CN101676201A - Technology for removing arsenic in polyphosphoric acid - Google Patents
Technology for removing arsenic in polyphosphoric acid Download PDFInfo
- Publication number
- CN101676201A CN101676201A CN200810157176A CN200810157176A CN101676201A CN 101676201 A CN101676201 A CN 101676201A CN 200810157176 A CN200810157176 A CN 200810157176A CN 200810157176 A CN200810157176 A CN 200810157176A CN 101676201 A CN101676201 A CN 101676201A
- Authority
- CN
- China
- Prior art keywords
- phosphoric acid
- polyphosphoric acid
- technology
- arsenic
- removing arsenic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a technology for removing arsenic in polyphosphoric acid, comprising the following steps: introducing hydrogen sulfide or sulfide (such as sodium sulfide, phosphorus pentasulfide and the like) into phosphoric acid solution; generating precipitate at a certain temperature; and obtaining low-arsenic phosphoric acid after filtering and separating. The low-arsenic phosphoric acid can satisfy the requirements of market and environment protection, is a key for expanding polyphosphoric acid application, and has wide market prospect.
Description
Technical field
The present invention relates to a kind of dearsenicating technology, particularly relate to a kind of dearsenicating technology of polyphosphoric acid.
Technical background
Thermal phosphoric acid is to produce various industry and agriculture basic material with the phosphorus goods, is one of important goods and materials of national economy.In recent years, along with energy shortage is on the rise, the price of thermal phosphoric acid also goes up thereupon, and therefore causing with it is that the phosphorus chemical product of raw material is lost the market competitiveness gradually.According to the continuous variation of the market requirement, traditional industrial phosphoric acid has been difficult to the adaptation to market variations demand, for giving full play to plant efficiency, makes to produce with demand to integrate with, and device product is constantly upgraded, the product innovation of exploitation high added value.Characteristics in conjunction with China's phosphate rock resource, polyphosphoric acid is as new basic material acid, compare with common thermal phosphoric acid and to have incomparable advantage, as: have superfusibility matter,, still can keep liquid even under much lower temperature, store, corrodibility is little, the transportation per unit weight freight charges to economize than common phosphoric acid, contract and phosphate composition to metal from having good huge legendary turtle cooperation usefulness, polyphosphoric acid also just progressively replaces ortho-phosphoric acid and is widely used for this reason.But most clients both at home and abroad usually to the requirement of arsenic content in the polyphosphoric acid than higher, particularly arsenic content is had in the product of particular requirement, the polyphosphoric acid that need have low arsenic content is used for metal finishing as industrialization phosphoric acid, dyestuff processing etc.
At present, the country that carries out the specialized research of polyphosphoric acid is not a lot, mainly contains states such as the U.S., Russia, Japan and Europe.Its research field has related to many aspects such as agricultural, light industry, oil, chemical industry, medicine, food, and the polyphosphoric acid of being produced is mainly used in makes high-purity commodity phosphoric acid and aspects such as phosphoric acid defluorination, chemical fertilizer, fodder additives, refractory materials, corrosion inhibitor and metal cleaning.With abroad compare, China's polyphosphoric acid production has following characteristics: the general technical level only is equivalent to the level at developed country late 1980s, the beginning of the nineties, and raw-material consumption and production cost generally are higher than abroad, scope of the enterprise is little, China has only ten enterprises of youngster family to carry out the production and selling polyphosphoric acid at present, and scale is all little.Mainly concentrate on some enterprises and Yunnan Province's chemical research in Jiangsu and Shanghai, the range of application of product is more single, and the low-level duplicate construction problem is serious.
Summary of the invention
The purpose of this invention is to provide a kind of technology for removing arsenic in polyphosphoric acid.
Technical scheme of the present invention is: with the dearsenic agent of preparation join in the reactor with phosphoric acid in the arsenus acid reaction, generate As
2S
3Precipitation will contain As then
2S
3Phosphoric acid be pumped in the degassing tower to outgas and (slough unnecessary H
2S gas), deliver in the strainer and filter, filtrate (phosphoric acid product) enters pan tank, filter residue (As
2S
3) entering the slag letter, tail gas washs up to standard after blower fan is discharged in the atmosphere through washing tower.
Embodiment
According to As energy S and the characteristic that generates insoluble compound, by in phosphoric acid solution, feeding hydrogen sulfide or adding sulfide (as sodium sulphite, thiophosphoric anhydride), make the generation precipitation at a certain temperature, obtain low-arsenic phosphorus acid by filtering separation then.The add-on of sulfide is decided according to arsenic content in the acid.
Industrial dearsenic agent with preparation join in the reactor with phosphoric acid in the arsenus acid reaction, generate As
2S
3Precipitation will contain As then
2S
3Phosphoric acid be pumped in the degassing tower to outgas and (slough unnecessary H
2S gas), deliver in the strainer and filter, filtrate (phosphoric acid product) enters pan tank, filter residue (As
2S
3) entering the slag letter, tail gas washs up to standard after blower fan is discharged in the atmosphere through washing tower.
When filtering, help filter owing to form the very tiny gac that can add in case of necessity of crystal of sulfide, reached effective separation.In China, the research of polyphosphoric acid is just at the early-stage with production, particularly also has very long distance with industrialization, large-scale application.Low arsenic polyphosphoric acid is the demand in market, also is environmental protection requirement simultaneously, widens the polyphosphoric acid key in application especially.Only make full use of, market outlook could be more wide.
Claims (4)
1, a kind of technology for removing arsenic in polyphosphoric acid is characterized in that: industrial phosphoric acid adds the dearsenic agent generation and contains As in reactor
2S
3Phosphoric acid.
2, a kind of technology for removing arsenic in polyphosphoric acid according to claim 1 is characterized in that: will contain As
2S
3Phosphoric acid pumping degassing tower outgases.
3, a kind of technology for removing arsenic in polyphosphoric acid according to claim 2 is characterized in that: the gas in the degassing tower is delivered in the strainer filtered.
4, a kind of technology for removing arsenic in polyphosphoric acid according to claim 3 is characterized in that: filtered liquid is entered pan tank, filter residue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810157176A CN101676201A (en) | 2008-09-19 | 2008-09-19 | Technology for removing arsenic in polyphosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810157176A CN101676201A (en) | 2008-09-19 | 2008-09-19 | Technology for removing arsenic in polyphosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101676201A true CN101676201A (en) | 2010-03-24 |
Family
ID=42028943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810157176A Pending CN101676201A (en) | 2008-09-19 | 2008-09-19 | Technology for removing arsenic in polyphosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101676201A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070664A (en) * | 2011-01-04 | 2011-05-25 | 山东省泰和水处理有限公司 | Arsenic removal process for amino trimethylene phosphonic acid |
| CN102070665A (en) * | 2011-01-04 | 2011-05-25 | 山东省泰和水处理有限公司 | Process for arsenic removal of 1-hydroxy ethylidene-1,1-diphosphonic acid |
| CN102093415A (en) * | 2011-01-04 | 2011-06-15 | 山东省泰和水处理有限公司 | Process for removing arsenic from diethylene triamine penta(methylene phosphonic acid) (DTPMPA) |
| CN102431982A (en) * | 2011-09-26 | 2012-05-02 | 瓮福（集团）有限责任公司 | Arsenic removing method of phosphoric acid |
| CN102515125A (en) * | 2011-12-31 | 2012-06-27 | 云南省化工研究院 | Arsenic-removing filtering method for high-concentration polyphosphoric acid |
| CN103011111A (en) * | 2012-12-27 | 2013-04-03 | 广西明利化工有限公司 | Continuous arsenic removal reaction method |
| CN104843660A (en) * | 2015-06-05 | 2015-08-19 | 连云港市德邦精细化工有限公司 | Method for preparing sodium dihydrogen phosphate by using phosphoric acid by furnace process |
-
2008
- 2008-09-19 CN CN200810157176A patent/CN101676201A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070664A (en) * | 2011-01-04 | 2011-05-25 | 山东省泰和水处理有限公司 | Arsenic removal process for amino trimethylene phosphonic acid |
| CN102070665A (en) * | 2011-01-04 | 2011-05-25 | 山东省泰和水处理有限公司 | Process for arsenic removal of 1-hydroxy ethylidene-1,1-diphosphonic acid |
| CN102093415A (en) * | 2011-01-04 | 2011-06-15 | 山东省泰和水处理有限公司 | Process for removing arsenic from diethylene triamine penta(methylene phosphonic acid) (DTPMPA) |
| CN102431982A (en) * | 2011-09-26 | 2012-05-02 | 瓮福（集团）有限责任公司 | Arsenic removing method of phosphoric acid |
| CN102515125A (en) * | 2011-12-31 | 2012-06-27 | 云南省化工研究院 | Arsenic-removing filtering method for high-concentration polyphosphoric acid |
| CN102515125B (en) * | 2011-12-31 | 2014-07-30 | 云南省化工研究院 | Arsenic-removing filtering method for high-concentration polyphosphoric acid |
| CN103011111A (en) * | 2012-12-27 | 2013-04-03 | 广西明利化工有限公司 | Continuous arsenic removal reaction method |
| CN103011111B (en) * | 2012-12-27 | 2015-07-15 | 广西明利化工有限公司 | Continuous arsenic removal reaction method |
| CN104843660A (en) * | 2015-06-05 | 2015-08-19 | 连云港市德邦精细化工有限公司 | Method for preparing sodium dihydrogen phosphate by using phosphoric acid by furnace process |
| CN104843660B (en) * | 2015-06-05 | 2017-08-04 | 连云港市德邦精细化工有限公司 | A kind of preparation method of sodium dihydrogen phosphate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101676201A (en) | Technology for removing arsenic in polyphosphoric acid | |
| CN103787293A (en) | Method for preparing sodium dihydrogen phosphate by utilizing phosphoric acid by wet process | |
| CN102553641B (en) | Preparation method for nitrogen-containing activated carbon catalyst | |
| CN101891530B (en) | Activated calcium magnesium phosphate fertilizer and preparation method thereof | |
| CN105061116A (en) | Liquid humic acid water-soluble fertilizer production method | |
| CN102766158A (en) | Production technology of amino trimethylene phosphonic acid (ATMP) | |
| CN102701290A (en) | Method for preparing blocky ferric trichloride | |
| CN103848407A (en) | Monoammonium phosphate production method | |
| CN102898245A (en) | Seaweed synergia compound fertilizer and preparation method thereof | |
| CN108424206B (en) | Method for preparing silicon-containing compound fertilizer by using fly ash acid method aluminum extraction residues, silicon-containing compound fertilizer and fly ash utilization method | |
| CN103805152A (en) | Scale and corrosion inhibitor for oilfield water injection and preparation method thereof | |
| CN102838097A (en) | Method for removing magnesium oxide in phosphate concentrate through phosphatic fertilizer and phosphorus chemical industry acid wastewater | |
| CN104177766B (en) | A kind of Graphene furane resins composite and preparation method thereof | |
| CN102534192A (en) | Method for producing manganous oxide ore powder by reducing low-grade manganese oxide ore by using biomass gas | |
| CN104231279A (en) | Method of extracting humic acid from peat | |
| CN1663986A (en) | Technology for producing yellow humic acid by using coal | |
| CN102515134A (en) | Production technology of food-grade phosphoric acid with hydrochloric acid method | |
| CN102295279A (en) | Dearsenication technology for polyphosphoric acid | |
| CN106282571B (en) | A kind of comprehensive recycling process of tin copper gold and silver waste material | |
| CN108046226B (en) | Production method for co-production of industrial-grade ammonium dihydrogen phosphate and water-soluble fertilizer | |
| CN103274857A (en) | Humic acid synergistic ammonium bicarbonate fertilizer and production method thereof | |
| CN105349778A (en) | Clean production method for recycling yellow phosphorus, iron oxide red and precious metal from ferrophosphorus | |
| CN101898974B (en) | Method for producing ethylene glycol-bis (2-aminoethyl ether) tetraacetic acid (EGTA) | |
| CN101386910A (en) | Copper extractive agent | |
| CN103979498B (en) | A kind of method of high efficiente callback iodine in production process of phosphoric acid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100324 |