CN103539148B - Potassium felspar sand is utilized to produce the method for molecular sieve - Google Patents

Potassium felspar sand is utilized to produce the method for molecular sieve Download PDF

Info

Publication number
CN103539148B
CN103539148B CN201310526955.6A CN201310526955A CN103539148B CN 103539148 B CN103539148 B CN 103539148B CN 201310526955 A CN201310526955 A CN 201310526955A CN 103539148 B CN103539148 B CN 103539148B
Authority
CN
China
Prior art keywords
molecular sieve
solution
felspar sand
potassium felspar
sio
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.)
Active
Application number
CN201310526955.6A
Other languages
Chinese (zh)
Other versions
CN103539148A (en
Inventor
张光旭
石瑞
彭宇
任晓聪
张鲁鲁
崔文青
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LUOYANG FLUORIDE & POTASSIUM TECHNOLOGY Co Ltd
Original Assignee
LUOYANG FLUORIDE & POTASSIUM TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by LUOYANG FLUORIDE & POTASSIUM TECHNOLOGY Co Ltd filed Critical LUOYANG FLUORIDE & POTASSIUM TECHNOLOGY Co Ltd
Priority to CN201310526955.6A priority Critical patent/CN103539148B/en
Publication of CN103539148A publication Critical patent/CN103539148A/en
Application granted granted Critical
Publication of CN103539148B publication Critical patent/CN103539148B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a kind of method utilizing potassium felspar sand to produce molecular sieve, it utilizes potassium felspar sand and NH 4the SiF of F low-temperature decomposition gained 4gas, changes into Na in NaOH solution 2siO 3and NaF; Solid slag simultaneously after potassium feldspar decomposition obtains containing K through leaching +, Al 3+, SO 4 2-leaching liquid, leaching liquid leads to ammonia can obtain Al (OH) 3precipitation and agricultural composite fertilizer ammonium-potassium sulfate.With NaOH process Al (OH) 3naAlO can be obtained 2, NaAlO 2with Na 2siO 3synthesis of molecular sieve under hydrothermal conditions.The present invention produces molecular sieve, and sial when crystal formation is adjustable, and coproduction Agricultural Fertilizer ammonium-potassium sulfate and industrial goods Sodium Fluoride, realize the comprehensive utilization to K-feldspar K, Al, Si tri-kinds of elements, remarkable in economical benefits.

Description

Potassium felspar sand is utilized to produce the method for molecular sieve
Technical field
The present invention relates to a kind of method producing molecular sieve, specifically, relate in a kind of industrial production and utilize potassium felspar sand to produce the method for molecular sieve.
Background technology
Molecular sieve, also known as zeolite, being a kind of aluminosilicate of crystal type, because limiting by natural resource, nearly all adopting synthetic now.The silicon source that synthesis of molecular sieve is used and aluminium source decide the quality of technique, product performance and economy.Potassium felspar sand provides silicon, aluminium two spike-type cultivars simultaneously, and molecular sieve produced by exploitation potassium felspar sand is obviously good selection.Have a kind of method utilizing alkaline residue and potassium felspar sand molecular sieve in prior art, because multiplex fertilizer obtains, technological process is difficult to hold, and product performance are not high; Also have a kind of technology to be improve the former, adopt soda ash or caustic soda, but still be faced with the problem of the high and constant product quality difference of technology difficulty.If directly adopt purer industrial raw material to carry out large-scale molecular sieve production, obvious economy is bad.
In order to solve above Problems existing, people are seeking a kind of desirable technical solution always.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, thus provide a kind of design science, the sial potassium felspar sand that utilizes that when crystal formation is adjustable, element utilization ratio is high, good in economic efficiency to produce the method for molecular sieve.
To achieve these goals, the technical solution adopted in the present invention is: a kind of method utilizing potassium felspar sand to produce molecular sieve, and preparation process comprises the following steps:
Step 1: potassium felspar sand and NH 4f reaction generates SiF 4gas and containing Al 3+, K +and F -residue;
Step 2: what generate in step 1 contains Al 3+, K +and F -residue in add Fluorspar Powder and H 2sO 4, after mixing, reaction generates SiF 4gas and containing Al 3+, K +, SO 4 2-and CaSO 4residue;
Step 3: by the SiF generated in step 1-2 4gas passes in NaOH solution, obtains the Na containing NaF crystal 2siO 3solution;
Step 4: the resultant in step 3 is purified, from Na 2siO 3in solution, NaF crystal separation is gone out;
Step 5: contain Al by what generate in step 2 3+, K +, SO 4 2-and CaSO 4residue pulverize after leach in the hot water, then press filtration obtains containing K +, Al 3+, SO 4 2-leaching liquid;
Step 6: add ammoniacal liquor in leaching liquid described in step 5, reaction generates ammonium-potassium sulfate solution and Al (OH) 3precipitation;
Step 7: by the Al (OH) filtered out 3join in NaOH solution, reaction generates NaAlO 2solution, and to this NaAlO 2solution carries out filtration and purifies;
Step 8: by the Na after purification in step 4 2siO 3naAlO after purifying in solution and step 7 2solution mixes in water, through being obtained by reacting molecular sieve work in-process, described molecular sieve work in-process are washed successively, press filtration, drying, obtain molecular sieve finished product.
Based on above-mentioned, the reaction in described step 8 comprises aging and crystallization, and aging temperature is 70 DEG C-80 DEG C, and digestion time is 1-4 hour; Crystallization temperature is 93 DEG C-97 DEG C, and crystallization time is 3-4 hour; In described step 8, the silica alumina ratio of two kinds of reactants is 2:1.
Based on above-mentioned, the purification in described step 4 is comprised the centrifugation and condensing crystal successively carried out.
Based on above-mentioned, described centrifugation is from Na 2siO 3in solution, NaF crystal separation is gone out a part, then isolated NaF crystal is washed, dry, obtain NaF finished product.
Based on above-mentioned, described condensing crystal is from the Na after described centrifugation 2siO 3isolate NaF crystal in solution, then this NaF crystal is rejoined in the resultant of described step 3, again participate in described step 4; Through the Na of described condensing crystal 2siO 3solution is for participating in the reaction of described step 8.
Based on above-mentioned, also comprise ammonia in the resultant in described step 1, ammonia cold water carries out absorption and forms ammoniacal liquor, and this ammoniacal liquor is for participating in the reaction of step 6.
Based on above-mentioned, in described step 1, potassium felspar sand and NH 4the mass ratio of F is 1:(0.4-0.6), temperature of reaction is 300 DEG C-320 DEG C, 0.5 hour-2 hours reaction times.
Based on above-mentioned, in described step 2, containing Al 3+, K +, F -residue and the mass ratio of Fluorspar Powder and sulfuric acid be 1:(0.4-0.5): (0.7-1), temperature of reaction is 350 DEG C-390 DEG C, 0.5 hour-2 hours reaction times.
Based on above-mentioned, in described step 5, hot water with containing Al 3+, K +, SO 4 2-and CaSO 4the ratio of mass of residue be (3-5): 1, temperature is 85 DEG C-95 DEG C, leaching time 1-3 hour.
Hinge structure of the present invention has outstanding substantive distinguishing features and significant progress, and specifically, the present invention utilizes potassium felspar sand and NH 4the SiF of F low-temperature decomposition gained 4gas, changes into Na in NaOH solution 2siO 3and NaF; Solid slag simultaneously after potassium feldspar decomposition obtains containing K through leaching +, Al 3+, SO 4 2-leaching liquid, leaching liquid leads to ammonia can obtain Al (OH) 3precipitation and agricultural composite fertilizer ammonium-potassium sulfate.With NaOH process Al (OH) 3naAlO can be obtained 2, NaAlO 2with Na 2siO 3synthesis of molecular sieve under hydrothermal conditions.By control Na 2siO 3solution and NaAlO 2the proportioning of solution, realizes the adjustable of sial when crystal formation, to meet different customer demand, and by-product Agricultural Fertilizer ammonium-potassium sulfate and industrial goods Sodium Fluoride, realize the comprehensive utilization to K-feldspar K, Al, Si tri-kinds of elements, remarkable in economical benefits.This method utilizing potassium felspar sand to produce molecular sieve has design science, the sial advantage that when crystal formation is adjustable, element utilization ratio is high, good in economic efficiency.
Accompanying drawing explanation
Fig. 1 is preparation flow schematic diagram of the present invention.
Embodiment
Below by embodiment, technical scheme of the present invention is described in further detail.
embodiment 1
As shown in Figure 1, a kind of method utilizing potassium felspar sand to produce molecular sieve, preparation process comprises the following steps:
Step 1: after converter temperature reaches 350 DEG C, proportionally by potassium felspar sand 60Kg and NH 4f(30-40) Kg mixes, and adds in converter feed bin in batches, opens batch mixing spiral, star-like blanking device charging successively, feldspar in powder and NH 4f reacts and generates SiF in converter 4gas and containing Al 3+, K +and F -residue.Wherein, potassium felspar sand and NH before reaction 4the mass ratio of F is 1:(0.4-0.6), temperature of reaction is 300 DEG C-320 DEG C, 0.5 hour-2 hours reaction times.After reacting half an hour, open discharging spiral, reacted material slag is discharged by stove tail.
Step 2: after converter temperature reaches 370 DEG C, add Fluorspar Powder, Fluorspar Powder opens sulfuric acid charging ball valve after adding two minutes, start sulfuric acid volume pump, according to 48Kg/h:(40-50) ratio of Kg/h adds H 2sO 4react.Containing Al 3+, K +, F -residue mix with Fluorspar Powder and sulfuric acid after react and generate SiF 4gas and containing Al 3+, K +, SO 4 2-and CaSO 4residue; Containing Al 3+, K +, F -residue and the mass ratio of Fluorspar Powder and sulfuric acid be 1:(0.4-0.5): (0.7-1), temperature of reaction is 350 DEG C-390 DEG C, 0.5 hour-2 hours reaction times.
Step 3: by the SiF generated in step 1-2 4gas passes in the NaOH solution of 1000 liters of 2mol/L, obtains the Na containing NaF crystal 2siO 3solution; The NH generated in step 1-2 3absorb with water.
Step 4: the resultant in step 3 is purified, from Na 2siO 3in solution, NaF crystal separation is gone out.NaF crystal finished product is important industrial goods raw material, improves the economic benefit that potassium feldspar decomposition produces.
Step 5: contain Al by what generate in step 2 3+, K +, SO 4 2-and CaSO 4residue pulverizer pulverize after leach in the hot water, in plate-and-frame filter press, then carry out press filtration obtain containing K +, Al 3+, SO 4 2-leaching liquid; Hot water with containing Al 3+, K +, SO 4 2-and CaSO 4the ratio of mass of residue be (3-5): 1, temperature is 85 DEG C-95 DEG C, leaching time 1-3 hour, then naturally cooling.
Step 6: open and stir, add ammoniacal liquor in leaching liquid described in 1000L in step 5, reaction generates ammonium-potassium sulfate solution and Al (OH) 3precipitation; Equal 8 to pH, filter and obtain 25Kg Al (OH) 3precipitation.Institute adds ammonia and Al 3+mol ratio be 3.5:1.Ammonium-potassium sulfate, as by product, is important Agricultural Fertilizer raw material, significantly improves the economic benefit that potassium feldspar decomposition produces.
Step 7: by Al (OH) 3join in NaOH solution, reaction generates NaAlO 2solution.NaOH and Al (OH) 3mol ratio be 1.2:1.According to Na 2o/Al 2o 3ratio-dependent NaOH, Al (OH) of=1.34 3, H 2the consumption of O, the concentration of NaOH is 30%(massfraction).Al (OH) is added in the NaOH solution of heating 3, 115 DEG C of continuous stirrings make it fully react, and obtain NaAlO 2solution, chemical examination sodium aluminate content and to this NaAlO 2solution carries out filtration and purifies.
Step 8: by the Na after purification in water, mother liquor, step 4 2siO 3naAlO after purifying in solution and step 7 2solution joins in crystallizing kettle successively, adds 10 grams of crystal seeds, if produce 13X type molecular sieve, needs to be warming up to 80 DEG C, aging 1 hour, then continues to be warmed up to 95 DEG C, crystallization 4 hours; If produce 4A type molecular sieve, aging temperature is needed to be 70 degree, digestion time 4 hours, crystallization temperature 95 degree, 4 hours time.After open kettle cover naturally cooling, obtain molecular sieve work in-process, described molecular sieve work in-process washed successively, press filtration, drying, obtain molecular sieve finished product.Initial wash equipment is belt filter press, degree of depth washing plate-and-frame filter press, and drying plant is cyclone drying machine.In this step 8, the silica alumina ratio of two kinds of reactants is 2:1.
Silica alumina ratio in molecular sieve and crystal formation can be different according to different customer demand, and natural mineral composition has been fixed, and cannot complete this adjustment, so by the step 8 in the present invention, and can control Na 2siO 3solution and NaAlO 2the proportioning of solution, realizes the sial object that when crystal formation is adjustable with this.Adjustment Na 2o, Al 2o 3, SiO 2, H 2the ratio of O can obtain dissimilar product.
embodiment 2
Embodiment 2 is with the difference of embodiment 1: the purification in described step 4 comprises the centrifugation and condensing crystal successively carried out.
Described centrifugation is from Na in tripod pendulum type batch centrifugal 2siO 3in solution, NaF crystal separation is gone out a part, then isolated NaF crystal is washed, dry, obtain NaF crystal finished product.NaF crystal finished product is important industrial goods raw material, improves the economic benefit that potassium feldspar decomposition produces.
Described condensing crystal be vacuum tightness be-0.08Mpa, temperature is in the crystallization kettle of 70 DEG C, from the Na after described centrifugation 2siO 3isolate NaF crystal crude product in solution, because the NaF crystal crude product through condensing crystal is pure not as centrifugalled NaF crystal finished product, so rejoin in the resultant of described step 3 by this NaF crystal crude product, again participate in described step 4; Through the Na of described condensing crystal 2siO 3solution is for participating in the reaction of described step 8.
embodiment 3
Embodiment 3 is with the difference of embodiment 2: also comprise ammonia in the resultant in described step 1, and ammonia cold water carries out absorption and forms ammoniacal liquor, and this ammoniacal liquor is for participating in the reaction of step 6.After centrifugation washed NaF crystal water in containing NaF, may be used for preparing NaOH solution, this NaOH solution can be used for the reaction participating in step 3 and step 7.As can be seen from above 2, waste gas and waste water are recycled by the present invention, participate in production process, improve the utilization ratio of product in potassium feldspar decomposition technique while energy-saving and emission-reduction.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope of request of the present invention protection.

Claims (9)

1. utilize potassium felspar sand to produce a method for molecular sieve, it is characterized in that: preparation process comprises the following steps:
Step 1: potassium felspar sand and NH 4f reaction generates SiF 4gas and containing Al 3+, K +and F -residue;
Step 2: what generate in step 1 contains Al 3+, K +and F -residue in add Fluorspar Powder and H 2sO 4, after mixing, reaction generates SiF 4gas and containing Al 3+, K +, SO 4 2-and CaSO 4residue;
Step 3: by the SiF generated in step 1-2 4gas passes in NaOH solution, obtains the Na containing NaF crystal 2siO 3solution;
Step 4: the resultant in step 3 is purified, from Na 2siO 3in solution, NaF crystal separation is gone out;
Step 5: contain Al by what generate in step 2 3+, K +, SO 4 2-and CaSO 4residue pulverize after leach in the hot water, then press filtration obtains containing K +, Al 3+, SO 4 2-leaching liquid;
Step 6: add ammoniacal liquor in leaching liquid described in step 5, reaction generates ammonium-potassium sulfate solution and Al (OH) 3precipitation;
Step 7: by the Al (OH) filtered out 3join in NaOH solution, reaction generates NaAlO 2solution, and to this NaAlO 2solution carries out filtration and purifies;
Step 8: by the Na after purification in step 4 2siO 3naAlO after purifying in solution and step 7 2solution mixes in water, through being obtained by reacting molecular sieve work in-process, described molecular sieve work in-process are washed successively, press filtration, drying, obtain molecular sieve finished product.
2. the method utilizing potassium felspar sand to produce molecular sieve according to claim 1, is characterized in that: the reaction in described step 8 comprises aging and crystallization, and aging temperature is 70 DEG C-80 DEG C, and digestion time is 1-4 hour; Crystallization temperature is 93 DEG C-97 DEG C, and crystallization time is 3-4 hour; In described step 8, the silica alumina ratio of two kinds of reactants is 2:1.
3. the method utilizing potassium felspar sand to produce molecular sieve according to claim 1 and 2, is characterized in that: the purification in described step 4 is comprised the centrifugation and condensing crystal successively carried out.
4. the method utilizing potassium felspar sand to produce molecular sieve according to claim 3, is characterized in that: described centrifugation is from Na 2siO 3in solution, NaF crystal separation is gone out a part, then isolated NaF crystal is washed, dry, obtain NaF finished product.
5. the method utilizing potassium felspar sand to produce molecular sieve according to claim 4, is characterized in that: described condensing crystal is from the Na after described centrifugation 2siO 3isolate NaF crystal in solution, then this NaF crystal is rejoined in the resultant of described step 3, again participate in described step 4; Through the Na of described condensing crystal 2siO 3solution is for participating in the reaction of described step 8.
6. the method utilizing potassium felspar sand to produce molecular sieve according to claim 1, is characterized in that: also comprise ammonia in the resultant in described step 1, and ammonia cold water carries out absorption and forms ammoniacal liquor, and this ammoniacal liquor is for participating in the reaction of step 6.
7. the method utilizing potassium felspar sand to produce molecular sieve according to claim 1, is characterized in that: in described step 1, potassium felspar sand and NH 4the mass ratio of F is 1:(0.4-0.6), temperature of reaction is 300 DEG C-320 DEG C, 0.5 hour-2 hours reaction times.
8. the method utilizing potassium felspar sand to produce molecular sieve according to claim 1, is characterized in that: in described step 2, containing Al 3+, K +, F -residue and the mass ratio of Fluorspar Powder and sulfuric acid be 1:(0.4-0.5): (0.7-1), temperature of reaction is 350 DEG C-390 DEG C, 0.5 hour-2 hours reaction times.
9. the method utilizing potassium felspar sand to produce molecular sieve according to claim 1, is characterized in that: in described step 5, hot water with containing Al 3+, K +, SO 4 2-and CaSO 4the ratio of mass of residue be (3-5): 1, temperature is 85 DEG C-95 DEG C, leaching time 1-3 hour.
CN201310526955.6A 2013-10-31 2013-10-31 Potassium felspar sand is utilized to produce the method for molecular sieve Active CN103539148B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310526955.6A CN103539148B (en) 2013-10-31 2013-10-31 Potassium felspar sand is utilized to produce the method for molecular sieve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310526955.6A CN103539148B (en) 2013-10-31 2013-10-31 Potassium felspar sand is utilized to produce the method for molecular sieve

Publications (2)

Publication Number Publication Date
CN103539148A CN103539148A (en) 2014-01-29
CN103539148B true CN103539148B (en) 2015-08-19

Family

ID=49963070

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310526955.6A Active CN103539148B (en) 2013-10-31 2013-10-31 Potassium felspar sand is utilized to produce the method for molecular sieve

Country Status (1)

Country Link
CN (1) CN103539148B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106365189B (en) * 2016-08-29 2017-09-22 昆明理工大学 A kind of method of comprehensive utilization of white residue soil
CN109261349B (en) * 2018-08-31 2020-05-19 贺州市骏鑫矿产品有限责任公司 Method for purifying and whitening albite
CN112320820A (en) * 2020-10-27 2021-02-05 贵州省化工研究院 Method for producing high-purity sodium fluoride by utilizing fluosilicic acid in phosphoric acid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6451282B1 (en) * 1997-10-28 2002-09-17 SIKLOSI PéTER Process for production of zeolites from raw materials containing alkali alumino hydro-silicates
CN1765837A (en) * 2005-09-12 2006-05-03 鄂州市长润农业生态技术有限公司 Potash feldspar wet method decomposition and production process
CN102230081A (en) * 2011-04-23 2011-11-02 大悟华龙吕王石材有限公司 Acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar
CN103172074A (en) * 2013-01-17 2013-06-26 洛阳氟钾科技有限公司 Process for decomposing potassium feldspar by adopting low-temperature semidry method for comprehensive utilization

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6451282B1 (en) * 1997-10-28 2002-09-17 SIKLOSI PéTER Process for production of zeolites from raw materials containing alkali alumino hydro-silicates
CN1765837A (en) * 2005-09-12 2006-05-03 鄂州市长润农业生态技术有限公司 Potash feldspar wet method decomposition and production process
CN102230081A (en) * 2011-04-23 2011-11-02 大悟华龙吕王石材有限公司 Acid leaching method for extracting potassium, aluminum and silicon elements from potassium feldspar
CN103172074A (en) * 2013-01-17 2013-06-26 洛阳氟钾科技有限公司 Process for decomposing potassium feldspar by adopting low-temperature semidry method for comprehensive utilization

Also Published As

Publication number Publication date
CN103539148A (en) 2014-01-29

Similar Documents

Publication Publication Date Title
CN104817110B (en) A kind of zircon sand fluidizing chlorination method produces high-purity zirconium oxychloride and the method for coproduction Silicon chloride.
CN102001686B (en) Process for producing potassium fluoride and white carbon black by decomposing potassium feldspar with fluorine-containing acid at low temperature
CN101269816A (en) Method for producing fluorine series compounds and white carbon black
CN102992343A (en) Method for synthesizing zeolite molecular sieve via solid phase method without organic template
CN101857213B (en) Method for preparing food-grade diammonium phosphate from wet-process phosphoric acid
CN102965721A (en) Method for preparing calcium sulfate crystal whisker in low cost
CN103539148B (en) Potassium felspar sand is utilized to produce the method for molecular sieve
CN101423225A (en) Method for preparing silica zeolite Silicalite-2
CN103058853B (en) A kind of production method of calcium hydrogen citrate
CN108383094A (en) The method for preparing calcium monohydrogen phosphate and ammonium chloride using reverse flotation phosphorus tailing
CN103553067B (en) The method of full potassium W type molecular sieve produced by a kind of KOH alkali fusion activation potassium felspar sand
CN101838006B (en) Novel method for separating strontium carbonate waste slag acid leaching slurry
CN102001688B (en) Process for producing potassium sulfate by decomposing potassium feldspar at low temperature with fluorine-containing acid
CN101462732B (en) Method for preparing sodium silicate from fluorine-containing silica gel
CN102923716A (en) Process for producing trichlorosilane through inverse disporportionation of dichlorosilane
CN103193253B (en) Pressurized acid-leaching potassium extracting technology for potassium feldspar
CN107601520B (en) Preparation method of ETS-10 molecular sieve
CN101462739A (en) Method for preparing 4A zeolite molecular sieve from red desmine
CN104030315B (en) A kind of method utilizing natural ore soil to synthesize heteroatoms aluminium phosphate molecular sieve
CN105197957A (en) Synthetic method of zeolite 4A
CN1072197C (en) Wetting decomposition process of potash feldspar ore
CN103112875B (en) Process for preparing agricultural potassium nitrate by utilizing potassium-enriched rock
CN205874265U (en) Preparation facilities of biruea
CN102001691A (en) Process for producing potassium nitrate by decomposing potassium feldspar at low temperature through fluorine-contained acid
CN102923681B (en) Method for directly preparing industrial monopotassium phosphate through low-grade phosphate ores by hydrochloric acid process

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
C53 Correction of patent of invention or patent application
CB02 Change of applicant information

Address after: 471400, Luoyang, Henan, Songxian province township industrial agglomeration area Luoyang potassium fluoride technology joint-stock company

Applicant after: LUOYANG POTASSIUM FLUORIDE TECHNOLOGY CO.,LTD.

Address before: 471400, Luoyang, Henan Province, Songxian Province, Po township industrial agglomeration, Luoyang fluoride, potassium Polytron Technologies Inc

Applicant before: Luoyang Fluorine and Potassium Technology Co.,Ltd.

Address after: 471400, Luoyang, Henan Province, Songxian Province, Po township industrial agglomeration, Luoyang fluoride, potassium Polytron Technologies Inc

Applicant after: Luoyang Fluorine and Potassium Technology Co.,Ltd.

Address before: 471400, Luoyang, Songxian, Henan province Township Po Industrial Agglomeration Area Luoyang fluorine potassium Technology Co., Ltd.

Applicant before: Luoyang Fluoride & Potassium Technology Co.,Ltd.

COR Change of bibliographic data

Free format text: CORRECT: APPLICANT; FROM: LUOYANG FLUORIDE + POTASSIUM TECHNOLOGY CO., LTD. TO: LUOYANG FLUORIDE + POTASSIUM TECHNOLOGY COMPANY

Free format text: CORRECT: APPLICANT; FROM: LUOYANG FLUORIDE + POTASSIUM TECHNOLOGY LTD. TO: LUOYANG FLUORIDE + POTASSIUM TECHNOLOGY CO., LTD.

C14 Grant of patent or utility model
GR01 Patent grant