CN1632061A - Selective cracking catalyst for producing low carbon olefin - Google Patents
Selective cracking catalyst for producing low carbon olefin Download PDFInfo
- Publication number
- CN1632061A CN1632061A CN 200410096438 CN200410096438A CN1632061A CN 1632061 A CN1632061 A CN 1632061A CN 200410096438 CN200410096438 CN 200410096438 CN 200410096438 A CN200410096438 A CN 200410096438A CN 1632061 A CN1632061 A CN 1632061A
- Authority
- CN
- China
- Prior art keywords
- molecular sieve
- metal salt
- gasoline
- salt solution
- metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 21
- 238000005336 cracking Methods 0.000 title claims abstract description 13
- 239000003054 catalyst Substances 0.000 title claims abstract description 12
- -1 carbon olefin Chemical class 0.000 title abstract 4
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title description 7
- 239000002808 molecular sieve Substances 0.000 claims abstract description 16
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 8
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010457 zeolite Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000012266 salt solution Substances 0.000 claims description 10
- 230000002378 acidificating effect Effects 0.000 claims description 7
- 229910052755 nonmetal Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001354 calcination Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000084 colloidal system Substances 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000012986 modification Methods 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- 206010013786 Dry skin Diseases 0.000 claims description 2
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 229910052680 mordenite Inorganic materials 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052758 niobium Inorganic materials 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 2
- 150000002910 rare earth metals Chemical class 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 229910052718 tin Inorganic materials 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910052675 erionite Inorganic materials 0.000 claims 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 150000001336 alkenes Chemical class 0.000 abstract description 15
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 abstract description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 abstract description 6
- 238000004523 catalytic cracking Methods 0.000 abstract description 3
- 239000005977 Ethylene Substances 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 125000000217 alkyl group Chemical group 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 238000007233 catalytic pyrolysis Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical compound [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Abstract
A selective cracking catalyst producing low carbon alkene, belongs to the development of producing low carbon alkene by catalytic cracking gasoline and high zincic alkyl value gasoline catalyst with low content of alkene, mainly through modifying acid molecular sieve and zeolite, produces the high zincic alkyl value gasoline with low content of alkene in the time of producing low carbon alkene, which can selectively crack the alkene in FCC gasoline. In the suitable conditions, the productivity of ethylene and propylene can be higher than 30%,even to be 40%, the selective cracking is higher, and the loss of gasoline is less.
Description
Technical field
The present invention designs a kind of selective cracking catalyst that is used to produce low-carbon alkene, it is to belong to the improvement of catalytically cracked gasoline being produced the stop bracket gasoline catalyzer of low-carbon alkene coproduction low olefin-content, it mainly is by modification acidic molecular sieve or zeolite, it is had can selective splitting alkene wherein to FCC gasoline, thereby produce the stop bracket gasoline of low olefin-content when producing low-carbon alkene.
Background technology
Traditional technology-the hydrocarbon pyrolysis of production low-carbon alkene in operation more than 800 ℃, and needs a large amount of water vapour to participate in reaction, and energy consumption is big, and is high to the material requirement of equipment; In addition, in the low-carbon alkene that this process is produced, the yield of ethene is higher than propylene, and is difficult to regulate.From the present market requirement, propylene is comparatively well sold and in short supply.Thereby, no matter, all need existing low-carbon alkene production technology is reformed from reducing production costs or improving the angle of product structure.
The commercial gasoline of China nearly 80% all is catalytic cracking (FCC) gasoline, and the characteristics of this gasoline are the olefin(e) centent height, and octane value is higher.China's gasoline standard requirement olefin(e) centent can not be greater than 35% (vol), and olefin(e) centent will be limited in Beijing can not surpass 20% (vol), and the olefin(e) centent of FCC gasoline is generally all more than 40% (vol).The method that reduces the FCC content of olefin in gasoline at present has the method for FCC gasoline hydrogenation and use olefine lowering catalyst or additive, and the former can descend the phenomenon that the latter then exists coke and/or dry gas yied to raise because of the saturated octane value that makes of alkene.Therefore, the alkene in the selective splitting FCC gasoline how, when converting it into low-carbon alkene, the stop bracket gasoline that can make the low olefin-content that FCC gasoline changes into is to be worth the important topic explored at present.
Summary of the invention
Purpose of the present invention is developed a kind of selective splitting catalyzer with regard to being to avoid above-mentioned the deficiencies in the prior art part, it is to be raw material with FCC gasoline, selective splitting alkene wherein, and when producing low-carbon alkene, produce the stop bracket gasoline of low olefin-content.It mainly is by acidic molecular sieve or zeolite are carried out making after the modification with properties-correcting agent, its major technology characteristics are that used active constituent is mesopore or aperture acidic molecular sieve or the zeolite that hydrogen transfer activity will be lower, used properties-correcting agent is metal or non-metal salt solution, and its carrier then is to adopt Al
2O
3, SiO
2, diatomite or kaolin, and by following concrete steps preparation:
(1). on molecular sieve, flood 0.1～30% metal salt solution, after 5～10 hours,, metal is dispersed on the molecular sieve with the form of oxide compound again 200～700 ℃ of roastings 0.5～10 hour 60～200 ℃ of dryings;
(2). will flood the molecular sieve of metal and carrier again is 3: 7 mixed by mass ratio, adds water and mixes, and dripping hydrochloric acid forms colloid, makes pH value remain on 2～5;
(3). then, 700 ℃ of down calcinings 4～6 hours, grind screening, the product of getting particle diameter and be 20～100nm gets final product.
In order to realize above-mentioned purpose of the present invention better, mesopore wherein or aperture acidic molecular sieve or zeolite are ZSM series molecular sieve, mordenite and the erionites that adopts.Its described metal salt solution is meant the metal salt solution that comprises Ag, Cu, Mn, Cr, Co, Ti, Ni, Sn, Nb, Fe, V or rare earth metal, and non-metal salt solution is meant that the non-metal salt that comprises P is molten.
Embodiment
Come enumeration technical characterstic of the present invention below in conjunction with specific embodiment.
At actual experiment with in producing, the contriver realizes of the present invention by following embodiment:
Embodiment 1
Press NH
4Cl and NaZSM-5 ratio (quality) are to carry out adding distil water, heated and stirred 7～8h, 100 ℃ oven dry, HZSM-5 that weighing obtain at 1: 2.4;
Embodiment 2
Press NH
4Cl and NaZSM-5 ratio (quality) are to carry out adding distil water, heated and stirred 7～8h, 100 ℃ oven dry, HZSM-5 that weighing obtain at 1: 1.2;
Embodiment 3
HZSM-5 with embodiment 1 and 2 makes with 700 ℃ of calcinings, forms the slightly yellowy powder of white.
Embodiment 4
Burnt HZSM-5 and pseudo-boehmite among the embodiment 3 are mixed in 3: 7 ratio (quality), add water and mix, dripping hydrochloric acid forms colloid, pH value remains on 2～5, and 700 ℃ of down calcinings 4 hours, grind again, the catalyzer that sieves out particle diameter and be 20～100nm gets final product.
The catalyzer that obtains in the foregoing description 4 is carried out evaluation experimental:
In the reaction times is 1h, H
2O/Oil (wt/wt) is 0.48, the catalyzer loading amount be 7g, oil inlet quantity be under the reaction conditions of 150g/h evaluation result as shown in drawings, the yield of Zhi Bei Catalyst Production low-carbon alkene and selectivity are all higher as can be known, and the yield height of gasoline, loss is few.
Description of drawings
Accompanying drawing is and uses the influence synoptic diagram of catalyzer afterreaction temperature of the present invention to FCC gasoline catalyzing thermo-cracking.
The invention effect
Preparing the catalyzer of the stop bracket gasoline that is used to produce low-carbon alkene coproduction low olefin-content, is that raw material is estimated with FCC gasoline on small fixed.
Reaction result shows, is that 600 ℃, reaction times are 1h, H in temperature of reaction
2O/Oil (wt/wt) is 0.55, the catalyzer loading amount is that 7g, oil inlet quantity are under the situation of 150g/h, and yield and selectivity that the ethene of catalytic pyrolysis adds propylene are respectively 31.76%, 71.49%, are higher than 28.77% and 50.17% of same raw material thermo-cracking.Its propylene/ethylene (wt) is 2.12 simultaneously.This shows the better performances of this catalyzer aspect the production low-carbon alkene.The yield of by product, selectivity are lower than thermo-cracking in the catalytic pyrolysis, and especially coke and hydrogen have reduced by 87.5% and 80% respectively.The transformation efficiency specific heat cracked of catalytic pyrolysis is low by 12.91%, so just can obtain more gasoline.
The RON of gasoline, MON and anti-knock index are respectively 95.7,83.1,89.4 behind the catalytic cracking reaction, have increased by 4.7,5.0,4.9 respectively than raw material.Simultaneously the olefin(e) centent of gasoline 35.27% has dropped to 10.39% before react, just in the raw material 85.16% alkene by the low-carbon alkene that has been cracked into of selectivity.Opposite, the content of reaction back alkane, naphthenic hydrocarbon, aromatic hydrocarbons has increased by 3.03,2.17,20.22 percentage points respectively, and this explanation selectivity of catalyst is very good.
The above results proves absolutely, the effect that the FCC gasoline catalyzing cracking system alkene catalyst of development is taken into account production low-carbon alkene and high-octane rating, gasoline with low olefine content is remarkable, under suitable reaction conditions, the yield that ethene adds propylene can reach more than 30%, even near 40%; And cracking selectivity height, the gasoline loss is little.
Claims (3)
1. selective cracking catalyst that is used to produce low-carbon alkene, it mainly is by acidic molecular sieve or zeolite are carried out making after the modification with properties-correcting agent, it is characterized in that used active constituent is mesopore or aperture acidic molecular sieve or the zeolite that hydrogen transfer activity will be lower, used properties-correcting agent is metal or non-metal salt solution, and its carrier then is to adopt Al
2O
3, SiO
2, diatomite or kaolin, its concrete preparation process is as follows:
(1). on molecular sieve, flood 0.1～30% metal salt solution, after 5～10 hours,, metal is dispersed on the molecular sieve with the form of oxide compound again 200～700 ℃ of roastings 0.5～10 hour 60～200 ℃ of dryings;
(2). will flood the molecular sieve of metal and carrier again is 3: 7 mixed by mass ratio, adds water and mixes, and dripping hydrochloric acid forms colloid, makes pH value remain on 2～5;
(3). then, 700 ℃ of down calcinings 4～6 hours, grind screening, the product of getting particle diameter and be 20～100nm gets final product.
2. the selective cracking catalyst that is used to produce low-carbon alkene according to claim 1 is characterized in that described mesopore or aperture acidic molecular sieve or zeolite are meant ZSM series molecular sieve, mordenite and erionite.
3. the selective cracking catalyst that is used to produce low-carbon alkene according to claim 1, it is characterized in that described metal salt solution is meant the metal salt solution that comprises Ag, Cu, Mn, Cr, Co, Ti, Ni, Sn, Nb, Fe, V or rare earth metal, non-metal salt solution is meant that the non-metal salt that comprises P is molten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100964380A CN100486702C (en) | 2004-12-01 | 2004-12-01 | Selective cracking catalyst for producing low carbon olefin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100964380A CN100486702C (en) | 2004-12-01 | 2004-12-01 | Selective cracking catalyst for producing low carbon olefin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632061A true CN1632061A (en) | 2005-06-29 |
| CN100486702C CN100486702C (en) | 2009-05-13 |
Family
ID=34847863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100964380A Expired - Fee Related CN100486702C (en) | 2004-12-01 | 2004-12-01 | Selective cracking catalyst for producing low carbon olefin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100486702C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100469743C (en) * | 2005-12-22 | 2009-03-18 | 中国石油化工股份有限公司 | Preparing process for propylene with gasoline |
| CN100471935C (en) * | 2006-05-23 | 2009-03-25 | 中国科学院山西煤炭化学研究所 | Process for modifying FCC whole-distillate gasoline and simultaneously producing low carbon alkene |
| CN101116827B (en) * | 2006-07-31 | 2010-12-01 | 中国石油化工股份有限公司 | Catalyzer for preparing low carbon olefinic hydrocarbon through hydrocarbons catalytic oxidation cracking and its uses |
| CN101234764B (en) * | 2007-01-31 | 2011-01-19 | 中国石油化工股份有限公司石油化工科学研究院 | Method of preparing MFI structure molecular sieve containing phosphorus and transition metal |
| CN102008939A (en) * | 2010-11-15 | 2011-04-13 | 西北农林科技大学 | Method for preparing aluminum-manganese composite oxide modified molecular sieve |
| CN101619011B (en) * | 2008-06-30 | 2012-07-25 | 中国石油化工股份有限公司 | Method for producing ethylene and propylene by catalytic cracking |
| CN103084202A (en) * | 2012-11-28 | 2013-05-08 | 淮南师范学院 | Method for preparing composite catalyst for loaded nano zeolite seed crystal |
-
2004
- 2004-12-01 CN CNB2004100964380A patent/CN100486702C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100469743C (en) * | 2005-12-22 | 2009-03-18 | 中国石油化工股份有限公司 | Preparing process for propylene with gasoline |
| CN100471935C (en) * | 2006-05-23 | 2009-03-25 | 中国科学院山西煤炭化学研究所 | Process for modifying FCC whole-distillate gasoline and simultaneously producing low carbon alkene |
| CN101116827B (en) * | 2006-07-31 | 2010-12-01 | 中国石油化工股份有限公司 | Catalyzer for preparing low carbon olefinic hydrocarbon through hydrocarbons catalytic oxidation cracking and its uses |
| CN101234764B (en) * | 2007-01-31 | 2011-01-19 | 中国石油化工股份有限公司石油化工科学研究院 | Method of preparing MFI structure molecular sieve containing phosphorus and transition metal |
| CN101619011B (en) * | 2008-06-30 | 2012-07-25 | 中国石油化工股份有限公司 | Method for producing ethylene and propylene by catalytic cracking |
| CN102008939A (en) * | 2010-11-15 | 2011-04-13 | 西北农林科技大学 | Method for preparing aluminum-manganese composite oxide modified molecular sieve |
| CN102008939B (en) * | 2010-11-15 | 2012-07-25 | 西北农林科技大学 | Method for preparing aluminum-manganese composite oxide modified molecular sieve |
| CN103084202A (en) * | 2012-11-28 | 2013-05-08 | 淮南师范学院 | Method for preparing composite catalyst for loaded nano zeolite seed crystal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100486702C (en) | 2009-05-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1156555C (en) | Assistant for calalytic cracking and its preparing process | |
| CN102049290B (en) | RFCC high octane gasoline additive and preparation method thereof | |
| CN102851058A (en) | Method for increasing octane number of catalytically cracked gasoline | |
| CN107304375A (en) | A kind of catalytic diesel oil conversion process catalyst grade matches somebody with somebody process | |
| CN1125005C (en) | Process for processing low-carbon paraffin | |
| CN100554229C (en) | The method of naphtha catalytic pyrolysis preparing ethylene propylene | |
| CN103301870A (en) | Preparation method for catalytic cracking cocatalyst | |
| CN1632061A (en) | Selective cracking catalyst for producing low carbon olefin | |
| CN1730614A (en) | Catalytic cracking catalyst and its preparation method | |
| CN106179470A (en) | A kind of catalytic cracking improves the preparation method of octane number auxiliary agent | |
| CN100417713C (en) | Hydrocracking catalyst for Tscher-Topsch synthesis of heavy wax, its preparation method and application thereof | |
| CN102228839B (en) | Silicon-aluminum dual binding agent vanadium-resisting additive and preparation method thereof | |
| CN102114429B (en) | Method for improving B acid content of ZSM-5 molecular sieve and realizing yield increase of light olefin | |
| CN108479846B (en) | Aromatization catalyst, preparation method, regeneration method and aromatization method thereof | |
| US11097263B2 (en) | Aromatization catalyst, preparation method, regeneration method thereof, and aromatization method | |
| CN100429293C (en) | Process for preparing catalytic cracking catalyst | |
| CN1966147A (en) | Catalyst for producing benzene, toluene and xylene and coupled production of low carbon olefin | |
| CN112473731B (en) | Catalytic cracking catalyst containing Y and BEA structure molecular sieves, and preparation method and application method thereof | |
| CN110479362B (en) | Catalyst for high yield of diesel oil and low carbon olefin, and preparation method and application thereof | |
| CN115041223B (en) | Preparation method of catalyst for preparing low-carbon olefin by directly catalyzing and cracking crude oil | |
| CN114181737A (en) | Method for producing light aromatic hydrocarbon and clean gasoline component from inferior gasoline | |
| CN1298684C (en) | Process for preparing octaene by butene oligomerization | |
| CN113322093B (en) | Catalytic cracking method | |
| CN111718751B (en) | Method for preparing aromatic hydrocarbon and light oil by catalytic conversion of straight-run diesel oil | |
| CN103509588B (en) | A kind of for containing the stock oil low-carbon olefines high-output of naphthenic ring and the cracking method of light aromatic hydrocarbons more |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090513 |