CN101580265A - Method for preparing gypsum and dry ice from limestone and waste sulfuric acid - Google Patents
Method for preparing gypsum and dry ice from limestone and waste sulfuric acid Download PDFInfo
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- CN101580265A CN101580265A CNA2009100384871A CN200910038487A CN101580265A CN 101580265 A CN101580265 A CN 101580265A CN A2009100384871 A CNA2009100384871 A CN A2009100384871A CN 200910038487 A CN200910038487 A CN 200910038487A CN 101580265 A CN101580265 A CN 101580265A
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- gypsum
- dry ice
- wingdale
- acid
- hydrochloric acid
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Abstract
The invention discloses a method for preparing gypsum and dry ice from limestone and waste sulfuric acid, which has the main technical characteristics of: reacting limestone with hydrochloric acid to produce calcium chloride and carbon dioxide; producing dry ice by using the carbon dioxide and reacting the calcium chloride with the waste sulfuric acid to produce a mixed solution of white gypsum and hydrochloric acid; and after suction filtration of the mixed solution to suction, returning the filtrate and hydrochloric acid to the previous step for recycling, and washing a filter cake for three times, and dehydrating, drying and crushing the filter cake to obtain finished gypsum. The method can effectively fulfill the goal of comprehensive treatment of waste materials, rationally avoid the delayed treatment of the waste materials due to the lack of coexistence of regional waste materials and lack of raw materials and create excellent economic value for the enterprises.
Description
Technical field:
The present invention relates to the technical field of three chemical wastes, particularly a kind of with Wingdale and the gypsum of sulfur waste acid preparation and the method for dry ice.
Technical background:
Learn from existing patented technology ZL2005100777181: can also make the method for gypsum and gac and green vitriol on the basis of administering sulfur waste acid and carbide slag, patent name is the patent of invention of " with the method for sulfur waste acid and carbide slag coproduction gypsum and gac and green vitriol ".Characteristics so of the present invention are for sulfur waste acid and two kinds of waste materials of carbide slag, are not all at areal and deposit, and more have only a kind of waste material.Want to take the good improvement of sulfur waste acid the improvement method of plurality of raw materials, and it is that the comparison popularization and application is got up more convenient that limestone mine grows on trees.The application of patent of the present invention is unlikely to be caused chemical spent material not handle by the shortage of certain raw material, so the present invention just has been born.
Summary of the invention:
The purpose of this invention is to provide a kind of with Wingdale and the gypsum of sulfur waste acid preparation and the method for dry ice, adopting said method not only can effectively reach the purpose of comprehensive regulation waste material, and, can also reasonably avoid because regional waste material can not simultaneously and be deposited the bad phenomenon that there is lack of raw materials and cause waste material in time not administer, but also can create good economic worth for enterprise.
To achieve the above object, technical scheme of the present invention is:
When Wingdale after the purification and sulfur waste acid act on the gypsum that makes again, go back by-product dry ice.Its concrete scavenging process is:
The limestone powder water is adjusted to emulsion and the dilute hydrochloric acid mass ratio 1 with pure substance: 0.53-0.93 is mixed in reactor (1) lining, after slowly stirring complete reaction suction filtration (2) purified calcium chloride and carbonic acid gas.Carbonic acid gas enters dry ice synthesizer (3) pressurization cooling through super-dry and purification and obtains solid dry ice;
Again the calcium chloride that obtains with 1; 0.68-1.08 inject surplus in proportion useless vitriolic synthesizer (4) lining that has, obtain the sulfate precipitate calcium (gypsum) and the hydrochloric acid mixed solution of white through slow stirring reaction.Suction filtration (5) and wash three times white gypsum, filtrate hydrochloric acid returns last process and recycles.The white gypsum is drying (6) again, enters finishing room (8) pulverizing (7) and obtains the gypsum finished product.Its chemical principle is:
CaCO
3+2HCl＝CaCl
2+CO
2+H
2O
CaCl
2+H
2SO
4＝CaSO
4+2HCl
Description of drawings:
This figure is a process flow sheet of the present invention, wherein
1---reactor, 2---suction filter pump, 3---the dry ice synthesizer, 4---the finished product synthesizer, 5---suction filter pump, 6---baker, 7---broken machine, 8---finishing room, 9---the hydrochloric acid circular route, 10---the carbon dioxide recovery line.
Concrete embodiment:
Embodiment one: Wingdale and hydrochloric acid with 400kg are mixed in reactor (1) lining with the pure substance mass ratio at 1: 0.53, and suction filtration (2) gets purified calcium chloride 322.36kg and carbonic acid gas after slowly stirring complete reaction.Carbonic acid gas is through purifying, and drying enters dry ice synthesizer (3) pressurization cooling and obtains solid 127kg dry ice.Again the calcium chloride that obtains with 1; 0.68 inject surplus in proportion useless vitriolic synthesizer (4) lining that has, obtain the sulfate precipitate calcium (gypsum) and the hydrochloric acid mixed solution of white through slow stirring reaction.Suction filtration (5) and wash white gypsum three times, filtrate hydrochloric acid returns last process and recycles.The white gypsum is drying (6) again, enters finishing room (8) pulverizing (7) and obtains 304.2kg gypsum finished product.
Embodiment two: Wingdale and hydrochloric acid with 400kg are mixed in reactor (1) lining with the pure substance mass ratio at 1: 0.93, and suction filtration (2) gets purified calcium chloride 444kg and carbonic acid gas after slowly stirring complete reaction.Carbonic acid gas is through purifying, and drying enters dry ice synthesizer (3) pressurization cooling and obtains solid 176kg dry ice.Again the calcium chloride that obtains is injected surplus in proportion useless vitriolic synthesizer (4) lining that has with 1: 1.08, obtain the sulfate precipitate calcium (gypsum) and the hydrochloric acid mixed solution of white through slow stirring reaction.Suction filtration (5) and wash three times white gypsum, filtrate hydrochloric acid returns last process and recycles.The white gypsum is drying (6) again, enters finishing room (8) pulverizing (7) and obtains 544kg gypsum finished product.
Claims (5)
1 one kinds with the gypsum of Wingdale and sulfur waste acid preparation and the method for dry ice, is by obtaining with sour the acting on of Wingdale behind the salt acid purification and sulfur waste.Its technical characterictic is that Wingdale and the sulfur waste acid behind the salt acid purification acts on according to a certain percentage, goes back by-product dry ice when obtaining gypsum.
2 claims 1 are described a kind of with the gypsum of Wingdale and sulfur waste acid preparation and the method for dry ice, it is characterized in that acting on Wingdale behind the salt acid purification and sulfur waste acid, go back by-product dry ice in again obtaining gypsum, and its concrete scavenging process is:
The limestone powder water is adjusted to emulsion and the dilute hydrochloric acid mass ratio 1 with pure substance: 0.53-0.93 is mixed in reactor (1) lining, after slowly stirring complete reaction suction filtration (2) purified calcium chloride and carbonic acid gas.Carbonic acid gas enters dry ice synthesizer (3) pressurization cooling through super-dry and purification and obtains solid dry ice.
3 claims 1 and 2 described a kind of with the gypsum of Wingdale and sulfur waste acid preparation and the methods of dry ice is characterized in that acting on Wingdale behind the salt acid purification and sulfur waste acid, go back by-product dry ice in again obtaining gypsum, and its concrete technical process is:
Again the calcium chloride that obtains with 1; 0.68-1.08 inject surplus in proportion useless vitriolic synthesizer (4) lining that has, obtain the sulfate precipitate calcium (gypsum) and the hydrochloric acid mixed solution of white through slow stirring reaction.Suction filtration (5) and wash three times white gypsum, filtrate hydrochloric acid returns last process and recycles.The white gypsum is drying (6) again, enters finishing room (8) pulverizing (7) and obtains the gypsum finished product.
4 claims 2 are described a kind of with Wingdale and the gypsum of sulfur waste acid preparation and the method for dry ice, it is characterized in that describedly being mixed in reactor (1) lining with mass ratio 1: 0.53-0.93 with Wingdale and hydrochloric acid, after slowly stirring complete reaction suction filtration (2) purified calcium chloride and carbonic acid gas.Carbonic acid gas enters dry ice synthesizer (3) pressurization cooling through super-dry and purification and obtains solid dry ice.
5 claims 3 are described a kind of with the gypsum of Wingdale and sulfur waste acid preparation and the method for dry ice, it is characterized in that described again the calcium chloride that obtains with 1; 0.68-1.08 inject surplus in proportion useless vitriolic synthesizer (4) lining that has, obtain the sulfate precipitate calcium (gypsum) and the hydrochloric acid mixed solution of white through slow stirring reaction.Suction filtration (5) and wash three times white gypsum, filtrate hydrochloric acid returns last process and recycles.The white gypsum is drying (6) again, enters finishing room (8) pulverizing (7) and obtains the gypsum finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100384871A CN101580265A (en) | 2009-04-08 | 2009-04-08 | Method for preparing gypsum and dry ice from limestone and waste sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100384871A CN101580265A (en) | 2009-04-08 | 2009-04-08 | Method for preparing gypsum and dry ice from limestone and waste sulfuric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101580265A true CN101580265A (en) | 2009-11-18 |
Family
ID=41362606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100384871A Pending CN101580265A (en) | 2009-04-08 | 2009-04-08 | Method for preparing gypsum and dry ice from limestone and waste sulfuric acid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477616A (en) * | 2015-08-25 | 2017-03-08 | 住友大阪水泥株式会社 | The manufacture method of Gypsum Fibrosum and the manufacture method of cement composition |
| CN108939370A (en) * | 2018-07-24 | 2018-12-07 | 万志平 | A kind of Household movable multifunctional fire extinguishing device |
| CN109432661A (en) * | 2018-11-09 | 2019-03-08 | 叶德美 | A kind of multifunctional fire-fighting smoke exhaust extinguishing device |
| CN109516489A (en) * | 2019-01-09 | 2019-03-26 | 内蒙古巴迪实业科技股份公司 | A kind of round-robin method and system of the zero-emission of exhaust gas waste water and dregs |
-
2009
- 2009-04-08 CN CNA2009100384871A patent/CN101580265A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106477616A (en) * | 2015-08-25 | 2017-03-08 | 住友大阪水泥株式会社 | The manufacture method of Gypsum Fibrosum and the manufacture method of cement composition |
| CN106477616B (en) * | 2015-08-25 | 2020-05-19 | 住友大阪水泥株式会社 | Method for producing gypsum and method for producing cement composition |
| CN108939370A (en) * | 2018-07-24 | 2018-12-07 | 万志平 | A kind of Household movable multifunctional fire extinguishing device |
| CN109432661A (en) * | 2018-11-09 | 2019-03-08 | 叶德美 | A kind of multifunctional fire-fighting smoke exhaust extinguishing device |
| CN109432661B (en) * | 2018-11-09 | 2020-07-28 | 河北鑫隆安全技术有限公司 | Multifunctional smoke-discharging fire-extinguishing device for fire fighting |
| CN109516489A (en) * | 2019-01-09 | 2019-03-26 | 内蒙古巴迪实业科技股份公司 | A kind of round-robin method and system of the zero-emission of exhaust gas waste water and dregs |
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| C06 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Wang Jiaxing Document name: Notification of Passing Examination on Formalities |
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| C53 | Correction of patent for invention or patent application | ||
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Address after: 523000, room five, building 508, Jinhai building, Dongcheng District Tong Road, Dongguan, Guangdong Applicant after: Wang Jiaxing Address before: Wushi Village Primary School in Dongguan city of Dongcheng District province Guangdong road 523000 Lane 1 No. 6 main mountain Applicant before: Wang Jiaxing |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20091118 |