CN101973834A - Technology for preparing butylene through purification by adopting molecular sieve adsorption method under liquid phase state - Google Patents
Technology for preparing butylene through purification by adopting molecular sieve adsorption method under liquid phase state Download PDFInfo
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- CN101973834A CN101973834A CN2010105086636A CN201010508663A CN101973834A CN 101973834 A CN101973834 A CN 101973834A CN 2010105086636 A CN2010105086636 A CN 2010105086636A CN 201010508663 A CN201010508663 A CN 201010508663A CN 101973834 A CN101973834 A CN 101973834A
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Abstract
The invention discloses technology for preparing butylene through purification by adopting a molecular sieve adsorption method under liquid phase state, which is mainly characterized in that an integrally manufactured molecular sieve adsorption tower is connected with the upper and lower parts of a liquid circulating pump by a connecting line; and the middle part of the molecular sieve adsorption tower is connected with a rotary pump, an upper extract liquor distillation tower and a lower extract liquor distillation tower as a whole by the connecting line in sequence. The technology is reasonable in process and simple in preparation, ensures the produced butylene to have high purity and solves the problem of environmental pollution, thus being ideal.
Description
Affiliated technical field
The present invention relates to a kind of synthetic technology of preparing of Chemicals, particularly a kind of technology that adopts molecular sieve adsorption method purification preparation butylene under the liquid phase state that adopts is suitable for the synthetic preparation of chemical industry butylene.
Background technology
At present, the complex production process of butylene, temperature of reaction instability during reaction, purity is low.
Summary of the invention
Problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of technology that adopts molecular sieve adsorption method purification preparation preparation butylene under the liquid phase state that adopts is provided.This technology not only technology is reasonable, and preparation is simple, and the butylene purity height of producing, and has solved problem of environmental pollution.
The technical solution used in the present invention is: the adsorbing tower with molecular sieve that is made into one by connection line be connected up and down with liquid circulating pump, its middle part by connection line and rotary valve, go up extraction liquid distillation tower, time extraction liquid distillation tower one that is linked in sequence and constitute.When using the technology of the present invention, according to working specification, carbon compound is passed through connection line, join in the adsorbing tower with molecular sieve of the technology of the present invention through rotary valve, after impurity is removed in adsorbing tower with molecular sieve absorption, after rotary valve rotates to the path of extraction liquid distillation tower and following extraction liquid distillation tower, makes extraction liquid distillation tower and following extraction liquid distillation tower remove the thick product redistillation processing of impurity to absorption, high-purity butylene, export trade or standby are produced in preparation.
The invention has the beneficial effects as follows that technology is reasonable, preparation is simple, the butylene purity height of production, and solved problem of environmental pollution.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Accompanying drawing number is: 1, adsorbing tower with molecular sieve, 2, rotary valve, 3, go up the extraction liquid distillation tower, 4, raffinate distillation tower down, 5, connection line, 6, liquid circulating pump.
Embodiment
With reference to Fig. 1, the adsorbing tower with molecular sieve 1 that is made into one by connection line 5 be connected up and down with liquid circulating pump 6, its middle part by connection line 5 and rotary valve 2, go up extraction liquid distillation tower 3, extraction liquid distillation tower 4 one that is linked in sequence constitutes down.When using the technology of the present invention, according to working specification, carbon 4 compounds are passed through connection line 5, join in the adsorbing tower with molecular sieve 1 of the technology of the present invention through rotary valve 2, after impurity is removed in adsorbing tower with molecular sieve 1 absorption, after rotary valve 2 rotates to the path of extraction liquid distillation tower 3 and following extraction liquid distillation tower 4, makes extraction liquid distillation tower 3 and 4 pairs of absorption of following extraction liquid distillation tower remove the thick product redistillation processing of impurity, high-purity butylene, export trade or standby are produced in preparation.
Adopt liquid phase state to adopt the technology of molecular sieve adsorption method purification butylene down, producing polymerization-grade 1-butylene product because of employing by the C4 compound is main purpose, does not generate the situation of high-purity isobutylene or methyl tertiary butyl ether.
The one, the molecular sieve of employing highly selective carries out liquid phase to the 1-butylene in the C4 compound and selects absorption; The 2nd, utilize the technology of static simulation moving-bed.It is generally acknowledged, be 1-butylene selected adsorbent preferably with the X type of barium or potassium modification or y-type zeolite molecular sieve.
The ultimate principle of this law is after 1-butylene is by preferentially adsorbed, and the desorbing agent of forming with hexane or hexanaphthene mixture cements out it.Produce two kinds of liquid streams this moment, a kind of is the mixture of 1-butylene and desorbing agent, and another kind is the mixture of desorbing agent and all the other feed composition.By distillation desorbing agent and material are separated then, desorbing agent recycles.
In order to strengthen adsorption efficiency, should take the operative technique of sorbent material and the convection current of butylene material, this just needs to use moving bed process.But difficulty is more in moving-bed operation, and for example the even flow problem of the wearing and tearing of sorbent material, material etc. is all complicated.This law has adopted the isolation technique of static simulation moving-bed for this reason, is about to adsorption bed and maintains static, and change the import and export position that material liquid flows periodically, makes its generation be equivalent to the effect that moves with the paired flow path direction of sorbent material.If more liquid flow inlet and outlet is set, and press fixed order and program unlatching conversion, so just form the technological process that is equivalent to continuous moving-bed substantially.If said procedure control better, then technological operation is stable and be easy to grasp.On the selected basis of sorbent material and desorbing agent, the factor of decision adsorption effect is exactly a proportionlity mutual between duration of contact and material and desorbing agent.
Liquid circulating pump 6 is sent into cat head with liquid after extract out adsorbing tower with molecular sieve 1 bottom.The effect of rotary valve 2 is equivalent to the effect of a porous rotary valve.There are four bursts of liquid stream continuously feedings and discharging in the right side of valve; The left side of valve many pipelines of ining succession, their the other end is distributed in the adsorption tower.In arbitrary preset time, the pipeline from the rotary valve to the bed has only four moving.
Temperature, pressure condition in the whole adsorption process relatively relax.Temperature is 25-150 ℃, and pressure is no more than 3446kPa, mainly makes it can remain on operation under the liquid phase state, and product butylene purity is greater than 99%, and extraction efficiency can reach 92%.
This technology not only technology is reasonable, and preparation is simple, and the butylene purity height of producing, and has solved problem of environmental pollution.
Claims (1)
1. one kind is adopted under the liquid phase state and to adopt the purify technology of preparation butylene of molecular sieve adsorption method, it is characterized in that: the adsorbing tower with molecular sieve that is made into one by connection line be connected up and down with liquid circulating pump, its middle part is by connection line and rotary valve, upward extraction liquid distillation tower, the following extraction liquid distillation tower one that is linked in sequence constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105086636A CN101973834A (en) | 2010-10-18 | 2010-10-18 | Technology for preparing butylene through purification by adopting molecular sieve adsorption method under liquid phase state |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105086636A CN101973834A (en) | 2010-10-18 | 2010-10-18 | Technology for preparing butylene through purification by adopting molecular sieve adsorption method under liquid phase state |
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| CN101973834A true CN101973834A (en) | 2011-02-16 |
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| CN2010105086636A Pending CN101973834A (en) | 2010-10-18 | 2010-10-18 | Technology for preparing butylene through purification by adopting molecular sieve adsorption method under liquid phase state |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101657396A (en) * | 2007-04-25 | 2010-02-24 | 韩国能源研究院 | From the C4 olefins/paraffins mixed gas, prepare high purity butene-1 |
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2010
- 2010-10-18 CN CN2010105086636A patent/CN101973834A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101657396A (en) * | 2007-04-25 | 2010-02-24 | 韩国能源研究院 | From the C4 olefins/paraffins mixed gas, prepare high purity butene-1 |
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Application publication date: 20110216 |