CN105754651B - A kind of solvent for ketone-benzol dewaxing process dilutes and cold wash method - Google Patents
A kind of solvent for ketone-benzol dewaxing process dilutes and cold wash method Download PDFInfo
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- CN105754651B CN105754651B CN201410781380.7A CN201410781380A CN105754651B CN 105754651 B CN105754651 B CN 105754651B CN 201410781380 A CN201410781380 A CN 201410781380A CN 105754651 B CN105754651 B CN 105754651B
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Abstract
The invention discloses a kind of for the solvent dilution of ketone-benzol dewaxing process and cold wash method, belong to benzol-kentone dewaxing technical field.The method includes：The solvent that the tower top of each recovery tower from dewaxed oil, sweat oil and scale wax, each secondary recovery tower, each three recovery towers and each four recovery towers is distillated is separately recovered, 70 80%, 65 75%, 55 65% and 40 55% the first solvent, the second solvent, the 3rd solvent and the 4th solvent are correspondingly respectively as wherein butanone mass fraction.Using the complex solvent that the mass fraction of at least two preparation butanone in first solvent, the second solvent, the 3rd solvent and the 4th solvent is 50 80%.In different dilution points and cold wash point, the above-mentioned solvent of various concentrations is separately added into.The present invention reduces the energy consumption of ketone-benzol dewaxing process by that pointedly to the solvent of different dilution point and cold wash the point suitable ratios of addition, can reduce solvent load, beneficial to the generation and growth of wax crystallization, improves the rate of filtration.
Description
Technical field
The present invention relates to benzol-kentone dewaxing technical field, more particularly to a kind of solvent for ketone-benzol dewaxing process dilutes and cold
Washing method.
Background technology
Benzol-kentone dewaxing referred to using subtracting two in petrochemical industry, the distillate that subtracts three be raw material production dewaxed oil, scale wax with
And byproduct sweat oil, generally comprise freezing, crystallization, filtering and recovery system.The principle of benzol-kentone dewaxing be subtract two, the cut that subtracts three
By cooling, the wax crystallization of condensation point high is separated out oil, and with the decline of temperature, the viscosity of feedstock oil and the concentration of wax crystal increase
Greatly.In order to reduce the viscosity of feedstock oil and the concentration of wax crystal, wax is set to form good crystalline solid, and reduce material conveying resistance
Power, the characteristic of wax is not dissolved using toluene and MEK or butanone dissolved oil, in raw material temperature-fall period, several times, for example
Add toluene and MEK or butanone solvent (hereinafter referred to as ketone-benzene solvent) to be diluted in different dilution points three times, treat
After the completion of wax crystallization in raw material, the solidliquid mixture of formation enters dewaxing filter carries out separation of solid and liquid, obtain dewaxing slack wax and
Dewaxed filtrate, wherein dewaxed filtrate send to oil recovery system heat temperature raising, and solvent is evaporated and is reclaimed, and obtain without solvent
Dewaxed oil.Because dewaxing slack wax oil-containing is higher, it is necessary to be added thereto to the slightly higher benzene -one solvent of temperature, obtained after intensification
Solidliquid mixture enters dewaxing filter carries out separation of solid and liquid, and de-oiling filtrate sends to sweat oil recovery system heat temperature raising, by solvent
It is evaporated and reclaims, while not solvent-laden sweat oil is obtained, and de-oiling slack wax sends to Wax recovering system heat temperature raising, will be molten
Agent is evaporated and reclaims, while obtaining not solvent-laden scale wax.It is above-mentioned to evaporate and reclaim the solvent for obtaining during each
Mix, after cooling, send crystal system back to as fresh solvent carries out above-mentioned application again.
Specifically, prior art is generally diluted in crystallization process using solvent at each dilution point, in filtering
During carry out cold wash at each cold wash point.And common solvents dilution is more at present using 3 points or 4 points dilution modes, pre-dilution is molten
Agent is added before sleeve pipe, and first time retarder thinner was added before wax precipitation, and second retarder thinner is in precipitated phase when number
The wax of amount is brilliant, and the increase of stock solution viscosity to a certain extent when add, third time retarder thinner after wax crystallization completion plus
Enter.Wherein, the temperature of retarder thinner is preferably shorter than 2-3 DEG C of the temperature of dilution point and cold wash point, reaches and both do not dissolve what is separated out
Wax crystallization, and chilling is not produced, cause to generate the purpose of more nucleus and small grains.
Inventor has found that prior art at least has problems with：
Prior art adds identical solvent, solvent used to be caused without specific aim in different dilution point and cold wash points
Solvent load is larger and energy consumption is higher in ketone-benzol dewaxing process.
The content of the invention
Embodiment of the present invention technical problem to be solved is, there is provided a kind of effectively to reduce ketone-benzol dewaxing process solvent
The solvent for ketone-benzol dewaxing process of consumption and energy consumption dilutes and cold wash method.Concrete technical scheme is as follows：
A kind of solvent for ketone-benzol dewaxing process is the embodiment of the invention provides to dilute and cold wash method, including：
Reclaim the first solvent：The tower top being separately recovered from each recovery tower of dewaxed oil, sweat oil and scale wax is distillated
Solvent, as the first solvent after mixing, in first solvent mass fraction of butanone be 70-80%；
Reclaim the second solvent：After raffinate of bottom of towe of each recovery tower is through heat exchange, into dewaxed oil, sweat oil
With each secondary recovery tower of scale wax, the solvent distillated from the tower top of each secondary recovery tower, conduct after mixing are separately recovered
Second solvent, the mass fraction of butanone is 65-75% in second solvent；
Reclaim the 3rd solvent：After the secondary raffinate of bottom of towe of each secondary recovery tower is through heat exchange, into dewaxed oil, sweat oil
With each three recovery towers of scale wax, the solvent distillated from the tower top of each three recovery towers, conduct after mixing are separately recovered
3rd solvent, the mass fraction of butanone is 55-65% in the 3rd solvent；
Reclaim the 4th solvent：After three raffinates of bottom of towe of each three recovery towers are through heat exchange, into dewaxed oil, sweat oil
With each four recovery towers of scale wax, the solvent distillated from the tower top of each four recovery towers, conduct after mixing are separately recovered
4th solvent, the mass fraction of butanone is 40-55% in the 4th solvent；
Prepare complex solvent：Using first solvent, second solvent, the 3rd solvent and the 4th solvent
In at least two preparation complex solvents, in the complex solvent mass fraction of butanone be 50-80%；
The mass fraction of butanone is added for the solvent of 73-80% in two sections of de-oiling cold wash points, the mass fraction of the butanone
For the solvent of 73-80% is selected from first solvent, second solvent or the complex solvent, the mass fraction of the butanone
For the solvent of 73-80% is added to dilution point of raw material after two sections of de-oiling cold wash point is utilized through cold wash；
The mass fraction of butanone is added for the solvent of 65-72% in one section of de-oiling cold wash point, the mass fraction of the butanone
It is described for the solvent of 65-72% is selected from first solvent, second solvent, the 3rd solvent or the complex solvent
The mass fraction of butanone is secondary dilute for the solvent of 65-72% is added to raw material after one section of de-oiling cold wash point is utilized through cold wash
Release a little；
The mass fraction of butanone is added for the solvent of 50-62% in dewaxing cold wash point, and the mass fraction of the butanone is 50-
62% solvent is selected from the 3rd solvent, the 4th solvent or the complex solvent, and the mass fraction of the butanone is 50-
62% solvent is added to three dilution points of raw material after the dewaxing cold wash point is utilized through cold wash.
Preferably, during the first solvent is reclaimed, the solvent distillated to the tower top of a recovery tower of sweat oil
It is dried dewater treatment.
Specifically, the mass fraction of butanone is 50-60% in the complex solvent.
Specifically, the mass fraction of butanone is 62-72% in the complex solvent.
Specifically, the mass fraction of butanone is 66-78% in the complex solvent.
Preferably, the complex solvent that the mass fraction of butanone is 78% is added in two sections of de-oiling cold wash point, it is described
Complex solvent is added to dilution point of the raw material after two sections of de-oiling cold wash point is utilized through cold wash.
Preferably, the second solvent that the mass fraction of butanone is 72% is added in one section of de-oiling cold wash point, it is described
Second solvent is added to the raw material secondary dilution point after one section of de-oiling cold wash point is utilized through cold wash.
Preferably, adding the 3rd solvent that the mass fraction of butanone is 60%, the described 3rd in the dewaxing cold wash point
Solvent is added to three dilution points of the raw material after the dewaxing cold wash point is utilized through cold wash.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
Solvent for ketone-benzol dewaxing process provided in an embodiment of the present invention dilutes and cold wash method, and reclaiming has specifically
The solvent of different ketone benzene ratios, and recovered solvent is carried out into reasonable preparation, further obtaining has bigger ketone benzene ratio model
The complex solvent for enclosing, then according to crystal system in ketone-benzol dewaxing process and filtration system solvent is constituted it is actual specific will
Ask, the one kind in the above-mentioned solvent of suitable desired proportion is targetedly added to different dilution point and cold wash points, not only
Solvent load can be reduced, the energy consumption of ketone-benzol dewaxing process is effectively reduced, and by improving the selectivity of solvent, more conducively wax knot
Brilliant generation and growth, improves the treatment effeciency of benzol-kentone dewaxing.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is that the solvent for ketone-benzol dewaxing process that the embodiment of the present invention 1 is provided dilutes and cold wash method flow diagram.
Specific embodiment
To make technical scheme and advantage clearer, embodiment of the present invention will be made below further detailed
Thin description.
A kind of solvent for ketone-benzol dewaxing process is the embodiment of the invention provides to dilute and cold wash method, including：
Reclaim the first solvent：The tower top being separately recovered from each recovery tower of dewaxed oil, sweat oil and scale wax is distillated
Solvent, as the first solvent after mixing, in first solvent mass fraction of butanone be 70-80%；
Reclaim the second solvent：After raffinate of bottom of towe of above-mentioned each recovery tower is through heat exchange, into dewaxed oil, sweat oil
With each secondary recovery tower of scale wax, the solvent distillated from the tower top of above-mentioned each secondary recovery tower, conduct after mixing are separately recovered
Second solvent, the mass fraction of butanone is 65-75% in second solvent；
Reclaim the 3rd solvent：After the secondary raffinate of bottom of towe of above-mentioned each secondary recovery tower is through heat exchange, into dewaxed oil, sweat oil
With each three recovery towers of scale wax, the solvent distillated from the tower top of above-mentioned each three recovery towers, conduct after mixing are separately recovered
3rd solvent, the mass fraction of butanone is 55-65% in the 3rd solvent；
Reclaim the 4th solvent：After three raffinates of bottom of towe of above-mentioned each three recovery towers are through heat exchange, into dewaxed oil, sweat oil
With each four recovery towers of scale wax, the solvent distillated from the tower top of above-mentioned each four recovery towers, conduct after mixing are separately recovered
4th solvent, the mass fraction of butanone is 40-55% in the 4th solvent；
Prepare complex solvent：Using above-mentioned first solvent, above-mentioned second solvent, above-mentioned 3rd solvent and above-mentioned 4th solvent
In at least two preparation complex solvents, in the complex solvent mass fraction of butanone be 50-80%；
Add the mass fraction of butanone for the solvent of 73-80% in two sections of de-oiling cold wash points, the mass fraction of the butanone is
The solvent of 73-80% is selected from the first solvent, the second solvent or complex solvent, and the mass fraction of the butanone is the solvent of 73-80%
Dilution point of raw material is added to after two sections of de-oiling cold wash points are utilized through cold wash；
Add the mass fraction of butanone for the solvent of 65-72% in one section of de-oiling cold wash point, the mass fraction of the butanone is
The solvent of 65-72% is selected from the first solvent, the second solvent, the 3rd solvent or complex solvent, and the mass fraction of the butanone is 65-
72% solvent is added to raw material secondary dilution point after one section of de-oiling cold wash point is utilized through cold wash；
The mass fraction of butanone is added for the solvent of 50-62% in dewaxing cold wash point, and the mass fraction of the butanone is 50-
62% solvent is selected from the 3rd solvent, the 4th solvent or complex solvent, and the mass fraction of the butanone is the solvent of 50-62% de-
Wax cold wash point is added to three dilution points of raw material after being utilized through cold wash.
It is understood that " ketone-benzol dewaxing process ", " dewaxed oil, sweat oil and de-oiling described in the embodiment of the present invention
Each recovery tower of wax ", " each secondary recovery tower of dewaxed oil, sweat oil and scale wax ", " dewaxed oil, sweat oil and de-oiling
Each three recovery towers of wax ", " each four recovery towers of dewaxed oil, sweat oil and scale wax ", " two sections of de-oiling cold wash points ", " one
Section de-oiling cold wash point ", " dewaxing cold wash point ", " dilution point of raw material ", " raw material secondary dilution point ", " three dilution points of raw material "
It is state of the art, those skilled in the art can know above-mentioned each recovery tower, cold wash point and dilute according to prior art
Aforesaid operations are released a little and carried out, and can simultaneously obtain product dewaxed oil, sweat oil and scale wax, the embodiment of the present invention is not right herein
It makees specific restriction.
Solvent for ketone-benzol dewaxing process provided in an embodiment of the present invention dilutes and cold wash method, and reclaiming has different ketone
The solvent of benzene ratio, and recovered solvent is carried out into reasonable preparation, further obtain the compounding with bigger ketone benzene proportion
Solvent, the actual particular requirement for then being constituted to solvent according to crystal system in ketone-benzol dewaxing process and filtration system, there is pin
The one kind in the above-mentioned solvent of suitable desired proportion is added to different dilution point and cold wash points to property, can not only be reduced molten
Agent consumption, effectively reduces the energy consumption of ketone-benzol dewaxing process, and by improving the selectivity of solvent, the more conducively generation of wax crystallization
And growth, improve the treatment effeciency of benzol-kentone dewaxing.
Preferably, contain about 1% water due to recycling design of sweat oil, directly using dilution and cold wash effect
Difference, and water capacity icing easily on filter, reduce the rate of filtration of filter, therefore during the first solvent is reclaimed, under wax
The solvent that the tower top of recovery tower of oil is distillated is dried dewater treatment.That is, in the sweat oil that will be reclaimed once
Before the solvent that the solvent that the tower top of recovery tower is distillated is distillated with the tower top of dewaxed oil and each recovery tower of scale wax mixes,
Dewater treatment is dried to it.
In the embodiment of the present invention, using above-mentioned first solvent, above-mentioned second solvent, above-mentioned 3rd solvent and above-mentioned 4th molten
At least two preparation complex solvents in agent, the mass fraction for preparing butanone is the complex solvent of 50-80%.
It is understood that the complex solvent can be by the first solvent, the second solvent, the 3rd solvent and the 4th solvent
Any two kinds, any three kinds or any four composition.
For example, in the complex solvent butanone mass fraction can be 50-60%, 62-72% or 66-78%,
Can also be 51%, 57%, 61%, 67%, 71%, 75%, 79% etc..
Preferably, the loss in order to reduce wax while fluid is remained in removing wax, adds in two sections of de-oiling cold wash points
The mass fraction for entering butanone is 78% complex solvent being made up of the first solvent and the second solvent.In order to reduce the receipts of sweat oil
Rate, the second solvent that the mass fraction of butanone is 72% is added in one section of de-oiling cold wash point and dilution point.In order to fully dissolve
Oil in wax, the 3rd solvent that the mass fraction of butanone is 60% is added in dewaxing cold wash point.
At present, the solvent dilution process employed in ketone-benzol dewaxing process is generally 3 points of dilutions or 4 points of dilutions, and citing comes
Say, 3 points of common dilution flows are as follows：Solvent dilution：Two sections of cold wash vacuum filtrates of de-oiling (including part high vacuum filtrate
And recycling design) come from two sections of filtrate tanks of de-oiling, by solvent pumped after, by dewax a retarder thinner line, respectively through
The solvent flow control valve of each road one time, is applied directly to each road heat exchange sleeve raw material tube side middle and lower part, once dilutes new as dewaxing
Fresh solvent.Secondary solvent dilutes：One section of cold wash vacuum filtrate of de-oiling (including part high vacuum filtrate and recycling design) carrys out autospasy
Oily one section of filtrate tank, after being extracted out by one section of recycle liquid pump, through a solvent heat exchanger and secondary solvent heat exchanger and dewaxed filtrate
After Continuous Heat Transfer, then respectively through each road secondary solvent flow control valve, it is added in each road heat exchange sleeve material outlet line, makees
It is dewaxing secondary dilution fresh solvent.Three solvent dilutions：Dewaxing cold wash vacuum filtrate (including part high vacuum filtrate and recovery
Solvent) dewaxed filtrate tank is come from, after circulating pumped by dewaxed filtrate, three solvent flow control valves are first passed through, then by ammonia
The cold effective ammonia of set cools, and then goes the cold cannula exit bus of secondary amine, used as three dilution fresh solvents of dewaxing.Dewaxing is cold
Wash solvent, de-oiling cold wash solvent and be recovery system recovered solvent, used after cooling.
In order in solvent dilution, the selectivity of solvent for use targetedly be improved in different dilution points, enter
And the yield of wax crystallization is improved, the yield of sweat oil is reduced, and the generation of energy consumption is reduced, preferably, the embodiment of the present invention exists
It is molten through the compounding that the mass fraction of the butanone after cold wash utilization is 78% that dilution point of raw material is added in two sections of de-oiling cold wash points
Agent.Further, being added in one section of de-oiling cold wash point mass fraction of butanone after cold wash utilization in raw material secondary dilution point is
72% the second solvent.Further, it is added in the butanone after dewaxing cold wash point is utilized through cold wash in three dilution points of raw material
Mass fraction be 60% the 3rd solvent.
Wherein, above-mentioned " by cold wash after " refers to solvent for use had been carried out before being diluted
Cold wash utilization, also will further be used as retarder thinner by the solvent after cold wash utilization, improving its utilization rate, reduce
Energy consumption.
It can be seen that, the method for providing according to embodiments of the present invention is diluted in above three raw material dilution point using solvent
During, from dilution point of raw material to three dilution points of raw material, the toluene level in retarder thinner used gradually rises, more
Beneficial to the generation and growth of wax crystallization, solubility of the wax in solvent and oil is reduced, and be more conducive to reduce the condensation point of dewaxed oil.
Hereinafter the present invention will be further described through by specific embodiment.
The unreceipted condition person in specific examples below, is carried out according to normal condition.Raw materials used and device is not noted
Bright production firm and specification person be can by city available from conventional products.
Embodiment 1
The present embodiment processes certain second line of distillation oil using conventional ketone-benzol dewaxing device, in the benzol-kentone dewaxing of second line of distillation oil
Cheng Zhong, make use of solvent provided in an embodiment of the present invention to dilute and cold wash method.Accompanying drawing 1 for the present embodiment provide for ketone benzene
The solvent dilution of dewaxing process and cold wash method flow diagram, wherein, the raw material dilution point of three-level crystallisation by cooling part is from left to right
Respectively dilution point of raw material, raw material secondary dilution point, three dilution points of raw material；Dewaxed oil, sweat oil and scale wax it is each
Referred in recovery tower while including the one of a recovery tower of dewaxed oil, a recovery tower of sweat oil and scale wax
Secondary recovery tower；Correspondingly, each secondary recovery tower of dewaxed oil, sweat oil and scale wax, dewaxed oil, sweat oil and scale wax is each
Each four recovery towers of three recovery towers, dewaxed oil, sweat oil and scale waxs are respectively provided with and above-mentioned dewaxed oil, sweat oil and de-oiling
The similar implication of each recovery tower of wax.
As shown in Figure 1, the method that the present embodiment is provided is comprised the following steps that：
The solvent distillated from the tower top of each recovery tower of dewaxed oil, sweat oil and scale wax is separately recovered, after mixing
Used as the first solvent, the mass fraction of butanone is 80% in first solvent.Wherein, it is mixed into the first solvent in above-mentioned each solvent
Before, to the recovered overhead from sweat oil recovery tower to solvent be dried dewater treatment.
After raffinate of bottom of towe of an above-mentioned recovery tower is through heat exchange, into each the two of dewaxed oil, sweat oil and scale wax
Secondary recovery tower, is separately recovered the solvent distillated from the tower top of above-mentioned secondary recovery tower, and as the second solvent after mixing, this is second molten
The mass fraction of butanone is 72% in agent.
After the secondary raffinate of bottom of towe of above-mentioned secondary recovery tower is through heat exchange, into each the three of dewaxed oil, sweat oil and scale wax
Secondary recovery tower, is separately recovered the solvent distillated from the tower top of above-mentioned each three recovery towers, as the 3rd solvent, the 3rd after mixing
The mass fraction of butanone is 60% in solvent.
After three raffinates of bottom of towe of each three recovery towers of above-mentioned dewaxed oil, sweat oil and scale wax are through heat exchange, into de-
Each four recovery towers of wax oil, sweat oil and scale wax, are separately recovered the solvent distillated from the tower top of above-mentioned four recovery towers, mix
As the 4th solvent after conjunction, the mass fraction of butanone is 42% in the 4th solvent.
It is 78% by the first solvent and the 4th solvent complex by the mass fraction of butanone in two sections of de-oiling filtration fractions
Into complex solvent add two sections of de-oiling cold wash points carry out cold wash utilization.Then the scale wax for being obtained in two sections of de-oiling filtration fractions
A recovery tower sequentially into scale wax is carried out the recovery of scale wax to four recovery towers of scale wax by liquid, and through cold wash profit
The mass fraction of above-mentioned butanone is that 78% complex solvent by the first solvent and the 4th solvent complex will go into
Dilution point of raw material in the raw material dilution point of three-level crystallisation by cooling part is once diluted to feedstock oil.
In one section of de-oiling filtration fraction, the second solvent that the mass fraction of butanone is 72% is added into one section of de-oiling cold wash point
Carry out cold wash utilization.Then, the first de-oiling wax liquor for being obtained by one section of de-oiling filtration fraction will be entered into two sections of de-oiling filtration fractions
Capable deoiling treatment again；The sweat oil liquid obtained by one section of de-oiling filtration fraction will sequentially into a recovery tower of sweat oil to wax
Four recovery towers of lower oil carry out the recovery of sweat oil；And the mass fraction of the above-mentioned butanone after being utilized through cold wash be 72% the
The raw material secondary dilution point that two solvents will go into the raw material dilution point of three-level crystallisation by cooling part carries out secondary to feedstock oil
Dilution.
In dewaxing filtration fraction, the 3rd solvent addition dewaxing cold wash point that the mass fraction of butanone is 60% is carried out into cold wash
Utilize.Then, the non-de-oiling wax liquor for being obtained by dewaxing filtration fraction will carry out one section of de-oiling into one section of de-oiling filtration fraction
Reason；The dewaxing fluid obtained by dewaxing filtration fraction will sequentially enter a recovery tower of dewaxed oil to four recovery of dewaxed oil
Tower carries out the recovery of dewaxed oil；And the 3rd solvent that the mass fraction of the above-mentioned butanone after being utilized through cold wash is 60% will go into
Three dilution points of raw material in the raw material dilution point of three-level crystallisation by cooling part carry out three dilutions to feedstock oil.
Three-level crystallisation by cooling part by above-mentioned three times dilute after dilution feedstock oil will sequentially through dewax filtration fraction,
Each recovery tower of one section of de-oiling filtration fraction, two sections of de-oiling filtration fractions and dewaxed oil, sweat oil and scale wax is to de-
Each four recovery towers of wax oil, sweat oil and scale wax carry out the recovery of dewaxed oil, sweat oil and scale wax respectively.The present embodiment
, targetedly using different retarder thinners and cold wash solvent are constituted, given full play to by different dilution point and cold wash points
The specific aim effect of solvent, beneficial to the growth of wax crystallization, wax yield improves 2%, and can reduce solvent usage amount 5%, accordingly subtracts
The energy consumption about 4% that few removal process is consumed.Further, since being carried out to the solvent that the tower top of recovery tower of sweat oil is distillated
Drying and dehydrating treatment, it is therefore prevented that water freezes on filter, improves the filter rate of filtration.
Embodiment 2
The present embodiment is essentially identical with the operating procedure of embodiment 1, and difference is, the present embodiment two sections of de-oiling cold wash points with
And the mass fraction of butanone is 76% in the solvent that is added of follow-up dilution point of raw material；One section of de-oiling cold wash point and after
The mass fraction of butanone is 69% in the solvent that continuous raw material secondary dilution point is added；In dewaxing cold wash point and follow-up raw material three
The mass fraction of butanone is 57% in the solvent that secondary dilution point is added.
By the present embodiment, retarder thinner that each dilution point and cold wash are pointed out, cold wash solvent are different in composition, fill
The specific aim effect of solvent is waved in distribution, and beneficial to the growth of wax crystallization, wax yield improves 2%, and reduces solvent usage amount 6%, phase
The energy consumption about 5% that removal process is consumed should be reduced.
Presently preferred embodiments of the present invention is the foregoing is only, the protection domain being not intended to limit the invention is all in this hair
Within bright spirit and principle, any modification, equivalent substitution and improvements made etc. should be included in protection scope of the present invention
Within.
Claims (6)
1. a kind of for the solvent dilution of ketone-benzol dewaxing process and cold wash method, including：
Reclaim the first solvent：It is molten that the tower top being separately recovered from each recovery tower of dewaxed oil, sweat oil and scale wax is distillated
Agent, as the first solvent after mixing, the mass fraction of butanone is 70-80% in first solvent；
Reclaim the second solvent：After raffinate of bottom of towe of each recovery tower is through heat exchange, into dewaxed oil, sweat oil and de-
Each secondary recovery tower of oily wax, is separately recovered the solvent distillated from the tower top of each secondary recovery tower, as second after mixing
Solvent, the mass fraction of butanone is 65-75% in second solvent；
Reclaim the 3rd solvent：After the secondary raffinate of bottom of towe of each secondary recovery tower is through heat exchange, into dewaxed oil, sweat oil and de-
Each three recovery towers of oily wax, are separately recovered the solvent distillated from the tower top of each three recovery towers, as the 3rd after mixing
Solvent, the mass fraction of butanone is 55-65% in the 3rd solvent；
Reclaim the 4th solvent：After three raffinates of bottom of towe of each three recovery towers are through heat exchange, into dewaxed oil, sweat oil and de-
Each four recovery towers of oily wax, are separately recovered the solvent distillated from the tower top of each four recovery towers, as the 4th after mixing
Solvent, the mass fraction of butanone is 40-55% in the 4th solvent；
Prepare complex solvent：Using in first solvent, second solvent, the 3rd solvent and the 4th solvent
At least two prepare complex solvent, and the mass fraction of butanone is 50-80% in the complex solvent；
The mass fraction of butanone is added for the solvent of 73-80% in two sections of de-oiling cold wash points, and the mass fraction of the butanone is 73-
80% solvent is selected from first solvent, second solvent or the complex solvent, and the mass fraction of the butanone is 73-
80% solvent is added to dilution point of raw material after two sections of de-oiling cold wash point is utilized through cold wash；
The mass fraction of butanone is added for the solvent of 65-72% in one section of de-oiling cold wash point, and the mass fraction of the butanone is 65-
72% solvent is selected from first solvent, second solvent, the 3rd solvent or the complex solvent, the butanone
Mass fraction is added to raw material secondary dilution point for the solvent of 65-72% after one section of de-oiling cold wash point is utilized through cold wash；
The mass fraction of butanone is added for the solvent of 50-62% in dewaxing cold wash point, and the mass fraction of the butanone is 50-62%
Solvent be selected from the 3rd solvent, the 4th solvent or the complex solvent, the mass fraction of the butanone is 50-62%
Solvent it is described dewaxing cold wash point through cold wash utilize after be added to three dilution points of raw material.
2. method according to claim 1, it is characterised in that during first solvent is reclaimed, to sweat oil
The solvent that distillates of tower top of a recovery tower be dried dewater treatment.
3. method according to claim 1, it is characterised in that the mass fraction of butanone is 50- in the complex solvent
60%.
4. method according to claim 2, it is characterised in that add the quality minute of butanone in two sections of de-oiling cold wash point
Number is 78% complex solvent, and the complex solvent is added to described after two sections of de-oiling cold wash point is utilized through cold wash
Dilution point of raw material.
5. method according to claim 4, it is characterised in that add the quality minute of butanone in one section of de-oiling cold wash point
Number is 72% second solvent, and second solvent is added to described after one section of de-oiling cold wash point is utilized through cold wash
Raw material secondary dilution point.
6. method according to claim 5, it is characterised in that add the mass fraction of butanone to be in the dewaxing cold wash point
60% the 3rd solvent, the 3rd solvent is added to the raw material three times after the dewaxing cold wash point is utilized through cold wash
Dilution point.
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| CN109621471B (en) * | 2019-01-31 | 2021-05-11 | 茂名海和石油化工有限公司 | Energy-saving recovery system of solvent dewaxing and deoiling device |
| CN115651700A (en) * | 2022-09-23 | 2023-01-31 | 盘锦北方沥青燃料有限公司 | Lubricating oil solvent dewaxing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549513A (en) * | 1968-07-25 | 1970-12-22 | Texaco Inc | Solvent dewaxing process with cooling by direct contact with evaporating refrigerant |
| US5213696A (en) * | 1991-12-23 | 1993-05-25 | Star Enterprise | Automatic dewaxing filter washing system and method |
| JPH0762358A (en) * | 1993-08-27 | 1995-03-07 | Nippon Sekiyu Seisei Kk | Changing composition of solvents in dewaxing unit |
| CN102453548A (en) * | 2010-10-14 | 2012-05-16 | 中国石油化工股份有限公司 | Solvent dewaxing method by use of dewaxing assistant |
| CN102942961A (en) * | 2012-10-24 | 2013-02-27 | 中国石油化工股份有限公司 | Ketone-benzene dewaxing apparatus capable of reducing deoiling fresh solvent |
| CN103540360A (en) * | 2013-10-23 | 2014-01-29 | 中国石油化工股份有限公司 | Solvent recovery method and protection method capable of reducing corrosion of ketone-benzol dewaxing device water solution system |
-
2014
- 2014-12-16 CN CN201410781380.7A patent/CN105754651B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3549513A (en) * | 1968-07-25 | 1970-12-22 | Texaco Inc | Solvent dewaxing process with cooling by direct contact with evaporating refrigerant |
| US5213696A (en) * | 1991-12-23 | 1993-05-25 | Star Enterprise | Automatic dewaxing filter washing system and method |
| JPH0762358A (en) * | 1993-08-27 | 1995-03-07 | Nippon Sekiyu Seisei Kk | Changing composition of solvents in dewaxing unit |
| CN102453548A (en) * | 2010-10-14 | 2012-05-16 | 中国石油化工股份有限公司 | Solvent dewaxing method by use of dewaxing assistant |
| CN102942961A (en) * | 2012-10-24 | 2013-02-27 | 中国石油化工股份有限公司 | Ketone-benzene dewaxing apparatus capable of reducing deoiling fresh solvent |
| CN103540360A (en) * | 2013-10-23 | 2014-01-29 | 中国石油化工股份有限公司 | Solvent recovery method and protection method capable of reducing corrosion of ketone-benzol dewaxing device water solution system |
Non-Patent Citations (1)
| Title |
|---|
| 酮苯脱蜡中试装置和试验;何灏等;《厦门大学学报(自然科学版)》;20050530;第44卷(第03期);第390-394页 * |
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