CN106946367A - It is a kind of to be used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, the pretreating agent of crystallization - Google Patents
It is a kind of to be used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, the pretreating agent of crystallization Download PDFInfo
- Publication number
- CN106946367A CN106946367A CN201710198212.9A CN201710198212A CN106946367A CN 106946367 A CN106946367 A CN 106946367A CN 201710198212 A CN201710198212 A CN 201710198212A CN 106946367 A CN106946367 A CN 106946367A
- Authority
- CN
- China
- Prior art keywords
- ethylene glycol
- waste liquid
- coal
- pretreating agent
- tower bottom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/34—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping with one or more auxiliary substances
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
- B01D3/4283—Bottom stream
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Polyethers (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a kind of pretreating agent for being used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, crystallization.The pretreating agent is prepared from by DBSA, dodecyl sodium sulfonate, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene glycol, and its weight ratio is 02: 02: 02: 12.The pretreating agent of the present invention is added in waste liquid by weight the ratio for 0.1 1.8% is sufficiently mixed it, the coal-ethylene glycol waste liquid that can be stablized is used for the separation and recovery of next step, it is to avoid the polymerization of pipeline of the coal-ethylene glycol waste liquid during separation and recovery, pump and rectifying column is blocked.Enable recovery system continuous and steady operation.
Description
Technical field
The present invention relates to a kind of pretreating agent for being used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, crystallization, category
In chemical technology field.
Background technology
Coal-ethylene glycol is the device for producing ethylene glycol by processes such as gasification, coupling, hydrogenation, rectifying by raw material of coal,
In the critical role of occupying of China's coal chemical industry, the built coal-ethylene glycol device of the cut-off end of the year 2015 China has 1,600,000
Just there are three sets of devices for producing 200000 tons per year the production scale of ton, only Henan area, and production capacity, 2016 will be newly-built up to 600,000 tons
Into 1,660,000 tons of coal-ethylene glycol devices.41 covering devices will be built up to the year two thousand twenty is estimated, aggregated capacity reaches 10,260,000 tons.
In the distillation process of coal-ethylene glycol, complicated component in a certain amount of waste liquid, waste liquid can be produced, contains nearly 40
A variety of contents not wait synthesising by-product, but wherein content it is higher be still ethylene glycol and diethylene glycol, both, which add up to, accounts for waste liquid
80% or so of total amount, therefore with higher value.Current processing method is all to carry out conventional distillation by waste liquid
Ethylene glycol and diethylene glycol are reclaimed, but have a problem to be difficult to solve, that is, coal-ethylene glycol waste liquid storage and it is defeated
Easily it polymerize and crystallizes during sending, causes to begin to gather in course of conveying of the raw material from storage tank to rectifying column and in rectifying column
Close and crystallize, Severe blockage delivery pump and conveyance conduit and rectifying device, it is impossible to normally produced.
The solution of existing apparatus is first to install filter additional before rectifying to filter the waste liquid for having produced polymerization,
The course of conveying that filtrate is entered before distillation system rectifying, but filtering again is still blocked seriously, and high energy consumption is caused because of waste liquid simultaneously
The substantial amounts of polymerization waste residue of huge waste and generation for polymerizeing and producing can not be handled.
The content of the invention
The purpose of the present invention exactly be directed to above-mentioned prior art in the presence of weak point and provide a kind of raw material be easy to get,
The good pretreating agent for solving the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, crystallization of low cost, effect.
The purpose of the present invention can be realized by following technique measures:
The pretreating agent for being used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, crystallize of the present invention is by detergent alkylate
Sulfonic acid, dodecyl sodium sulfonate, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene glycol are prepared from, and its weight ratio is 0-2: 0-2: 0-2: 1-2.
The addition of the pretreating agent of the present invention is the 0.1-1.8% of coal-ethylene glycol rectifying tower bottom waste liquid quality.
More specifically, using coal-ethylene glycol rectifying tower bottom waste liquid as raw material, 0.1-1.8% pretreating agent is added, makes it
It is sufficiently mixed, the stable coal-ethylene glycol waste liquid for being difficult polymerization is made, pipe of the waste liquid in conveying and process is solved
The problem of blocking, the coking of road and equipment.
Beneficial effects of the present invention are as follows:
The pretreating agent of the present invention is sufficiently mixed after reaction with coal-ethylene glycol rectifying tower bottom waste liquid, can make pretreating agent and original
The compound of easy polymeric component formation rock-steady structure in material.The coal-ethylene glycol waste liquid of not polymerizable crystallizable steady in a long-term is made,
The polymerizable crystallizable of waste liquid is prevented from source, it is ensured that the stabilization of next step rectification working process is normally run, do not do it is any heating and
Control measure are cooled down, without any three waste discharge, energy-conserving and environment-protective, operating cost are low.
Embodiment
The present invention is further described below with reference to embodiment:
Embodiment 1:
It is prepared by A pretreating agents:6g DBSAs and 6g 90% ethylene glycol solution is taken to be put into container, it is agitated abundant
Pretreating agent is obtained after mixing.
B pretreating effects:1000 grams of undressed coal-ethylene glycol rectifying tower bottoms are added in 2000ml beakers to give up
Liquid, the after measured total content 82.66% containing ethylene glycol and diethylene glycol, wherein ethylene glycol 40.23%, diethylene glycol in waste liquid
42.43%.12 grams of pretreating agent is slowly added dropwise into coal-ethylene glycol rectifying tower bottom waste liquid under agitation to be sufficiently stirred for very
Clock.Obtained sample is placed and is not any change for 480 hours, starts to go out from surface after placing 10 minutes without treated sample
Now it polymerize, all polymerization is integrated in 2 hours.Preprocessed dose of treated 1012 grams of addition rectifying columns of sample are depressurized
Rectifying, rectifying column tower top steams 376.5 grams of ethylene glycol, content 99.05%, the ethylene glycol rate of recovery 92.22%.Diethylene glycol 381.9
Gram, content 99.33%, the diethylene glycol rate of recovery 90.01%.Waste liquid ethylene glycol and diethylene glycol overall recovery 91.08%.
Embodiment 2:
It is prepared by A pretreating agents:8.4g 1-hydroxy ethylidene-1,1-diphosphonic acids and 8.4g 90% ethylene glycol solution is taken to be put into container, it is agitated
Pretreating agent is obtained after being sufficiently mixed.
B pretreating effects:600 grams of undressed coal-ethylene glycol rectifying tower bottom waste liquids are added in 1000ml beakers,
Total content 75.17% containing ethylene glycol and diethylene glycol, wherein ethylene glycol 38.39%, diethylene glycol 36.78% in waste liquid after measured.
9 grams of pretreating agent is slowly added dropwise into coal-ethylene glycol rectifying tower bottom waste liquid under agitation to be sufficiently stirred for 30 minutes.It is obtained
Sample is placed and is not any change for 1080 hours, starts to polymerize from surface after placing 10 minutes without treated sample, 2
All polymerization is integrated in hour.Preprocessed dose of treated 609 grams of addition rectifying columns of sample are subjected to rectification under vacuum, rectifying
Column overhead steams 220.9 grams of ethylene glycol, content 99.13%, the ethylene glycol rate of recovery 92.53%.198.6 grams of diethylene glycol, content
99.02%, the diethylene glycol rate of recovery 89.99%.Waste liquid ethylene glycol and diethylene glycol overall recovery 91.29%.
Embodiment 3:
It is prepared by A pretreating agents:5.1g dodecyl sodium sulfonates and 5.1g 90% ethylene glycol solution is taken to be put into container, it is agitated to fill
Divide after mixing and obtain pretreating agent.、
B pretreating effects:300 grams of undressed coal-ethylene glycol rectifying tower bottom waste liquids are added in 500ml beakers, through surveying
Determine the total content 80.51% containing ethylene glycol and diethylene glycol, wherein ethylene glycol 39.85%, diethylene glycol 40.66% in waste liquid.Will be pre-
3.5 grams of inorganic agent is slowly added dropwise to coal-ethylene glycol rectifying tower bottom waste liquid and is sufficiently stirred for 45 minutes under agitation.Obtained sample
Product are placed and are not any change for 1500 hours, start to polymerize from surface after placing 10 minutes without treated sample, 2 is small
When it is interior all polymerization be integrated.Preprocessed dose of treated 303.5 grams of addition rectifying columns of sample are subjected to rectification under vacuum, rectifying
Column overhead steams 110.9 grams of ethylene glycol, content 99.18%, the ethylene glycol rate of recovery 88.96%.109.8 grams of diethylene glycol, content
99.25%, the diethylene glycol rate of recovery 90.00%.Waste liquid ethylene glycol and diethylene glycol overall recovery 89.65%.
Claims (2)
1. a kind of be used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, the pretreating agent of crystallization, it is characterised in that:It is described
Pretreating agent is prepared from by DBSA, dodecyl sodium sulfonate, 1-hydroxy ethylidene-1,1-diphosphonic acid, ethylene glycol, its weight
Than for 0-2: 0-2: 0-2: 1-2.
2. it is used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, the pretreating agent of crystallization according to claim 1, its
It is characterised by:The addition of the pretreating agent is the 0.1-1.8% of coal-ethylene glycol rectifying tower bottom waste liquid quality.
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CN201710198212.9A CN106946367A (en) | 2017-03-29 | 2017-03-29 | It is a kind of to be used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, the pretreating agent of crystallization |
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CN201710198212.9A CN106946367A (en) | 2017-03-29 | 2017-03-29 | It is a kind of to be used to solve the waste liquid polymerization of coal-ethylene glycol rectifying tower bottom, the pretreating agent of crystallization |
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Citations (7)
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---|---|---|---|---|
CN1505599A (en) * | 2001-04-25 | 2004-06-16 | ������������ʽ���� | Method of inhibiting polymerization of aromatic vinyl |
FR2859988A1 (en) * | 2003-09-18 | 2005-03-25 | Nanoledge | Dispersions of carbon nanotubes in organic solvents, useful in production of composites with e.g. electroconductive properties, prepared using stabilizing combination of surfactant and polymer |
CN1761638A (en) * | 2003-03-17 | 2006-04-19 | 伯东株式会社 | Polymerization inhibitor for aromatic vinyl compounds and method for inhibiting the polymerization of the compounds |
CN101056832A (en) * | 2004-11-15 | 2007-10-17 | 伯东株式会社 | Method of inhibiting polymerization for copolymer containing divinylbenzene and aromatic vinyl compound |
CN101838058A (en) * | 2009-12-31 | 2010-09-22 | 上海良田化工有限公司 | Scale inhibitor of ethylene device process water system and using method thereof |
CN102604762A (en) * | 2012-02-15 | 2012-07-25 | 河南省化工研究所有限责任公司 | Scavenger for clearing away PVC (polyvinyl chloride) polymer in top condenser of polymerization kettle |
CN105483709A (en) * | 2015-12-11 | 2016-04-13 | 青岛唐鹏钢结构工程有限公司 | Steel product corrosion inhibitor |
-
2017
- 2017-03-29 CN CN201710198212.9A patent/CN106946367A/en active Pending
Patent Citations (7)
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CN1505599A (en) * | 2001-04-25 | 2004-06-16 | ������������ʽ���� | Method of inhibiting polymerization of aromatic vinyl |
CN1761638A (en) * | 2003-03-17 | 2006-04-19 | 伯东株式会社 | Polymerization inhibitor for aromatic vinyl compounds and method for inhibiting the polymerization of the compounds |
FR2859988A1 (en) * | 2003-09-18 | 2005-03-25 | Nanoledge | Dispersions of carbon nanotubes in organic solvents, useful in production of composites with e.g. electroconductive properties, prepared using stabilizing combination of surfactant and polymer |
CN101056832A (en) * | 2004-11-15 | 2007-10-17 | 伯东株式会社 | Method of inhibiting polymerization for copolymer containing divinylbenzene and aromatic vinyl compound |
CN101838058A (en) * | 2009-12-31 | 2010-09-22 | 上海良田化工有限公司 | Scale inhibitor of ethylene device process water system and using method thereof |
CN102604762A (en) * | 2012-02-15 | 2012-07-25 | 河南省化工研究所有限责任公司 | Scavenger for clearing away PVC (polyvinyl chloride) polymer in top condenser of polymerization kettle |
CN105483709A (en) * | 2015-12-11 | 2016-04-13 | 青岛唐鹏钢结构工程有限公司 | Steel product corrosion inhibitor |
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