CN103044291B - Technique for preparation of alkyl diarene sulfonate - Google Patents
Technique for preparation of alkyl diarene sulfonate Download PDFInfo
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- CN103044291B CN103044291B CN201310012237.7A CN201310012237A CN103044291B CN 103044291 B CN103044291 B CN 103044291B CN 201310012237 A CN201310012237 A CN 201310012237A CN 103044291 B CN103044291 B CN 103044291B
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Abstract
The invention discloses a technique for preparation of alkyl diarene sulfonate, and the technique comprises the following steps of: adding a catalyst, diarene and fatty alcohol in a reactor; thermally leaching the reactant liquid after reaction, decompressing and distilling the filtrate to obtain a mixture consisting of monoalkyl diarene and dialkyl diarene; decompressing and distilling the filtrate again at high temperature and high vacuum degree to obtain monoalkyl diarene; adding alkane in the monoalkyl diarene or in the mixture consisting of monoalkyl diarene and dialkyl diarene, and adding fuming sulphuric acid for reaction when the temperature is increased to 30-50 DEG C by heating; then adding water solution of alkaline to neutralize the solution until PH is 6-8; removing the solvent by means of vaporization to obtain alkyl diarene mono-sulfonate; adding a solvent in the monoalkyl diarene or in the mixture consisting of monoalkyl diarene and dialkyl diarene, adding a sulfonating agent for reaction after the temperature is increased to 30-80 DEG C by heating, and then adding water solution of alkaline to neutralize the solution until PH is 6-8; and at last removing the solvent by means of vaporization to obtain a mixture of alkyl diarene mono-sulfonate and alkyl diarene disulfonate or alkyl diarene disulfonate. The technique disclosed by the invention has the advantages of being simple and convenient, easy to realize industrialization and safe to people and environment.
Description
Technical field
The invention belongs to a kind of technique of preparing sulfonate, relate in particular to a kind of technique of preparing alkyl two arene sulfonates with fatty alcohol and two aromatic hydrocarbons.
Background technology
The most frequently used tensio-active agent of tertiary oil recovery is mainly sulfonated petro-leum and heavy alkylbenzene sulfonate at present, the two is complicated mixture, product forms the impact that is subject to the factors such as raw material sources, technique, stability is poor, and temperature resistant antisalt is poor, after composite with nonionogenic tenside, can improve salt tolerance, but combination flooding chromatographic separation phenomenon is serious, causes oil displacement efficiency to decline.Therefore, need exploitation to be applicable to the sulfonate type anion surfactant of the novel texture of tertiary oil recovery.
Alkyl two arene sulfonates are generally to carry out alkylated reaction synthesis of alkyl two aromatic hydrocarbons by the alkylating agents such as halohydrocarbon or alkene, fatty alcohol and two aromatic hydrocarbons, then carry out sulfonation with sulphonating agent, the sulfonate type anion surfactant obtaining with alkali neutralization afterwards.Wherein, alkylating agent and of crucial importance with the selection of catalyzer while preparing alkyl two aromatic hydrocarbons intermediate, this is the principal element that affects alkyl two arene sulfonate surfactant product quality and costs.Pertinent literature report mainly contains: 1. take alpha-olefin as alkylating agent and ditane are at anhydrous AlCl
3under catalysis, obtain two alkyl diphenyl methane, then react with chlorsulfonic acid obtain pair alkyl diphenyl methane disulfonates (in great waves, Hu Longjiang etc., Daqing Petroleum Institute's journal, 2004,28 (1): 35-38); 2. by 1-haloalkane and 1,2-diphenylethane at anhydrous AlCl
3under catalysis, obtain alkyl diphenyl ethane, then with oleum, carry out sulfonation and obtain two alkyl diphenyl ethane sulfonates (Cui Yingjun, Hebei University of Technology's Master's thesis, 2007).In addition; by long-chain fat acyl chlorides and two aromatic hydrocarbons, under catalyst action, first carry out acylation reaction and generate two acyl group ditanes; through Clemmensen reduction, become two alkyl two aromatic hydrocarbons; through sulfonation, neutralization, can make two straight chained alkyl two aromatic hydrocarbons disulfonate Gemini tensio-active agents again; but this technique is too complicated; be difficult for realizing industrialization, do not belong to the scope that the present invention inquires into.
In existing alkyl two arene sulfonate preparation technologies, there is following problem:
(1), while adopting halohydrocarbon to be raw material synthesis of alkyl two aromatic hydrocarbons, can produce HCl in process of production, to human and environment poor stability, serious to equipment corrosion.
(2) while adopting alkene to be raw material synthesis of alkyl two aromatic hydrocarbons, alkene derives from non-renewable petroleum resources, do not meet the fundamental state policy of green, recycling economy, moreover at present domestic alkene is mainly by external import, price is high, originate limited, therefore, from the angle of national energy security, consider, alkene is unsuitable for the main raw material as tertiary oil recovery.
(3) in alkylated reaction, conventional catalyzer is mainly an acidic catalysts such as the vitriol oil, hydrofluoric acid and aluminum chloride, serious to the harm of environment, is difficult for and raw material and product separation etching apparatus.
(4) while making alkylating agent with haloalkane, alpha-olefin, product composition is complicated, and in alkylate, polysubstituted thing content and polymer content are higher, need under high temperature high vacuum, distill out monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons, and energy consumption is high, and facility investment is large.
Summary of the invention
The object of this invention is to provide a kind of simple process, be easy to realize industrialization, to people and environmental safety, the technique of preparing alkyl two arene sulfonates that energy consumption is low.
The present invention is a kind of technique of preparing alkyl two arene sulfonates, and concrete operation step is as follows:
(1) in reactor, add catalyzer, two aromatic hydrocarbons, fatty alcohol, catalyst levels is 5%～50% of fatty alcohol and two aromatic hydrocarbons total masses, the mol ratio of two aromatic hydrocarbons and fatty alcohol is 0.2～5:1, after 100 ℃～200 ℃ reaction 10～200min, hot suction filtration reaction solution, filtrate is carried out to underpressure distillation to remove unreacted two aromatic hydrocarbons and fatty alcohol, bottoms is the mixture that monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form, this intermediate product can be directly used in sulfonation, also can under high temperature condition of high vacuum degree, to bottoms, carry out underpressure distillation obtains carrying out sulfonation after monoalkyl two aromatic hydrocarbons again,
(2) in reactor, add mixture that monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form or monoalkyl two aromatic hydrocarbons, alkane, start and stir, while being heated to 30 ℃～50 ℃, add oleum, the mixture that oleum and monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form or the mol ratio of monoalkyl two aromatic hydrocarbons are 1～1.1:1, reaction times 30～60min, add again the aqueous solution of alkali to be neutralized to PH 6～8, the mass concentration of the aqueous solution of alkali is 20～50%, boils off solvent and obtains alkyl two aromatic hydrocarbons monosulfonates;
(3) mixture or monoalkyl two aromatic hydrocarbons that in reactor, add monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons to form, solvent, start and stir, while being heated to 30 ℃～80 ℃, add sulphonating agent, the mixture that sulphonating agent and monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form or the mol ratio of monoalkyl two aromatic hydrocarbons are 1.5～3.0:1, reaction times 30～90min, add again the aqueous solution of alkali to be neutralized to PH 6～8, the mass concentration of the aqueous solution of alkali is 20～50%, boil off mixture or alkyl two aromatic hydrocarbons disulfonates that solvent obtains alkyl two aromatic hydrocarbons monosulfonates and alkyl two aromatic hydrocarbons disulfonates.
Fatty alcohol as above is R
3-OH, R
3for C
8～C
18straight or branched alkyl.
Two aromatic hydrocarbons as above are Ar-X
1-Ar, X
1for C
0～C
12straight or branched alkyl, Ar is aromatic hydrocarbons, as benzene or naphthalene.
Catalyzer as above is one or more compositions in atlapulgite and sulfuric acid, tosic acid or thionamic acid, and the composite catalyst obtaining through dipping, roasting, wherein atlapulgite is Primary Catalysts, sulfuric acid, tosic acid or thionamic acid are promotor, and the consumption of promotor is 5～30% of Primary Catalysts quality.
The concrete preparation method of composite catalyst as above is: the aqueous solution of atlapulgite and promotor is at room temperature stirred to 6～24h, and suction filtration, filter cake is dried to constant weight at 150～300 ℃, by dried filter cake porphyrize, obtains composite catalyst.
The mass concentration of the aqueous solution of promotor as above is not restricted, adjustable amount of water, atlapulgite is all soaked and the liquid level of the aqueous solution higher than atlapulgite.
As above to filtrate carry out underpressure distillation take the actual conditions of removing unreacting material as: under 1～2.5 Kpa pressure, to the filtrate distilled that reduces pressure, steam≤front-end volatiles of 200 ℃, this cut can add to and in reactor, carry out reuse.
As abovely under high temperature condition of high vacuum degree, bottoms is carried out to the actual conditions that underpressure distillation obtains monoalkyl two aromatic hydrocarbons and be: under 0.1～0.5 Kpa pressure, to the bottoms distilled that reduces pressure, collect the cut of 250 ~ 290 ℃.
Alkane as above is C
6～C
20alkane, comprises normal paraffin, isoparaffin, branched paraffin, naphthenic hydrocarbon etc.
Solvent as above is halohydrocarbon, comprises methylene dichloride, ethylene dichloride, trichloromethane etc.
Sulphonating agent as above can be oleum, sulfan or gas sulphur trioxide.
Alkali as above is the organic basess such as the mineral alkalis such as sodium hydroxide, potassium hydroxide, ammonium hydroxide (ammoniacal liquor) and monoethanolamine, diethanolamine, trolamine.
The skeleton symbol of alkyl two arene sulfonates prepared by the present invention is as follows:
R wherein
1for C
8～C
18straight or branched alkyl, R
2for H or and R
1identical alkyl, M is sodium, potassium, ammonium, monoethanolamine, diethanolamine, trolamine positively charged ion.
Compare with the existing alkyl two arene sulfonate techniques of preparing, the present invention prepares alkyl two aryl sulfonate techniques and has the following advantages:
(1) the alkyl two arene sulfonate techniques of preparing of the present invention be take fatty alcohol as alkylating reagent, raw material sources are in reproducible natural fats and oils, alkylate be take monoalkyl two aromatic hydrocarbons as main, many alkyl substituent and polymer content are extremely low, need under high temperature high vacuum, not distill out single, double alkyl two aromatic hydrocarbons, energy consumption is low, and facility investment is little.
(2) in preparation technology of the present invention, adopt the composite catalyst prepare with atlapulgite and promotor, cost is low, is easy to separatedly with reaction system, and aftertreatment is simple, safe to human and environment, not etching apparatus.
(3) product that preparation technology of the present invention obtains can be the alkyl two arene sulfonate tensio-active agents of different alkyl length, different alkyl substitution value, different two sulphonation rates, product forms and performance can be adjusted according to the feature of different crude oils, good to the adaptability of crude oil, be conducive to improve different recovery ratio of driving piece crude oil.
Accompanying drawing explanation
Fig. 1 is the electrospray ionization mass spectrum figure of the single dodecyl ditane of embodiment 1 disulfonic acid sodium
Fig. 2 is the electrospray ionization mass spectrum figure of the single dodecyl diphenylethane of embodiment 2 disulfonic acid potassium
Fig. 3 is the electrospray ionization mass spectrum figure of the single dodecyl biphenyl of embodiment 3 disulfonic acid ammonium
Fig. 4 is the electrospray ionization mass spectrum figure of the single octyl group dinaphthylmethane of embodiment 4 sodium monosulfate and two octyl group dinaphthylmethane sodium monosulfates.
Embodiment
Embodiment 1:
In the reactor with thermometer, electric mixer, add atlapulgite and sulphur aqueous acid, the consumption of sulfuric acid is 5% of atlapulgite quality, under room temperature, stirs 6h, suction filtration, filter cake is directly dried to constant weight at 300 ℃, by dried filter cake porphyrize, obtains composite catalyst.
In the reactor with thermometer, electric mixer, add lauryl alcohol, ditane, catalyzer, the mol ratio of ditane and lauryl alcohol is 5:1, and catalyst levels is 5% of lauryl alcohol and ditane total mass.Open and stir and heat, 200 ℃ of temperature of reaction, reaction times 10min, hot suction filtration reaction solution, under 1.8Kpa pressure to the filtrate distilled that reduces pressure, steam≤the front-end volatiles of 200 ℃ are removed unreacted ditane and lauryl alcohol, afterwards again under 0.2 Kpa pressure to the bottoms distilled that reduces pressure, the cut of collecting 250 ~ 260 ℃ obtains intermediate product list dodecyl ditane.
In the reactor with thermometer, electric mixer, reflux condensing tube, add single dodecyl ditane and methylene chloride, unlatching drips sulfan, SO while being heated with stirring to 30 ℃
3with the mol ratio of single dodecyl ditane be 2.2:1, add rear continuation reaction 90min, sulfonated products is neutralized to PH 7 with the NaOH aqueous solution of 25wt%, steams solvent and obtains single dodecyl ditane disulfonic acid sodium, has confirmed the structure of product by electrospray ionization mass spectrum (see figure 1).In Fig. 1: m/z 517.22 [M-Na]
-, m/z 247.11 [M-2Na]
2-, M is mole molecular mass 540 of single dodecyl ditane disulfonic acid sodium.
Embodiment 2:
The aqueous solution that adds atlapulgite, tosic acid in the reactor with thermometer, electric mixer, the consumption of tosic acid is 30% of atlapulgite quality, under room temperature, stir 24h, suction filtration, filter cake is directly dried to constant weight at 200 ℃, by dried filter cake porphyrize, obtain composite catalyst.
In the reactor with thermometer, electric mixer, add lauryl alcohol, diphenylethane, catalyzer.The mol ratio of diphenylethane and lauryl alcohol is 3:1, and catalyst levels is 10% of raw material lauryl alcohol and diphenylethane total mass.Open and stir and heat, 160 ℃ of temperature of reaction, reaction times 70min after heat suction filtration reaction solution, under 1.5 Kpa pressure to the filtrate distilled that reduces pressure, steam≤the front-end volatiles of 200 ℃ are to remove unreacted diphenylethane and lauryl alcohol, afterwards again under 0.1 Kpa pressure to the bottoms distilled that reduces pressure, the cut of collecting 260 ~ 275 ℃ obtains intermediate product list dodecyl diphenylethane.
In the reactor with thermometer, electric mixer, reflux condensing tube, add single dodecyl diphenylethane, after adding trichloromethane to dissolve, open and stir, while being heated to 40 ℃, drip sulfan, the mol ratio of sulfan and single dodecyl diphenylethane is 3.0:1, add rear continuation reaction 60min, sulfonated products is neutralized to PH 7.5 with the KOH aqueous solution of 20wt%, steams solvent and obtains single dodecyl two styroyl disulfonic acid potassium.By electrospray ionization mass spectrum (see figure 2) analysis confirmation structure and the purity of product, in Fig. 2: m/z 547.3 [M-K]
-, m/z 254.2 [M-2K]
2-, m/z 509.3 [M-2K+H]
-, M is mole molecular mass 586 of single dodecyl diphenylethane disulfonic acid potassium.
Embodiment 3:
The aqueous solution that adds atlapulgite, sulfuric acid and thionamic acid in the reactor with thermometer, electric mixer, the consumption of sulfuric acid is 2% of atlapulgite quality, the consumption of thionamic acid is 10% of atlapulgite quality, under room temperature, stir 12h, suction filtration, filter cake is directly dried to constant weight at 150 ℃, by dried filter cake porphyrize, obtains composite catalyst.
In the reactor with thermometer, electric mixer, add lauryl alcohol, biphenyl, catalyzer.The mol ratio 2:1 of biphenyl and lauryl alcohol, catalyst levels is raw materials quality 20%.Open and stir and heat, 180 ℃ of temperature of reaction, reaction times 80min after heat suction filtration reaction solution, under 2.0 Kpa pressure to the filtrate distilled that reduces pressure, steam≤the front-end volatiles of 200 ℃ are to remove unreacted biphenyl and lauryl alcohol, afterwards again under 0.5 Kpa pressure to the bottoms distilled that reduces pressure, the cut of collecting 280 ~ 290 ℃ obtains intermediate product list dodecyl biphenyl.
In the reactor with thermometer, electric mixer, reflux condensing tube, add single dodecyl biphenyl, after adding trichloromethane to dissolve, unlatching passes into gas sulphur trioxide while being heated with stirring to 35 ℃, the mol ratio of gas sulphur trioxide and single dodecyl biphenyl is 2.5:1, add rear continuation reaction 70min, sulfonated products is neutralized to PH 6 with 25wt% ammonium hydroxide aqueous solution, steams solvent and obtains single dodecyl biphenyl disulfonic acid ammonium.By electrospray ionization mass spectrum (see figure 3) analysis confirmation structure and the purity of product, in Fig. 3: m/z 240.2 [M-2NH
4]
2-, M is mole molecular mass 516 of single dodecyl biphenyl disulfonic acid ammonium.
Embodiment 4:
The aqueous solution that adds atlapulgite, sulfuric acid and tosic acid in the reactor with thermometer, electric mixer, the quality of sulfuric acid is 5% of atlapulgite quality, the quality of tosic acid is 10% of atlapulgite quality, under room temperature, stir 10h, suction filtration, filter cake is dried to constant weight at 250 ℃, by dried filter cake porphyrize, obtains composite catalyst.
In the reactor with thermometer, electric mixer, reflux condensing tube, add 2-Ethylhexyl Alcohol, dinaphthylmethane (that is, two-1-naphthalene methane, CAS 607-50-1), catalyzer.The mol ratio of dinaphthylmethane and 2-Ethylhexyl Alcohol is 0.8:1, and catalyst levels is raw materials quality 15%.Open and stir and heat, 100 ℃ of temperature of reaction, reaction times 120min after heat suction filtration reaction solution, under 1.2 Kpa pressure, to the filtrate distilled that reduces pressure, the steam≤front-end volatiles of 200 ℃ obtain to remove unreacted raw material the intermediate product being comprised of single octyl group dinaphthylmethane and two octyl group dinaphthylmethanes.
In the reactor with thermometer, electric mixer, reflux condensing tube, add intermediate product, after adding hexanaphthene to dissolve, unlatching drips oleum while being heated with stirring to 30 ℃, the mol ratio of oleum and octyl group dinaphthylmethane is 1.1:1, add rear continuation reaction 40min, sulfonated products is neutralized to PH7.8 with 30wt% aqueous sodium hydroxide solution, obtains the mixture being comprised of single octyl group dinaphthylmethane sodium monosulfate and two octyl group dinaphthylmethane sodium monosulfate.By electrospray ionization mass spectrum (see figure 4) analysis confirmation structure and the purity of product, in Fig. 4: m/z 459.6 [M
1-Na]
-, M
1for single octyl group dinaphthylmethane sodium monosulfate molecular weight 482.6; M/z 571.8 [M
2-Na]
-, M
2for two octyl group dinaphthylmethane sodium monosulfate molecular weight 594.8.
Embodiment 5:
The aqueous solution that adds atlapulgite, tosic acid and thionamic acid in the reactor with thermometer, electric mixer, the consumption of tosic acid is 10% of atlapulgite quality, the consumption of thionamic acid is 2% of atlapulgite, under room temperature, stir 20h, suction filtration, filter cake is dried to constant weight at 180 ℃, by dried filter cake porphyrize, obtains composite catalyst.
In the reactor with thermometer, electric mixer, add stearyl alcohol, 3,4-dimethyl-3,4 phenylbenzene hexanes (CAS:10192-93-5, hereinafter to be referred as hexichol octane), catalyzer.The mol ratio of hexichol octane and stearyl alcohol is 1:1, and catalyst levels is raw materials quality 50%.Open and stir and heat, 120 ℃ of left and right of temperature of reaction, reaction times 30min, hot suction filtration reaction solution, under 1.0Kpa pressure to the filtrate distilled that reduces pressure, steam≤the front-end volatiles of 200 ℃, to remove unreacted stearyl alcohol and hexichol octane, obtain the intermediate product (that is: octadecyl hexichol octane) being comprised of single octadecyl hexichol octane and two octadecyl hexichol octanes.
In the reactor with thermometer, electric mixer, reflux condensing tube, add octadecyl hexichol octane, after adding eicosane (CAS:112-95-8) to dissolve, unlatching adds oleum while being heated with stirring to 50 ℃, the mol ratio of oleum and octadecyl hexichol octane is 1.0:1, add rear continuation reaction 80min, sulfonated products is neutralized to PH 6.2 with the 50% monoethanolamine aqueous solution, steams solvent and obtains the mixture being comprised of single octadecyl hexichol octane list sulfonic acid monoethanolamine salt, two octadecyl hexichol octane list sulfonic acid monoethanolamine salt.
Embodiment 6:
In the reactor with thermometer, electric mixer, add atlapulgite, sulphur aqueous acid, the consumption of sulfuric acid is 15% of atlapulgite quality, under room temperature, stirs 8h, suction filtration, filter cake is dried to constant weight at 300 ℃, by dried filter cake porphyrize, obtains composite catalyst.
In the reactor with thermometer, electric mixer, add nonyl alcohol, phenylbenzene dodecane (CAS No. 5368-74-1), catalyzer.The mol ratio of phenylbenzene dodecane and nonyl alcohol is 0.2:1, and catalyst levels is raw materials quality 25%.Open and stir and heat, temperature of reaction is controlled at 150 ℃ of left and right, reaction times 200min after heat suction filtration reaction solution, under 2.5 Kpa pressure to the filtrate distilled that reduces pressure, steam≤front-end volatiles of 150 ℃, to remove unreacted raw material, obtain the intermediate product (that is: nonyl hexichol dodecane) being formed by single nonyl hexichol dodecane, two nonyl hexichol dodecane.
With thermometer, electric mixer, in the reactor of reflux condensing tube, add intermediate product, after adding ethylene dichloride to dissolve, unlatching adds sulfan while being heated with stirring to 80 ℃, the mol ratio of sulfan and nonyl hexichol dodecane is 1.5:1, add rear continuation reaction 30min, sulfonated products is neutralized to PH 6.5 with the 35% trolamine aqueous solution, steaming solvent obtains by single nonyl hexichol dodecane list sulfonic acid triethanolamine salt, single nonyl hexichol dodecane disulfonic acid triethanolamine salt, two nonyl hexichol dodecane list sulfonic acid triethanolamine salts, the mixture that two nonyl hexichol dodecane disulfonic acid triethanolamine salts form.
Claims (4)
1. a technique of preparing alkyl two arene sulfonates, is characterized in that comprising the steps:
(1) in reactor, add catalyzer, two aromatic hydrocarbons, fatty alcohol, catalyst levels is 5%～50% of fatty alcohol and two aromatic hydrocarbons total masses, the mol ratio of two aromatic hydrocarbons and fatty alcohol is 0.2～5:1, after 100 ℃～200 ℃ reaction 10～200min, hot suction filtration reaction solution, filtrate is carried out to underpressure distillation to remove unreacted two aromatic hydrocarbons and fatty alcohol, bottoms is the mixture that monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form, and under high temperature condition of high vacuum degree, bottoms is carried out to underpressure distillation and obtains monoalkyl two aromatic hydrocarbons;
(2) in reactor, add mixture that monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form or monoalkyl two aromatic hydrocarbons, alkane, start and stir, while being heated to 30 ℃～50 ℃, add oleum, the mixture that oleum and monoalkyl two aromatic hydrocarbons and two alkyl two aromatic hydrocarbons form or the mol ratio of monoalkyl two aromatic hydrocarbons are 1～1.1:1, reaction times 30～60min, add again the aqueous solution of alkali to be neutralized to pH 6～8, the mass concentration of the aqueous solution of alkali is 20～50%, boils off solvent and obtains alkyl two aromatic hydrocarbons monosulfonates;
Two described aromatic hydrocarbons are Ar-X
1-Ar, X
1for C
0～C
12straight or branched alkyl, Ar is benzene or naphthalene;
Described catalyzer is one or more compositions in atlapulgite and sulfuric acid, tosic acid or thionamic acid, and the composite catalyst obtaining through dipping, roasting, wherein atlapulgite is Primary Catalysts, sulfuric acid, tosic acid or thionamic acid are promotor, and the consumption of promotor is 5～30% of Primary Catalysts quality;
Described alkane is C
6～C
20alkane, described C
6～C
20alkane is normal paraffin, isoparaffin, branched paraffin or naphthenic hydrocarbon.
2. a kind of technique of preparing alkyl two arene sulfonates as claimed in claim 1, is characterized in that described fatty alcohol is R
3-OH, R
3for C
8～C
18straight or branched alkyl.
3. a kind of technique of preparing alkyl two arene sulfonates as claimed in claim 1, it is characterized in that described to filtrate carry out underpressure distillation take the actual conditions of removing unreacting material as: under 1～2.5 KPa pressure to the filtrate distilled that reduces pressure, steam≤front-end volatiles of 200 ℃, this cut adds to and in reactor, carries out reuse.
4. a kind of technique of preparing alkyl two arene sulfonates as claimed in claim 1, it is characterized in that described under high temperature condition of high vacuum degree, bottoms carried out to the actual conditions that underpressure distillation obtains monoalkyl two aromatic hydrocarbons and being: under 0.1～0.5 KPa pressure, to the bottoms distilled that reduces pressure, collect the cut of 250～290 ℃.
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