CN104588103A - Catalyst used for synthesizing 2-alkylanthraquinone, and preparation method and application thereof - Google Patents
Catalyst used for synthesizing 2-alkylanthraquinone, and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a catalyst used for synthesizing 2-alkylanthraquinone and a preparation method thereof, and an application of the catalyst in synthesizing 2-alkylanthraquinone. The catalyst comprises, according to the weight of the catalyst, 20-70% of Beta zeolite, 0.1-30% of phosphomolybdic acid, 0.1-15% of chlorine, and balance of refractory inorganic oxide. When the catalyst provided by the invention is used for synthesizing 2-alkylanthraquinone from 2-(4'-alkylenzoyl)benzoic acid, the catalyst has the characteristics of environment friendliness, high activity, high selectivity and high efficiency. The catalyst is especially suitable for fixed-bed processes.
Description
Technical field
The present invention relates to a kind of Catalysts and its preparation method for the synthesis of 2-alkyl-anthraquinone; particularly with 2-(4 '-alkylbenzoyl) benzoic acid is the Catalysts and its preparation method used in Material synthesis 2-alkyl-anthraquinone process, and the application of this catalyst in synthesis 2-alkyl-anthraquinone.
Background technology
Alkyl-anthraquinone is important fine chemical material, with C
1~ C
5alkyl derivative outbalance, wherein 2-alkyl-anthraquinone has practicality most, is mainly used in hydrogen peroxide synthetic catalyst, in addition also as sensitising agent, the medicine and pesticide intermediate etc. of dyestuff intermediate, degradative resin.Along with the fast development of the industry such as global hydrogen peroxide and synthetic resin, 2-alkyl-anthraquinone especially high-quality 2-alkyl-anthraquinone demand is increased sharply, makes 2-alkyl-anthraquinone become quite potential serial fine chemistry.
2-alkyl-anthraquinone is serial fine chemical product, principal item 2-methylanthraquinone, 2-EAQ, 2-amyl anthraquinone, 2-tertiary pentyl anthraquinone and 2-tert-butyl group anthraquinone etc.Usual 2-alkyl-anthraquinone is flaxen solid, and fusing point, lower than anthraquinone, is dissolved in benzene, can be recrystallized by ethanol or acetic acid.2-alkyl-anthraquinone is mainly used in the anthraquinone carrier preparing hydrogen peroxide, also can be used as the intermediate of degradative resin, photopolymer materials or fuel.Along with the fast development of the industry such as global hydrogen peroxide and synthetic resin, the output of 2-alkyl-anthraquinone and anthraquinone can not meet growing needs.
The method of traditional production 2-alkyl-anthraquinone mainly adopts phthalic anhydride and alkylbenzene to be that raw material generates intermediate product 2-(4 '-alkylbenzoyl by acyl group method) benzoic acid; intermediate product 2-(4 '-alkylbenzoyl) benzoic acid process hydrolysis again; closed loop; distillating recovering solvent, redox purification and ethanol distillation abstraction technique finally obtain object product 2-alkyl-anthraquinone.Needed for the method, chemical technology is long; and need a large amount of alchlors and the concentrated sulfuric acid to make catalyst in course of reaction, WO96/286140 devises a kind of with 2-(4 '-alkylbenzoyl) benzoic acid mixture is the method that raw material utilizes that the concentrated sulfuric acid or oleum are Catalyst Production 2-EAQ.The shortcoming of this method is that the concentrated sulfuric acid and oleum have stronger corrosivity and environmental hazard, and post processing work is more loaded down with trivial details.Therefore people try hard to prepare 2-EAQ with a kind of eco-friendly catalyst.
Beta zeolite is the zeolite molecular sieve of the height accumulation defect that tetragonal crystal system and monoclinic system form jointly, has three-dimensional twelve-ring duct, and has good hydrothermal stability and anti-coking performance.At present to Beta zeolite catalysis performance, as the aspects such as the cracking of hydro carbons and isomery, toluene disproportionation, the transalkylation of multi-methyl benzene, the disproportionation of large molecule naphthalene conduct extensive research.E. Santacesaria etc. are at CATALYSIS TODAY 66(2001) report with 2-(benzoyl in 167 ~ 174) benzoic acid is raw material; the Beta zeolite exchanged through a step acid is catalyst; reactant dehydration closed-loop is made to synthesize the technique of anthraquinone; obtain good effect, but reaction temperature is higher.In synthesis 2-alkyl-anthraquinone process, come off and the problem such as isomerization owing to there is alkyl in course of reaction, therefore will obtain highly purified 2-alkyl-anthraquinone relatively difficult.CN200410155473.5 is the acid Beta zeolite utilizing ammonium nitrate or acid solution exchange system to obtain is catalyst synthesis 2-alkyl-anthraquinone, and the reaction time required when adopting this catalyst is longer, and reaction temperature is higher.
In synthesis anthraquinone process, US4304724 utilizes 2-(benzoyl) benzoic acid synthesizes anthraquinone under the effect of fluorinated sulfonic resin crossed by catalyst.This catalyst system and catalyzing environmentally safe, operating condition is gentle.But shortcoming is 2-(benzoyl) conversion of benzoic acid is lower, and anthraquinone is selective not high.CN1879965A discloses a kind of catalyst produced for 2-alkyl-anthraquinone and anthraquinone, carry out modification by twice pair of Beta zeolite, wherein first time modification is as the acid solution such as citric acid, acetic acid or ammonium salt solution and Beta molecular sieve exchange with non-metal cations solution, second time modification, the modifier of employing is acid solution or metal oxide.When this catalyst is used for intermittent reaction, 2-(4 '-ethylamino benzonitrile acyl group) benzoic conversion ratio and 2-EAQ selective higher.
In above-mentioned synthesis anthraquinone process, adopt modification Beta molecular sieve as catalyst, mainly utilize the tiny catalyst granules of Beta molecular sieve to provide enough reactivities, therefore, existing synthesis anthraquinone process is still employing intermittent operation, so just can give full play to the performance of Beta molecular sieve, improve the conversion ratio of reactant and the selective of target product.At present, this synthesis anthraquinone process is owing to being subject to the restriction of catalyst performance, still cannot realize fixed bed continued operation, because shaping of catalyst need be made the particle of greater particle size by fixed bed continued operation, and the tiny particle of Beta molecular sieve is after shaping, its outer surface sharply reduces, and the performance of molecular sieve can not be not fully exerted, thus causes reaction effect undesirable.
Summary of the invention
For overcoming weak point of the prior art, the invention provides a kind of Catalysts and its preparation method for the synthesis of 2-alkyl-anthraquinone, and the application of this catalyst in synthesis 2-alkyl-anthraquinone.When catalyst of the present invention is for the synthesis of 2-alkyl-anthraquinone, there is environmental friendliness, active high, selective height, the feature that efficiency is high.
The present invention is for the synthesis of the catalyst of 2-alkyl-anthraquinone, its composition comprises Beta zeolite, phosphomolybdic acid, chlorine and refractory inorganic oxides, with the weight of catalyst for benchmark, Beta zeolite content is 20.0% ~ 70.0%, and be preferably 30.0% ~ 60.0%, phosphomolybdic acid content is 0.1% ~ 30.0%, be preferably 1.0% ~ 20.0%, chlorinity is 0.1% ~ 15.0%, and be preferably 0.5% ~ 10%, surplus is refractory inorganic oxides.
The present invention is for the synthesis of the catalyst of 2-alkyl-anthraquinone, its composition is preferably the Beta zeolite of phosphomolybdic acid modification and chloride refractory inorganic oxides, wherein the weight ratio of phosphomolybdic acid and Beta zeolite is 0.005 ~ 0.5:1, be preferably 0.1 ~ 0.4:1, the weight ratio of chlorine and refractory inorganic oxides is 0.01 ~ 0.5:1, is preferably 0.02 ~ 0.4:1.
Catalyst of the present invention, Beta zeolite used is Hydrogen Beta zeolite.
Described refractory inorganic oxides is selected from one or more in aluminium oxide, titanium oxide, silica, boron oxide, magnesia, kaolin and clay, is preferably kaolin or/and clay, more preferably kaolin.
The present invention, for the synthesis of the preparation method of the catalyst of 2-alkyl-anthraquinone, can adopt conventional kneading method preparation, comprise: phosphomolybdic acid, Beta zeolite, chlorine-containing compound and refractory inorganic oxides are mixed, then shaping, by drying, obtains catalyst of the present invention.
The preferred preparation method of catalyst of the present invention, specifically comprises:
(1) loaded to by phosphomolybdic acid on Beta zeolite, drying obtains the Beta zeolite of phosphomolybdic acid modification;
(2) load in refractory inorganic oxides by chlorine-containing compound, drying obtains chloride refractory inorganic oxides;
(3) the chloride refractory inorganic oxides that phosphomolybdic acid modification Beta zeolite step (1) obtained and step (2) obtain fully mixes, then shaping, and drying, obtains catalyst of the present invention.
Phosphomolybdic acid is loaded on Beta zeolite in step (1), kneading method or infusion process preparation can be adopted, such as, appropriate water, phosphomolybdic acid and Beta zeolite fully can be mixed, then drying, namely obtain the Beta zeolite of phosphomolybdic acid modification.
Chlorine-containing compound loads in refractory inorganic oxides in (2) by step, kneading method or infusion process preparation can be adopted, such as appropriate water, chlorine-containing compound and refractory inorganic oxides fully can be mixed, then drying, namely obtain chloride refractory inorganic oxides.
Described chlorine-containing compound can be butter, such as, in hydrochloric acid, ammonium chloride, sodium chloride, potassium chloride, potassium chlorate, hypochlorous acid, magnesium chloride, calcium chloride etc. one or more, also can be organic chlorine-containing compound, such as, in chloroform, dichloroethanes, carbon tetrachloride etc. one or more.Be preferably butter, especially water-soluble butter, more preferably hydrochloric acid.
Described inorganic refractory oxide is selected from one or more in aluminium oxide, titanium oxide, silica, boron oxide, magnesia, kaolin and clay, is preferably kaolin or/and clay, more preferably kaolin.
Step (1) and the drying condition described in (2) are: room temperature ~ 300 DEG C, 0.1 hour ~ 100 hours, and be preferably 100 DEG C ~ 200 DEG C, 2 hours ~ 48 hours, drying condition can be identical, also can be different.Drying condition described in step (3) is: room temperature ~ 200 DEG C, 0.1 hour ~ 100 hours, is preferably 50 DEG C ~ 150 DEG C, 2 hours ~ 48 hours.
In the inventive method, the described shaping conventional method that can adopt is shaping, such as extruded moulding method, can make bar shaped, clover, bunge bedstraw herb, cylindrical, spherical etc. as required.Conventional shaping assistant can be added, one or more in such as adhesive, peptizing agent, extrusion aid in forming process.
When catalyst of the present invention is for the synthesis of 2-alkyl-anthraquinone, have environmental friendliness, activity and selectivity is high, and is particularly suitable for, for fixed bed continuous flow procedure, improve production efficiency greatly.
When catalyst of the present invention is for the synthesis of 2-alkyl-anthraquinone, reaction condition is: reaction temperature 150 DEG C ~ 350 DEG C, pressure 0.1MPa ~ 10MPa, volume space velocity 0.1h
-1~ 10h
-1, gas agent volume ratio 50 ~ 1000, optimum condition is: reaction temperature 200 DEG C ~ 300 DEG C, pressure 0.2MPa ~ 2.0MPa, volume space velocity 0.5h
-1~ 3.0h
-1, gas agent volume ratio 100 ~ 500.The gas medium of reaction system is inert gas, such as, in argon gas, neon, nitrogen etc. one or more, is preferably nitrogen.Reacting the raw material that uses is 2-(4 '-alkylbenzoyl) benzoic acid, such as 2-(4 '-methyl benzoyl) benzoic acid, 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid, 2-(4 '-third class benzoyl) benzoic acid, 2-(4 '-butylbenzoyl) benzoic acid or 2-(4 '-amyl-benzoyl) benzoic acid etc.Product is 2-alkyl-anthraquinone, such as 2-methylanthraquinone, 2-EAQ, 2-third class anthraquinone, 2-butyl anthraquinone or 2-amyl anthraquinone.
When adopting the present invention preferred catalyst for the synthesis of 2-alkyl-anthraquinone, 2-(4 '-ethylamino benzonitrile acyl group) the benzoic conversion ratio selectivity that can reach more than 96%, 2-alkyl-anthraquinone reaches more than 97%.
Detailed description of the invention
Further illustrate catalyst of the present invention below by embodiment, but invention should not be deemed limited in following embodiment.
Catalyst of the present invention adopts 10ml fixed bed reactors to evaluate; loaded catalyst is 10ml; raw material 2-(4-alkylbenzoyl) be in granular solids under benzoic acid normal temperature; need to melt before charging; and the pipeline of whole system needs to carry out being incubated (heating); the reaction condition of system is adjusted to the appreciation condition of design, start into raw material, appreciation condition is in table 2.Stable reaction, after 4 hours, is got a certain amount of product and is dissolved in Isosorbide-5-Nitrae-dioxane solvent, and analyze product composition by Agilent 1100 type high pressure liquid chromatography, chromatographic column is ZORBAX SB-C18, and multi-wavelength UV-detector detects.
The present invention's Beta zeolite used is commercially available silica alumina ratio (SiO
2/ Al
2o
3) be 47 Hydrogen Beta zeolite; 2-(4 '-alkylbenzoyl) benzoic acid adopts commercially available 2-(4 '-alkylbenzoyl) benzoic acid solid particle.
embodiment 1
A kind of preparation method's preparation process of catalyst of the present invention is as follows:
(1) take 70 grams of Beta zeolites, 10 grams of phosphomolybdic acids fully mix and 150 ml waters, fully mix, 120 DEG C of dryings 6 hours, obtain the Beta zeolite of load phosphomolybdic acid.
(2) be that the hydrochloric acid of 20%, 50 grams of water and 15 grams of kaolin fully mix by 20 gram mass marks, 100 DEG C of dryings 12 hours, obtain chloride kaolin.
(3) the chloride kaolin that 20 grams of steps (2) obtain is added in the Beta zeolite of the load phosphomolybdic acid obtained toward step (1), appropriate water is added after abundant mixing, abundant kneading becomes plastic paste, be extruded into the bar that cross section is bunge bedstraw herb, 180 DEG C of dryings 8 hours, obtain catalyst of the present invention, be numbered E-1.
Laboratory is evaluated E-1 catalyst, and appreciation condition is in table 2, and evaluation result is in table 3.
embodiment 2 ~ 7
The preparation method of each embodiment catalyst is with embodiment 1, and difference is that composition, appreciation condition are different with evaluation result, and concrete catalyst composition is in table 1, and appreciation condition is in table 2, and evaluation result is in table 3.
embodiment 8
A kind of preparation method of catalyst of the present invention is with embodiment 3, difference is that catalyst preparation step (1) and step (2) are combined into together, plastic paste is become with the abundant kneading of water by phosphomolybdic acid, Beta zeolite, hydrochloric acid, aluminium oxide, nitric acid, be extruded into the bar that cross section is bunge bedstraw herb, 180 DEG C of dryings 8 hours, obtain catalyst of the present invention, numbering E-8, catalyst composition is in table 1, and appreciation condition is in table 2, and evaluation result is in table 3.
comparative example 1 ~ 3
The preparation method of comparative example 1 ~ 3 catalyst C-1 ~ C-3 is with embodiment 3, and difference is that composition, appreciation condition are different with evaluation result, and concrete catalyst composition is in table 1, and appreciation condition is in table 2, and evaluation result is in table 3.
the composition of each embodiment of table 1 (comparative example) catalyst(unreceipted content is weight percent content)
| Numbering | Beta，% | Phosphomolybdic acid, % | Chlorine, % | Refractory inorganic oxides, % | Remarks * |
| E-1 | 70 | 10 | 5 | Surplus | Kaolin |
| E-2 | 60 | 25 | 0.2 | Surplus | Clay |
| E-3 | 60 | 15 | 5 | Surplus | Aluminium oxide |
| E-4 | 50 | 7 | 1 | Surplus | Kaolin |
| E-5 | 60 | 20 | 0.5 | Surplus | Kaolin |
| E-6 | 40 | 12 | 10 | Surplus | Kaolin |
| E-7 | 20 | 2 | 13 | Surplus | Kaolin |
| E-8 | 60 | 15 | 5 | Surplus | Aluminium oxide |
| C-1 | 60 | 15 | 0 | Surplus | Aluminium oxide |
| C-2 | 0 | 15 | 5 | Surplus | Aluminium oxide |
| C-3 | 60 | 0 | 5 | Surplus | Aluminium oxide |
* be each embodiment and comparative example refractory inorganic oxides used in remarks.
the appreciation condition of each catalyst of table 2
| Numbering | Reaction temperature, DEG C | Reaction pressure, MPa | Volume space velocity, h -1 | Gas agent volume ratio |
| E-1 | 228 | 0.2 | 0.5 | 200 |
| E-2 | 235 | 0.5 | 0.8 | 300 |
| E-3 | 240 | 1.0 | 1.0 | 400 |
| E-4 | 243 | 2.0 | 1.0 | 400 |
| E-5 | 248 | 3.0 | 1.0 | 400 |
| E-6 | 224 | 4.0 | 1.0 | 400 |
| E-7 | 231 | 5.0 | 1.0 | 400 |
| E-8 | 240 | 1.0 | 1.0 | 400 |
| C-1 | 240 | 1.0 | 1.0 | 400 |
| C-2 | 240 | 1.0 | 1.0 | 400 |
| C-3 | 240 | 1.0 | 1.0 | 400 |
the evaluation result of each catalyst of table 3
| Numbering | Raw material | Conversion ratio, % | Product | Selectivity of product, % |
| E-1 | 2-(4 '-methyl benzoyl) benzoic acid | 99.1 | 2-methylanthraquinone | 98.4 |
| E-2 | 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid | 98.5 | 2-EAQ | 97.3 |
| E-3 | 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid | 99.3 | 2-EAQ | 99.2 |
| E-4 | 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid | 98.8 | 2-EAQ | 99.1 |
| E-5 | 2-(4-propylbenzoyl) benzoic acid | 96.2 | 2-propyl group anthraquinone | 98.4 |
| E-6 | 2-(4 '-butylbenzoyl) benzoic acid | 98.7 | 2-butyl anthraquinone | 99.1 |
| E-7 | 2-(4 '-amyl-benzoyl) benzoic acid | 96.6 | 2-amyl anthraquinone | 97.6 |
| E-8 | 2-(4 '-methyl benzoyl) benzoic acid | 84.3 | 2-methylanthraquinone | 96.4 |
| C-1 | 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid | 75.5 | 2-EAQ | 91.2 |
| C-2 | 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid | 13.0 | 2-EAQ | 68.1 |
| C-3 | 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid | 80.8 | 2-EAQ | 93.7 |
Conversion ratio in table 3 and selectivity of product are molar percentage.
From the results shown in Table 3; catalyst of the present invention is with 2-(4 '-alkylbenzoyl) benzoic acid is the technical process that 2-alkyl-anthraquinone produced by raw material; no matter at 2-(4 '-alkylbenzoyl) benzoic conversion ratio; or the selective aspect of 2-alkyl-anthraquinone, is all obviously better than the reaction result of catalyst in comparative example.And the reaction effect of the catalyst (E-1 ~ E-7) adopting the preferred process of the present invention to prepare is significantly better than the catalyst (E-8) adopting conventional kneading method to prepare.
Claims (24)
1. the catalyst for the synthesis of 2-alkyl-anthraquinone, its composition comprises Beta zeolite, phosphomolybdic acid, chlorine and refractory inorganic oxides, with the weight of catalyst for benchmark, Beta zeolite content is 20.0% ~ 70.0%, phosphomolybdic acid content is 0.1% ~ 30.0%, chlorinity is 0.1% ~ 15.0%, and surplus is refractory inorganic oxides.
2. according to catalyst according to claim 1, it is characterized in that described catalyst, with the weight of catalyst for benchmark, Beta zeolite content is 30.0% ~ 60.0%, phosphomolybdic acid content is 1.0% ~ 20.0%, and chlorinity is 0.5% ~ 10%, and surplus is refractory inorganic oxides.
3., according to catalyst according to claim 1, it is characterized in that the Beta zeolite consisting of phosphomolybdic acid modification of described catalyst and chloride refractory inorganic oxides.
4. according to the catalyst described in claim 1 or 3, it is characterized in that in described catalyst, the weight ratio of phosphomolybdic acid and Beta zeolite is 0.005 ~ 0.5:1, and the weight ratio of chlorine and refractory inorganic oxides is 0.01 ~ 0.5:1.
5. according to the catalyst described in claim 1 or 3, it is characterized in that in described catalyst, the weight ratio of phosphomolybdic acid and Beta zeolite is 0.1 ~ 0.4:1, and the weight ratio of chlorine and refractory inorganic oxides is 0.02 ~ 0.4:1.
6., according to the catalyst described in claim 1 or 3, it is characterized in that Beta zeolite used is Hydrogen Beta zeolite.
7., according to the catalyst described in claim 1 or 3, it is characterized in that one or more that described refractory inorganic oxides is selected from aluminium oxide, titanium oxide, silica, boron oxide, magnesia, kaolin and clay.
8., according to the catalyst described in claim 1 or 3, it is characterized in that described refractory inorganic oxides is that kaolin is or/and clay.
9. the preparation method of catalyst according to claim 1, comprising: phosphomolybdic acid, Beta zeolite, chlorine-containing compound and refractory inorganic oxides are mixed, then shaping, drying process, obtains the catalyst for the synthesis of 2-alkyl-anthraquinone.
10. according to preparation method according to claim 9, it is characterized in that, the preparation method of described catalyst comprises:
(1) loaded to by phosphomolybdic acid on Beta zeolite, drying obtains the Beta zeolite of phosphomolybdic acid modification;
(2) load in refractory inorganic oxides by chlorine-containing compound, drying obtains chloride refractory inorganic oxides;
(3) the chloride refractory inorganic oxides that phosphomolybdic acid modification Beta zeolite step (1) obtained and step (2) obtain fully mixes, then shaping, and drying, obtains the catalyst for the synthesis of 2-alkyl-anthraquinone.
11., according to preparation method according to claim 10, is characterized in that, are loaded to by phosphomolybdic acid on Beta zeolite in step (1), adopt kneading method or infusion process preparation.
12., according to preparation method according to claim 10, is characterized in that, chlorine-containing compound loads in refractory inorganic oxides in (2) by step, adopt kneading method or infusion process preparation.
13., according to the preparation method described in claim 9 or 10, is characterized in that, described chlorine-containing compound is one or more in hydrochloric acid, ammonium chloride, sodium chloride, potassium chloride, potassium chlorate, hypochlorous acid, magnesium chloride, calcium chloride.
14., according to the preparation method described in claim 9 or 10, is characterized in that, described chlorine-containing compound is one or more in chloroform, dichloroethanes, carbon tetrachloride.
15., according to the preparation method described in claim 9 or 10, is characterized in that, described chlorine-containing compound is hydrochloric acid.
16., according to the preparation method described in claim 9 or 10, is characterized in that, described inorganic refractory oxide is selected from one or more in aluminium oxide, titanium oxide, silica, boron oxide, magnesia, kaolin and clay.
17., according to the preparation method described in claim 9 or 10, is characterized in that, described inorganic refractory oxide is selected from kaolin or/and clay.
18., according to preparation method according to claim 10, is characterized in that, step (1) and the drying condition described in (2) are: room temperature ~ 300 DEG C drying 0.1 hour ~ 100 hours; Drying condition described in step (3) is: room temperature ~ 200 DEG C drying 0.1 hour ~ 100 hours.
19. according to preparation method according to claim 9, it is characterized in that described drying condition is: room temperature ~ 200 DEG C drying 0.1 hour ~ 100 hours.
20. 1 kinds by 2-(4 '-alkylbenzoyl) method of benzoic acid synthesis 2-alkyl-anthraquinone, it is characterized in that adopting the arbitrary catalyst of claim 1 ~ 8.
21. in accordance with the method for claim 20, it is characterized in that, adopt fixed-bed process, reaction condition is: reaction temperature 150 DEG C ~ 350 DEG C, pressure 0.1MPa ~ 10MPa, volume space velocity 0.1h
-1~ 10h
-1, gas agent volume ratio 50 ~ 1000.
22. in accordance with the method for claim 20, it is characterized in that, adopt fixed-bed process, reaction condition is: reaction temperature 200 DEG C ~ 300 DEG C, pressure 0.2MPa ~ 2.0MPa, volume space velocity 0.5h
-1~ 3.0h
-1, gas agent volume ratio 100 ~ 500.
23., according to the method described in claim 21 or 22, is characterized in that, the gas medium of reaction system is inert gas.
24. in accordance with the method for claim 20; it is characterized in that; react raw material 2-(4 '-alkylbenzoyl of using) benzoic acid is 2-(4 '-methyl benzoyl) benzoic acid, 2-(4 '-ethylamino benzonitrile acyl group) benzoic acid, 2-(4 '-third class benzoyl) benzoic acid, 2-(4 '-butylbenzoyl) benzoic acid or 2-(4 '-amyl-benzoyl) benzoic acid, its product 2-alkyl-anthraquinone should be 2-methylanthraquinone, 2-EAQ, 2-third class anthraquinone, 2-butyl anthraquinone or 2-amyl anthraquinone mutually.
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| CN110937988A (en) * | 2018-09-25 | 2020-03-31 | 中国石油化工股份有限公司 | One-step process for preparing 2-alkyl anthraquinone |
| CN110937988B (en) * | 2018-09-25 | 2022-08-12 | 中国石油化工股份有限公司 | One-step process for preparing 2-alkyl anthraquinone |
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