CN104313722A - Method for centrifugally preparing titanium dioxide suspension - Google Patents
Method for centrifugally preparing titanium dioxide suspension Download PDFInfo
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- CN104313722A CN104313722A CN201410615138.2A CN201410615138A CN104313722A CN 104313722 A CN104313722 A CN 104313722A CN 201410615138 A CN201410615138 A CN 201410615138A CN 104313722 A CN104313722 A CN 104313722A
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- titanium dioxide
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- caprolactam
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Abstract
The invention relates to a method for centrifugally preparing titanium dioxide suspension. The method comprises the following steps: preparation of aqueous solution of caprolactam, preparation of the titanium dioxide suspension, centrifugal separation of the titanium dioxide suspension, blending of the titanium dioxide suspension and recovery of rough titanium dioxide. According to the invention, a multistage centrifugal separation technology is adopted to prepare the titanium dioxide suspension with excellent dispersion; compared with an existing grinding centrifuging process for grinding all solid matter, the method weakens the condition that particles have static electricity after being ground so as to cause the tendencies of re-aggregation and flocculation, reduces the probability that suspension particles are rubbed mutually to cause color change, and also effectively reduces mechanical wear to grinding equipment and consumption of ball milling beads. The titanium dioxide suspension prepared by using the method greatly improves quality and the raw material utilization rate of an extinction slice, improves working efficiency, reduces production cost, does not discharge pollutants and has no environmental-friendly cost.
Description
Technical field
The present invention relates to spinning chemical technology field, relate to a kind of centrifugal method preparing tio_2 suspension specifically.
Background technology
Polyamide fibre is the synthetic fiber of superior performance, going rotten, not being afraid of except the performance such as to damage by worms except possessing total corrosion-resistant, resistance to of synthetic fiber, is mainly also that it has powerful high, good springiness, light specific gravity, easy dyeing and the good characteristic such as wear-resisting.But conventional polyamide fibre has significantly reflective and scintillation, people can not be met to its application requirement in industries such as garment decorations.In order to eliminate this phenomenon, titanium dioxide is usually adopted to carry out delustring as delustering agent to it.
With regard to the preparation of tio_2 suspension, the problems such as traditional sedimentation life period is long, titanium dioxide dispersion is uneven, granular size differs, raw material availability is low.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of centrifugal method preparing tio_2 suspension, this tio_2 suspension is used for polyamide fibre delustring.
A kind of centrifugal method preparing tio_2 suspension of the present invention, comprises the steps:
(1), the preparation of caprolactam water solution: add a certain amount of molten caprolactam and desalted water in caprolactam water solution tank, make it fully mix by circulating pump effect, the ratio of caprolactam and desalted water is 4:6;
(2), the preparation of tio_2 suspension: the present invention prepares burden at twice: first time prepares burden, suspension in high-order for thick titanium dioxide basin, titanium dioxide, caprolactam water solution, dispersant are joined in titanium dioxide material-compound tank, is mixed rear feeding titanium dioxide dosing storage tank by high-shear pump and high-shear mixer; Second time batching, joins in titanium dioxide material-compound tank by titanium dioxide, caprolactam water solution, dispersant, is mixed rear feeding titanium dioxide dosing storage tank by high-shear pump and high-shear mixer; Twice prepare material and mixed by high-shear mixer in titanium dioxide dosing storage tank, add caprolactam water solution simultaneously and dilute;
(3), the centrifugation of tio_2 suspension: the suspension in titanium dioxide dosing storage tank sends into centrifuge through titanium dioxide delivery pump, and dispersed phase particle size reaches 1 micron and finely disseminated suspension overflows to titanium dioxide blend tank from the top of centrifuge; The thick titanium dioxide separated in centrifuge, uses caprolactam water solution to rinse to thick titanium dioxide basin;
(4), the allotment of tio_2 suspension: sample analysis is carried out to the suspension in titanium dioxide blend tank, and again add caprolactam water solution and make its titanium dioxide mass fraction reach technological requirement, the tio_2 suspension that final preparation completes is filtered, and then sends into titanium dioxide basin for subsequent use;
(5), the recycling of thick titanium dioxide: thick titanium dioxide enters ball mill through delivery pump, enters the high-order storage tank of titanium dioxide for suspension preparation next time through the suspension of grinding.
Dispersant in described step (2) is calgon.
Beneficial effect of the present invention: the present invention adopts multistage centrifugal isolation technics to obtain finely disseminated tio_2 suspension, isolated thick titanium dioxide is ground, the high-order basin of thick titanium dioxide is recycled to after reaching technological requirement, for suspension formulations next time, adopt first centrifugation on the whole, again corase particles is carried out to the technique of specific aim grinding, in more existing grinding centrifuging process, solid matter is all ground, reduce particle through grinding static electrification thus cause the tendency again gathering and flocculate, reduce phase mutual friction between suspension particle and produce the probability of variable color, also effectively reduce the mechanical wear of milling apparatus and the consumption to ball milling pearl simultaneously.The tio_2 suspension using this method to prepare substantially increases quality and the raw material availability of delustring section, improves operating efficiency, reduces production cost, and non-pollutant discharge, acyclic guaranteed cost.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Detailed description of the invention
The following examples can illustrate in greater detail the present invention, but do not limit the present invention in any form.
Embodiment 1:
As shown in Figure 1, in 01V09, add 2400kg desalted water, open 01P09, make desalted water carry out self-loopa in 01V09, open the cooling water import and export valve of 01V09, in 01V09, add 1600kg caprolactam, keep solution continuous circulation more than 2 hours, until solution mixes.
Open chuck and the pipeline chilled water valve of 01V11, stop 01A11, suspension 400kg in 01V17 is put into 01V11, control 95 liters of caprolactam water solutions to join 01V11 by flowmeter, start 01M12 and 01A11, open dog-house, first 0.15kg dispersant is dropped into 01V11, again 100kg titanium dioxide is slowly added in 01V11, continuous shear stress circulates 4 hours, then stop 01M12 and 01A11, suspension is put into 01V12 from 01V11, open the cooling water import and export valve of 01A12 and 01V12 simultaneously.
Control 840 liters of caprolactam water solutions to join 01V11 by flowmeter, start 01M12 and 01A11, open dog-house, first 0.45kg dispersant is dropped into 01V11, again 300kg titanium dioxide is slowly added in 01V11, continuous shear stress circulates 4 hours, then stops 01M12 and 01A11, suspension is put into 01V12 from 01V11.Then, control 1180 liters of caprolactam water solutions to add in 01V12 by flowmeter, stir after 1 hour, prepare centrifugally operated.
Start 01M13, program will start 01P11, and suspension is sent into centrifuge, stop 01A12 simultaneously.After centrifugation, finely disseminated suspension overflows to 01V14 from the top of centrifuge, opens the cooling water import and export valve of 01V14, when material level is higher than agitator, and turn on agitator 01A14; Isolated thick titanium dioxide in centrifuge, uses caprolactam water solution to rinse in 01V13, when material level is higher than in agitator, and turn on agitator 01A13.
Sample analysis is carried out to the tio_2 suspension in 01V14, control 310 liters of caprolactam water solutions to join 01V14 by flowmeter, reaching result is 20wt% ± 0.2wt% criterion of acceptability, and it is for subsequent use that the titanium dioxide finally configured puts into titanium dioxide basin after 01F11 filters.
Start 01P12, and then start ball mill 01M14, suspension is sent into 01M14, stops agitator 01A13 simultaneously, from ball mill out, the suspension through grinding enters 01V17, and when material level is higher than agitator, turn on agitator 01A17, waits for and preparing burden next time.
Claims (2)
1. the centrifugal method preparing tio_2 suspension, is characterized in that, comprise the steps:
(1), the preparation of caprolactam water solution: add a certain amount of molten caprolactam and desalted water in caprolactam water solution tank, make it fully mix by circulating pump effect, the ratio of caprolactam and desalted water is 4:6;
(2), the preparation of tio_2 suspension: the present invention prepares burden at twice: first time prepares burden, suspension in high-order for thick titanium dioxide basin, titanium dioxide, caprolactam water solution, dispersant are joined in titanium dioxide material-compound tank, is mixed rear feeding titanium dioxide dosing storage tank by high-shear pump and high-shear mixer; Second time batching, joins in titanium dioxide material-compound tank by titanium dioxide, caprolactam water solution, dispersant, is mixed rear feeding titanium dioxide dosing storage tank by high-shear pump and high-shear mixer; Twice prepare material and mixed by high-shear mixer in titanium dioxide dosing storage tank, add caprolactam water solution simultaneously and dilute;
(3), the centrifugation of tio_2 suspension: the suspension in titanium dioxide dosing storage tank sends into centrifuge through titanium dioxide delivery pump, and dispersed phase particle size reaches 1 micron and finely disseminated suspension overflows to titanium dioxide blend tank from the top of centrifuge; The thick titanium dioxide separated in centrifuge, uses caprolactam water solution to rinse to thick titanium dioxide basin;
(4), the allotment of tio_2 suspension: sample analysis is carried out to the suspension in titanium dioxide blend tank, and again add caprolactam water solution and make its titanium dioxide mass fraction reach technological requirement, the tio_2 suspension that final preparation completes is filtered, and then sends into titanium dioxide basin for subsequent use;
(5), the recycling of thick titanium dioxide: thick titanium dioxide enters ball mill through delivery pump, enters the high-order storage tank of titanium dioxide for suspension preparation next time through the suspension of grinding.
2. a kind of centrifugal method preparing tio_2 suspension according to claim 1, it is characterized in that, the dispersant in described step (2) is calgon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410615138.2A CN104313722B (en) | 2014-11-05 | 2014-11-05 | A kind of centrifugal method preparing tio_2 suspension |
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| CN201410615138.2A CN104313722B (en) | 2014-11-05 | 2014-11-05 | A kind of centrifugal method preparing tio_2 suspension |
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| CN104313722A true CN104313722A (en) | 2015-01-28 |
| CN104313722B CN104313722B (en) | 2016-03-30 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350106A (en) * | 2015-12-01 | 2016-02-24 | 北京三联虹普新合纤技术服务股份有限公司 | Method for preparing delusterant suspension |
| CN109621832A (en) * | 2019-01-09 | 2019-04-16 | 长乐力恒锦纶科技有限公司 | A kind of the pilot scale mixing system and method for titanium dioxide suspension |
| CN109778331A (en) * | 2018-12-29 | 2019-05-21 | 浙江恒逸锦纶有限公司 | A kind of nylon polymerization tio_2 suspension and preparation method thereof |
| CN110283357A (en) * | 2019-06-11 | 2019-09-27 | 聊城煤泗新材料科技有限公司 | A kind of titanium dioxide method for separating and processing and its application |
| EP3620494A1 (en) | 2018-09-06 | 2020-03-11 | Holland Novochem Technical Coatings B.V. | Rheology modifier and compatibilizer |
| CN111848948A (en) * | 2020-06-30 | 2020-10-30 | 聊城市鲁西化工工程设计有限责任公司 | Addition system and process of environment-friendly nylon 6 delustering agent solution and nylon 6 production system |
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| KR0140197B1 (en) * | 1991-04-24 | 1998-07-01 | 공정곤 | Preparation of polyamide which is improved in light stability |
| CN1714179A (en) * | 2002-11-22 | 2005-12-28 | 可隆株式会社 | A full dull polyamide 6 yarn, and a process of preparing for the same |
| CN2885425Y (en) * | 2006-04-13 | 2007-04-04 | 上海联吉合纤有限公司 | Centrifuger for titanium dioxide preparation in polyester production |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105350106A (en) * | 2015-12-01 | 2016-02-24 | 北京三联虹普新合纤技术服务股份有限公司 | Method for preparing delusterant suspension |
| EP3620494A1 (en) | 2018-09-06 | 2020-03-11 | Holland Novochem Technical Coatings B.V. | Rheology modifier and compatibilizer |
| WO2020049180A1 (en) | 2018-09-06 | 2020-03-12 | Holland Novochem Technical Coatings B.V. | Rheology modifier and compatibilizer |
| CN109778331A (en) * | 2018-12-29 | 2019-05-21 | 浙江恒逸锦纶有限公司 | A kind of nylon polymerization tio_2 suspension and preparation method thereof |
| CN109621832A (en) * | 2019-01-09 | 2019-04-16 | 长乐力恒锦纶科技有限公司 | A kind of the pilot scale mixing system and method for titanium dioxide suspension |
| CN110283357A (en) * | 2019-06-11 | 2019-09-27 | 聊城煤泗新材料科技有限公司 | A kind of titanium dioxide method for separating and processing and its application |
| CN111848948A (en) * | 2020-06-30 | 2020-10-30 | 聊城市鲁西化工工程设计有限责任公司 | Addition system and process of environment-friendly nylon 6 delustering agent solution and nylon 6 production system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104313722B (en) | 2016-03-30 |
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Effective date of registration: 20171011 Address after: 415001 Hunan province Changde City Deshan economic and Technological Development Zone, Road No. 27 Patentee after: Changde Hai Xin new material Co., Ltd. Address before: 415001 Changde city of Hunan province Changde economic and Technological Development Zone Hill Road No. 27 Patentee before: HUNAN JINBO CHEMICAL FIBER CO., LTD. |
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Granted publication date: 20160330 Termination date: 20191105 |