CN1077969A - With the wollastonite is the method for raw material production white carbon black - Google Patents
With the wollastonite is the method for raw material production white carbon black Download PDFInfo
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- CN1077969A CN1077969A CN 93104590 CN93104590A CN1077969A CN 1077969 A CN1077969 A CN 1077969A CN 93104590 CN93104590 CN 93104590 CN 93104590 A CN93104590 A CN 93104590A CN 1077969 A CN1077969 A CN 1077969A
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- carbon black
- white carbon
- wollastonite
- raw material
- acidolysis
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Abstract
The present invention relates to a kind of Chemicals---the white carbon black production method.
White carbon black is widely used in fields such as latex, plastics, leather, coating, chemical fertilizer.
Major technique of the present invention is characterised in that with the wollastonite to be raw material, obtains through dilute sulphuric acid acidolysis, precipitation, washing, drying, pulverizing, and its reaction formula is CaSiO
2+ H
2SO
4-→ CaSO
4+ SiO
2+ H
2O and yield are up to more than 60%.Production cost is low, sufficient raw.
The white carbon black of producing with the present invention has high and low, the no waste gas discharge of burning decrement of dioxide-containing silica.
Description
The present invention relates to a kind of Chemicals-white carbon black production method.
White carbon black is a kind of ultra tiny, has the active silica particle, and its chemical name is a hydrated SiO 2, and molecular formula is SiOnnH
2O.Be widely used in fields such as rubber, plastics, leather, coating, chemical fertilizer.
At present, it is more to produce method for white carbon black, and the method that adopts for the product that obtains different purposes is also different, four kinds of methods is generally arranged, two kinds of pyroprocesss, two kinds of wet-precipitated.
Two kinds of pyroprocesss: (1) flame hydrolysis; (2) arc process.Two kinds of wet-precipitated: (1) precipitator method; (2) hot-water process.
The white carbon black that arc process and hot-water process produce is mainly used in the delustering agent of coating and lacquer.
Flame hydrolysis is the typical reinforcement or the important filler of silicon rubber.
The precipitator method are mainly used in supporting material or other field of rubber.
Which kind of method no matter above-mentioned production white carbon black take, its main raw material all is a water glass, and the production of water glass consumes a large amount of soda ash and the energy, and capital construction investment is also big, so the white carbon black cost height of producing, so product production and application facet all are restricted.
The objective of the invention is to propose a kind of is the method for raw material production white carbon black with the natural mineral wollastonite, and has reduced production cost, sufficient raw.
The present invention is characterized in the wollastonite to be raw material, pass through acidolysis, precipitation, washing, drying, be crushed to out product-white carbon black.
The white carbon black of producing through the present invention has less investment, and raw material is easy to get, and energy consumption is low, has reduced the raw material expense.In addition, replace the vitriol oil with dilute sulphuric acid (7-10%), reduced environmental pollution in the acidolysis process.A new raw material route and operational path have been opened up, for wollastonite mineral products resources development and utilization has been opened up a new way.
Accompanying drawing and drawing explanation:
Fig. 1 is the flame hydrolysis reaction formula of pyroprocess;
Fig. 2 is the arc process reaction formula of pyroprocess;
Fig. 3 is the wet precipitation reaction formula;
Fig. 4 is a wet method hot-water process reaction formula;
Fig. 5 is that the present invention is the reaction formula of raw material production white carbon black with the wollastonite;
Fig. 6 is a technological process block-diagram of the present invention;
Fig. 7 is an acidolysis schema of the present invention.
Further specify technical process according to Fig. 5, Fig. 6, Fig. 7.Fig. 5 is to be raw material production white carbon black reaction formula with the wollastonite powder:
Fig. 6, dilute sulphuric acid, wollastonite powder carry out acidolysis 1, add conditioning agent A, flocculating agent B, precipitation 2, washing 3, drying 4, pulverizing 5, finished product 6, packing 7.
Be illustrated in conjunction with Fig. 6, Fig. 7.
1, acidolysis
At first 7-10% concentration sulfuric acid is put into φ 1800 * 2500 hard PVC storage tanks 8, analytical concentration, squeeze in φ 1200 * 1400PVC test tank 9 standby with HJB-32-125 acid-proof ceramics vacuum pump then, squeeze in φ 800 * 1200 carbon steel water measuring tanks 10 water standby, the water of test tank is added φ 1524 * 3485 enamel acidolysis stills 11, begin to stir, the wollastonite 12 that adds metering then, when temperature is raised to 40-50 ℃, the 7-10% dilute sulphuric acid 13 that adds metering, this moment, temperature can constantly rise, and opened water coolant 14, control acidolysis temperature 10-30 minute, reaction terminating.The material that acidolysis is good is promptly put into φ 1200 * 100PVC vacuum filter 15, and gained filtrate is absorbed the rare W liquid of φ 1524-3485 enamel basin 16, squeezes into test tank with pump then.
2, precipitation
With the flocculation agent of metering, send into φ 1524-3485 enamel stillpot, add a certain amount of conditioning agent again, make it meet the requirements of pH value, open stillpot heating steam, the temperature of stillpot is elevated to requires temperature, begin slow overflowing again and drip W liquid, during pH value when pH value reaches requirement, white precipitate occurs, begin again, drip conditioning agent, make pH value control same pH value all the time, monitor with acidometer, reacted 100-180 minute, and added souring agent and handle discharging in 15 minutes.
3, washing
The precipitation material is put into vacuum filter and is driven vacuum pump and cross mother liquor, and under continuous condition of stirring, hot water wash four times is checked salt and sulfate radical content, reach qualified till.
4, drying
Kiln is sent in the material sabot that washing is good, and oven dry control moisture content≤6% is sent into break section.
5, pulverize
With the material of≤6% moisture content, start pulverizer and pulverize.
6, packing
The material that crushes is packed.
The yield of each processing step of the present invention:
1, the acidolysis yield is 69%;
2, the precipitation yield is 91.6%
3, the washing yield is 94.8%
The loss amount of each processing step:
1, once drops into the 80kg wollastonite powder, can get silicon-dioxide (100% calculates) and be 39.2kg.
2, the actual silicon-dioxide that is decomposited by acid (calculating by 100%) is 27.0kg.
3, hold back silicon-dioxide (100% calculates) in the gypsum tailings and be 12.2kg.
The actual finished product 23.8kg that gets, yield reaches 60-65%.
Influence factor of the present invention
1, acidolysis process part
(1) correlation factors is very big to the acidolysis influence, as temperature, reaction times, breeze granularity, stirring velocity, filtration velocity etc.
(2) acidolysis temperature has a significant impact dioxide-containing silica in the W liquid and the silica volume that is settled out, silica volume increases along with the rising of temperature, and still, temperature is too high, easily make colloidal sol form two molecules or termolecular gel, silicon-dioxide will reduce like this.
(3) breeze granularity, thin more good more, but consider cost, 100 order powder just can reach the purpose of production.
(4) should extract silicon-dioxide in the wollastonite at short notice, can gelation influence yield as overlong time.
(5) should under heat condition, filter, be difficult to carry out otherwise filter.
2, depositing technology part
(1) several relevant factors are to the sedimentary influence of white carbon black, as: the dosage of pH value, temperature, time, conditioning agent, flocculation agent etc.
(2) resulting white carbon black under different pH values, to the rubber physical mechanical property test shows, pH value LR low reinforcing weak effect in bigger pH value scope, has reinforcing effect preferably to cis-butadiene cement, butadiene-styrene rubber.
3, acidolysis environment division
(1) the acidolysis still is comparatively reasonable with enamel, glass equipment; Because be acidic medium, equipment itself also will bear heat.
(2) acidolysis is filtered, and makes The more the better that rare W liquid tells, and can improve yield like this.The rate device of mistake can adopt PVC to make.But screen plate must be made with stainless steel.Technical requirements to strainer is: A, withstand temp; B, bear external pressure; C, require intensity preferably; D, filtration area requirement because filtration time required in 20 minutes, as are had ready conditions optional 16/450-25 polypropylene material, flame filter press.
(3) the supporting miscellaneous equipment of acidolysis is as test tank, pipeline, basin, all should adopt the manufacturing of PVC material.
4, precipitation equipment component
(1), heavy decide still and adopt enamel, glass equipment, flocculation agent, conditioning agent, blend tank, test tank comprise all pipelines, all use the non-metallic material manufacturing, avoid polluting pump employing Stainless Steel Pump.
(2), thermometric instrument, it is accurate accurate that the pH value metrical instrument is wanted, and especially should adopt the continuously tested instrument, can observe the pH value changing conditions.
(3) filter the automatic van-type XMAG60/100 pressure filter of employing, can finish washing, filter-pressing process simultaneously.
(4), drying and crushing, can adopt WJOPG series, Highspeedcentrifugingandsprayingdrier, steam is selected for use according to industrial scale, as 70 tons/year of pilot scales, can select for use the maximum quantity of steam 15-40kg/n of WJ-30 thermal source can adopt electricity to add steam, the hotblast stove dry powder rate of recovery 〉=95%.
With the white carbon black that the present invention produces, it is high and burning decrement is low to have a dioxide-containing silica, no waste gas discharge, and so-called waste residue is a gypsum, directly making cement is done material of construction after the modification, can also be used to producing vitriolate of tartar.
Claims (2)
1, a kind of method of producing white carbon black through acidolysis, precipitation, washing, drying, pulverizing is characterized in that dilute sulphuric acid acidolysis wollastonite powder, and reaction formula is
2,, it is characterized in that dilute sulphuric acid concentration 7-10% according to the production method of the described white carbon black of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104590 CN1077969A (en) | 1993-04-20 | 1993-04-20 | With the wollastonite is the method for raw material production white carbon black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104590 CN1077969A (en) | 1993-04-20 | 1993-04-20 | With the wollastonite is the method for raw material production white carbon black |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1077969A true CN1077969A (en) | 1993-11-03 |
Family
ID=4985251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93104590 Pending CN1077969A (en) | 1993-04-20 | 1993-04-20 | With the wollastonite is the method for raw material production white carbon black |
Country Status (1)
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|---|---|
| CN (1) | CN1077969A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049675C (en) * | 1994-08-29 | 2000-02-23 | 华东理工大学 | white compounded filler and its processing method |
| CN1055296C (en) * | 1995-03-17 | 2000-08-09 | 武汉工业大学北京研究生部 | Prepn of silica white with opal and diatomite |
| WO2001058831A1 (en) * | 2000-02-08 | 2001-08-16 | Peter Warren English | A soil supplement containing plant available silicon |
| AU747244B2 (en) * | 2000-02-08 | 2002-05-09 | Peter Warren English | A soil supplement containing plant available silicon |
-
1993
- 1993-04-20 CN CN 93104590 patent/CN1077969A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049675C (en) * | 1994-08-29 | 2000-02-23 | 华东理工大学 | white compounded filler and its processing method |
| CN1055296C (en) * | 1995-03-17 | 2000-08-09 | 武汉工业大学北京研究生部 | Prepn of silica white with opal and diatomite |
| WO2001058831A1 (en) * | 2000-02-08 | 2001-08-16 | Peter Warren English | A soil supplement containing plant available silicon |
| AU747244B2 (en) * | 2000-02-08 | 2002-05-09 | Peter Warren English | A soil supplement containing plant available silicon |
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