CN104926582A - Preparation method of low-naphthalene aromatic solvent - Google Patents
Preparation method of low-naphthalene aromatic solvent Download PDFInfo
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- CN104926582A CN104926582A CN201510269189.9A CN201510269189A CN104926582A CN 104926582 A CN104926582 A CN 104926582A CN 201510269189 A CN201510269189 A CN 201510269189A CN 104926582 A CN104926582 A CN 104926582A
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Abstract
The invention discloses a preparation method of a low-naphthalene aromatic solvent. The preparation method comprises the following steps of introducing a C10 heavy aromatic material into a decompression distilling column, controlling the condition of the decompression distilling tower, and producing the low-naphthalene aromatic solvent at the top of the tower. The preparation method disclosed by the invention has the beneficial effects that the process flow is simple, and by reasonable arrangement of the distillation process, the content of the naphthalene in GF-S1500 aromatic solvent is obviously reduced; after being sprayed by pesticide dissolved by the low-naphthalene aromatic solvent, residual naphthalene on agricultural crops can be avoided. The preparation method has the advantages of good use effect and high safety and the like.
Description
Technical field
The present invention relates to C
10heavy aromatics field of comprehensive utilization, particularly relates to a kind of preparation method of low naphthalene aromatic solvent.
Background technology
GF-S series of aromatic hydrocarbon solvent is with C
9, C
10heavy aromatics is raw material, with reference to special aromatic solvent standard development and production in the world, have that solvency power is strong, toxicity is low, smell is little, not chloride and heavy metal, the advantage such as boiling point is high, volatility is slow, be mainly used in the industries such as coating, agricultural chemicals, plastics, paint of coating.
Because GF-S series of aromatic hydrocarbon solvent has good gradient solubility property for most of agricultural chemicals, also fabulous mutual solubility is had with farm chemical emulgent monomer, by the missible oil of its configuration, there is flash-point high, evaporation rate is slow, the features such as perviousness is strong, therefore, often GF-S series of aromatic hydrocarbon solvent is used as farm chemical emulgent, drops in the drug effect improving agricultural chemicals dead time on plant or insect table body to extend pesticide liquid.But the naphthalene content of existing GF-S series of aromatic hydrocarbon solvent is higher, is about the 7-8% of GF-S series of aromatic hydrocarbon weight of solvent.As everyone knows, naphthalene is a kind of poisonous and have the aromatic hydroxy compound of special odor, and after if be used as by the GF-S series of aromatic hydrocarbon solvent of existing high naphthalene content, pesticide solvent sprays, naphthalene can remain in plant surface, affects quality and the security of agricultural-food.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of preparation method of low naphthalene aromatic solvent, can solve the shortcoming that existing agricultural aromatic solvent naphthalene content is high, improves the safety in utilization of aromatic solvent.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: the preparation method providing a kind of low naphthalene aromatic solvent, its preparation technology is: by C
10heavy aromatics raw material is introduced in vacuum rectification tower, controls the condition of vacuum rectification tower, low naphthalene aromatic solvent described in overhead extraction.
In a preferred embodiment of the present invention, described rectifying condition is: tower top temperature 125 ~ 135 DEG C, column bottom temperature 170 ~ 205 DEG C, vacuum tightness 10 ~ 18KPa, quantity of reflux 700 ~ 3000kg/h.
In a preferred embodiment of the present invention, the filler of described rectifying tower is wire cloth.
In a preferred embodiment of the present invention, the tower diameter of described rectifying tower is 1800mm, and tower height is 32300mm.
In a preferred embodiment of the present invention, the primary quality measure of described aromatic solvent is: outward appearance: colourless transparent liquid, initial boiling point: > 180 DEG C, 98% flows out temperature: < 210 DEG C, density when 20 DEG C: 0.875 ~ 0.905g/cm
3, close flash point:>=63 DEG C, aromaticity content>=98.5%, aniline point: 17.
The invention has the beneficial effects as follows: the preparation method of a kind of low naphthalene aromatic solvent of the present invention, its technical process is simple, by the reasonable setting of rectification process, significantly reduce the naphthalene content in GF-S1500 aromatic solvent, after the pesticide spraying dissolved by this low naphthalene aromatic solvent, can not on farm crop residual naphthalene, there is result of use good, security advantages of higher.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the preparation method of a kind of low naphthalene aromatic solvent of the present invention.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
Refer to Fig. 1, the embodiment of the present invention comprises:
Embodiment 1
By C
10heavy aromatics raw material 8000 tons is introduced through pipeline 1 vacuum rectification tower that diameter is 1.8m, tower height is 32.3m, filler is wire cloth and is carried out rectifying, controlling tower top temperature is 125 DEG C, in tower, vacuum tightness is 10KPa, quantity of reflux is 700kg/h, control temperature at the bottom of tower is 170 DEG C, at tower top through low naphthalene aromatic solvent described in pipeline 2 extraction, other aromatic solvents of side line pipeline 3 extraction, kettle base solution introduces next stage rectifying tower through pipeline 4.After testing, the primary quality measure of gained aromatic solvent is outward appearance: colourless transparent liquid, initial boiling point: > 180 DEG C, and 98% flows out temperature: < 210 DEG C, density when 20 DEG C: 0.875 ~ 0.905g/cm
3, close flash point:>=63 DEG C, aromaticity content>=98.5%, aniline point: 17; Gained aromatic solvent containing naphthalene amount be 0.087%.
Embodiment 2:
By C
10heavy aromatics raw material 7800 tons is introduced through pipeline 1 vacuum rectification tower that diameter is 1.8m, tower height is 32.3m, filler is wire cloth and is carried out rectifying, controlling tower top temperature is 135 DEG C, in tower, vacuum tightness is 18KPa, quantity of reflux is 3000kg/h, control temperature at the bottom of tower is 205 DEG C, tower top is through low naphthalene aromatic solvent described in pipeline 2 extraction, and other aromatic solvents of side line pipeline 3 extraction, kettle base solution introduces next stage rectifying tower through pipeline 4.After testing, the primary quality measure of gained aromatic solvent is outward appearance: colourless transparent liquid, initial boiling point: > 180 DEG C, and 98% flows out temperature: < 210 DEG C, density when 20 DEG C: 0.875 ~ 0.905g/cm
3, close flash point:>=63 DEG C, aromaticity content>=98.5%, aniline point: 17; Gained aromatic solvent containing naphthalene amount be 0.066% of aromatic solvent weight.
Embodiment 3:
By C
10heavy aromatics raw material 7600 tons is introduced through pipeline 1 vacuum rectification tower that diameter is 1.8m, tower height is 32.3m, filler is wire cloth and is carried out rectifying, controlling tower top temperature is 130 DEG C, in tower, vacuum tightness is 15KPa, quantity of reflux is 2000kg/h, control temperature at the bottom of tower is 190 DEG C, at tower top through low naphthalene aromatic solvent described in pipeline 2 extraction, other aromatic solvents of side line pipeline 3 extraction, kettle base solution introduces next stage rectifying tower through pipeline 4.After testing, the primary quality measure of gained aromatic solvent is outward appearance: colourless transparent liquid, initial boiling point: > 180 DEG C, and 98% flows out temperature: < 210 DEG C, density when 20 DEG C: 0.875 ~ 0.905g/cm
3, close flash point:>=63 DEG C, aromaticity content>=98.5%, aniline point: 17; Gained aromatic solvent containing naphthalene amount be 0.078% of aromatic solvent weight.
Low naphthalene aromatic solvent described in embodiment 1-3 is GF-S1500 aromatic solvent, and other aromatic solvents of described side take-off are GF-S1800 aromatic solvent, and the naphthalene content in GF-S1800 aromatic solvent is the 7-8% of aromatic solvent weight.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. a preparation method for low naphthalene aromatic solvent, is characterized in that, its preparation technology is: by C
10heavy aromatics raw material is introduced in vacuum rectification tower, controls the condition of vacuum rectification tower, low naphthalene aromatic solvent described in overhead extraction.
2. the preparation method of a kind of low naphthalene aromatic solvent according to claim 1, it is characterized in that, described rectifying condition is: tower top temperature 125 ~ 135 DEG C, column bottom temperature 170 ~ 205 DEG C, vacuum tightness 10 ~ 18KPa, quantity of reflux 700 ~ 3000kg/h.
3. the preparation method of a kind of low naphthalene aromatic solvent according to claim 1, is characterized in that, the filler of described rectifying tower is wire cloth.
4. the preparation method of a kind of low naphthalene aromatic solvent according to claim 1, is characterized in that, the tower diameter of described rectifying tower is 1800mm, and tower height is 32300mm.
5. the preparation method of a kind of low naphthalene aromatic solvent according to claim 1, it is characterized in that, the primary quality measure of described aromatic solvent is: outward appearance: colourless transparent liquid, initial boiling point: > 180 DEG C, 98% flows out temperature: < 210 DEG C, density when 20 DEG C: 0.875 ~ 0.905g/cm
3, close flash point:>=63 DEG C, aromaticity content>=98.5%, aniline point: 17.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510269189.9A CN104926582A (en) | 2015-05-25 | 2015-05-25 | Preparation method of low-naphthalene aromatic solvent |
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| CN201510269189.9A CN104926582A (en) | 2015-05-25 | 2015-05-25 | Preparation method of low-naphthalene aromatic solvent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108055792A (en) * | 2017-11-09 | 2018-05-18 | 建业科技电子（惠州）有限公司 | A kind of segmentation gold finger plate wet film production method |
| CN108531210A (en) * | 2018-03-05 | 2018-09-14 | 常熟联邦化工股份有限公司 | A kind of preparation method of high methyl naphthalene aromatic solvent naphtha |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250084A (en) * | 2008-04-01 | 2008-08-27 | 常熟市联邦化工有限公司 | Method for preparing petroleum naphthalene by using C+10 heavy aromatic hydrocarbon as raw material |
-
2015
- 2015-05-25 CN CN201510269189.9A patent/CN104926582A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250084A (en) * | 2008-04-01 | 2008-08-27 | 常熟市联邦化工有限公司 | Method for preparing petroleum naphthalene by using C+10 heavy aromatic hydrocarbon as raw material |
Non-Patent Citations (2)
| Title |
|---|
| 张广林: "《溶剂油》", 31 March 1995 * |
| 甘敏: "C10重芳烃综合利用工艺技术", 《化工设计》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108055792A (en) * | 2017-11-09 | 2018-05-18 | 建业科技电子（惠州）有限公司 | A kind of segmentation gold finger plate wet film production method |
| CN108531210A (en) * | 2018-03-05 | 2018-09-14 | 常熟联邦化工股份有限公司 | A kind of preparation method of high methyl naphthalene aromatic solvent naphtha |
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Application publication date: 20150923 |