive diversification innovation and development, forms high-end product industrial chain, promotes scientific and technological economy and social development.
The object of the invention is to be reached by following measure:
1. a ferrochrome liquid phase method disposable manufacture chromium cpd conglomerate product innovation technique, it is characterized in that: ferrochrome is worn into fine powder, put into reactor, acid adding dissolves ferrochrome, adds extraordinary material and to heat reaction, make product, chromium compounds: chromium sulphate, chromium chloride, chromic oxide, chromium hydroxide, chromic ammonium alum, chromic salt, iron pigment: Ferrox, ironic hydroxide, barba hispanica, ferriammonium sulfate, Karbam Black, novel material silicon, carbon, new forms of energy hydrogen;
2. be that high carbon ferro-chrome, medium carbon ferrochrome or low carbon ferrochromium wear into the above fine powder of 50 order (or get carbon ferrochrome smelt melting 50 order above fine powder) or chromite or trivalent chromium compound and mixture according to claim 1 Raw ferrochrome, put into reactor, add enough hydrochloric acid or sulfuric acid, heat 15 DEG C-120 DEG C and fully stir, reaction is dissolved, and makes ferrochrome generate ion (Cr completely 3+, Fe 2+) solution, collect hydrogen, obtained product new forms of energy hydrogen;
3. make soluble material become ion, containing Cr according to adding water in claim 2 solution 3+, Fe 2+in solution, throw out is Si, and suspended substance is C, is filtered respectively by solution, obtains filtrate and filter residue, and filter residue, through washing, is separated, dry, obtained product Si and C, and product Si produces polysilicon and silicon single crystal again, and filtrate is containing Cr 3+, Fe 2+solution;
4. add extraordinary material according in claim 3 filtrate: in alkali, oxygenant, Sodium Dimethyldithiocarbamate, yellow prussiate of potash, red prussiate of potash, oxalic acid one or more, make Fe respectively 2+be precipitated as FeC completely 2o 4, Karbam Black, barba hispanica, to filter, washing, dry, obtained product F eC 2o 4, Karbam Black, barba hispanica, filtrate is Cr 3+solution;
5. according to claim 3 (Cr 3+, Fe 2+) add excessive alkali in solution, make Cr 3+become CrO 2 -solution, Fe 2+be precipitated as Fe (OH) completely 2, filter, wash, filter cake is Fe (OH) 2, filtrate is CrO 2 -solution;
(1) .Fe (OH) 2in add extraordinary reactive material: percarbonate (X 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), air, peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), make Fe (OH) 2complete oxidation is Fe (OH) 3, filtration, washing, drying, obtained product F e (OH) 3;
(2) .CrO 2 -add acid in solution, be precipitated as Cr (OH) completely 3, filtration, washing, drying, obtained products C r (OH) 3;
(3) .Cr (OH) 3high-temperature calcination, obtained products C r 2o 3;
(4) .CrO 2 -add acid in solution, make CrO 2 -solution becomes Cr completely 3+solution;
6. according to claim 3 (Cr 3+, Fe 2+) add ammoniumsulphate soln, complete reaction in solution, cool less than 0 DEG C crystallization, filtration, drying, obtained product chromic ammonium alum and ferriammonium sulfate;
(1). add ammoniacal liquor in chromic ammonium alum and be precipitated as Cr (OH) completely 3, filtration, washing, drying, obtained products C r (OH) 3;
(2) .Cr (OH) 3high-temperature calcination, obtained products C r 2o 3;
(3) .Cr (OH) 3add the obtained Cr of acid 3+solution;
7. according to Cr in claim 4,5,6 3+solution produces variant production;
(1) .Cr 3+solution produces chrome tanning agent or trivalent chromium plating solution;
(2) .Cr 3+solution evaporation, crystallization, separation, dry obtained product chromic salt;
(3) .Cr 3+add carbonate, supercarbonate, oxyhydroxide, ammoniacal liquor in solution, make Cr 3+be precipitated as Cr (OH) completely 3, filtration, washing, crystallization, drying, obtained product chromium hydroxide, chromium hydroxide high-temperature calcination obtains product chromium sesquioxide;
(4) .Cr 3+extraordinary reactive material is added: percarbonate (X in solution 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), carbonate (X 2cO 3), alkali (XOH), stirring heating oxidizing reaction, makes Cr in solution 3+be oxidized to Cr 6+, obtained chromatedsolution (CrO 4 2-) or dichromate solution Cr 2o 7 2-;
A. by chromatedsolution (CrO 4 2-) or dichromate solution (Cr 2o 7 2-), evaporative crystallization, is separated, dry, obtained product chromic salt or dichromate;
B. chromatedsolution (CrO 4 2-) in add acidifying (sulfuric acid process, carborization) and make chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), evaporative crystallization, separation, drying, obtained product dichromate;
C. chromium acid sodium solution adds in electrolyzer and carries out electrolysis, makes chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), separation, evaporative crystallization, drying, obtained product dichromate;
8. according to claim 3 filtrate Fe 2+, Cr 3+in solution or in claim 4 solution, add extraordinary reflection material: percarbonate (X 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), carbonate (X 2cO 3), alkali (XOH), stirring heating oxidizing reaction, makes Cr in solution 3+be oxidized to Cr 6+, obtained chromatedsolution (CrO 4 2-) or dichromate solution Cr 2o 7 2-, make Fe in solution 2+be precipitated as Fe (OH) completely 3;
(1). by chromatedsolution (CrO 4 2-) or dichromate solution (Cr 2o 7 2-), evaporative crystallization, is separated, dry, obtained product chromic salt or dichromate;
(2). chromatedsolution (CrO 4 2-) in add acidifying (sulfuric acid process, carborization) and make chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), evaporative crystallization, separation, drying, obtained product dichromate;
(3). chromium acid sodium solution adds in electrolyzer and carries out electrolysis, makes chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), separation, evaporative crystallization, drying, obtained product dichromate;
(4). containing sexavalent chrome Fe (OH) 3in add acid, then add reductive agent FeSO 4, Na 2sO 3, NaHSO 3, Na 2s 2o 2, Na2S makes Cr 6+be reduced to Cr 3+, add alkali and generate Fe (OH) 3with Cr (OH) 3precipitation, separation, filtration, washing, dry obtained product F e (OH) 3with Cr (OH) 3;
9. according to claim 3 (Cr 3+, Fe 2+) solution adds in electrolyzer, and add extraordinary material: percarbonate (X 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), carbonate (X 2cO 3), alkali (XOH), stirring heating oxidizing reaction, energising carry out electrolysis, make chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), make Fe in solution 2+be precipitated as Fe (OH) completely 3, be separated to obtain dichromate solution (Cr 2o 7 2-) and Fe (OH) 3;
(1). dichromate solution (Cr 2o 7 2-) evaporative crystallization, drying, obtained product dichromate;
(2). containing sexavalent chrome Fe (OH) 3in add acid, then add reductive agent FeSO 4, Na 2sO 3, NaHSO 3, Na 2s 2o 5, Na2S makes Cr 6+be reduced to Cr 3+, add alkali and generate Fe (OH) 3with Cr (OH) 3precipitation, separation, filtration, washing, dry obtained product F e (OH) 3with Cr (OH) 3.
In order to better make this invention technology implement suitability for industrialized production as soon as possible, carrying out test on December 16th, 2013 and producing.
Embodiment
1. high carbon ferro-chrome 1000kg is worn into the above fine powder of 200 order, put into reactor, add enough sulfuric acid 3000kg, heat 15 DEG C-100 DEG C and fully stir, reaction is dissolved, and makes ferrochrome generate ion (Cr completely 3+, Fe 2+) solution, collect hydrogen, obtained product new forms of energy 40kg hydrogen;
2. adding water in solution makes soluble material become ion, containing Cr 3+, Fe 2+in solution, throw out is Si, and suspended substance is C, is filtered respectively by solution, obtains filtrate and filter residue, and filter residue, through washing, is separated, dry, obtained product Si:25kg and C:75kg, and product Si produces polysilicon and silicon single crystal again, and filtrate is containing Cr 3+, Fe 2+the metal ion of solution and trace;
3. add oxalic acid 650Kg in filtrate and make Fe 2+be precipitated as FeC completely 2o 4, filtration, washing, crystallization, drying, obtained product F eC 2o 4: 1100kg, filtrate is Cr 3+solution and trace element, then add Sodium Dimethyldithiocarbamate O.05kg, remove the metal ion of other trace, filter containing Cr 3+filtrate;
4. according to Cr in step 3 3+solution produces variant production;
(1) .Cr 3+the obtained product chromium sulphate 1500kg of solution evaporation drying;
(2) .Cr 3+add sodium hydroxide 500kg in solution, make Cr 3+be precipitated as Cr (OH) 3, filtration, washing, crystallization, drying, obtained product chromium hydroxide: 420kg, chromium hydroxide high-temperature calcination obtains product chromium sesquioxide: 310kg;
(3) .Cr 3+extraordinary reflection material is added: Sodium Persulfate, peroxide salt sodium, sodium carbonate 300kg, stirring heating oxidizing reaction, makes Cr in solution in solution 3+be oxidized to Cr 6+, obtained chromium acid sodium solution,
By chromium acid sodium solution, evaporative crystallization, is separated, dry, obtained product Sodium chromate 350kg.
5. go out new forms of energy hydrogen 40kg according to above manufacture technics, new forms of energy battery material: Ferrox 1100kg, silicon 25kg, carbon 75kg, chromium sulphate 1500kg, chromic oxide 310kg, chromium hydroxide 420kg.
Facts have proved that this invented technology is advanced, energy-conserving and environment-protective, without waste residue, without waste gas, non-wastewater discharge.Without the need to High Temperature High Pressure, being that raw material liquid phase method is disposable with ferrochrome produces the products such as chromium cpd, pigment, new forms of energy, new forms of energy silicon-carbon battery material, form a series of high-end industrial chain newly, revolutionize original ferrochrome purposes single, produce simple situation; Change original chromate compound baked for producing and produce the production technique of high pollution to the large backwardness of environmental hazard, make the production of chromium cpd go on energy-conserving and environment-protective, the development of high benefit; Great ferrochrome Diversification of having expanded develops and Application Areas, greatly strengthen Enterprise International Competition, promotes national industry optimization and upgrading and development, significant.

Claims (9)

1. a ferrochrome liquid phase method disposable manufacture chromium cpd conglomerate product innovation technique, it is characterized in that: ferrochrome is worn into fine powder, put into reactor, acid adding dissolves ferrochrome, adds extraordinary material and to heat reaction, make product, chromium compounds: chromium sulphate, chromium chloride, chromic oxide, chromium hydroxide, chromic ammonium alum, chromic salt, iron pigment: Ferrox, ironic hydroxide, barba hispanica, ferriammonium sulfate, Karbam Black, novel material silicon, carbon, new forms of energy hydrogen.
2. be that high carbon ferro-chrome, medium carbon ferrochrome or low carbon ferrochromium wear into the above fine powder of 50 order (or get carbon ferrochrome smelt melting 50 order above fine powder) or chromite or trivalent chromium compound and mixture according to claim 1 Raw ferrochrome, put into reactor, add enough hydrochloric acid or sulfuric acid, heat 15 DEG C-120 DEG C and fully stir, reaction is dissolved, and makes ferrochrome generate ion (Cr completely 3+, Fe 2+) solution, collect hydrogen, obtained product new forms of energy hydrogen.
3. make soluble material become ion, containing Cr according to adding water in claim 2 solution 3+, Fe 2+in solution, throw out is Si, and suspended substance is C, is filtered respectively by solution, obtains filtrate and filter residue, and filter residue, through washing, is separated, dry, obtained product Si and C, and product Si produces polysilicon and silicon single crystal again, and filtrate is containing Cr 3+, Fe 2+solution.
4. add extraordinary material according in claim 3 filtrate: in alkali, oxygenant, Sodium Dimethyldithiocarbamate, yellow prussiate of potash, red prussiate of potash, oxalic acid one or more, make Fe respectively 2+be precipitated as FeC completely 2o 4, Karbam Black, barba hispanica, to filter, washing, dry, obtained product F eC 2o 4, Karbam Black, barba hispanica, filtrate is Cr 3+solution.
5. according to claim 3 (Cr 3+, Fe v) add excessive alkali in solution, make Cr 3+become CrO 2 -solution, Fe 2+be precipitated as Fe (OH) completely 2, filter, wash, filter cake is Fe (OH) 2, filtrate is CrO 2 -solution;
(1) .Fe (OH) 2in add extraordinary reactive material: percarbonate (X 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), air, peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), make Fe (OH) 2complete oxidation is Fe (OH) 3, filtration, washing, drying, obtained product F e (OH) 3;
(2) .CrO 2 -add acid in solution, be precipitated as Cr (OH) completely 3, filtration, washing, drying, obtained products C r (OH) 3;
(3) .Cr (OH) 3high-temperature calcination, obtained products C r 2o 3;
(4) .CrO 2 -add acid in solution, make CrO 2 -solution becomes Cr completely 3+solution.
6. according to claim 3 (Cr 3+, Fe 2+) add ammoniumsulphate soln, complete reaction in solution, cool less than 0 DEG C crystallization, filtration, drying, obtained product chromic ammonium alum and ferriammonium sulfate;
(1). add ammoniacal liquor in chromic ammonium alum and be precipitated as Cr (OH) completely 3, filtration, washing, drying, obtained products C r (OH) 3;
(2) .Cr (OH) 3high-temperature calcination, obtained products C r 2o 3;
(3) .Cr (OH) 3add the obtained Cr of acid 3+solution.
7. according to Cr in claim 4,5,6 3+solution produces variant production;
(1) .Cr 3+solution produces chrome tanning agent or trivalent chromium plating solution;
(2) .Cr 3+solution evaporation, crystallization, separation, dry obtained product chromic salt;
(3) .Cr 3+add carbonate, supercarbonate, oxyhydroxide, ammoniacal liquor in solution, make Cr 3+be precipitated as Cr (OH) completely 3, filtration, washing, crystallization, drying, obtained product chromium hydroxide, chromium hydroxide high-temperature calcination obtains product chromium sesquioxide;
(4) .Cr 3+extraordinary reactive material is added: percarbonate (X in solution 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), carbonate (X 2cO 3), alkali (XOH), stirring heating oxidizing reaction, makes Cr in solution 3+be oxidized to Cr 6+, obtained chromatedsolution (CrO 4 2-) or dichromate solution Cr 2o 7 2-;
A. by chromatedsolution (CrO 4 2-) or dichromate solution (Cr 2o 7 2-), evaporative crystallization, is separated, dry, obtained product chromic salt or dichromate;
B. chromatedsolution (CrO 4 2-) in add acidifying (sulfuric acid process, carborization) and make chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), evaporative crystallization, separation, drying, obtained product dichromate;
C. chromium acid sodium solution adds in electrolyzer and carries out electrolysis, makes chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), separation, evaporative crystallization, drying, obtained product dichromate.
8. according to claim 3 filtrate Fe 2+, Cr 3+in solution or in claim 4 solution, add extraordinary reflection material: percarbonate (X 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), carbonate (X 2cO 3), alkali (XOH), stirring heating oxidizing reaction, makes Cr in solution 3+be oxidized to Cr 6+, obtained chromatedsolution (CrO 4 2-) or dichromate solution Cr 2o 7 2-, make Fe in solution 2+be precipitated as Fe (OH) completely 3;
(1). by chromatedsolution (CrO 4 2-) or dichromate solution (Cr 2o 7 2-), evaporative crystallization, is separated, dry, obtained product chromic salt or dichromate;
(2). chromatedsolution (CrO 4 2-) in add acidifying (sulfuric acid process, carborization) and make chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), evaporative crystallization, separation, drying, obtained product dichromate;
(3). chromium acid sodium solution adds in electrolyzer and carries out electrolysis, makes chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), separation, evaporative crystallization, drying, obtained product dichromate;
(4). containing sexavalent chrome Fe (OH) 3in add acid, then add reductive agent FeSO 4, Na 2sO 3, NaHSO 3, Na 2s 2o 5, Na2S makes Cr 6+be reduced to Cr 3+, add alkali and generate Fe (OH) 3with Cr (OH) 3precipitation, separation, filtration, washing, dry obtained product F e (OH) 3with Cr (OH) 3.
9. according to claim 3 (Cr 3+, Fe 2+) solution adds in electrolyzer, and add extraordinary material: percarbonate (X 2cO 4), persulphate (X 2s 2o 8), hydrogen peroxide (H 2o 2), oxygen (O 2), peroxide salt (X 2o 2), permanganate (XMnO 4), hypochlorite (XCIO), carbonate (X 2cO 3), alkali (XOH), stirring heating oxidizing reaction, energising carry out electrolysis, make chromatedsolution (CrO 4 2-) generate dichromate solution (Cr completely 2o 7 2-), make Fe in solution 2+be precipitated as Fe (OH) completely 3, be separated to obtain dichromate solution (Cr 2o 7 2-) and Fe (OH) 3;
(1). dichromate solution (Cr 2o 7 2-) evaporative crystallization, drying, obtained product dichromate;
(2). containing sexavalent chrome Fe (OH) 3in add acid, then add reductive agent FeSO 4, Na 2sO 3, NaHSO 3, Na 2s 2o 5, Na2S makes Cr 6+be reduced to Cr 3+, add alkali and generate Fe (OH) 3with Cr (OH) 3precipitation, separation, filtration, washing, dry obtained product F e (OH) 3with Cr (OH) 3.
CN201410208208.2A 2014-05-13 2014-05-13 One-off manufacturing technology of chromium compounds and new products in many industries by liquid phase method of ferrochromium Pending CN105084419A (en)

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CN110015689A (en) * 2019-05-22 2019-07-16 徐鑫磊 High carbon ferro-chrome clean manufacturing chromium oxyhydroxide, the production technology of chromic salts series of products

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