CN106349009A - Distillation-condensation method of dichloromethane in acesulfame-k compound - Google Patents

Distillation-condensation method of dichloromethane in acesulfame-k compound Download PDF

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Publication number
CN106349009A
CN106349009A CN201610750521.8A CN201610750521A CN106349009A CN 106349009 A CN106349009 A CN 106349009A CN 201610750521 A CN201610750521 A CN 201610750521A CN 106349009 A CN106349009 A CN 106349009A
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CN
China
Prior art keywords
dichloromethane
condenser
acesulfame
distillation
steam heater
Prior art date
Application number
CN201610750521.8A
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Chinese (zh)
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CN106349009B (en
Inventor
夏家信
祁飞
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安徽金禾实业股份有限公司
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Priority to CN201610750521.8A priority Critical patent/CN106349009B/en
Publication of CN106349009A publication Critical patent/CN106349009A/en
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00Preparation of halogenated hydrocarbons
    • C07C17/38Separation; Purification; Stabilisation; Use of additives
    • C07C17/383Separation; Purification; Stabilisation; Use of additives by distillation
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D291/00Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms
    • C07D291/02Heterocyclic compounds containing rings having nitrogen, oxygen and sulfur atoms as the only ring hetero atoms not condensed with other rings
    • C07D291/06Six-membered rings
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10General improvement of production processes causing greenhouse gases [GHG] emissions
    • Y02P20/12Energy input
    • Y02P20/121Energy efficiency measures, e.g. energy management
    • Y02P20/122Energy efficiency measures, e.g. energy management characterised by the type of apparatus
    • Y02P20/124Boilers, furnaces, lighting or vacuum systems

Abstract

The invention discloses a distillation-condensation method of dichloromethane in an acesulfame-k compound, which comprises the original rectifying tower and the steam heater thereof. The top of the rectifying tower is connected with a condenser and a product channel successively. The distillation-condensation method of dichloromethane in an acesulfame-k compound is characterized by comprising the steps of: a. The crude dichloromethane is pumped into the rectifying tower, and the steam heater of the rectifying tower is opened to control the rectifying tower temperature above 50oC; b. The condenser is set as an evaporative condenser, and the condensate of the steam heater is pumped into the evaporative condenser; b. The fan of the condenser is opened, the condensate is sprayed on the gas phase pipe, the fan exhausts to reduce the condensate temperature, and vaporize to take the gas heat, so that the gas condensation is completed. Beneficial effects of the distillation-condensation method of dichloromethane in an acesulfame-k compound: the distillation-condensation method of dichloromethane in an acesulfame-k compound eliminates the influence of the heat exchanger on the production and reduces the heat exchange, reduces the freezing load, and saves a lot of power by utilizing the good cooling effect of the evaporative condenser and the little corrosiveness of the evaporative cold material and the evaporation of the condensate to achieve the purpose of cooling.

Description

Dichloromethane rectification condensation method in a kind of acesulfame potassium synthesis

Technical field

The present invention relates to acesulfame potassium synthesis technique field, in particularly a kind of acesulfame potassium synthesis technique, dichloromethane rectification is cold Solidifying method.

Background technology

Dichloromethane, as the primary solvent in acesulfame potassium production process, needs in solvent recovery process through rectification and purification, It is that traditional condensation process is lowered the temperature (as shown in Figure 1) for brine condenser, due to containing substantial amounts of chloride ion in saline, 40 at present DEG C when especially severe is corroded to condenser, heat exchange mainly leans on heat transfer it is desirable to the temperature of saline is 10 within the condenser simultaneously Below DEG C, the saline heat waste of pipeline is larger, brings very big load to ice maker, consumes substantial amounts of electric energy.Imitated by heat exchanger Rate impact is big, and the heat that dichloromethane steam discharges in liquefaction process needs to lower the temperature using a large amount of saline, equipment is damaged simultaneously The high shortcoming of bad rate.

Content of the invention

The purpose of the present invention is exactly big, rotten to condenser in order to overcome the prior art type of cooling to there is the cold damage of control process Lose serious shortcoming, dichloromethane rectification condensation method in a kind of acesulfame potassium synthesis providing, eliminate heat exchanger to production Restriction, reduces the use of saline, reduces cooling load, saves a large amount of electric energy.

The purpose of the present invention is achieved by the following technical programs:

Dichloromethane rectification condensation method in a kind of acesulfame potassium synthesis, including original rectifying column and its steam heater, rectification Top of tower is sequentially connected condenser and pan tank it is characterised in that comprising the following steps:

A, crude product dichloromethane pump into rectifying column, open rectifying column steam heater, control rectifying column tower temperature more than 50 DEG C;

B, described condenser is set to evaporative condenser, the condensed fluid of steam heater is pumped into evaporative condenser;

B, unlatching condenser fan, condensed fluid sprays on gas phase pipeline, and condensate temperature is reduced by blower fan convulsion, and vaporization zone Walk gas phase heat, make vapor condensation.

In technical solution of the present invention, dichloromethane in the condensation process after rectification, using steam heaterCondensed fluid's Evaporation absorbs latent heat, takes away the heat in dichloromethane steam in evaporative condenser, makes dichloromethane steam be condensed into liquid, Reclaim qualified dichloromethane finished product.

Beneficial effects of the present invention: by using the good refrigeration of evaporative condenser, and dichloromethane steam Little to the corrosivity evaporating cold material, the purpose to reach cooling is evaporated by condensed fluid.Compared with existing cooling means, this The bright heat exchanger that eliminates, to the restriction producing, reduces the use of heat exchanger, reduces freezing load, save a large amount of electric energy.Minimizing sets Standby mounting cost of purchasing maintains expense, decreases the calcium chloride of annual consumption and the use of soft water, eliminates in maintenance process In impact to environment.

Brief description

Fig. 1 is existing acesulfame potassium rectification condensation process flow chart;

Fig. 2 is the acesulfame potassium rectification condensation process flow chart of the present invention.

Specific embodiment

As shown in Fig. 2 the present invention provides dichloromethane rectification condensation method in a kind of acesulfame potassium synthesis, including original essence Evaporate tower and its steam heater, rectifying column top is sequentially connected evaporative condenser and pan tank, the condensed fluid of steam heater Evaporative condenser entrance is connected to by pipeline.Using evaporative condenser mode generation, for traditional saline being used as coolant Enter heat exchanger history dichloromethane steam liquefied.

Concrete operation step:

1) by crude product dichloromethane with 15m3The flow of/h pumps into rectifying column, opens rectifying column heater;

2) by the condensed fluid of rectifying column heater with 2m3The flow of/h pumps into evaporative condenser;

3) open evaporative condenser blower fan, condensed fluid sprays on gas phase pipeline, and condensate temperature is reduced by blower fan convulsion, and Vaporization zone walks gas phase heat, makes vapor condensation;

4) pass through to adjust into tower flow and steam flow rate, control tower temperature more than 50 DEG C.

This invention removes heat exchanger is to the restriction producing, former heat exchanger maximum heat exchange area is 200 square meters, in new technology Heat exchanger minimum heat exchange area 380 square meter using, organic efficiency improves 80%, reduces the use of ice maker simultaneously, saves electricity in a large number Can be it is contemplated that annual 3900000 degree of saves energy, equipment maintenance expense 200,000.

Above-described embodiment, as the better embodiment of the present invention, is described in detail the technology design of the present invention and implements to want Point, is not that protection scope of the present invention is limited, all according to spirit of the invention made any simple modification and Equivalent structure transformation or modification, all should be included within the scope of the present invention.

Claims (1)

1. dichloromethane rectification condensation method in a kind of acesulfame potassium synthesis, including original rectifying column and its steam heater, essence Evaporate top of tower and be sequentially connected condenser and pan tank it is characterised in that comprising the following steps:
A, crude product dichloromethane pump into rectifying column, open rectifying column steam heater, control rectifying column tower temperature more than 50 DEG C;
B, described condenser is set to evaporative condenser, the condensed fluid of steam heater is pumped into evaporative condenser;
B, unlatching condenser fan, condensed fluid sprays on gas phase pipeline, and condensate temperature is reduced by blower fan convulsion, and vaporization zone Walk gas phase heat, make vapor condensation.
CN201610750521.8A 2016-08-30 2016-08-30 Dichloromethane rectifying condensation method in a kind of synthesis of acesulfame potassium CN106349009B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610750521.8A CN106349009B (en) 2016-08-30 2016-08-30 Dichloromethane rectifying condensation method in a kind of synthesis of acesulfame potassium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610750521.8A CN106349009B (en) 2016-08-30 2016-08-30 Dichloromethane rectifying condensation method in a kind of synthesis of acesulfame potassium

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CN106349009A true CN106349009A (en) 2017-01-25
CN106349009B CN106349009B (en) 2018-11-06

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10023546B2 (en) 2016-09-21 2018-07-17 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10029999B2 (en) 2016-09-21 2018-07-24 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10029998B2 (en) 2016-09-21 2018-07-24 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10030000B2 (en) 2016-09-21 2018-07-24 Celanese International Corporation Acesulfame potassium compositions and processes for producing same

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CN101157666A (en) * 2007-09-12 2008-04-09 安徽金禾实业股份有限公司 Triethylamine recovery processing method and device for production of acesulfame potassium
CN102126917A (en) * 2010-12-15 2011-07-20 南京大学 High purity recycling and energy integration technology for different concentrations of dichloromethane wastewater
CN105085160A (en) * 2015-08-22 2015-11-25 安徽金禾实业股份有限公司 Method for recycling dichloromethane in acesulfame potassium synthesis process

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CN101157666A (en) * 2007-09-12 2008-04-09 安徽金禾实业股份有限公司 Triethylamine recovery processing method and device for production of acesulfame potassium
CN102126917A (en) * 2010-12-15 2011-07-20 南京大学 High purity recycling and energy integration technology for different concentrations of dichloromethane wastewater
CN105085160A (en) * 2015-08-22 2015-11-25 安徽金禾实业股份有限公司 Method for recycling dichloromethane in acesulfame potassium synthesis process

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10023546B2 (en) 2016-09-21 2018-07-17 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10029999B2 (en) 2016-09-21 2018-07-24 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10029998B2 (en) 2016-09-21 2018-07-24 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10030000B2 (en) 2016-09-21 2018-07-24 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10208004B2 (en) 2016-09-21 2019-02-19 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10227316B2 (en) 2016-09-21 2019-03-12 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10233163B2 (en) 2016-09-21 2019-03-19 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10233164B2 (en) 2016-09-21 2019-03-19 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10590095B2 (en) 2016-09-21 2020-03-17 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10590098B2 (en) 2016-09-21 2020-03-17 Celanese International Corporation Acesulfame potassium compositions and processes for producing same
US10590096B2 (en) 2016-09-21 2020-03-17 Celenese International Corporation Acesulfame potassium compositions and processes for producing same
US10590097B2 (en) 2016-09-21 2020-03-17 Celanese International Corporation Acesulfame potassium compositions and processes for producing same

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