CN105948069A - Preparation method of activated clay loaded sodium hydroxide - Google Patents
Preparation method of activated clay loaded sodium hydroxide Download PDFInfo
- Publication number
- CN105948069A CN105948069A CN201610260163.2A CN201610260163A CN105948069A CN 105948069 A CN105948069 A CN 105948069A CN 201610260163 A CN201610260163 A CN 201610260163A CN 105948069 A CN105948069 A CN 105948069A
- Authority
- CN
- China
- Prior art keywords
- filter cake
- prepares
- preparation
- active hargil
- stirring
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/36—Silicates having base-exchange properties but not having molecular sieve properties
- C01B33/38—Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type
- C01B33/40—Clays
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a preparation method of an activated clay loaded sodium hydroxide, and belongs to the technical field of bentonite deep processing. The activated clay loaded sodium hydroxide is prepared by the steps such as preparation of material, slurrying, acid activation reaction, filter pressing, alkalization, drying, and crushing. The alkali capacity of the activated clay loaded sodium hydroxide prepared by the invention is 19-19.4mmol/g, and the quality is stable. The added reducing agent in the invention can reduce the Fe<3+> generated by an acid corrosion device to the Fe<2+> having light color, and the influence on the whiteness of the activated clay caused by the color of Fe<3+> is avoided.
Description
[technical field]
The invention belongs to bentonite deep process technology field, be specifically related to a kind of load hydrogen sodium oxide active hargil
Preparation method.
[background technology]
Bentonite is referred to as natural nano-material, general-purpose clay.China's bentonite is best in quality, and ore reserves occupies the world
Second, in addition to exporting as bentonite raw material on a small quantity, remaining is all with bentonite in powder and active hargil shape
Formula marketing is domestic, and these products belong to primary product, and economic benefit is the highest, and level of resource utilization is low.In order to obtain
Bigger economic benefit, needs to develop the seriation new product of high-tech content, expansive approach frontier.
Load hydrogen sodium oxide active hargil is with bentonite as raw material, acidified after form active hargil, at this base
Re-boostering test on plinth and obtain, it is a kind of lamellar mineral materials, has special anion-exchange capacity.It is permissible
It is directly used in the purification of the deacidification of the food liquid such as fruit juice, vegetable oil, decolouring and drainage, air and water quality, urges
The preparation etc. of agent, it is also possible to the nano material that organic acid reaction prepares NEW TYPE OF COMPOSITE stratiform, for coating,
The field such as plastics and novel absorption material.But the prior art of industrialized production load hydrogen sodium oxide active hargil
In to there is the quality of production, efficiency low and unstable, the cycle is long, high in cost of production problem, therefore, how to improve
Load hydrogen sodium oxide activated clay production quality, stability, efficiency, reduce cost, become bentonite and deeply add
One important directions of work research.
Patent Application Publication " preparation method of a kind of loaded calcium hydroxide activity carclazyte (application number:
201510081886.1) preparation method of a kind of loaded calcium hydroxide activity carclazyte, described load " are disclosed
Calcium hydroxide activity carclazyte is through dispensing slurrying, acid activation reaction, filter pressing for the first time, washing and second time pressure
Prepared by the steps such as filter, alkalization, filter pressing for the third time, dry, pulverizing, the load hydrogen-oxygen that the method is produced
Change calcium active hargil and there is the shortcomings such as whiteness is the highest, alkali capacity is low, quality is unstable.
[summary of the invention]
The technical problem to be solved in the present invention is to provide the preparation method of a kind of load hydrogen sodium oxide active hargil, with
Solve load hydrogen sodium oxide active hargil in prior art and have that whiteness is the highest, alkali capacity is low, quality is unstable
Problem.Load hydrogen sodium oxide active hargil steady quality, alkali capacity prepared by the present invention are high.
For solve above technical problem, the present invention by the following technical solutions:
The preparation method of a kind of load hydrogen sodium oxide active hargil, comprises the following steps:
S1: by bentonite and active hargil waste water that concentration is 13%-16% by weight for 1.6-2.2:10-14
Mixing, stirs under the conditions of rotating speed is 200-500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%-20%,
Described inorganic mixed acid is the sulphuric acid of concentration 16-18wt%, the carbonic acid of concentration 32-36wt%, concentration 18-20wt%
The mixed acid of oxalic acid 2-6:3-5:2-3 by volume composition, the weight ratio of pasty material A and inorganic mixed acid
For 1-3.2:4-16, under the conditions of rotating speed is 200-550r/min, add ammonium sulfide stirring, ammonium sulfide and slurry
The weight ratio of material A is 1-2:50-150, is heated to 82-93 DEG C, reacts 1.2-3.2h under the conditions of being maintained at 82-93 DEG C,
Prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out filter pressing under the conditions of pressure is 0.9-0.95MPa,
Prepared moisture content is the filter cake A of 32%-45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is the 6-7.5 of filter cake A weight
Times, stirring and dissolving filter cake A adds flocculant stirring 0.4-1.2h after completing makes solution precipitate, by precipitate in pressure
Power is to carry out filter pressing under the conditions of 0.9-0.95MPa, and prepared moisture content is the filter cake B of 32%-45%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is the 5-6.5 of filter cake B weight
Times, after stirring and dissolving filter cake B completes, add sodium hydroxide solution, prepare slurry material C；
S6: the slurry material C that step S5 prepares is carried out filter pressing under the conditions of pressure is 0.9-0.95MPa, system
Obtain the filter cake C that moisture content is 32%-45%；
S7: the filter cake C that step S6 prepares is placed in centrifuge and removes water to powder after filter cake C moisture content≤5%
Broken, gained ground product sieves, and prepares load hydrogen sodium oxide active hargil.
Further, the one during flocculant described in step S4 includes organic flocculant and inorganic flocculating agent.
Further, during described organic flocculant includes sodium polyacrylate, calcium polyacrylate (CPA), acrylamide
Kind.
Further, one or more during described inorganic flocculating agent includes bodied ferric sulfate, polyaluminium sulfate.
Further, concentration of sodium hydroxide solution described in step S5 is 8%-12%.
Further, the rotating speed of centrifuge described in step S7 is 3500-6000r/min.
Further, described in step S7, the mesh number of sieve is 300-600 mesh.
The method have the advantages that
(1) present invention adds the Fe that acid corrosion equipment can be produced by reducing agent3+It is reduced to the Fe of light color2+,
Avoid Fe3+The whiteness of the Color influences active hargil brought；
(2) the load hydrogen sodium oxide activated clay production efficiency of the present invention is high, energy consumption and low cost；
(3) the load hydrogen sodium oxide active hargil alkali capacity that the present invention produces is 19-19.4mmol/g, and whiteness is high
And it is stable；
(4) present invention uses centrifuging to remove water, and efficiency is high so that whole production technology cycle time；
(5) the recyclable recycling of gained spent acid of the present invention, effectively reduces acid and processes the cost of sewage, favorably
In energy-saving and emission-reduction.
[detailed description of the invention]
For ease of being more fully understood that the present invention, being illustrated by following example, these embodiments belong to this
Bright protection domain, but it is not intended to protection scope of the present invention.
The preparation method of a kind of load hydrogen sodium oxide active hargil, comprises the following steps:
S1: by bentonite and active hargil waste water that concentration is 13%-16% by weight for 1.6-2.2:10-14
Mixing, stirs under the conditions of rotating speed is 200-500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%-20%,
Described inorganic mixed acid is the sulphuric acid of concentration 16-18wt%, the carbonic acid of concentration 32-36wt%, concentration 18-20wt%
The mixed acid of oxalic acid 2-6:3-5:2-3 by volume composition, the weight ratio of pasty material A and inorganic mixed acid
For 1-3.2:4-16, under the conditions of rotating speed is 200-550r/min, add ammonium sulfide stirring, ammonium sulfide and slurry
The weight ratio of material A is 1-2:50-150, is heated to 82-93 DEG C, reacts 1.2-3.2h under the conditions of being maintained at 82-93 DEG C,
Prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out filter pressing under the conditions of pressure is 0.9-0.95MPa,
Prepared moisture content is the filter cake A of 32%-45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is the 6-7.5 of filter cake A weight
Times, stirring and dissolving filter cake A adds flocculant stirring 0.4-1.2h after completing makes solution precipitate, by precipitate in pressure
Power is to carry out filter pressing under the conditions of 0.9-0.95MPa, and prepared moisture content is the filter cake B of 32%-45%, described flocculation
Agent includes that the one in organic flocculant and inorganic flocculating agent, described organic flocculant include sodium polyacrylate, gather
One in calcium acrylate, acrylamide, described inorganic flocculating agent includes in bodied ferric sulfate, polyaluminium sulfate
One；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is the 5-6.5 of filter cake B weight
Times, after stirring and dissolving filter cake B completes, adding concentration is the sodium hydroxide solution of 8%-12%；
S6: the slurry material C that step S5 prepares is carried out filter pressing under the conditions of pressure is 0.9-0.95MPa, system
Obtain the filter cake C that moisture content is 32%-45%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, is 3500-6000r/min at centrifugal rotational speed
Under the conditions of remove water to and pulverize after filter cake C moisture content≤5%, gained ground product crosses 300-600 mesh sieve, prepares negative
Carry sodium hydroxide active hargil.
Below by more specifically embodiment, the present invention will be described.
Embodiment 1
The preparation method of a kind of load hydrogen sodium oxide active hargil, comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 15% are mixed by weight for 2:12, at rotating speed
For stirring under the conditions of 400r/min, prepare pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 15%, described
Inorganic mixed acid be the sulphuric acid of concentration 17wt%, the carbonic acid of concentration 34wt%, concentration 19wt% oxalic acid by body
The long-pending mixed acid than 4:3:2 composition, pasty material A is 2:10 with the weight ratio of inorganic mixed acid, at rotating speed is
Adding ammonium sulfide stirring under the conditions of 400r/min, ammonium sulfide is 2:120 with the weight ratio of pasty material A, heating
To 85 DEG C, react 2.5h under the conditions of being maintained at 85 DEG C, prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out under the conditions of pressure is 0.92MPa filter pressing, prepares
Moisture content is the filter cake A of 40%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 7 times of filter cake A weight,
Stirring and dissolving filter cake A adds sodium polyacrylate after completing and polyaluminium sulfate stirring 0.9h makes solution precipitate, will
Precipitate carries out filter pressing under the conditions of pressure is 0.92MPa, and prepared moisture content is the filter cake B of 38%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 6 times of filter cake B weight,
After stirring and dissolving filter cake B completes, adding concentration is the sodium hydroxide solution of 10%, prepares slurry material C；
S6: the slurry material C that step S5 prepares is carried out under the conditions of pressure is 0.92MPa filter pressing, prepares and contains
Water rate is the filter cake C of 39%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, is 5000r/min condition at centrifugal rotational speed
Under to remove water to filter cake C moisture content be to pulverize after 4%, gained ground product crosses 500 mesh sieves, prepares load hydrogen oxidation
Sodium active hargil.
Embodiment 2
The preparation method of a kind of load hydrogen sodium oxide active hargil, comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 16% are mixed by weight for 2.2:14, is turning
Speed, for stirring under the conditions of 500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 20%, described
Inorganic mixed acid be the sulphuric acid of concentration 18wt%, the carbonic acid of concentration 36wt%, concentration 20wt% oxalic acid by body
The long-pending mixed acid than 6:5:3 composition, pasty material A is 3.2:16 with the weight ratio of inorganic mixed acid, at rotating speed
For adding ammonium sulfide stirring under the conditions of 550r/min, ammonium sulfide is 2:150 with the weight ratio of pasty material A, adds
Heat, to 93 DEG C, is reacted 1.2h, is prepared pasty material B under the conditions of being maintained at 93 DEG C；
S3: the pasty material B that step S2 prepares is carried out under the conditions of pressure is 0.95MPa filter pressing, prepares
Moisture content is the filter cake A of 45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 7.5 times of filter cake A weight,
Stirring and dissolving filter cake A adds bodied ferric sulfate stirring 1.2h after completing makes solution precipitate, by precipitate at pressure
For carrying out filter pressing under the conditions of 0.95MPa, prepared moisture content is the filter cake B of 45%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 6.5 times of filter cake B weight,
After stirring and dissolving filter cake B completes, adding concentration is the sodium hydroxide solution of 12%, prepares slurry material C；
S6: the slurry material C that step S5 prepares is carried out under the conditions of pressure is 0.95MPa filter pressing, prepares and contains
Water rate is the filter cake C of 45%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, is 6000r/min condition at centrifugal rotational speed
Under to remove water to filter cake C moisture content be to pulverize after 5%, gained ground product crosses 600 mesh sieves, prepares load hydrogen oxidation
Sodium active hargil.
Embodiment 3
The preparation method of a kind of load hydrogen sodium oxide active hargil, comprises the following steps:
S1: bentonite and the active hargil waste water that concentration is 13% are mixed by weight for 1.6:10, is turning
Speed, for stirring under the conditions of 200r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%, described
Inorganic mixed acid be the sulphuric acid of concentration 16wt%, the carbonic acid of concentration 32wt%, concentration 18wt% oxalic acid by body
The long-pending mixed acid than 2:3:2 composition, pasty material A is 1:4 with the weight ratio of inorganic mixed acid, at rotating speed is
Adding ammonium sulfide stirring under the conditions of 200r/min, ammonium sulfide is 1:50 with the weight ratio of pasty material A, heating
To 82 DEG C, react 3.2h under the conditions of being maintained at 82 DEG C, prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out under the conditions of pressure is 0.9MPa filter pressing, prepares
Moisture content is the filter cake A of 32%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is 6 times of filter cake A weight,
Stirring and dissolving filter cake A adds acrylamide stirring 0.4h after completing makes solution precipitate, and by precipitate at pressure is
Carrying out filter pressing under the conditions of 0.9MPa, prepared moisture content is the filter cake B of 32%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is 5 times of filter cake B weight,
After stirring and dissolving filter cake B completes, adding concentration is the sodium hydroxide solution of 8%, prepares slurry material C；
S6: the slurry material C that step S5 prepares is carried out under the conditions of pressure is 0.9MPa filter pressing, prepares and contains
Water rate is the filter cake C of 32%；
S7: the filter cake C that step S6 prepares is placed in centrifuge, is 3500r/min condition at centrifugal rotational speed
Under to remove water to filter cake C moisture content be to pulverize after 4%, gained ground product crosses 300 mesh sieves, prepares load hydrogen oxidation
Sodium active hargil.
In embodiment, load hydrogen sodium oxide active hargil moisture content, alkali solubility, alkali volumetric analysis result see table.
As seen from the above table, load hydrogen sodium oxide active hargil product moisture content≤5% prepared by the present invention, alkali is molten
Xie Du is 0.51-0.52gNaOH/100mlH2O, alkali capacity is 19-19.4mmol/g, it can be seen that, this
The load hydrogen sodium oxide active hargil quality that bright technique produces is high and stable.
Above content it cannot be assumed that the present invention be embodied as be confined to these explanation, for skill belonging to the present invention
For the those of ordinary skill in art field, without departing from the inventive concept of the premise, it is also possible to make some letters
Single deduction or replace, all should be considered as belonging to the patent protection model that the present invention is determined by the claims submitted to
Enclose.
Claims (7)
1. the preparation method of a load hydrogen sodium oxide active hargil, it is characterised in that: comprise the following steps:
S1: by bentonite and active hargil waste water that concentration is 13%-16% by weight for 1.6-2.2:10-14
Mixing, stirs under the conditions of rotating speed is 200-500r/min, prepares pasty material A；
S2: the pasty material A that step S1 prepares is joined in the inorganic mixed acid that concentration is 11%-20%,
Described inorganic mixed acid is the sulphuric acid of concentration 16-18wt%, the carbonic acid of concentration 32-36wt%, concentration 18-20wt%
The mixed acid of oxalic acid 2-6:3-5:2-3 by volume composition, the weight ratio of pasty material A and inorganic mixed acid
For 1-3.2:4-16, under the conditions of rotating speed is 200-550r/min, add ammonium sulfide stirring, ammonium sulfide and slurry
The weight ratio of material A is 1-2:50-150, is heated to 82-93 DEG C, reacts 1.2-3.2h under the conditions of being maintained at 82-93 DEG C,
Prepare pasty material B；
S3: the pasty material B that step S2 prepares is carried out filter pressing under the conditions of pressure is 0.9-0.95MPa,
Prepared moisture content is the filter cake A of 32%-45%；
S4: the filter cake A prepared to step S3 adds water stirring and dissolving, and amount of water is the 6-7.5 of filter cake A weight
Times, stirring and dissolving filter cake A adds flocculant stirring 0.4-1.2h after completing makes solution precipitate, by precipitate in pressure
Power is to carry out filter pressing under the conditions of 0.9-0.95MPa, and prepared moisture content is the filter cake B of 32%-45%；
S5: add water stirring and dissolving by the filter cake B that step S4 prepares, and amount of water is the 5-6.5 of filter cake B weight
Times, after stirring and dissolving filter cake B completes, add sodium hydroxide solution, prepare slurry material C；
S6: the slurry material C that step S5 prepares is carried out filter pressing under the conditions of pressure is 0.9-0.95MPa, system
Obtain the filter cake C that moisture content is 32%-45%；
S7: the filter cake C that step S6 prepares is placed in centrifuge and removes water to powder after filter cake C moisture content≤5%
Broken, gained ground product sieves, and prepares load hydrogen sodium oxide active hargil.
The preparation method of load hydrogen sodium oxide active hargil the most according to claim 1, it is characterised in that
Flocculant described in step S4 includes the one in organic flocculant and inorganic flocculating agent.
The preparation method of load hydrogen sodium oxide active hargil the most according to claim 3, it is characterised in that
Described organic flocculant includes the one in sodium polyacrylate, calcium polyacrylate (CPA), acrylamide.
The preparation method of load hydrogen sodium oxide active hargil the most according to claim 3, it is characterised in that
Described inorganic flocculating agent includes one or more in bodied ferric sulfate, polyaluminium sulfate.
The preparation method of load hydrogen sodium oxide active hargil the most according to claim 1, it is characterised in that
Concentration of sodium hydroxide solution described in step S5 is 8%-12%.
The preparation method of load hydrogen sodium oxide active hargil the most according to claim 1, it is characterised in that
The rotating speed of centrifuge described in step S7 is 3500-6000r/min.
The preparation method of load hydrogen sodium oxide active hargil the most according to claim 1, it is characterised in that
Described in step S7, the mesh number of sieve is 300-600 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610260163.2A CN105948069A (en) | 2016-04-25 | 2016-04-25 | Preparation method of activated clay loaded sodium hydroxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610260163.2A CN105948069A (en) | 2016-04-25 | 2016-04-25 | Preparation method of activated clay loaded sodium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105948069A true CN105948069A (en) | 2016-09-21 |
Family
ID=56915348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610260163.2A Pending CN105948069A (en) | 2016-04-25 | 2016-04-25 | Preparation method of activated clay loaded sodium hydroxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105948069A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954477A (en) * | 2017-12-26 | 2019-07-02 | 金昌红泉膨润土有限责任公司 | A kind of atlapulgite acid lowering agent |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557057A (en) * | 2011-12-28 | 2012-07-11 | 攀枝花学院 | Active argil and preparation method thereof |
| CN105271277A (en) * | 2015-02-15 | 2016-01-27 | 广西隆安瑞丰工贸有限公司 | Preparation method for calcium hydrate loading activated clay |
| CN105293797A (en) * | 2015-02-15 | 2016-02-03 | 广西隆安瑞丰工贸有限公司 | Method for co-production of aluminum potassium sulfate and gypsum through activated clay production mother liquid |
-
2016
- 2016-04-25 CN CN201610260163.2A patent/CN105948069A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557057A (en) * | 2011-12-28 | 2012-07-11 | 攀枝花学院 | Active argil and preparation method thereof |
| CN105271277A (en) * | 2015-02-15 | 2016-01-27 | 广西隆安瑞丰工贸有限公司 | Preparation method for calcium hydrate loading activated clay |
| CN105293797A (en) * | 2015-02-15 | 2016-02-03 | 广西隆安瑞丰工贸有限公司 | Method for co-production of aluminum potassium sulfate and gypsum through activated clay production mother liquid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109954477A (en) * | 2017-12-26 | 2019-07-02 | 金昌红泉膨润土有限责任公司 | A kind of atlapulgite acid lowering agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105565331A (en) | Preparation method of alkaline porcelain clay | |
| CN105949639A (en) | Preparation method of modified bentonite PVC heat stabilizer | |
| CN102583453B (en) | Industrial method for producing battery-grade lithium carbonate or high-purity lithium carbonate | |
| CN105271277B (en) | A kind of preparation method of loaded calcium hydroxide activity carclazyte | |
| CN1318518C (en) | Process for preparing iron oxide red by using sulfuric acid crystal seed mixed acid method and products thereby | |
| CN104961123A (en) | Natural graphite ore stripping and purifying method | |
| CN103432987B (en) | Preparation method of modified kieselguhr water purifying agent | |
| CN105540603A (en) | Method for preparing sodium-hydroxide-loaded active clay | |
| CN105885300A (en) | Novel environment-friendly PVC (polyvinyl chloride) heat stabilizer | |
| CN103991940B (en) | A kind of coal ash for manufacturing is for hybrid flocculant technique | |
| CN103880211B (en) | A kind of recycling treatment process containing magnesium high-salt wastewater | |
| CN105948069A (en) | Preparation method of activated clay loaded sodium hydroxide | |
| CN101851054B (en) | Sludge dewatering conditioner, and preparation method and application thereof | |
| CN103466713A (en) | Method for preparing manganese sulfate monohydrate with low-grade manganese ore through primary crystallization by high-pressure method | |
| CN105036803A (en) | Method for preparing gilvous occlusion pigment from cadmium-containing waste acid solution generated in acid pickling process | |
| CN105860335B (en) | A kind of preparation method of PVC heat stabilizer | |
| CN102602946A (en) | Method for preparing high-specific-surface white carbon black by circularly utilizing waste water including sodium sulfate | |
| CN105776481B (en) | Double modified stalk fiber treatment of dyeing/printing wastewaters of xanthate cation and preparation method thereof | |
| CN102730805B (en) | Composite phosphate removing decolorant and method thereof for removing phosphor and decolouring | |
| CN102211774B (en) | Method for purifying silica micropowder through selective flocculation | |
| CN105565354A (en) | Preparation method of supported calcium hydroxide activated clay | |
| CN103275356B (en) | Method for preparing high-performance low-cobalt borate acylated cobalt adhesion promoter | |
| CN106881062A (en) | A kind of preparation method of the magnesium hydroxide-flyash built agent for processing fluoride waste | |
| CN105948068A (en) | Preparation method of alkaline white clay | |
| CN104843760B (en) | Method for producing precipitated barium sulfate and co-producing manganese chloride |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |