CN105294940B - Method for removing mercaptan from coumarone resin - Google Patents
Method for removing mercaptan from coumarone resin Download PDFInfo
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- CN105294940B CN105294940B CN201410283274.6A CN201410283274A CN105294940B CN 105294940 B CN105294940 B CN 105294940B CN 201410283274 A CN201410283274 A CN 201410283274A CN 105294940 B CN105294940 B CN 105294940B
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Abstract
The invention provides a method for removing mercaptan from coumarone resin, which sequentially comprises the following steps: distilling, acid washing, decolorizing, polymerizing, flash evaporating and granulating, wherein air is blown in before the distilling stepA step of; sequentially adding H after the acid washing step2O2Washing and NaClO washing steps. The invention provides a method for removing mercaptan from coumarone resin, which is characterized in that air blowing and H are added to the coumarone production process of the existing coal chemical industry system2O2And NaClO washing process, remove the mercaptan in the raw materials, the peculiar smell of the resin has been reduced greatly, the mercaptan content is reduced from 60-90ppm to 20-25ppm before and after implementing; the technology is simple to operate and has obvious effect.
Description
Technical field
The invention belongs to chemical fields, are related to a kind of low peculiar smell coumarone indene resin production technology of coal chemical industry system, specifically relate to
A kind of and method of coumarone indene resin removal of mercaptans.
Background technology
The mercaptans content of low peculiar smell coumarone indene resin is low, and added value is high, is mainly used for high-end binding agent field.And it is current,
The coal chemical industry system coumarone mercaptans content of the prior art is in 60-100ppm, and smell is larger, and color is deep, and added value is low.
Through retrieving in the prior art the mainly removal of mercaptans method and desulfurizing agent of catalytically cracked gasoline.
The catalytic gasoline fixed bed alkaline-free sweetening method having disclosed, it is open a kind of for petrochemical technology
The catalytic gasoline fixed bed alkaline-free sweetening method in field adds mainly before catalytically cracked gasoline enters mercaptan oxidation tower
The activator that alcohols, guanidine and mercaptan-eliminating catalyst mix is entered, activator can be with macromolecular sulphur in gasoline using guanidine
Alcohol is mutually complexed so that the mercaptan in gasoline is easier by Phthalocyanine-like Catalysts catalytic eliminating, and phthalocyanine-like compound is in guanidine
Solubility be more than its solubility in quaternary ammonium base, activation effect is more preferable, and mercaptan-eliminating catalyst used can make in gasoline
Mercaptan more fully contacted with catalyst, and the mercaptan-eliminating catalyst in activator also is able to supplement to a certain extent
Catalyst loss in removal of mercaptans tower in fixed bed finally enables the removal of mercaptans sulphur in catalytically cracked gasoline remove thorough, with
Existing alkali washing process is compared, and removal of mercaptans effect is good, at low cost, is significantly reduced spent lye discharge, is protected environment.
The method for the demercaptaning for gasoline by catalyst cracking having disclosed is related to a kind of improved fixed bed process removing catalytic cracking
The technique of mercaptan from gasoline, it replaces activated carbon as carrier, gold-supported using the activated carbon fibre that absorption property is good, intensity is higher
Belong to salt and make catalyst, removal of mercaptans processing is carried out to catalytically cracked gasoline.The method of the present invention treatment effeciency is high, effect is good, uses the longevity
Life length.The sulfur in gasoline alcohol content handled through the method for the present invention can be down to below 10ppm, can usually be down to 2-3ppm.
The sweetening agent combination having disclosed includes：First component, one kind in quaternary ammonium base He quaternary phosphonium hydroxide or
Several mixtures, the first component are 0.1wt%~50wt% of sweetening agent combination total weight；Second component, is selected from
Monoethanolamine, diethanol amine, methyl diethanolamine, diglycolamine, diisopropanolamine (DIPA), ethylenediamine, propane diamine, butanediamine, N- first
The mixture of one or more of morpholide, N-Methyl pyrrolidone, methanol, ethyl alcohol and ethylene glycol, the second component are desulfurization
0.1wt%~98wt% of alcohol agent composition total weight；Water, water are the surplus of sweetening agent combination total weight.The present invention is de-
Mercaptan agent does not use sodium hydroxide solution, the discharge of no alkaline residue, and can steam stripping regeneration, oxidation regeneration is not required to, available for producing without corruption
The oil liquefied gas and light petrol (80 DEG C of boiling point ＜) of corrosion super-low sulfur, liquefied petroleum gas and light petrol total sulfur content can be down to 5 μ
Below gg-1.
A kind of method of removing mercaptan from gasoline having disclosed is related to a kind of method for removing mercaptan from gasoline.It will contain
The FCC gasoline for having C4~C12 fractions is sent into together with suitable hydrogen in fixed bed reactors, makes mercaptan and diene in gasoline
The higher sulfide of hydrocarbon reaction generation boiling point, the product after reaction enter the catalytic distillation for being filled with removal of mercaptans bifunctional catalyst
In tower, the mercaptan in light petrol is removed, the sulfide of generation is reacted and heavy distillat is fractionated into effect and is discharged together from bottom of towe.
Report about coumarone indene resin removal of mercaptans is considerably less.It researchs and proposes at present using fixed bed catalytic oxidation method.
Raw material enters fixed bed, is being passed through air, under conditions of catalyst under, mercaptan is converted into disulphide, disulphide dissolving
In hydrocarbon ils, to reach the method for removing mercaptan.Coal chemical industry system coumarone production technology is mainly by distillation, acid in the prior art
It washes, decolourize, polymerizeing, flashing, being granulated six process compositions.It is using fixed bed catalytic oxidation method removal of mercaptans main problem and defect
Catalyst such as poly- titanium mountain valley with clumps of trees and bamboo cobalt of high cost；Because impurity is more in raw material, easily cause catalyst poisoning；Product odour is larger, adds
It is worth relatively low.
Invention content
To solve the above problems, the purpose of the present invention is to provide a kind of method of coumarone indene resin removal of mercaptans, this method
It is in the coumarone production technology of existing coal chemical industry system, air, H are blown in increase2O2With NaClO washing process, remove in raw material
Mercaptan reduces peculiar smell, produces the low peculiar smell coumarone indene resin that a kind of mercaptans content is less than 30ppm；The technical operation is simple, effect
Fruit is notable.
The technical solution of the present invention is as follows：A kind of method of coumarone indene resin removal of mercaptans, in turn includes the following steps：
Distillation, pickling, decoloration, polymerization, flash distillation, granulation, which is characterized in that the addition before the distilation steps blasts air step；
H is sequentially added after the acid pickling step2O2Washing, NaClO washing steps.
The method of coumarone indene resin removal of mercaptans according to the present invention, the method are：
(1) after blasting air in raw material heavy benzol slot, raw material enters distillation column distillation in raw material heavy benzol slot, removes heavy constituent
Impurity, tower top obtain thick coumarone fraction；
(2) thick coumarone fraction enters descaling bath, successively through dilute sulfuric acid cycle pickling, H2O2Cycle washing, NaClO cycles
Washing obtains acid-refined oil, and acid-refined oil enters bleaching tower decoloration, and tower top obtains bleached oil；
(3) bleached oil is in catalyst BF3, polymerase 10 .5-2h is carried out at 50-150 DEG C of temperature and obtains godied oil；
(4) godied oil enters back into flash column and carries out vacuum distillation removing light component, and obtained oil is obtained by cooling granulation
Low peculiar smell coumarone indene resin.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that blast air step described
Air velocity be 1-5m3/h。
The method of coumarone indene resin removal of mercaptans according to the present invention, it is further preferred that, blast air described
Air velocity in step is 3-4m3/h。
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that in the H2O2It is used in washing step
30-50%H2O2Solution recycles acid-refined oil and washs.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that in the NaClO washing steps
Acid-refined oil is recycled with 30-50%NaClO solution and is washed.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is further preferred that, it is washed in the NaClO
Acid-refined oil is recycled with 35-38%NaClO solution in step and is washed.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that the H2O2Washing, NaClO washings
The wash temperature of step is 20-100 DEG C.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is further preferred that, the H2O2Washing,
The wash temperature of NaClO washing steps is 85-95 DEG C.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that in the distilation steps, distillation
100-200 DEG C of the tower top temperature of tower, 200-400 DEG C of column bottom temperature.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is further preferred that, in the distilation steps
In, 180-190 DEG C of the tower top temperature of destilling tower, 240-270 DEG C of column bottom temperature.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that in the acid pickling step, use
The dilute sulfuric acid cycle pickling 5-30h of 20-50%.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that in the decolorization process, pressure
For 30-40kPa, decolourize 80-200 DEG C of column overhead temperatures, 120-250 DEG C of column bottom temperature.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is further preferred that, in the decolorization process
In, pressure 30-40kPa, decolourize 120-130 DEG C of column overhead temperatures, 190-200 DEG C of column bottom temperature.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is preferred that in the flash steps, pressure
For 10-50Kpa, 50-150 DEG C of tower top temperature, 150-250 DEG C of column bottom temperature.
The method of coumarone indene resin removal of mercaptans according to the present invention, it is further preferred that, in the flash steps
In, pressure 10-50Kpa, 130-140 DEG C of tower top temperature, 190-210 DEG C of column bottom temperature.
The method of coumarone indene resin removal of mercaptans of the present invention blasts air, air velocity 1- in raw material heavy benzol slot
5m3/ h, because material temperature is between 40-80 DEG C, certain oxidation mercaptan can be played the role of by blasting air, and mercaptan is switched to easily
The sulfide gas of volatilization.Subsequently into destilling tower, under normal pressure, 100-200 DEG C of tower top temperature, column bottom temperature 200- are controlled
Impurity, the tower tops such as naphtalene oil, the pitch of 400 DEG C of removing heavy constituents obtain thick coumarone fraction；The purpose of distillation is mainly deviate from former
The heavy constituent such as impurity such as naphtalene oil, pitch, these substances in material can influence color of resin and taste.Thick coumarone fraction enters acid
Washing trough, at normal temperatures, using the dilute sulfuric acid cycle pickling 5-30h of 20-50%, pickling is mainly to utilize sulfuric acid and the pyrrole in raw material
Pyridine salt base class impurity reacts, and because can the impurity be effectively deviate from, is directly related to the color of tree value.Then in normal pressure, reaction temperature
At 20-100 DEG C of degree, using 30-50%H2O2, 30-50%NaClO solution to acid-refined oil recycle wash；Mainly utilize two kinds of objects
Mercaptan oxidation is achieved the purpose that deviate from mercaptan by the oxidisability of matter.Then material enters bleaching tower, in 30-40kPa, tower top temperature
80-200 DEG C of degree is distilled at 120-250 DEG C of column bottom temperature, and the impurity such as naphtalene oil etc. in material, tower are further removed with this
Top obtains bleached oil.Bleached oil is in catalyst BF3, polymerase 10 .5-2h is carried out at 50-150 DEG C and obtains godied oil.Godied oil enters
Flash system, in 10-50Kpa, 50-150 DEG C of tower top temperature is evaporated under reduced pressure at 150-250 DEG C of column bottom temperature, and abjection does not gather
The light component of conjunction, the ingredient of light component include benzene, dimethylbenzene, indenes etc., and obtained oil obtains low peculiar smell Gu horse by cooling granulation
Grand resin.
The present invention is on the basis of existing coal chemical industry system coumarone production technology, increases drum air, H2O2 washings, NaClO
Washing process.It is specific as follows：It is different that sky is blasted in raw material heavy benzol slot, is then distilled again, obtains the enrichment of coumarone component
Fraction.The fraction uses the dilute sulfuric acid cycle pickling of 20-50%, obtains the few acid-refined oil of pyridiniujm base class impurity.Acid-refined oil is adopted
Use 30-50%H2O2, the washing of 30-50%NaClO solution, it is then miscellaneous through the remaining a small amount of acid tar oil class of (distillation) removing of decolourizing again
Matter.Bleached oil after decoloration carries out polymerisation under catalyst BF3 effects, and obtained godied oil is again through light group of flash distillation abjection
Point, it is finally granulated to obtain the low peculiar smell coumarone indene resin that mercaptans content is less than 30ppm.
Present invention focuses on air hose is increased in raw material trench bottom, constantly air is blasted to slot bottom.It is filled in sulfuric acid washing
It postpones, increases H2O2Slot and NaClO slots.Raw material after pickling is under 20-100 DEG C of certain temperature respectively through H2O2 slots and NaClO
Washing.It finally obtains to obtain the low peculiar smell coumarone indene resin that mercaptans content is less than 30ppm.
The raw material of heavy benzol slot of the present invention is heavy benzol, and composition includes benzene, dimethylbenzene, indenes, coumarone, styrene etc..
Product odor test method of the present invention is automatic potentiometric titration analytic approach.Determining instrument is surveyed for FJA-05 types mercaptan sulfur
Determine instrument assay method：Sample is dissolved in the isopropanol solvent of sodium acetate according to the GB/T1792-88 test methods provided, is used
Silver nitrate alcohol standard solution carries out constant-current titration, makees reference electrode with pH glass electrodes, and mercaptan sulfur electrode is as indicator electrode, and two
Potential break instruction titration end-point between electrode.In titration process, mercaptan sulfur is precipitated as mercaptan silver.According to titration results,
Obtain mercaptans content in sample.
The technology of the present invention mainly uses lower-cost air, NaClO and H2O2Oxygen is carried out to mercaptan at a certain temperature
Change, achieve the purpose that deviate from mercaptan.The problem of avoiding catalyst of high cost and easy poisoning.
The beneficial technique effect of the present invention：
The method of coumarone indene resin removal of mercaptans provided by the invention, this method are the coumarone production in existing coal chemical industry system
In technique, air, H are blown in increase2O2With NaClO washing process, the mercaptan in raw material is removed, the peculiar smell of resin has obtained very big drop
Low, mercaptans content is down to 20-25ppm from 60-90ppm before and after implementation；The technical operation is simple, significant effect.
Description of the drawings
Fig. 1 is the process flow chart of the method for coumarone indene resin removal of mercaptans provided by the invention.
In figure：1- heavy benzol slots, 2- destilling towers, 3- acid dip pickles, 4- bleaching towers, 5- polyplants, 6- flash distillation 1# towers, 7- dodge
Steam 2# towers, 8- prilling granulators.
Specific embodiment
The present invention is further elaborated below, it will be appreciated by those skilled in the art that the embodiment is given for example only,
Without forming any restrictions to the present invention.
Embodiment 1：The method of coumarone indene resin removal of mercaptans
Increase a pipeline in heavy benzol slot bottom, 3m is persistently blasted into slot using wind turbine3The air of/h.Heavy benzol enters steaming
Tower is evaporated, under normal pressure, controls 180 DEG C of tower top temperature, 240 DEG C of removing heavy constituents of column bottom temperature
Impurity, the tower top such as naphtalene oil, pitch obtain thick coumarone fraction.Thick coumarone fraction enters descaling bath, in room temperature
Under, using 25% dilute sulfuric acid cycle pickling for 24 hours.H is newly increased after pickling zone2O2With NaClO sinks,
Material after pickling is at normal pressure, 80 DEG C of reaction temperature, using 32%H2O2, 35%NaClO solution recycles wash respectively
12h is washed, achievees the purpose that deviate from mercaptan.Washed material enters bleaching tower, in 35kPa, 120 DEG C of tower top temperature, bottom of towe temperature
It is distilled at 190 DEG C of degree, impurity such as naphtalene oil in material etc. is further removed with this, tower top obtains bleached oil.Bleached oil exists
Catalyst BF3 carries out polymerization 1.5h at 110 DEG C and obtains godied oil.Godied oil enters flash system, in 30Kpa, tower top temperature
It 140 DEG C, is evaporated under reduced pressure at 210 DEG C of column bottom temperature, obtained oil obtains coumarone indene resin by cooling granulation.
Embodiment 2：The method of coumarone indene resin removal of mercaptans
Increase a pipeline in heavy benzol slot bottom, 4m is persistently blasted into slot using wind turbine3The air of/h.Heavy benzol enters just
Tower is evaporated, under normal pressure, controls 190 DEG C of tower top temperature, 260 DEG C of removing heavy constituents of column bottom temperature
Impurity, the tower top such as naphtalene oil, pitch obtain thick coumarone fraction.Thick coumarone fraction enters descaling bath, in room temperature
Under, using 40% dilute sulfuric acid cycle pickling for 24 hours.H is newly increased after pickling zone2O2With NaClO sinks,
Material after pickling is at normal pressure, 75 DEG C of reaction temperature, using 30%H2O2, 38%NaClO solution recycles wash respectively
12h is washed, achievees the purpose that deviate from mercaptan.Washed material enters bleaching tower, in 40kPa, 130 DEG C of tower top temperature, bottom of towe temperature
It is distilled at 200 DEG C of degree, impurity such as naphtalene oil in material etc. is further removed with this, tower top obtains bleached oil.Bleached oil exists
Catalyst BF3 carries out polymerization 1h at 90 DEG C and obtains godied oil.Godied oil enters flash system, in 25Kpa, tower top temperature 130
DEG C, it is evaporated under reduced pressure at 190 DEG C of column bottom temperature, obtained oil obtains coumarone indene resin by cooling granulation.
Embodiment 3：The method of coumarone indene resin removal of mercaptans
Increase a pipeline in heavy benzol slot bottom, 2m is persistently blasted into slot using wind turbine3The air of/h.Heavy benzol enters just
Tower is evaporated, under normal pressure, controls 180 DEG C of tower top temperature, 270 DEG C of removing heavy constituents of column bottom temperature
Impurity, the tower top such as naphtalene oil, pitch obtain thick coumarone fraction.Thick coumarone fraction enters descaling bath, in room temperature
Under, using 40% dilute sulfuric acid cycle pickling for 24 hours.H is newly increased after pickling zone2O2With NaClO sinks,
Material after pickling is recycled respectively at normal pressure, 95 DEG C of reaction temperature using 35%H2O2,40%NaClO solution
12h is washed, achievees the purpose that deviate from mercaptan.Washed material enters bleaching tower, in 30kPa, 120 DEG C of tower top temperature, bottom of towe
It is distilled at 190 DEG C of temperature, impurity such as naphtalene oil in material etc. is further removed with this, tower top obtains bleached oil.Bleached oil
Polymerization 1.5h is carried out at catalyst BF3,80 DEG C and obtains godied oil.Godied oil enters flash system, in 28Kpa, tower top temperature
It 135 DEG C, is evaporated under reduced pressure at 200 DEG C of column bottom temperature, obtained oil obtains coumarone indene resin by cooling granulation.
The method of coumarone indene resin removal of mercaptans provided by the invention, this method are the coumarone production in existing coal chemical industry system
In technique, air, H are blown in increase2O2With NaClO washing process, the mercaptan in raw material is removed, the peculiar smell of resin has obtained very big drop
Low, mercaptans content is down to 20-25ppm from 60-90ppm before and after implementation；The technical operation is simple, significant effect.
Claims (5)
1. a kind of method of coumarone indene resin removal of mercaptans, in turn includes the following steps：Distillation, decoloration, polymerization, is flashed, is made pickling
Grain, which is characterized in that
Addition before the distilation steps blasts air step；
H is sequentially added after the acid pickling step2O2Washing, NaClO washing steps；
The method is：
(1) after blasting air in raw material heavy benzol slot, raw material enters distillation column distillation in raw material heavy benzol slot, and removing heavy constituent is miscellaneous
Matter, tower top obtain thick coumarone fraction；
(2) thick coumarone fraction enters descaling bath, successively through dilute sulfuric acid cycle pickling, H2O2Cycle washing, NaClO cycle washings
Acid-refined oil is obtained, acid-refined oil enters bleaching tower decoloration, and tower top obtains bleached oil；
(3) bleached oil is in catalyst BF3, polymerase 10 .5-2h is carried out at 50-150 DEG C of temperature and obtains godied oil；
(4) godied oil enters back into flash column and carries out vacuum distillation removing light component, and obtained oil obtains low different by cooling granulation
Taste coumarone indene resin；
It is 1-5m in the air velocity blasted in air step3/h；
In the H2O230-50%H is used in washing step2O2Solution recycles acid-refined oil and washs；
Acid-refined oil is recycled with 30-50%NaClO solution in the NaClO washing steps and is washed；
The H2O2It washs, the wash temperature of NaClO washing steps is 20-100 DEG C.
2. the method for coumarone indene resin removal of mercaptans according to claim 1, which is characterized in that in the distilation steps,
100-200 DEG C of the tower top temperature of destilling tower, 200-400 DEG C of column bottom temperature.
3. the method for coumarone indene resin removal of mercaptans according to claim 1, which is characterized in that in the acid pickling step,
With the dilute sulfuric acid cycle pickling 5-30h of 20-50%.
4. the method for coumarone indene resin removal of mercaptans according to claim 1, which is characterized in that in the decolorization process,
Pressure is 30-40kPa, and decolourize 80-200 DEG C of column overhead temperatures, 120-250 DEG C of column bottom temperature.
5. the method for coumarone indene resin removal of mercaptans according to claim 1, which is characterized in that in the flash steps,
Pressure is 10-50Kpa, 50-150 DEG C of tower top temperature, 150-250 DEG C of column bottom temperature.
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| CN108102029B (en) * | 2016-11-24 | 2020-07-28 | 宝武炭材料科技有限公司 | Production method of low-odor coumarone resin |
| CN107188997B (en) * | 2017-04-25 | 2022-02-22 | 广东新华粤树脂科技有限公司 | Method for removing C9 cold polymerized petroleum resin catalyst |
| CN114195613A (en) * | 2020-09-18 | 2022-03-18 | 宝武炭材料科技有限公司 | Indene extractive distillation purification method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279231A (en) * | 1999-06-30 | 2001-01-10 | 中国石油化工集团公司 | Process for refining coarse phenol containing sulfur |
| CN102718927A (en) * | 2011-03-29 | 2012-10-10 | 张苏侠 | Production method for coumarone resin |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279231A (en) * | 1999-06-30 | 2001-01-10 | 中国石油化工集团公司 | Process for refining coarse phenol containing sulfur |
| CN102718927A (en) * | 2011-03-29 | 2012-10-10 | 张苏侠 | Production method for coumarone resin |
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Address after: 2004-2002 Weisan Road Chemical Office Building, Baoshan District, Shanghai Patentee after: Baowu Carbon Material Technology Co., Ltd. Address before: 2004-2002 Weisan Road Chemical Office Building, Baoshan District, Shanghai Patentee before: Chemical Co., Ltd. of Baoshan Iron and Steel Group, Shanghai |
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Address after: 200942 three chemical engineering office building, Baoshan Iron and steel factory, Shanghai, Baoshan District Patentee after: Baowu Carbon Technology Co.,Ltd. Address before: 200942 three chemical engineering office building, Baoshan Iron and steel factory, Shanghai, Baoshan District Patentee before: BAOWU CARBON MATERIAL TECHNOLOGY Co.,Ltd. |
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