CN103724443B - A kind of preparation method of hydrophobically modified xanthan - Google Patents
A kind of preparation method of hydrophobically modified xanthan Download PDFInfo
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- GJCOSYZMQJWQCA-UHFFFAOYSA-N 9H-xanthene Chemical class C1=CC=C2CC3=CC=CC=C3OC2=C1 GJCOSYZMQJWQCA-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229920001285 xanthan gum Polymers 0.000 claims abstract description 43
- 239000000230 xanthan gum Substances 0.000 claims abstract description 41
- 229940082509 xanthan gum Drugs 0.000 claims abstract description 41
- 235000010493 xanthan gum Nutrition 0.000 claims abstract description 41
- 150000001335 aliphatic alkanes Chemical class 0.000 claims abstract description 18
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 16
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229940063953 ammonium lauryl sulfate Drugs 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000012046 mixed solvent Substances 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 6
- KOFZTCSTGIWCQG-UHFFFAOYSA-N 1-bromotetradecane Chemical compound CCCCCCCCCCCCCCBr KOFZTCSTGIWCQG-UHFFFAOYSA-N 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
- XTUSEBKMEQERQV-UHFFFAOYSA-N propan-2-ol;hydrate Chemical compound O.CC(C)O XTUSEBKMEQERQV-UHFFFAOYSA-N 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- HNTGIJLWHDPAFN-UHFFFAOYSA-N 1-bromohexadecane Chemical compound CCCCCCCCCCCCCCCCBr HNTGIJLWHDPAFN-UHFFFAOYSA-N 0.000 claims description 2
- WSULSMOGMLRGKU-UHFFFAOYSA-N 1-bromooctadecane Chemical compound CCCCCCCCCCCCCCCCCCBr WSULSMOGMLRGKU-UHFFFAOYSA-N 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 150000003839 salts Chemical class 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 230000004048 modification Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 239000003995 emulsifying agent Substances 0.000 abstract description 2
- 239000011259 mixed solution Substances 0.000 abstract description 2
- 239000000178 monomer Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 230000035484 reaction time Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000015784 hyperosmotic salinity response Effects 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- PBLNBZIONSLZBU-UHFFFAOYSA-N 1-bromododecane Chemical compound CCCCCCCCCCCCBr PBLNBZIONSLZBU-UHFFFAOYSA-N 0.000 description 1
- LCTONWCANYUPML-UHFFFAOYSA-N Pyruvic acid Chemical group CC(=O)C(O)=O LCTONWCANYUPML-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012675 alcoholic extract Substances 0.000 description 1
- 238000005904 alkaline hydrolysis reaction Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- KCXMKQUNVWSEMD-UHFFFAOYSA-N benzyl chloride Chemical compound ClCC1=CC=CC=C1 KCXMKQUNVWSEMD-UHFFFAOYSA-N 0.000 description 1
- 125000001246 bromo group Chemical group Br* 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- HRYZWHHZPQKTII-UHFFFAOYSA-N chloroethane Chemical compound CCCl HRYZWHHZPQKTII-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229960004756 ethanol Drugs 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- HZVOZRGWRWCICA-UHFFFAOYSA-N methanediyl Chemical compound [CH2] HZVOZRGWRWCICA-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000001370 static light scattering Methods 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 229940126680 traditional chinese medicines Drugs 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Abstract
The present invention relates to a kind of preparation method of hydrophobically modified xanthan.The method for solvent, is emulsifying agent with ammonium lauryl sulfate with water/Virahol mixed solution, is that etherifying agent obtains hydrophobically modified xanthan in 30 ~ 120 DEG C of temperature, pH6 ~ 9 time reaction to xanthan gum modification with brominated alkanes.This synthetic reaction condition is gentle, raw material is easy to get, and monomer conversion is high, and product process is convenient.Xanthan gum after hydrophobically modified still has higher viscosity when having lower molecular weight, has good salt resistance, good degradability, is convenient to carry out follow-up sewage disposal, has good environment affinity; The oil recovery being applicable to high salinity reservoir is produced.
Description
Technical field
The present invention relates to a kind of preparation method of hydrophobically modified xanthan, belong to polymer chemistry and polymer modification technology field.
Background technology
Xanthan gum be collect thickening, suspension, emulsification in the world at present, be stable at one, the xanthan gum that best performance is got over.The molecular side chain end of xanthan gum contains the number of pyruvic acid group, has a significant impact its performance.Xanthan gum has the general property of long chain macromolecule, but it contains more functional group than general polymer, can show special performance under given conditions.Its conformation is in aqueous various, shows different characteristics under different condition.
Current xanthan gum is widely used in tertiary oil recovery.The viscosity of xanthan gum solution can not variation with temperature and changing a lot, can viscosity B coefficent be there is because of heating in general polysaccharide, but the aqueous solution of xanthan gum viscosity between 10 ~ 80 DEG C has almost no change, even if the aqueous solution of lower concentration still demonstrates stable high viscosity in wide temperature range.But its salt resistance is poor relative to temperature tolerance.In order to improve the salt resistance of xanthan gum, Chinese patent document CN102134283A discloses a kind of preparation method of association type modified xantham gum, and its properties-correcting agent is the hydrochloric ether (benzyl chlorine) containing phenyl ring, because it contains benzene ring structure, easily causes huge pollution to environment; Another deficiency of this technology be gained hydrophobic association type xanthan gum for recover the oil under a subterranean formation high temperature ageing after 90 days viscosity still up to 156mPas, concerning oil Produced Liquid, due to its high viscosity, make the waste water of generation be difficult to process, the environmental protection treatment cost of waste water is higher.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of preparation method of hydrophobically modified xanthan.
Technical solution of the present invention is as follows:
A preparation for hydrophobically modified xanthan, comprises step as follows:
(1) water/isopropyl alcohol mixed solvent is prepared, Qi Zhongshui: mass ratio=1:1 ~ 18 of Virahol.
(2) added by ammonium lauryl sulfate in the water-isopropyl alcohol mixed solvent of step (1), stirred at ambient temperature dissolves, and stir logical nitrogen 10 ~ 20min, ammonium lauryl sulfate is 0.5 ~ 15wt% of mixed solvent quality;
(3) add brominated alkanes to the system that step (2) is obtained, stirred at ambient temperature is to dissolving, and brominated alkanes feed ratio is 1 ~ 35wt% of mixed solvent quality, and described brominated alkanes is the C12 ~ C20 long chain alkane containing end bromo;
(4) add sodium hydroxide to the system that step (3) is obtained, stirred at ambient temperature is to dissolving, and sodium hydroxide feed ratio is 40 ~ 140mol% mol ratio of brominated alkanes; The pH of system is made to be 6 ~ 9;
(5) add xanthan gum to the system that step (4) is obtained, stirring at room temperature is logical nitrogen 5 ~ 8min after dissolving, and xanthan gum add-on accounts for 2.5 ~ 60wt% of mixed solvent quality;
(6) system obtained for step (5) is reacted 2 ~ 48h at 30 ~ 120 DEG C, obtain hydrophobically modified xanthan.
Preferably, in the water-isopropyl alcohol mixed solvent of above-mentioned steps (1), water: mass ratio=1:2 ~ 8 of Virahol, further preferably water: mass ratio=1:3 ~ 5 of Virahol.
Preferably, in above-mentioned steps (2), ammonium lauryl sulfate consumption is 0.5 ~ 1.0wt% of mixed solvent quality, more preferably 0.7 ~ 0.8wt%.Preferably, ammonium lauryl sulfate adds with the solution form that mass concentration is 20 ~ 35wt%.
Preferably, in above-mentioned steps (3), brominated alkanes feed ratio is 5 ~ 20wt% of mixed solvent quality, and preferably this feed ratio is 10 ~ 15wt% further.
Preferably, in above-mentioned steps (3), brominated alkanes is selected from bromododecane, bromotetradecane, bromohexadecane or bromo-octadecane etc.
Preferably, in above-mentioned steps (4), sodium hydroxide feed ratio is 80 ~ 100mol% mol ratio of brominated alkanes, system pH=7.5 ~ 8.5; .Described sodium hydroxide adds with solid form.
Preferably, in above-mentioned steps (5), xanthan gum add-on accounts for 15 ~ 40wt% of mixed solvent quality, more preferably 25 ~ 30wt%.
Preferably, in above-mentioned steps (6), temperature of reaction is 50 ~ 90 DEG C; Optimal reaction temperature is 70 DEG C.
In above-mentioned steps (6), the reaction times determines according to conditions such as xanthan gum add-on, etherifying agent concentration, temperature, pH in modified system, and under above-mentioned optimum condition, the modified-reaction time is 5 ~ 8 hours, and the best modified-reaction time is 7h.
Modified xantham gum obtained in above-mentioned steps (6) is faint yellow glutinous solution, carries out aftertreatment further: pour in dehydrated alcohol, be settled out solid, washing with alcohol, dry, pulverize, and obtains hydrophobically modified xanthan powder.
In the inventive method, the molecular-weight average adopting xanthan gum is 750 ~ 8,000,000; Gained hydrophobically modified xanthan molecular-weight average is 100 ~ 6,100,000, significantly reduces the molecular weight of xanthan gum.
It is relevant, general that Molecular Weight of Xanthan Gum reduces degree and temperature, pH, reaction times, and temperature is higher, pH is larger, the reaction times is longer, then molecular weight reduction degree is larger.In these influence factors, pH has the greatest impact, and when NaOH and brominated alkanes molar ratio are less than 1, it is 20 ~ 30% that Molecular Weight of Xanthan Gum reduces degree; When NaOH and brominated alkanes molar ratio equal 1, it is about 30 ~ 50% that molecular weight reduces degree; When NaOH and brominated alkanes molar ratio are greater than 1, it is about 60 ~ 80% that molecular weight reduces degree.According to the needs of practical application, the hydrophobically modified xanthan that above-mentioned processing condition obtain required molecular weight ranges can be controlled.
In the inventive method, with water/Virahol mixed solution for solvent, being emulsifying agent with ammonium lauryl sulfate, is that etherifying agent obtains hydrophobically modified xanthan to xanthan gum modification under certain temperature, pH with brominated alkanes.Xanthan gum after hydrophobically modified of the present invention still has higher viscosity when having lower molecular weight, has good salt resistance, and has good degradability, is convenient to carry out follow-up sewage disposal, has good environment affinity.Compared with the prior art, main advantage is in the present invention:
1. hydrophobically modified xanthan has good salt tolerance, is applicable to high salinity reservoir.
2. hydrophobically modified xanthan has degradability, and composition environmentally safe, be a kind of environment-friendly materials.
3. raw material is easy to get, and synthesis is simple, and productive rate is high, use safety, and it is convenient to store.
4. reaction conditions is gentle, and monomer conversion is high, and product aftertreatment is simple, and ethanol is with low cost, nontoxic, easily reclaims.
Accompanying drawing explanation
Fig. 1 is the infrared spectra of gained hydrophobically modified xanthan in embodiment 1, and Fig. 2 is the nuclear magnetic spectrum of gained hydrophobically modified xanthan in embodiment 1.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but institute of the present invention protection domain is not limited thereto.In embodiment, Virahol, sodium hydroxide, dehydrated alcohol are all purchased from chemical reagents corporation of traditional Chinese medicines group, are analytical pure.Ammonium lauryl sulfate purchased from Sinolight Chemical Co., Ltd., chemical pure.Purchased from ladder is uncommon, xanthan gum likes that (Shanghai) changes into industrial development company limited, chemical pure, molecular-weight average is 760 ~ 7,800,000.Room temperature of the present invention has implication well known in the art.
Embodiment 1
Under stirring at room temperature condition, in 8g water/Virahol (1:4 mass ratio) mixed solvent, add 0.192g, mass concentration 30% ammonium lauryl sulfate solution, logical N
2after bubbling 15min, then add 1g bromotetradecane and 0.15g solid sodium hydroxide successively, then add 4g xanthan gum (active constituent content is 89.1%), continue logical N
2bubbling 5min.70 DEG C of isothermal reactions 7 hours.Gained reaction solution is poured in dehydrated alcohol, is settled out solid, solid product 90wt% aqueous ethanolic solution washing of precipitate 3 times, suction filtration, freeze-day with constant temperature 72h at 30 DEG C.Obtain 3.89g hydrophobically modified xanthan.Through static light scattering test, its molecular weight is 6,060,000.The infrared spectra of gained hydrophobically modified xanthan as shown in Figure 1,3600-3000cm in Fig. 1
-1for-OH the vibration peak on sugared ring; 2890cm
-1place is the-CH vibration peak on methyl, methylene radical; The carboxyl vibration peak of xanthan gum has two kinds of forms, is respectively 1730cm
-1(-COOH) and 1620cm
-1(-COO
-na
+), because add a large amount of solid NaOH during modification, so the carboxyl in hydrophobically modified xanthan is only at 1620cm
-1place goes out peak; 1020cm for xanthan gum
-1place is the stretching vibration of ehter bond in sugared toroidal molecule, 1020cm for MXG
-1place is the stretching vibration of ehter bond in sugared toroidal molecule and newly-generated ehter bond.Because etherification reaction adds ehter bond, decrease alcoholic extract hydroxyl group ,-OH the vibration weakening in MXG, ehter bond vibration strengthens simultaneously, and xanthan gum modification success is described.
Carry out anti-salt test to xanthan gum after before modified, used salt is NaCl and MgCl
2.The xanthan gum of 2g/L and modified xanthan gum are dissolved in respectively in the salt of different concns and carry out viscosity test, probe temperature is 25 DEG C, and shearing rate is 7.34s
-1.Result as shown in Table 1 and Table 2.
Table 1 is rear xanthan gum NaCl medium viscosity before modified
As shown in Table 1, modified xanthan gum pure water medium viscosity will lower than before modified, this is because in modifying process, xanthan gum there occurs alkaline hydrolysis, and its molecular weight greatly reduces.But in salt solution, modified xanthan gum constantly increases along with its viscosity of increase of salt concn, and final viscosity has exceeded the xanthan gum of comparable sodium.This shows, after hydrophobically modified, xanthan gum salt tolerance improves greatly.And due to its molecular weight lower, for oil field mining liquid, its intractability is corresponding reduction also
Table 2 is rear xanthan gum MgCl before modified
2medium viscosity
As shown in Table 1, at MgCl
2in, modified xanthan gum constantly increases along with its viscosity of increase of salt concn, and final viscosity have also exceeded the xanthan gum of comparable sodium.
Embodiment 2
As described in Example 1, difference is the add-on of xanthan gum is 2g, obtains 1.87g hydrophobically modified xanthan.
Embodiment 3
As described in Example 1, difference is the add-on of bromotetradecane is 0.5g, obtains 3.87g hydrophobically modified xanthan.
Embodiment 4
As described in Example 1, difference is the add-on of sodium hydroxide is 0.5g, obtains 1.80g hydrophobically modified xanthan.
Embodiment 5
As described in Example 2, difference is the add-on of bromotetradecane is 1g, obtains 2.17g hydrophobically modified xanthan.
Embodiment 6
As described in Example 1, difference is temperature of reaction is 50 DEG C, isothermal reaction 8 hours.Obtain 4.03g hydrophobically modified xanthan.
Embodiment 7
As described in Example 1, the water/Virahol of difference to be mixed solvent be 12g, 1:7 mass ratio.Obtain 3.94g hydrophobically modified xanthan.
Claims (4)
1. a preparation method for hydrophobically modified xanthan, comprises step as follows:
(1) water/isopropyl alcohol mixed solvent is prepared, Qi Zhongshui: mass ratio=1:2 ~ 8 of Virahol;
(2) added by ammonium lauryl sulfate in the water-isopropyl alcohol mixed solvent of step (1), stirred at ambient temperature dissolves, and stir logical nitrogen 10 ~ 20min, ammonium lauryl sulfate is 0.5 ~ 1.0wt% of mixed solvent quality;
(3) add brominated alkanes to the system that step (2) is obtained, stirred at ambient temperature is to dissolving, and brominated alkanes feed ratio is 5 ~ 20wt% of mixed solvent quality, and described brominated alkanes is bromotetradecane, bromohexadecane or bromo-octadecane;
(4) add sodium hydroxide to the system that step (3) is obtained, stirred at ambient temperature is to dissolving, and sodium hydroxide feed ratio is 80 ~ 100mol% mol ratio of brominated alkanes, makes pH=7.5 ~ 8.5 of system;
(5) add xanthan gum to the system that step (4) is obtained, stirring at room temperature is logical nitrogen 5 ~ 8min after dissolving, and xanthan gum add-on accounts for 15 ~ 40wt% of mixed solvent quality;
(6) system obtained for step (5) is reacted 5 ~ 8 hours at 50 ~ 90 DEG C, obtain hydrophobically modified xanthan; Carry out aftertreatment further: pour in dehydrated alcohol, be settled out solid, washing with alcohol, to dry, pulverize, obtain hydrophobically modified xanthan powder.
2. the preparation method of hydrophobically modified xanthan as claimed in claim 1, is characterized in that in the water/isopropyl alcohol mixed solvent of step (1), water: mass ratio=1:3 ~ 5 of Virahol.
3. the preparation method of hydrophobically modified xanthan as claimed in claim 1, is characterized in that, in step (2), ammonium lauryl sulfate consumption is 0.7 ~ 0.8wt% of mixed solvent quality.
4. the preparation method of hydrophobically modified xanthan as claimed in claim 1, is characterized in that, in step (3), brominated alkanes feed ratio is 10 ~ 15wt% of mixed solvent quality.
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| CN104151442B (en) * | 2014-08-01 | 2016-04-06 | 中国海洋石油总公司 | Xanthan gum of a kind of surface hydrophobicity modification and preparation method thereof |
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| CN104761653B (en) * | 2015-03-30 | 2017-01-25 | 中国海洋石油总公司 | Hydrophobic association water-soluble xanthan gum and preparation method and application thereof |
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| US5387675A (en) * | 1993-03-10 | 1995-02-07 | Rhone-Poulenc Specialty Chemicals Co. | Modified hydrophobic cationic thickening compositions |
| CN102134283A (en) * | 2010-12-20 | 2011-07-27 | 成都理工大学 | Preparation method of associated modified xanthan gum |
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2013
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5387675A (en) * | 1993-03-10 | 1995-02-07 | Rhone-Poulenc Specialty Chemicals Co. | Modified hydrophobic cationic thickening compositions |
| CN102134283A (en) * | 2010-12-20 | 2011-07-27 | 成都理工大学 | Preparation method of associated modified xanthan gum |
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| Title |
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| "疏水缔合改性羟丙基瓜尔胶的合成工艺";赵修太等;《精细石油化工》;20110118;第28卷(第1期);第41-45页 * |
| "黄原胶的化学改性及其性能和结构的研究";王世高;《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》;20120415(第4期);B014-288 * |
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| CN103724443A (en) | 2014-04-16 |
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Denomination of invention: A preparation method for hydrophobic modified xanthan gum Effective date of registration: 20231221 Granted publication date: 20160406 Pledgee: Shandong Haiyang Rural Commercial Bank Co.,Ltd. Pledgor: Yantai Dongfang Shenzhou Biotechnology Co.,Ltd. Registration number: Y2023980073164 |