CN1292016C - Method for treating organic silicon waste residue slurry - Google Patents
Method for treating organic silicon waste residue slurry Download PDFInfo
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- CN1292016C CN1292016C CNB2003101153862A CN200310115386A CN1292016C CN 1292016 C CN1292016 C CN 1292016C CN B2003101153862 A CNB2003101153862 A CN B2003101153862A CN 200310115386 A CN200310115386 A CN 200310115386A CN 1292016 C CN1292016 C CN 1292016C
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- hydrolysis
- waste residue
- hydrolyzate
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000002002 slurry Substances 0.000 title claims abstract description 37
- 239000002699 waste material Substances 0.000 title claims abstract description 22
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title abstract description 5
- 229910052710 silicon Inorganic materials 0.000 title abstract description 5
- 239000010703 silicon Substances 0.000 title abstract description 5
- 230000007062 hydrolysis Effects 0.000 claims abstract description 41
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 41
- 239000007787 solid Substances 0.000 claims abstract description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052802 copper Inorganic materials 0.000 claims abstract description 17
- 239000010949 copper Substances 0.000 claims abstract description 17
- 239000000178 monomer Substances 0.000 claims abstract description 13
- 230000005484 gravity Effects 0.000 claims abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 22
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 19
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 12
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 12
- 238000009835 boiling Methods 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 150000001282 organosilanes Chemical class 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 6
- -1 siloxanes Chemical class 0.000 claims description 5
- 238000005336 cracking Methods 0.000 claims description 3
- 239000001117 sulphuric acid Substances 0.000 claims description 3
- 235000011149 sulphuric acid Nutrition 0.000 claims description 3
- 239000012265 solid product Substances 0.000 claims 1
- 239000000413 hydrolysate Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000003301 hydrolyzing effect Effects 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 229910000365 copper sulfate Inorganic materials 0.000 abstract 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- 239000002893 slag Substances 0.000 description 20
- 239000000243 solution Substances 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000000203 mixture Substances 0.000 description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 6
- 239000000460 chlorine Substances 0.000 description 6
- 229910052801 chlorine Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 4
- 230000000887 hydrating effect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000693 micelle Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- YGZSVWMBUCGDCV-UHFFFAOYSA-N chloro(methyl)silane Chemical compound C[SiH2]Cl YGZSVWMBUCGDCV-UHFFFAOYSA-N 0.000 description 2
- 238000005188 flotation Methods 0.000 description 2
- 235000013312 flour Nutrition 0.000 description 2
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002480 mineral oil Substances 0.000 description 2
- 235000010446 mineral oil Nutrition 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 101100232929 Caenorhabditis elegans pat-4 gene Proteins 0.000 description 1
- 241000370738 Chlorion Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- KOPOQZFJUQMUML-UHFFFAOYSA-N chlorosilane Chemical compound Cl[SiH3] KOPOQZFJUQMUML-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- PZPGRFITIJYNEJ-UHFFFAOYSA-N disilane Chemical compound [SiH3][SiH3] PZPGRFITIJYNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 150000001367 organochlorosilanes Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical group O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
A method for treating waste residue slurry in the synthetic process of an organic silicon monomer. Most of high-boiling-point substances (recovered) are separated by centrifugal gravity settling, and the hydrolysate obtained by hydrolyzing the residual slurry is easy to extract and free of reducing copper, so that potential safety hazards are eliminated; copper in the slurry is enriched in the hydrolysis solution in the form of copper sulfate and can be recovered by a reduction method, and the recovery rate of the copper reaches more than 95 percent; the solid hydrolysate meets the requirement of environmental protection and can be buried in a heap.
Description
Technical field
The present invention relates to the treatment process of the waste residue slurry that forms in the organosilane monomer building-up process.
Background technology
The waste residue slurry that produces in the organosilane monomer building-up process accounts for 3% of monomer output.Produce 50000 tons of devices per year and will produce 1500 tons of waste residue slurries, cause a large amount of chlorine damages to lose.Organic silicon waste residue slurry liquid composition boiling point is greater than 75 ℃ (mainly containing disilane, sily oxide, silicon support alkane etc.), and various metals such as the silica flour that suspends, copper, tin are exposed to easy firing and formation acid mist in the air in addition.If adopt the method for piling up to handle, seriously polluted, and have potential safety hazard.And domestic aspect the waste residue slurry treatment technology still blank, can only overstock stifled storehouse at present or simply reclaim copper, fundamentally do not solve environmental issue and cause the waste of chlorine.The external main technology for hydrolyzing that adopts.
US Pat 4 221 691 provides a kind of method of handling waste residue slurry: add a spot of mineral oil to improve the treatment characteristic of hydrolyzate in the slag slurry.But the shortcoming of this method is: the slag slurry contacts insufficient with hydrolysis medium, the velocity ratio of hydrolysis is slower, and the hydrolyzate that obtains is the thickness state, is difficult to separate from system; In addition, this method requires in the organosilane monomer molecule of slag slurry, and the cl radical that connects on each Siliciumatom is no less than 3, but the monomer in most of slag slurry does not satisfy its requirement, therefore can not use this method to handle most of slag slurries; And adding mineral oil will increase the waste disposal expense in hydrolytic process, and increase new source of pollution, not meet environmental requirement.
US 4 408 030 provides a kind of waste material treatment process of many logistics of chlorine-containing silane, comprises the steps: that (A) measures the average SICL functionality of logistics; (B) mix at least two kinds of logistics so that the SICL functionality of mixture flow more than or equal to 2.8; (C) between 50 ℃ and hydrolysis medium boiling point, make its hydrolysis with hydrolysis medium mixture stream, and (D) separate hydrolysis medium, obtain micelle, this micelle is easily handled in subsequent processes, convenient transportation and further handle operation.Hydrolysis medium wherein is selected from water, calcium chloride solution, reaches concentrated hydrochloric acid solution.The preferred 60-90 of hydrolysis temperature ℃.The HCL that produces in the recyclable hydrolytic process.Micelle in this method can be with washing, with the cl content in the further minimizing micelle.If hydrating solution is only moisture at first, then, form hydrochloric acid along with the carrying out of hydrolysis, when the hydrochloric acid in the water was saturated, hydrogenchloride just parsed.Can add hydrochloric acid in the hydrolysis medium and butter reaches capacity hydrating solution, hydrogenchloride just parsed in the hydrolysis initial stage like this.Hydrolyzate is by filtering or centrifugal and liquid separation, and gained solid hydrolysis composition granule does not adhere to, and is easy to handle, and conveniently transports and further handles and operate, and hydrolyzate also used water one or many washes, and further reduces the content of chlorine in the hydrolyzate.The shortcoming that this method exists is as follows: one, make hydrolysis medium with water, calcium chloride solution or concentrated hydrochloric acid solution, and the hydrolysis particle is tiny, is not easy to extraction from reactor; Its two, the adsorbed chlorion concentration in hydrolyzate surface reaches more than 10%, if want to reduce to low concentration, needs big water gaging flushing, the spent acid solution quantity discharged is big.
EP 867442A2 has introduced a kind of hydrolysis process of methyl chlorosilane by product, and this technology obtains two-phase at least, is included in the by product to add water medium and be hydrolyzed, and can contain tensio-active agent in the water medium, and PH is at least about 7, and temperature is higher than 0 ℃.Wherein one be the inert solid mutually, second is the aqueous solution mutually, is substantially free of metal, can treated or not treated direct discharging.Available filtration, precipitation, flotation or centrifugation technique separate solid, and separate water medium to reclaim salt, silicate or to drain into wastewater treatment equipment.Tensio-active agent is negatively charged ion or nonionogenic tenside, preferred nonsurfactant.The advantage of this technology is: one, this method have reduced the heavy metal concentration in the hydrolyzed solution, have solved the difficult problem of waste treatment, and the product that hydrolysis process obtains is an inertia, high flash point, and no gas is separated out, and thickness, dustless easily mobile is not easy to handle and transportation.Its two, copper is enriched in the solid hydrolyzate, can fully reclaim.Shortcoming is: the alkali neutralization that the hydrogenchloride of one of reaction product is hydrolyzed in the medium becomes salt, has wasted a part of resource; In addition the copper of the reductibility that contains in the solid hydrolyzate be heated, sunlight shines for a long time or the situation of piling up under spontaneous combustion takes place easily, be an important potential safety hazard.
DE4 116925 A1 have introduced a kind of hydrolysis process of methyl chlorosilane by product, by the raffinate of being made up of the direct mixture of chloro-and/or organochlorosilane is prepared, temperature (mainly being between 35 ℃~60 ℃) when 20 ℃ are raised to 100 ℃, with concentration is that the sulfuric acid of 20%~70% (mainly being 40%~60% concentration) mixes, and with isolated hydrolyzate--calcium hydroxide, calcium oxide, lime carbonate or its mixture carry out neutralization reaction, till producing a kind of unsteady solid of mainly being made up of polysiloxane or alginic acid.By with after calcium hydroxide, calcium oxide, lime carbonate or its mixture mix, can from original wet hydrolyzate, produce a kind of exsiccant suspended solids.This solid comprises residue muriate and a spot of 20%wt water of maximum 5%wt, and waste proportion amounts to 0.5~1 grams per milliliter.The hydrolysis or be used for washing and dry those conversion reaction things, gaseous hydrogen chloride once more of liquid phase after the separation.The main drawback of this technology is that dreg slurry phase complete hydrolysis is fallen, and has caused waste.
Summary of the invention
The present invention overcomes the above-mentioned shortcoming of prior art, and the hydrolysis process for treating of the waste residue slurry that forms in a kind of organosilane monomer building-up process is provided.
The treatment process of the waste residue slurry in the organosilane monomer building-up process provided by the invention comprises the steps:
(A) the waste residue slurry process gravity settling whizzer during organosilane monomer synthesizes is isolated the high boiling material of 90% (weight percentage), is used for cracking and other purposes;
(B) the full-bodied waste residue slurry after centrifugal is hydrolyzed in hydrolysis kettle, and hydrolysis medium is 68.6% sulphuric acid soln;
(C) hydrogen chloride gas that contains siloxanes is on a small quantity separated out from liquid phase;
(D) hydrolyzate is through liquid-solid separation, and the solid hydrolyzate discharges, and liquid phase reclaims copper after subsequent disposal.
The solid-liquid mixed waste of handled raw material slag slurry for producing in the direct method synthesizing organosilicon monomer process in the inventive method, its major ingredient is solid particulates such as high boiling material and silica flour, the content of solid particulate is 20%, through after the gravity settling separation, high boiling material wherein major part is separated, and the solid content that is about to send to the slag slurry of hydrolysis will reach 70%.Another inventive point of the present invention is that the present invention directly uses 68.6% high-concentration sulfuric acid in next step processing, this is to separate because of the high boiling material in raw material major part, therefore required hydrolysis medium---the vitriolic amount also significantly reduces, and another major reason is to adopt high-concentration sulfuric acid also to help reclaiming copper.
Hydrolysis temperature in present method is 30-90 ℃, preferred 55-65 ℃.The concentration of hydrolysis medium sulphuric acid soln is 68.6%.
In industrialized unit, because handled slag slurry thickness, difficult mobile also can adopt the gravity settling separating centrifuge of being with the spiral pusher device, so that fill process is carried out smoothly.
The hydrogen chloride gas that contains siloxanes on a small quantity that produces in this method can enter the neutralization of alkali absorption tower.
Hydrolyzate can through liquid-solid separator, carry out liquid-solid separation (filtration, precipitation, flotation or centrifugation technique separate solid) from the overflow of hydrolysis kettle sidewall, and the solid hydrolyzate is buried; Liquid phase enters the sour water storage tank, reclaims copper through ways such as reduction.
The charging at the bottom of the still of slag slurry raw material is to increase the duration of contact of itself and hydrolysis medium.Sulfuric acid is the commercially available prod.
Accompanying drawing 1 is a process flow sheet of the present invention, wherein:
1. water pipeline 2. sulfuric acid pipelines
3. the high viscosity slag is starched pipeline 4. solid-liquid separators
5. separate back solid hydrolyzate and discharge 6. acid hydrolysis solution basins
7. alkali tourie 8. slags are starched raw material
9. isolated high boiling material
The present invention compares its advantage with prior art and is: it is that 20% slag slurry passes through that the present invention makes earlier solid content The centrifugal gravity sedimentation separation goes out the high viscosity slag slurry of most high-boiling components and 70%, and the high-boiling components that obtains can advance One step cracking is to reclaim diformazan and other useful monomers. 70% high viscosity slag slurry is hydrolyzed and makes the slag slurry then In copper be enriched in the hydrating solution and further reclaimed, the recovery of copper rate reaches more than 95%, the consolidating of formation The body hydrolysate can meet the requirement of environmental protection, can pile and bury processing.
Embodiment
Embodiment 1
Raw material slag slurry can flow under condition of stirring for solid content is 20% liquid-solid mixture.The solid content of the high viscosity slag slurry that obtains after gravity settling separation is 66%, and is mobile very poor, is used as the raw material of testing below.Can adopt the gravity settling separating centrifuge of band spiral pusher device.
In having the there-necked flask that stirs condenser and thermometer, add entry 300g, 98% H
2SO
4700g under 60 ℃ of conditions, added 210g slag slurry in reactor in 30 minutes, separate out HCl gas from reactor top, contained the H of HCl
2SO
4And the suspension of solid hydrolyzate (mainly existing with the silicic acid form), overflow to the strainer from sidewall, isolate hydrolysate at this, obtain hydrolyzate weight in wet base 285g, filtrate 925g, cl content 4.55%.The hydrogenchloride that parses absorbs through alkali lye, and hydrating solution reclaims copper, reclaims chlorine 96%.
Embodiment 2
Water 700g, 98% sulfuric acid 300g, other condition is with example 1.Obtain hydrolyzate weight in wet base 280g, filtrate 930g, cl content 3.24%.The rate of recovery of the solution copper after the hydrolysis reaches 90%, can meet the demands.
Embodiment 3
Water 400g, 98% sulfuric acid 600g, other condition is with example 1.Obtain hydrolyzate weight in wet base 295g, filtrate 940g, cl content 4.65%.The rate of recovery of the solution copper after the hydrolysis reaches 93%, can meet the demands.
Comparative Examples 1
The hydrolyzate particle that obtains is tiny, because sulfuric acid concentration diminishes, liquid-solid being mixed in forms turbid solution together, and be not easily separated.The cl content of the hydrolyzate that obtains is 5.24%.
Comparative Examples 2
Hydrolysis medium is used 1000 gram water instead, and other condition is with example 1.The wet hydrolysate that obtains is difficult to separate, cl content 11.8%, wet moisture 50% (weight) of mashed prod, residual chlorine content 14.1%.
Comparative Examples 3
Temperature of reaction is 20 ℃, and other condition is with example 1.The hydrolyzate particle that obtains is tiny, thickness, should not separate.
Comparative Examples 4
Hydrolysis medium is 27% hydrogen chloride solution, and add-on is 1000g.Parameter such as reaction unit, condition is with example 1.The hydrolyzate and the solution that obtain mix, and should not separate.
Comparative Examples 5
Hydrolysis material is that solid content is 20% a slag slurry, and parameters such as reaction unit, condition are with example 1, the contained all high boiling material of slag slurry all hydrolysis fallen, wasted a very big resource.The principal product that hydrolysis obtains is hydrogen chloride gas and reclaims copper.
Claims (4)
1. the treatment process of the waste residue slurry in the organosilane monomer building-up process comprises the steps:
(A) to isolate weight percentage through the centrifugal gravity settling centrifuge be 90% high boiling material to the waste residue slurry of organosilane monomer in synthetic, is used for cracking and other purposes;
(B) the full-bodied waste residue slurry after centrifugal is hydrolyzed in hydrolysis kettle, and hydrolysis medium is 68.6% sulphuric acid soln, and hydrolysis temperature is 30-90 ℃
(C) hydrogen chloride gas that contains siloxanes is on a small quantity separated out from liquid phase;
(D) hydrolyzate is through liquid-solid separation, and the solid hydrolyzate discharges, and liquid phase reclaims copper through subsequent disposal.
2. method according to claim 1 is characterized in that hydrolysis temperature is 55-65 ℃.
3. method according to claim 1 is characterized in that gravity settling separating centrifuge wherein has the spiral pusher device.
4. method according to claim 1 is characterized in that wherein hydrolyzate from the overflow of hydrolysis kettle sidewall, obtains solid product by liquid-solid separation.
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CNB2003101153862A CN1292016C (en) | 2003-11-21 | 2003-11-21 | Method for treating organic silicon waste residue slurry |
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CNB2003101153862A CN1292016C (en) | 2003-11-21 | 2003-11-21 | Method for treating organic silicon waste residue slurry |
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2003
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