CN100497415C - Cationic dehydrating agent preparation method - Google Patents
Cationic dehydrating agent preparation method Download PDFInfo
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- CN100497415C CN100497415C CNB2005100475425A CN200510047542A CN100497415C CN 100497415 C CN100497415 C CN 100497415C CN B2005100475425 A CNB2005100475425 A CN B2005100475425A CN 200510047542 A CN200510047542 A CN 200510047542A CN 100497415 C CN100497415 C CN 100497415C
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- 125000002091 cationic group Chemical group 0.000 title claims abstract description 28
- 239000012024 dehydrating agents Substances 0.000 title claims description 17
- 238000002360 preparation method Methods 0.000 title claims description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000010298 pulverizing process Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 18
- 239000003999 initiator Substances 0.000 claims description 17
- 239000000178 monomer Substances 0.000 claims description 16
- MPNXSZJPSVBLHP-UHFFFAOYSA-N 2-chloro-n-phenylpyridine-3-carboxamide Chemical compound ClC1=NC=CC=C1C(=O)NC1=CC=CC=C1 MPNXSZJPSVBLHP-UHFFFAOYSA-N 0.000 claims description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000006116 polymerization reaction Methods 0.000 claims description 13
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 9
- 239000004160 Ammonium persulphate Substances 0.000 claims description 7
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 7
- 235000019395 ammonium persulphate Nutrition 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 238000007664 blowing Methods 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 238000005453 pelletization Methods 0.000 claims description 7
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 claims description 7
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 7
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 6
- 159000000000 sodium salts Chemical class 0.000 claims description 6
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 4
- 239000012966 redox initiator Substances 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- AOSFMYBATFLTAQ-UHFFFAOYSA-N 1-amino-3-(benzimidazol-1-yl)propan-2-ol Chemical compound C1=CC=C2N(CC(O)CN)C=NC2=C1 AOSFMYBATFLTAQ-UHFFFAOYSA-N 0.000 claims description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 2
- PQUCIEFHOVEZAU-UHFFFAOYSA-N Diammonium sulfite Chemical compound [NH4+].[NH4+].[O-]S([O-])=O PQUCIEFHOVEZAU-UHFFFAOYSA-N 0.000 claims description 2
- 239000004159 Potassium persulphate Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 229960001484 edetic acid Drugs 0.000 claims description 2
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 claims description 2
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 claims description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 2
- 235000019394 potassium persulphate Nutrition 0.000 claims description 2
- BHZRJJOHZFYXTO-UHFFFAOYSA-L potassium sulfite Chemical compound [K+].[K+].[O-]S([O-])=O BHZRJJOHZFYXTO-UHFFFAOYSA-L 0.000 claims description 2
- 235000019252 potassium sulphite Nutrition 0.000 claims description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 2
- 239000010802 sludge Substances 0.000 abstract description 16
- 239000010865 sewage Substances 0.000 abstract description 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- 235000019270 ammonium chloride Nutrition 0.000 abstract 1
- 230000000379 polymerizing effect Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 16
- 239000003921 oil Substances 0.000 description 9
- 238000007334 copolymerization reaction Methods 0.000 description 6
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 230000008676 import Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- -1 amidine propane dihydrochlorides Chemical class 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920006317 cationic polymer Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 description 1
- GQOKIYDTHHZSCJ-UHFFFAOYSA-M dimethyl-bis(prop-2-enyl)azanium;chloride Chemical compound [Cl-].C=CC[N+](C)(C)CC=C GQOKIYDTHHZSCJ-UHFFFAOYSA-M 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229940072033 potash Drugs 0.000 description 1
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 1
- 235000015320 potassium carbonate Nutrition 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000003011 styrenyl group Chemical class [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Treatment Of Sludge (AREA)
Abstract
A cationic dewatering agent for treating sewage or sludge is prepared from acrylamide, methylacrolyloxyethyl ammonium chloride and deionized water through polymerizing reaction in solution under the action of trigger, granulating, drying and pulverizing.
Description
Technical field
The present invention relates to a kind of preparation method of cationic dehydrating agent, particularly in oil, the chemical industry production process, the oily sludge that is produced is handled the preparation method of the cationic dehydrating agent of usefulness.
Background technology
Oily sludge mainly results from oil field and refinery, and as in dehydrating of crude oil, there are a large amount of oily sludges in bottoms such as water knockout, storage tanker and slop oil tank; In the oil field, also there are a large amount of oily sludges in the oil trap in the sewage-farm of refinery, flotation cell, aeration tank etc.The composition of these mud is very complicated, generally forms by oil-in-water (O/W), water-in-oil (W/O) and suspended solids, and fully emulsified, viscosity is bigger, is difficult to sedimentation.Because the technological process difference that oily sludge produces, its oil-containing, moisture difference are bigger, and wherein oil is made up of hundreds of dissimilar organic compound, and majority is poisonous and harmful and is difficult to biodegradable material.Solid particulate in mud, is emulsified state Gu oil-water-three mixes with minimum particle distribution in the oily sludge, and environment is had great hazardness.
Carrying out processed before the final processing of mud is absolutely necessary.The effect of dewatering agent be exactly in and the electric charge of solid particles band, the net connection is built bridge, condense thereby make between the molecule of mud, finally become macrobead, thereby improve its solid-liquid separation performance.In recent years, organic polymer coargulator development has wide in varietyly rapidly, and consumption is few, and it is few to give birth to slag, is easy to solid-liquid separation and reduces advantage such as equipment corrosion, occupies more and more important position in water treatment field.Disclosed a kind of cationic high-molecular flocculant as Chinese patent CN1247838A, it is that to adopt polyacrylamide, formaldehyde, dimethylamine be main raw, reacts the colloid of the amine methyl polyacrylamide that obtains now by Manny.There are shortcomings such as the loaded down with trivial details and flocculation agent effective content that obtain of technological process is low in this method.CN1305976A has disclosed a kind of treatment process of mud.It is to adopt in mud behind the adding ferrous sulfate, add the cationic-type polyacrylamide flocculation agent again, and the mud after will flocculating to pass through pressure-filtering separating machine.Through behind the isolating clod natural air drying, pulverize with Universalpulverizer, and after adding a certain amount of nitrogen, phosphorus, potash fertilizer therein, as fertilizer sources uses.This method can cause secondary environmental pollution.CN1248173A is used in combination with cationic polymer flocculent or inorganic flocculating agent with sulfonated styrene polymer and/or its salt, as sludge dehydrating agent.CN1464887A is a dewatering agent with the modifier of polyalkyleneimine, is mainly used in the paper making raw material pretreating reagent.The dewatering of above-mentioned dewatering agent needs further to improve.Chinese patent CN1336391A has disclosed a kind of cationic flocculant, and it is that to adopt inorganic ammonium salt, alkanoic, Dicyanodiamide be main raw, obtains through polycondensation.The flocculating agent molecule amount that this method obtains is lower, shortcomings such as flocculation bridge formation ability.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of preparation method of cationic dehydrating agent, when the product of preparation is used for the oily sludge processing, can remove the interstitial water in the mud effectively, the conglobation property of filter cake is good, thereby improves the dehydrating effect of mud.Use cationic dehydrating agent of the present invention to carry out sludge treatment, its filter back liquid COD is lower than 1000mg/L substantially, and oil-contg is below 100mg/L.
The cationic dehydrating agent of the present invention's preparation is the multipolymer of cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride and acrylamide monomer:
Contain structural unit A in the multipolymer:
With structural unit B:
The mol ratio of structural unit A and structural unit B is 30:1～1:30 in the multipolymer, preferred 25:1～1:25, the limiting viscosity 900cm of multipolymer
3/ g～1600cm
3/ g, cationic degree 0.3mmol/g～1.2mmol/g.
The preparation process of cationic dehydrating agent of the present invention is as follows:
In the required ratio of cationic dehydrating agent polymer monomers, acrylamide monomer and cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride monomer are added in the deionized water, nitrogen blowing is removed dissolved oxygen, adds initiator at last, auxiliary agent carries out polyreaction.After question response is complete,, promptly get this dewatering agent through extruding pelletization, drying, pulverizing.
The monomeric polymerization proportioning of acrylamide monomer and methylacryoyloxyethyl trimethyl ammonium chloride (mol ratio) is, acrylamide: methylacryoyloxyethyl trimethyl ammonium chloride=30:1～1:30 (mol ratio), best polymerization proportioning is: acrylamide: methylacryoyloxyethyl trimethyl ammonium chloride=25:1～1:25 (mol ratio); The total concn of monomer polymerization is: 0.5mol/L～5.0mol/L, and best polymerization concentration is: 0.8mol/L～4.5mol/L; The polymeric temperature of reaction is: 20 ℃～60 ℃, optimum temps is: 30 ℃～60 ℃; Polymerization reaction time is 1h～8h, preferably 3h～6h.
Polymerization process adopts different initiator systems, carries out free radical copolymerization.Initiator is one or both of water-soluble azo initiator and redox initiator.The add-on of initiator is 10
-5Mol/L～10
-2Mol/L, optimal addn is: 5 * 10
-5Mol/L～5 * 10
-3Mol/L.Redox initiator is one or both of persulphate and sulphite, and wherein, the proportioning of persulphate and sulphite is: 1:0.1～1 (weight ratio), best proportioning are 1:0.5～1 (weight ratio).Wherein persulphate is one or more in Potassium Persulphate, ammonium persulphate and the Sodium Persulfate; Sulphite is one or more in S-WAT, sodium bisulfite, potassium sulfite, Potassium hydrogen sulfite, ammonium sulphite and the ammonium bisulfite; Water-soluble azo initiator is a water-soluble azo class thing, as N, and one or more in N-dihydroxy ethyl azo-bis-isobutyrate hydrochloride, the two amidine propane dihydrochlorides of azo, two (2-methyl, 2-amidine propane)-hydrochlorides of 2,2-azo.
Auxiliary agent is one or more of edta and its sodium salt, ethylene diaminetetraacetic acid and sodium salt thereof, diethylenediamine pentaacetic acid and sodium salt thereof.The add-on of auxiliary agent is 10 of a polymerization single polymerization monomer total amount
-5G/g～10
-2G/g.
The polyreaction of sludge dehydrating agent preparation process of the present invention is controlled easily, and is easy and simple to handle, and the reaction times is shorter, and whole technological process only needs 6h～8h to finish.When particularly adopting persulphate and sulphite composite initiator, can carry out polyreaction under lower temperature, polymerization process is easy to control.This cationic dehydrating agent can be applied in sewage, the sludge treatment of industries such as oil, petrochemical industry, chemical industry, light industry.Sludge dehydrating agent of the present invention can be removed the interstitial water in the mud effectively when handling various sludge dewatering treatment, the conglobation property of filter cake is good, thereby improves the dehydrating effect of mud.Use cationic dehydrating agent of the present invention to carry out sludge treatment, its filter back liquid COD is lower than 1000mg/L substantially, and oil-contg is below 100mg/L.
Embodiment
Further specify the preparation method and the result of use of sludge dehydrating agent of the present invention below in conjunction with embodiment.
Embodiment 1
To be equipped with in the four-hole boiling flask of 1000ml of thermometer, filling tube, import and export of nitrogen, add acrylamide monomer 116.3g, cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride 44.6g, disodium ethylene diamine tetraacetate (chemical pure) 0.45g, deionized water 500ml, nitrogen blowing is removed dissolved oxygen, adds N at last, N-dihydroxy ethyl azo-bis-isobutyrate hydrochloride initiator 10
-4Mol/L adds ammonium persulphate (chemical pure) 0.3g, and sodium bisulfite (chemical pure) 0.3g in 40 ℃ of water-baths, carried out copolymerization 4 hours.Question response with its extruding pelletization, drying, pulverizing, promptly gets dewatering agent-1 after finishing.
Embodiment 2
To be equipped with in the four-hole boiling flask of 1000ml of thermometer, filling tube, import and export of nitrogen, add acrylamide monomer 96.9g, cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride 33.8g, disodium ethylene diamine tetraacetate (chemical pure) 0.38g, deionized water 500ml, nitrogen blowing is removed dissolved oxygen, adds N at last, N-dihydroxy ethyl azo-bis-isobutyrate hydrochloride initiator 5 * 10
-4Mol/L adds ammonium persulphate (chemical pure) 0.5g, and sodium bisulfite (chemical pure) 0.4g in 35 ℃ of water-baths, carried out copolymerization 6 hours.Question response with its extruding pelletization, drying, pulverizing, promptly gets dewatering agent-2 after finishing.
Embodiment 3
To be equipped with in the four-hole boiling flask of 1000ml of thermometer, filling tube, import and export of nitrogen, add acrylamide monomer 131.3g, cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride 25.3g, disodium ethylene diamine tetraacetate (chemical pure) 0.55g, deionized water 500ml, nitrogen blowing is removed dissolved oxygen, adds N at last, N-dihydroxy ethyl azo-bis-isobutyrate hydrochloride initiator 10
-4Mol/L adds ammonium persulphate (chemical pure) 0.35g, in 55 ℃ of water-baths, carries out copolymerization 5 hours.Question response with its extruding pelletization, drying, pulverizing, promptly gets dewatering agent-3 after finishing.
Embodiment 4
To be equipped with in the four-hole boiling flask of 1000ml of thermometer, filling tube, import and export of nitrogen, add acrylamide monomer 87.5g, cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride 18.5g, disodium ethylene diamine tetraacetate (chemical pure) 0.4g, deionized water 500ml, nitrogen blowing is removed dissolved oxygen, add ammonium persulphate (chemical pure) 0.6g at last, sodium bisulfite (chemical pure) 0.5g in 30 ℃ of water-baths, carried out copolymerization 5 hours.Question response with its extruding pelletization, drying, pulverizing, promptly gets dewatering agent-4 after finishing.
Embodiment 5
To be equipped with in the four-hole boiling flask of 1000ml of thermometer, filling tube, import and export of nitrogen, add acrylamide monomer 16.5g, cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride 118.5g, disodium ethylene diamine tetraacetate (chemical pure) 0.4g, deionized water 500ml, nitrogen blowing is removed dissolved oxygen, adds N at last, N-dihydroxy ethyl azo-bis-isobutyrate hydrochloride initiator 5 * 10
-4Mol/L, ammonium persulphate (chemical pure) 0.3g, sodium bisulfite (chemical pure) 0.25g in 50 ℃ of water-baths, carried out copolymerization 5 hours.Question response with its extruding pelletization, drying, pulverizing, promptly gets dewatering agent-5 after finishing.
Each embodiment obtains dewatering agent product index such as table 1.
Each embodiment of table 1 obtains the dewatering agent product index
| Index | Dewatering agent-1 | Dewatering agent-2 | Dewatering agent-3 | Dewatering agent-4 | Dewatering agent-5 |
| Limiting viscosity cm 3/g | 1590 | 1475 | 1195 | 1420 | 968 |
| Cationic degree mmol/g | 0.32 | 0.71 | 0.44 | 0.86 | 0.95 |
Embodiment 6
Get certain refinery oily sludge and carry out the breakdown of emulsion floc test.
Table 2 is handled certain refinery oily sludge laboratory evaluation result
Annotate: ZDMC is the multipolymer of acrylamide and dimethyl diallyl ammonium chloride, limiting viscosity 430mm
2/ s, cationic degree 0.3mmol/g.
Claims (11)
1, a kind of preparation method of cationic dehydrating agent, its feature comprises following process in preparation process: in the required ratio of cationic dehydrating agent polymer monomers, acrylamide monomer and cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride monomer are added in the deionized water, nitrogen blowing is removed dissolved oxygen, adds initiator at last, auxiliary agent carries out polyreaction; After question response is complete,, promptly get dewatering agent through extruding pelletization, drying, pulverizing; The monomeric polymerization mol ratio of described acrylamide monomer and cationic monomer methylacryoyloxyethyl trimethyl ammonium chloride is acrylamide: methylacryoyloxyethyl trimethyl ammonium chloride=30:1～1:30; Described initiator is water-soluble azo initiator and redox initiator.
2, in accordance with the method for claim 1, it is characterized in that described monomeric total concn is: 0.5mol/L～5.0mol/L.
3, in accordance with the method for claim 1, it is characterized in that described monomeric total concn is 0.8mol/L～4.5mol/L.
4, in accordance with the method for claim 1, it is characterized in that the polymeric temperature of reaction is: 20 ℃～60 ℃, polymerization reaction time is 1h～8h.
5, in accordance with the method for claim 1, the add-on that it is characterized in that described initiator is 10
-5Mol/L～10
-2Mol/L.
6, in accordance with the method for claim 1, it is characterized in that described redox initiator is one or both of persulphate and sulphite.
7, in accordance with the method for claim 6, it is characterized in that described persulphate is one or more in Potassium Persulphate, ammonium persulphate and the Sodium Persulfate; Sulphite is one or more in S-WAT, sodium bisulfite, potassium sulfite, Potassium hydrogen sulfite, ammonium sulphite and the ammonium bisulfite.
8, in accordance with the method for claim 1, it is characterized in that described water-soluble azo initiator is a water-soluble azo class thing.
9, in accordance with the method for claim 1, it is characterized in that described initiator add-on is: 5 * 10
-5Mol/L～5 * 10
-3Mol/L.
10, in accordance with the method for claim 1, it is characterized in that described auxiliary agent is one or more of edta and its sodium salt, ethylene diaminetetraacetic acid and sodium salt thereof, diethylenediamine pentaacetic acid and sodium salt thereof, the add-on of auxiliary agent is 10 of a polymerization single polymerization monomer total amount
-5G/g～10
-2G/g.
11, in accordance with the method for claim 6, the weight ratio that it is characterized in that described persulphate and sulphite is: 1:0.1～1.
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|---|---|---|---|
| CNB2005100475425A CN100497415C (en) | 2005-10-26 | 2005-10-26 | Cationic dehydrating agent preparation method |
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|---|---|---|---|
| CNB2005100475425A CN100497415C (en) | 2005-10-26 | 2005-10-26 | Cationic dehydrating agent preparation method |
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| Publication Number | Publication Date |
|---|---|
| CN1955125A CN1955125A (en) | 2007-05-02 |
| CN100497415C true CN100497415C (en) | 2009-06-10 |
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108654143A (en) * | 2018-07-11 | 2018-10-16 | 四川浩珑科技有限公司 | A kind of refinery oily waste water degreaser and preparation method thereof |
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| CN101522581B (en) * | 2006-10-24 | 2012-06-13 | Mt奥科高分子株式会社 | Processes for dewatering digested sewage sludge |
| CN101130938B (en) * | 2007-09-28 | 2010-05-19 | 上海东升新材料有限公司 | Cationic polymer for papermaking and preparing method thereof |
| CN102502705B (en) * | 2011-11-02 | 2013-06-19 | 四川鸿康药物化学有限公司 | Ammonium chloride fluid loss agent and preparation method thereof |
| CN102898580B (en) * | 2012-10-29 | 2014-10-29 | 余荣和 | Method for preparing polyacrylamide |
| CN105084711A (en) * | 2014-04-25 | 2015-11-25 | 索里思科技开曼公司 | Sludge dewatering |
| JP6737439B2 (en) * | 2017-03-14 | 2020-08-12 | 栗田工業株式会社 | Sludge dewatering agent and sludge dewatering method |
| CN109970313A (en) * | 2017-12-14 | 2019-07-05 | 湖南军信环保股份有限公司 | For the dehydrating and conditioning agent of thermophilic digestion sludge and the dewatering of thermophilic digestion sludge |
| CN108640484B (en) * | 2018-05-31 | 2020-12-22 | 东莞市顶盛环保科技有限公司 | Preparation method of sludge dehydrating agent |
| CN112759228A (en) * | 2020-12-29 | 2021-05-07 | 上海丰信环保科技有限公司 | Special compound polymer agent for dehydration of oily sludge of meal waste water |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654143A (en) * | 2018-07-11 | 2018-10-16 | 四川浩珑科技有限公司 | A kind of refinery oily waste water degreaser and preparation method thereof |
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