CN109232154A - A kind of n-alkane preparation method of hexadecane - Google Patents
A kind of n-alkane preparation method of hexadecane Download PDFInfo
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- CN109232154A CN109232154A CN201811233004.9A CN201811233004A CN109232154A CN 109232154 A CN109232154 A CN 109232154A CN 201811233004 A CN201811233004 A CN 201811233004A CN 109232154 A CN109232154 A CN 109232154A
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- alkane
- reaction
- catalyst
- preparation
- reaction kettle
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/02—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation
- C07C5/03—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation of non-aromatic carbon-to-carbon double bonds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
Abstract
The present invention relates to n-alkane production fields, it is related to a kind of preparation method of n-alkane, include the following steps: (1) catalytic hydrogenation: 600g straight chain hexadecylene and 35 ~ 45g catalyst being added in hydrogenation reaction kettle after being mixed, reaction temperature is risen to 20 ~ 150 DEG C, keep hydrogen reaction pressure in 0.1 ~ 4MPa, after keeping the temperature 6 ~ 7h of successive reaction, hydrogen is closed into valve, cooling water is passed through toward the mixed material after reaction by the cooler pan pipeline of hydrogenation reaction kettle, cool to 50 DEG C, stop stirring, pressure release, and nitrogen is replaced；(2) it filters: the mixed material in (1) step being drawn off from hydrogenation reaction kettle outlet at bottom valve, the mixed material drawn off is filtered, and isolates catalyst and material；(3) material after separating catalyst in (2) step rectifying: is removed into the isolated n-alkane finished product of rectifying again.This preparation method provide it is a kind of it is easy to operate safely, be easily achieved, lower production costs, the n-alkane preparation method of high conversion rate.
Description
Technical field
The present invention relates to n-alkane production fields, in particular to a kind of preparation method of n-alkane.
Technical background
N-alkane has been obtained as one of diesel oil, low temperature improvement and key component of environmental protection liquid fuel composition
To being widely applied.At present since the source of n-alkane is different, keeps the composition of its all kinds of n-alkane different, lead to product
Quality has different degrees of difference.
Presently, there are N-alkanes the preparation method is as follows:
One, it takes molecular sieve absorption or urea dewaxing separation to prepare the mixture of n-alkane, then carries out segmentation freezing again, divides
From n-alkane monomer
Two, it takes wurtz reaction alkyl halide to react with metallic sodium and prepares symmetrical n-alkane
Three, it is prepared using zinc powder reduction alkane iodide in acid medium
Four, it is prepared by raw material direct hydrogenation deoxidation of vegetable oil
Five, it is prepared by raw material direct hydrogenation decarboxylation of vegetable oil
Wherein one process conditions of method are more complicated, and the high requirements on the equipment, scale of investment is big, are suitable for extensive petrochemical iy produced；
Method two reacts fierce, and operational danger is big；Three prices of raw materials of method are expensive, do not have productive value；Method four, five is in height
Reacted under warm high pressure, reaction condition is harsher, be suitable for large-scale continuous production, have raw material be easy to get but cost compared with
It is high.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of n-alkane preparation side of hexadecane
Method.This preparation method provide it is a kind of it is easy to operate safely, be easily achieved, lower production costs, the N-alkanes of high conversion rate
Hydrocarbon preparation method.
To achieve the goals above, the present invention provides following technical solution, a kind of n-alkane preparation sides of hexadecane
Method includes the following steps:
(1) catalytic hydrogenation: 600g straight chain hexadecylene and 35 ~ 45g catalyst are added in hydrogenation reaction kettle after being mixed, are risen anti-
It answers temperature to 20 ~ 150 DEG C, keeps hydrogen reaction pressure in 0.1 ~ 4MPa, after keeping the temperature 6 ~ 7h of successive reaction, close hydrogen into valve
Door is passed through cooling water toward the mixed material after reaction by the cooler pan pipeline of hydrogenation reaction kettle, cools to 50 DEG C, stop stirring
It mixes, pressure release, and nitrogen is replaced；
(2) it filters: the mixed material in (1) step being drawn off from hydrogenation reaction kettle outlet at bottom valve, the mixed material drawn off
It is filtered, isolates catalyst and material；
(3) material after separating catalyst in (2) step rectifying: is removed into the isolated n-alkane finished product of rectifying again.
Preferably, the palladium carbon or nickel that the catalyst is 1 ~ 10%.
Preferably, the reaction temperature in the step (1) is 70 ~ 80 DEG C.
Preferably, the reaction pressure in the step (1) is 0.4 ~ 1MPa.
The present invention has an advantage that the present invention replaces urea dewaxing, vegetable oil etc. adding hydrogen anti-using straight chain hexadecylene
Successive reaction in kettle is answered, the material after reaction passes through the isolated n-alkane of catalyst rectifying；Entire production preparation process pair
Equipment requirement and process conditions do not have higher particular/special requirement, simple process, it is easy to accomplish, olefin conversion is up to 94.2%,
And catalyst is recyclable applies during the filtration process.
Each component raw material in the present invention is low in cost, and is easy to obtain, and the production cost for greatly reducing enterprise is suitable
It closes and promotes and applies.
Detailed description of the invention
Fig. 1 is reaction process flow chart of the invention.
Specific embodiment
Referring to Fig.1 it is shown to achieve the goals above, the present invention provides following technical solution, a kind of positive structure of hexadecane
Alkane preparation method, includes the following steps:
(1) catalytic hydrogenation: 600g straight chain hexadecylene and 35 ~ 45g catalyst 4 are added in hydrogenation reaction kettle after being mixed, are risen
Reaction temperature keeps hydrogen reaction pressure in 0.1 ~ 4MPa to 20 ~ 150 DEG C, after keeping the temperature 6 ~ 7h of successive reaction, closes hydrogen into valve
Door is passed through cooling water toward the mixed material after reaction by the cooler pan pipeline of hydrogenation reaction kettle, cools to 50 DEG C, stop stirring
It mixes, pressure release, and nitrogen is replaced；
(2) it filters: the mixed material in (1) step being drawn off from hydrogenation reaction kettle outlet at bottom valve, the mixed material drawn off
It is filtered, isolates catalyst and material；
(3) material after separating catalyst in (2) step rectifying: is removed into the isolated n-alkane finished product of rectifying again.
The palladium carbon or nickel that the catalyst is 1 ~ 10%.
Reaction temperature in the step (1) is 70 ~ 80 DEG C.
Reaction pressure in the step (1) is 0.4 ~ 1MPa.
Through analyzing, olefin conversion 94.2%.
Using straight chain hexadecylene as raw material, hydrogenated obtained hexadecane obtains finished product after rectifying.Reaction molecular formula:
By using above-mentioned technical proposal, embodiment one:
Hexadecylene, palladium-carbon catalyst about 40g are added in hydrogenation reaction kettle.Nitrogen, hydrogen are replaced three times respectively, are heated up after opening stirring
To 70 DEG C, Hydrogen Vapor Pressure 8atm is maintained, keeps the temperature successive reaction.Reaction stopping, about 6h when being no longer consumed to hydrogen, close hydrogen into
Mouth valve.It is passed through cooling water toward cooling coil, cools to 50 DEG C.Stop stirring, pressure release, nitrogen displacement.Reacted material is from anti-
Answer device outlet at bottom valve discharging.After feed separation catalyst, rectifying is gone to separate alkane.Through analyzing, olefin conversion 94.2%.
Embodiment two:
Hexadecylene, Raney nickel about 40g are added in hydrogenation reaction kettle.Nitrogen, hydrogen are replaced three times respectively, are warming up to after opening stirring
150 DEG C, Hydrogen Vapor Pressure 1MPa is maintained, keeps the temperature successive reaction.Reaction stopping, about 6h when being no longer consumed to hydrogen, close hydrogen into
Mouth valve.It is passed through cooling water toward cooling coil, cools to 50 DEG C.Stop stirring, pressure release, nitrogen displacement.Reacted material is from anti-
Answer device outlet at bottom valve discharging.After feed separation catalyst, rectifying is gone to separate alkane.Through analyzing, olefin conversion 94.2%.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of n-alkane preparation method of hexadecane, which comprises the steps of:
(1) catalytic hydrogenation: 600g straight chain hexadecylene and 35 ~ 45g catalyst are added in hydrogenation reaction kettle after being mixed, are risen anti-
It answers temperature to 20 ~ 150 DEG C, keeps hydrogen reaction pressure in 0.1 ~ 4MPa, after keeping the temperature 6 ~ 7h of successive reaction, close hydrogen into valve
Door is passed through cooling water toward the mixed material after reaction by the cooler pan pipeline of hydrogenation reaction kettle, cools to 50 DEG C, stop stirring
It mixes, pressure release, and nitrogen is replaced；
(2) it filters: the mixed material in (1) step being drawn off from hydrogenation reaction kettle outlet at bottom valve, the mixed material drawn off
It is filtered, isolates catalyst and material；
(3) material after separating catalyst in (2) step rectifying: is removed into the isolated n-alkane finished product of rectifying again.
2. a kind of n-alkane preparation method of hexadecane according to claim 1, it is characterised in that: the catalyst be 1 ~
10% palladium carbon or nickel.
3. a kind of n-alkane preparation method of hexadecane according to claim 1, it is characterised in that: in the step (1)
Reaction temperature is 70 ~ 80 DEG C.
4. according to a kind of n-alkane preparation method of any hexadecane of Claims 2 or 3, it is characterised in that: the step
(1) reaction pressure in is 0.4 ~ 1MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811233004.9A CN109232154A (en) | 2018-10-23 | 2018-10-23 | A kind of n-alkane preparation method of hexadecane |
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| CN201811233004.9A CN109232154A (en) | 2018-10-23 | 2018-10-23 | A kind of n-alkane preparation method of hexadecane |
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| CN109232154A true CN109232154A (en) | 2019-01-18 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0914867A1 (en) * | 1997-11-06 | 1999-05-12 | Enichem S.p.A. | Process for the hydrogenation of diene (co)polymers |
| CN103102870A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Phase-change material and preparation method thereof with natural acid as raw material |
-
2018
- 2018-10-23 CN CN201811233004.9A patent/CN109232154A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0914867A1 (en) * | 1997-11-06 | 1999-05-12 | Enichem S.p.A. | Process for the hydrogenation of diene (co)polymers |
| CN103102870A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Phase-change material and preparation method thereof with natural acid as raw material |
Non-Patent Citations (5)
| Title |
|---|
| J.E.杰马茵: "《烃类的催化转化》", 30 November 1976, 石油化学工业出版社 * |
| T. I. AKCHURIN ET AL: "Alkene Hydrogenation over Palladium Supported on a Carbon–Silica Material", 《KINETICS AND CATALYSIS》 * |
| 化学工业部第四设计院: "《化工设备设计全书 钛制化工设备设计》", 30 November 1985, 上海科学技术出版社 * |
| 荣国斌，苏克曼: "《大学有机化学基础》", 31 July 2001, 华东理工大学出版社 * |
| 陆柱: "《水处理技术》", 31 August 2006, 华东理工大学出版社 * |
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Application publication date: 20190118 |