CN1153540A - Method for controlling a flowing cellulose suspension - Google Patents
Method for controlling a flowing cellulose suspension Download PDFInfo
- Publication number
- CN1153540A CN1153540A CN 96190455 CN96190455A CN1153540A CN 1153540 A CN1153540 A CN 1153540A CN 96190455 CN96190455 CN 96190455 CN 96190455 A CN96190455 A CN 96190455A CN 1153540 A CN1153540 A CN 1153540A
- Authority
- CN
- China
- Prior art keywords
- suspension
- container
- cellulose
- vessel
- pump
- 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.)
- Pending
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- 239000000725 suspension Substances 0.000 title claims abstract description 47
- 229920002678 cellulose Polymers 0.000 title claims abstract description 27
- 239000001913 cellulose Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 125000001302 tertiary amino group Chemical group 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 150000003512 tertiary amines Chemical class 0.000 abstract 1
- 150000001412 amines Chemical class 0.000 description 7
- LFTLOKWAGJYHHR-UHFFFAOYSA-N N-methylmorpholine N-oxide Chemical compound CN1(=O)CCOCC1 LFTLOKWAGJYHHR-UHFFFAOYSA-N 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000433 Lyocell Polymers 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention relates to a method for controlling a flowing, comminuted cellulose suspension in a liquid, aqueous tertiary amine oxide, characterized by the combination of the following measures: introducing the suspension into a vessel having a suspension inlet, (B) transporting the suspension introduced into the vessel through the vessel and (C) discharging the suspension transported through the vessel from the vessel through an outlet; in this process (D), the weight of the container is measured and the feed or discharge of the suspension is controlled with a deviation from a predetermined value.
Description
The present invention relates to a kind of method that is controlled at the cellulose suspension that flows in the moisture tertiary amino oxides.For the purpose of originally declaring, term " control " also can be regarded as to be measured and regulates.
In decades, seeking the method for making the cellulose forming body, to replace the viscose method of present extensive use always.As a kind of attractive substitution technique that especially is fit to environmental requirement, have been found that and cellulose need be able to not derived and be dissolved in a kind of organic solvent and be extruded into body, as fiber, film and other formed body by this solution.The fiber that this class is extruded obtains generic name Lyocell.BISFA by BISFA (BISFA) and organic solvent is interpreted as the mixture that is made of a kind of organic chemicals and water.
Show that as a kind of organic solvent, the mixture that is made of a kind of tertiary amino oxides and water extremely is applicable to manufacturing cellulose forming body.At this,, mainly use N-methylmorpholine-N-oxide (N-Methyl morpholin-N-Oxid) (NMMO) as amine oxide.Other amine oxide had for example been done narration in patent EP-A-0 553 070.A kind of method of making plastic cellulose solution was for example disclosed by patent EP-A-0 356419.Use tertiary amino oxides to make the cellulose forming body and generally be referred to as the amine oxide method.
In patent EP-A-0 356 419, but narrated a kind of amine oxide method of cellulose solution of spinning, this method uses cellulose suspension in the moisture N-methylmorpholine-N-oxide (NMMO) of liquid as base stock.This method is suspension step ground and change into a kind of plastic solution continuously in a film treating apparatus.At last, plastic solution for example is spun into long filament in a spinneret at a mould, is guided through the precipitating bath place.
As mentioned above, as the base stock of making plastic cellulose solution, use be a kind of cellulose suspension in moisture tertiary amino oxides.Promptly make above-mentioned solution in the amine oxide solution that the plain input of comminuted fibres is moisture.Then, this solution also can be transformed into cellulose solution by after further homogenizing.To this, preferably adopt a kind of film treating apparatus of for example producing, Filmtruder by Switzerland Booth Co..In the film treating apparatus, be adjusted to the sort of concentration ratio that can make cellulose dissolution according to the phasor (for example seeing patent WO 94/28212) of ternary mixtures of materials cellulose/water.
The metering of cellulose suspension more accurately, then the result that reached of amine oxide method is also better.Yet because the denseness of suspension, for the purpose of amine oxide method, the flow of controlling this class suspension is with regard to inaccuracy.Owing to reasons such as the inhomogeneities of fibrous suspension, bubbles, with traditional material flow meter, the measurement mechanism of for example responding to current meter or using Coriolis (Coriolis) measuring principle be impossible accurately control mobile suspension or accurately measure.
Therefore, the purpose of this invention is to provide a kind of method, can carry out a kind of suspension flow of comminuted fibres element controlling better than already known processes level with it.
The method of the suspension flow of comminuted fibres element in the moisture tertiary amino oxides of controlling liquid of the present invention is characterized in that the combination of following measure:
(A) one of suspension input is had in the container of suspension charging aperture,
(B) make the suspension of input pod pass container and carry, and
(C) make by the suspension of container transport and discharge by container by a discharging opening; In this process
(D) weight of measuring vessel, and control the charging or the discharging of suspension with pre-determined setting error according to one.
Show, with pressing method of the present invention, than the flow that can control suspension with traditional current meter more accurately.
By method of the present invention, be particularly suited for controlling a kind of flow with cellulose suspension of following composition:
Cellulose: 12-15%, by mass
Water 18-25%, by mass
Tertiary amino oxides 60-65%, by mass
At this, percentage by mass is for the gross mass of the material that suspends.
A preferred embodiment by method of the present invention is, uses a pump or other transport as container.
Another preferred embodiment by method of the present invention is, uses a buffer container as container.Use a buffer container to match and also proved suitable with a pump or a transport.
To illustrate in greater detail the present invention with following embodiment.Embodiment:
Experimental rig is substantially by forming with lower device: a storage container, an eccentrie helical totorpump, model is Netzsch Mohno 2NSP30, with this pump a kind of cellulose suspension is input to a film treating apparatus from storage container, a scale (pressure load-weighing unit, and an electronic regulating unit manufacturer:, press the power of weighing result control pump Hamburg, Germany Philips weighing technology company) with it.Storage container and eccentrie helical totorpump are positioned at and deserve to be called, and with this scale measurement the storage container of screw pump are housed, and comprise the gross weight of contained cellulose solution wherein.
Cellulose suspension is made by flexible material certainly from the pipeline of storage container input film treating apparatus, thereby can not be influenced weighing result.
Cellulose suspension has following composition, by mass: cellulose: 12.5%, N-methylmorpholine-N-oxide: 63.5%, water: 24.0%, more than for total material.
Electronic regulating unit is so programming, make its can control pump efficient to following degree, promptly scale can write down one be accurate to as far as possible 300 kilograms/time the weight owing to the cellulose suspension that is transferred reduce.
In order to test, in 15 seconds, the suspension of being carried by pump to be weighed respectively 18 times and infer that dimension is the suspension flow in kilogram/time.Following table is interior by expressing this result in suspension flow of the present invention one hurdle.
In order to contrast, cellulose suspension is exported from identical storage container with same pump, but the efficiency of pump is regulated not according to the present invention, but with a traditional induction current meter (PROMAG type that is loaded on behind the pump, manufacturer: Endress and Hauser) and answer control pump power, be accurate to equally as far as possible 300 kilograms/time.In 18 seconds the time interval, drawn 18 measured values (suspension flow, with kilogram/time represent), they all show in " suspension IDM " hurdle in following table.
Table
Measure numbering suspension flow suspension flow amount
IDM the present invention
1 248 291
2 236 294
3 223 300
4 240 303
5 219 300
6 246 291
7 261 300
8 245 304
9 221 298
10 232 301
11 258 303
12 234 297
13 219 291
14 238 303
15 226 293
16 240 300
17 270 304
18 224 303
Mean value: 237.78 298.67
Standard error: 14.96 4.72
From above-mentioned table, can find out, control or regulate the suspension flow more accurately than reaching with the induction current meter by the present invention.
Claims (5)
1. the method for the plain suspension of the comminuted fibres that flows in the moisture tertiary amino oxides that is used for controlling liquid is characterized in that the combination of following measure:
(A) one of suspension input is had in the container of suspension charging aperture;
(B) make the suspension of input pod pass container transport, and
(C) make by the suspension of container transport and discharge by container by a discharging opening; In this process
(D) weight of measuring vessel, and according to a charging or a discharging with the error control suspension of pre-determined setting.
2. by the method for claim 1, it is characterized in that: the suspension by measure (A) input pod has following composition, by mass:
Cellulose: 12-15%
Water: 18-25%
Tertiary amino oxides: 60-65%
Below percentage by mass is for the gross mass of suspension.
3. by the method for claim 1 or 2, it is characterized in that: use a pump as container.
4. by claim 1 or 2 method, it is characterized in that: with a buffer container as container.
5. by the method for claim 1 or 2, it is characterized in that: container comprises a pump and a buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96190455 CN1153540A (en) | 1995-05-04 | 1996-03-25 | Method for controlling a flowing cellulose suspension |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA763/95 | 1995-05-04 | ||
| CN 96190455 CN1153540A (en) | 1995-05-04 | 1996-03-25 | Method for controlling a flowing cellulose suspension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1153540A true CN1153540A (en) | 1997-07-02 |
Family
ID=5128039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96190455 Pending CN1153540A (en) | 1995-05-04 | 1996-03-25 | Method for controlling a flowing cellulose suspension |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153540A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113027A (en) * | 2015-08-29 | 2015-12-02 | 山东英利实业有限公司 | Pre-mixing device used for lyocell fiber preparation |
-
1996
- 1996-03-25 CN CN 96190455 patent/CN1153540A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105113027A (en) * | 2015-08-29 | 2015-12-02 | 山东英利实业有限公司 | Pre-mixing device used for lyocell fiber preparation |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |