CN102092776A - Method for producing ordinary zinc chloride and calcium hydroxide by using sodium hydrosulfite filtration residues - Google Patents
Method for producing ordinary zinc chloride and calcium hydroxide by using sodium hydrosulfite filtration residues Download PDFInfo
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- CN102092776A CN102092776A CN2010102754645A CN201010275464A CN102092776A CN 102092776 A CN102092776 A CN 102092776A CN 2010102754645 A CN2010102754645 A CN 2010102754645A CN 201010275464 A CN201010275464 A CN 201010275464A CN 102092776 A CN102092776 A CN 102092776A
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- zinc chloride
- calcium hydroxide
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Abstract
The invention provides a method for producing ordinary zinc chloride and calcium hydroxide by using sodium hydrosulfite filtration residues, which comprises the following steps of: chemically reacting zinc hydroxide and calcium chloride in the sodium hydrosulfite filtration residues to obtain a mixture containing zinc chloride and the calcium hydroxide; filtering the mixture to obtain clear zinc chloride-containing filtrate and a white calcium hydroxide-containing filter cake; performing washing, drying and crushing on the white calcium hydroxide-containing filter cake to obtain the calcium hydroxide product; and removing impurities from the zinc chloride-containing filtrate, introducing the zinc chloride-containing filtrate into a distiller, distilling the zinc chloride-containing filtrate to obtain saturated solution of zinc chloride, cooling the saturated solution of zinc chloride, separating zinc chloride crystals out, performing filtration to obtain the zinc chloride crystals, and performing washing, drying and crushing on the obtained zinc chloride crystals to obtain the zinc chloride crystal products.
Description
Technical field
The present invention relates to the technical field of the improvement and the utilization of vat powder filter residue, particularly a kind of method of producing common zinc chloride co-producing calcium hydroxide with the vat powder filter residue.
Background technology
Vat powder is being commonly called as of V-Brite B (Sodium Hydrosulfite), is a kind of strong reductant, is widely used in weaving, printing and dyeing industry, make dyeing auxiliaries and SYNTHETIC OPTICAL WHITNER, also be medicine industry simultaneously, the raw material of synthetic dyestuff also is applied to copperplate printing and analytical reagent etc.
In recent years, market is vigorous day by day to the demand of vat powder, growth is very fast.Particularly weaving, printing and dyeing industry grow steadily to the vat powder demand, and 10～15% ascensional range is all arranged every year.In addition, be accompanied by the production exploitation of domestic high-grade newsprinting paper, the raising of kaolin quality, this potential vat powder market slowly highlights, and market potential is also in quick increase.At present, the total consumption of international insurance powder is 500,000 tons/year; China's 07 annual export volume is 8～100,000 tons/year; 08 annual export volume is 12～150,000 tons; 09 annual export volume is near 200,000 tons; Export volume obviously increases, and is maximum in the world vat powder export State.And domestic consumption is greatly about 20～250,000 tons/year.
The production method of vat powder mainly contains zinc powder method, sodium formate method and amalgamation process.At present, it mainly is preceding two kinds for industrial application.Wherein, the three wastes of sodium amalgam method production technique are handled and labour protection requires comparatively strictness, and power consumption is higher, seldom is used industrial.Sodium formate method production technology maturation, flow process is brief, and the waste water generation is few, but product purity is lower, less stable; And zinc powder method mature production technology, product purity height, good stability are the main production methods of using in the industry.
It is to be sulfur dioxide gas processing zinc powder aqueous suspension more than 99% with purity that the zinc powder method is produced vat powder, generate the SODIUM HYDROSULPHITE zinc solution, add sodium hydroxide then and carry out replacement(metathesis)reaction, generate V-Brite B and zinc hydroxide precipitation, obtain containing V-Brite B after the filtering separation and contain the sedimentary waste residue of zinc hydroxide.Filtrate is saltoutd with strong brine, more after filtration, separate, after the dehydration, with washing with alcohol, drying and must V-Brite B.Thereby the production process of vat powder has been discharged the filter cake waste residue that contains zinc hydroxide in a large number through press filtration.The zinc hydroxide waste residue is a kind of strong alkaline substance, is piled up if do not handle the corrosion in soil and alkalescence to be solidified all very serious, and especially the white dust kicked up of wind makes us suffocating especially.At present, Chang Yong treatment process is for recycling with zinc hydroxide waste residue oxygenerating zinc or metallic zinc.Its purposes is comparatively single, can not consume the increase that is accompanied by the vat powder turnout far away and the zinc powder waste residue that increases day by day.
In addition, zinc chloride is a kind of important industrial raw material, can be as dewatering agent, the catalyzer of organic synthesis industry, and the mordant of dyeing and weaving industry, sizing agent and weighting agent, also as oil scavenging agent and activated carbon activator, because the affinity of materials such as zinc chloride and silk, Mierocrystalline cellulose, it can be used as the noninflammable material of dress material, also can be used on fabric smell purificant, zinc chloride can be attacked metal oxide (MO) and generate MZnOCl2, Here it is it as the principle of metal solder flux.Also be used for aspects such as battery, fiber board, plating, medicine, wood preservation, agricultural chemicals and welding.Along with being on the increase of compact electric apparatus, industrial developments such as oil, organic synthesis simultaneously are swift and violent in recent years, and requirement is also increasing in large quantities, thereby has promoted the industrial development of zinc chloride.
Summary of the invention
The objective of the invention is to, a kind of method of producing common zinc chloride co-producing calcium hydroxide with the vat powder filter residue is provided, this method turns waste into wealth, effectively the zinc hydroxide in the vat powder filter residue is converted into zinc chloride and the co-producing calcium hydroxide that has than the large economy meaning, fully excavate and utilized vat powder filter residue potential economic worth, also comprehensive utilization and the improvement for the vat powder filter residue provides new approach.
Technical scheme of the present invention is as follows: a kind of method of producing common zinc chloride co-producing calcium hydroxide with the vat powder filter residue comprises following concrete steps:
Steps A: the content of zinc hydroxide in the filter residue of conversion vat powder, and, be configured to suspension liquid with the pulverizing of vat powder filter residue, dispose calcium chloride solution simultaneously;
Step B: is 1 with the suspension liquid of steps A configuration and calcium chloride solution by the pure substance mass ratio of zinc hydroxide and calcium chloride: 0.92-1.32 puts in first corrosion-resistant reactor (1) successively, carry out chemical reaction under stirring, obtain containing the mixture of zinc chloride and calcium hydroxide;
Step C: the mixture that contains zinc chloride and calcium hydroxide of step B gained is filtered through first strainer (2), obtain the clarifying white filter cake that contains the filtrate of zinc chloride and contain calcium hydroxide;
Step D: through first washing machine (3) washing, first moisture eliminator (4) drying, first pulverizer (5) is pulverized, and obtains calcium hydroxide product (6) with the white filter cake that contains calcium hydroxide of step C gained;
Step e: the filtrate that contains zinc chloride of step C gained is mixed with an amount of zinc hydroxide in second corrosion-resistant reactor (7), remove impurity, and make the muriate in the filtrate be converted into zinc chloride fully;
Step F: the reaction product of step e gained is filtered through second strainer (8), obtain purified liquor zinci chloridi;
Step G: the purified liquor zinci chloridi of step F gained is sent into the saturated solution that is distilled to zinc chloride in the distiller (9), the saturated solution of zinc chloride is sent into cooling in the water cooler (10), separate out the zinc chloride crystal, filter through the 3rd strainer (11), obtain the zinc chloride crystal, gained zinc chloride crystal dries through second washing machine (12) washing, and second pulverizer (13) is pulverized, and obtains zinc chloride crystal product (14).
The described calcium chloride of steps A is the waste ammonia-soda solution that contains calcium chloride.
Chemical principle of the present invention is:
Zn(OH)
2+CaCl
2＝＝＝＝＝ZnCl
2+Ca(OH)
2
The invention has the beneficial effects as follows: method of producing common zinc chloride co-producing calcium hydroxide with the vat powder filter residue of the present invention, turn waste into wealth, effectively the zinc hydroxide in the vat powder filter residue is converted into the zinc chloride that has than the large economy meaning, fully excavate and utilized vat powder filter residue potential economic worth, also comprehensive utilization and the improvement for the vat powder filter residue provides new approach.In addition, this method raw material availability height, the refuse of producing gained is few, is a very cost-effective method.
Description of drawings
Fig. 1 produces the process flow sheet of the method for common zinc chloride co-producing calcium hydroxide for of the present invention with the vat powder filter residue, wherein,
(1)--first corrosion-resistant reactor, (2)--first strainer, (3)--first washing machine, (4)--first moisture eliminator, (5)--first pulverizer, (6)--calcium hydroxide product, (7)--second corrosion-resistant reactor, (8)--second strainer, (9)--distiller, (10)--water cooler, (11)--the 3rd strainer, (12)--second washing machine, (13)--second pulverizer, (14)--zinc chloride crystal product.
Embodiment
Embodiment 1
With reference to Fig. 1, a kind of method of producing common zinc sulfate co-producing calcium hydroxide with the vat powder filter residue, weighing 495kg vat powder, the content of zinc hydroxide is 297kg in the filter residue of conversion vat powder, and the vat powder filter residue pulverized, be configured to suspension liquid, convert the calcium chloride content in the waste ammonia-soda solution simultaneously, the configuration calcium chloride solution; Is successively to put in first corrosion-resistant reactor (1) at 1: 1.32 the suspension liquid of configuration and calcium chloride solution by the pure substance mass ratio of zinc hydroxide and calcium chloride, carries out chemical reaction under stirring, and obtains containing the mixture of zinc chloride and calcium hydroxide; The mixture that contains zinc chloride and calcium hydroxide of gained is filtered through first strainer (2), obtain the clarifying white filter cake that contains the filtrate of zinc chloride and contain calcium hydroxide; The white filter cake that will contain calcium hydroxide is through first washing machine (3) washing, first moisture eliminator (4) drying, and first pulverizer (5) is pulverized, and obtains calcium hydroxide product (6), and the quality of the pure substance of the calcium hydroxide that it contains is 222kg; The filtrate that contains zinc chloride of gained is mixed with an amount of zinc hydroxide in second corrosion-resistant reactor (7), remove impurity, and making the muriate in the filtrate be converted into zinc chloride fully, the reaction product of gained is filtered through second strainer (8), obtains purified liquor zinci chloridi; Purified liquor zinci chloridi is sent into the saturated solution that is distilled to zinc chloride in the distiller (9), the saturated solution of zinc chloride is sent into cooling in the water cooler (10), separate out the zinc chloride crystal, filter through the 3rd strainer (11), obtain the zinc chloride crystal, gained zinc chloride crystal dries through second washing machine (12) washing, and second pulverizer (13) is pulverized, obtain zinc chloride crystal product (14), the quality of the pure substance of the zinc chloride that it contains is 408kg.
With reference to Fig. 1, a kind of method of producing common zinc sulfate co-producing calcium hydroxide, weighing 495kg vat powder with the vat powder filter residue, the content of zinc hydroxide is 297kg in the filter residue of conversion vat powder, and, be configured to suspension liquid with the pulverizing of vat powder filter residue, dispose calcium chloride solution simultaneously; Is successively to put in first corrosion-resistant reactor (1) at 1: 1.12 the suspension liquid of configuration and calcium chloride solution by the pure substance mass ratio of zinc hydroxide and calcium chloride, carries out chemical reaction under stirring, and obtains containing the mixture of zinc chloride and calcium hydroxide; The mixture that contains zinc chloride and calcium hydroxide of gained is filtered through first strainer (2), obtain the clarifying white filter cake that contains the filtrate of zinc chloride and contain calcium hydroxide; The white filter cake that will contain calcium hydroxide is through first washing machine (3) washing, first moisture eliminator (4) drying, and first pulverizer (5) is pulverized, and obtains calcium hydroxide product (6), and the quality of the pure substance of the calcium hydroxide that it contains is 222kg; The filtrate that contains zinc chloride of gained is mixed with an amount of zinc hydroxide in second corrosion-resistant reactor (7), remove impurity, and making the muriate in the filtrate be converted into zinc chloride fully, the reaction product of gained is filtered through second strainer (8), obtains purified liquor zinci chloridi; Purified liquor zinci chloridi is sent into the saturated solution that is distilled to zinc chloride in the distiller (9), the saturated solution of zinc chloride is sent into cooling in the water cooler (10), separate out the zinc chloride crystal, filter through the 3rd strainer (11), obtain the zinc chloride crystal, gained zinc chloride crystal dries through second washing machine (12) washing, and second pulverizer (13) is pulverized, obtain zinc chloride crystal product (14), the quality of the zinc chloride pure substance that it contains is 408kg.
Embodiment 3
With reference to Fig. 1, a kind of method of producing common zinc sulfate co-producing calcium hydroxide, weighing 495kg vat powder with the vat powder filter residue, the content of zinc hydroxide is 297kg in the filter residue of conversion vat powder, and, be configured to suspension liquid with the pulverizing of vat powder filter residue, dispose calcium chloride solution simultaneously; Is successively to put in first corrosion-resistant reactor (1) at 1: 0.92 the suspension liquid of configuration and calcium chloride solution by the pure substance mass ratio of zinc hydroxide and calcium chloride, carries out chemical reaction under stirring, and obtains containing the mixture of zinc chloride and calcium hydroxide; The mixture that contains zinc chloride and calcium hydroxide of gained is filtered through first strainer (2), obtain the clarifying white filter cake that contains the filtrate of zinc chloride and contain calcium hydroxide; The white filter cake that will contain calcium hydroxide is through first washing machine (3) washing, first moisture eliminator (4) drying, and first pulverizer (5) is pulverized, and obtains calcium hydroxide product (6), and the quality of the pure substance of the calcium hydroxide that it contains is 60.182.16kg; The filtrate that contains zinc chloride of gained is mixed with an amount of zinc hydroxide in second corrosion-resistant reactor (7), remove impurity, and making the muriate in the filtrate be converted into zinc chloride fully, the reaction product of gained is filtered through second strainer (8), obtains purified liquor zinci chloridi; Purified liquor zinci chloridi is sent into the saturated solution that is distilled to zinc chloride in the distiller (9), the saturated solution of zinc chloride is sent into cooling in the water cooler (10), separate out the zinc chloride crystal, filter through the 3rd strainer (11), obtain the zinc chloride crystal, gained zinc chloride crystal dries through second washing machine (12) washing, and second pulverizer (13) is pulverized, obtain zinc chloride crystal product (14), the quality of the zinc chloride pure substance that it contains is 334.77kg.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, its framework form can be flexible and changeable, can the subseries method.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of being submitted to.
Claims (2)
1. a method of producing common zinc chloride co-producing calcium hydroxide with the vat powder filter residue is characterized in that, comprises following concrete steps:
Steps A: the content of zinc hydroxide in the filter residue of conversion vat powder, and, be configured to suspension liquid with the pulverizing of vat powder filter residue, dispose calcium chloride solution simultaneously;
Step B: is 1 with the suspension liquid of steps A configuration and calcium chloride solution by the pure substance mass ratio of zinc hydroxide and calcium chloride: 0.92-1.32 puts in first corrosion-resistant reactor (1) successively, carry out chemical reaction under stirring, obtain containing the mixture of zinc chloride and calcium hydroxide;
Step C: the mixture that contains zinc chloride and calcium hydroxide of step B gained is filtered through first strainer (2), obtain the clarifying white filter cake that contains the filtrate of zinc chloride and contain calcium hydroxide;
Step D: through first washing machine (3) washing, first moisture eliminator (4) drying, first pulverizer (5) is pulverized, and obtains calcium hydroxide product (6) with the white filter cake that contains calcium hydroxide of step C gained;
Step e: the filtrate that contains zinc chloride of step C gained is mixed with an amount of zinc hydroxide in second corrosion-resistant reactor (7), remove impurity, and make the muriate in the filtrate be converted into zinc chloride fully;
Step F: the reaction product of step e gained is filtered through second strainer (8), obtain purified liquor zinci chloridi;
Step G: the purified liquor zinci chloridi of step F gained is sent into the saturated solution that is distilled to zinc chloride in the distiller (9), the saturated solution of zinc chloride is sent into cooling in the water cooler (10), separate out the zinc chloride crystal, filter through the 3rd strainer (11), obtain the zinc chloride crystal, gained zinc chloride crystal dries through second washing machine (12) washing, and second pulverizer (13) is pulverized, and obtains zinc chloride crystal product (14).
2. method of producing common zinc chloride co-producing calcium hydroxide with the vat powder filter residue as claimed in claim 1 is characterized in that, the described calcium chloride of steps A is the waste ammonia-soda solution that contains calcium chloride.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102754645A CN102092776A (en) | 2010-09-06 | 2010-09-06 | Method for producing ordinary zinc chloride and calcium hydroxide by using sodium hydrosulfite filtration residues |
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|---|---|---|---|
| CN2010102754645A CN102092776A (en) | 2010-09-06 | 2010-09-06 | Method for producing ordinary zinc chloride and calcium hydroxide by using sodium hydrosulfite filtration residues |
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Application publication date: 20110615 |