JPS5959990A - Deinking of used paper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method for deinking printed waste paper using the 1-de-jon method, by using a specific non-inorganic surfactant + 1 effect 11 as a deinking agent. This paper relates to a method of deinking waste paper characterized by removing high-crystalline paper and producing pulp.

In recent years, the use of waste paper in the paper manufacturing industry has increased by +4F due to the economic efficiency of saving capital and energy by 1'K%.
&, J: I am following the path of Soka. At the same time, L
The scope of its use is expanding, and in addition to its traditional use as a raw material for paperboard and differential paper, it has recently been used as a raw material for paperboard and paperboard, as well as paperboard and high-quality paper. When deinked pulp is used as a raw material for second-grade paper, which is often used as a papermaking raw material, it is an essential condition to improve the quality of the deinked pulp. Recently, establishing a technology to manufacture high-quality valves at an economical cost has become one of the key themes in the paper industry.

Deinking methods can be broadly divided into washing methods and flotation methods, but the flotation method is a water-saving method and has a low burden on wastewater treatment, so it is the most popular deinking method in recent years.

R as a deinking agent used in flow duration method
J: -alkyl sulfate, α-I/finsulfone), anionic surfactants such as furkylbenzenesulfonate, polyoxyethylene alkyl ether, polyoxynibenzene alkyl phenol,
Polyoxyethylene alkyl ester Kukon's non-1,+
Examples include surfactants and fatty acid soaps.

However, this divine surfactant ~j and one stone are not necessarily satisfactory as an ink agent for flotation. That is, the anionic W surfactant and nonionic surfactant have the effect of removing ink from the pulp e71. Although it is excellent, the ink collecting power in flow dension is inferior. On the other hand, fatty acid stone M1. On the other hand, although it has excellent ink-collecting power, it has a poor ability to remove ink from the pulp, and it also has the disadvantage that sufficient foaming cannot be obtained in flow duration.

As a method of compensating for the mutual disadvantages of surfactant-based deinking agents and fatty acid soap-based deinking agents, there are examples in which a method is adopted in which both are used in combination.

However, although this method improves the culmability, which has both drawbacks, the advantages are also diminished, and it is difficult to say that it is a satisfactory method.

As a result of intensive research to numerically solve the above drawbacks, the present inventors found that
Nonionic surfactants with a certain amount of oxypropylene groups are often used in combination with epoxy compounds or incyanate compounds (new types of nonionic surfactants are extremely effective for flotation deinking). The present invention was developed based on the discovery that the above-mentioned performance can be fully demonstrated.

The feature of the method of the present invention is that, compared to conventional methods, it is extremely superior in terms of the ink separation effect 11f2 from the pulp and the ink collection effect during flotation. Therefore, cleaning process after flotation is required when using conventional deinking agents with poor ink collection ability48
f! In the present invention, it is unnecessary to set Vi at ξ, or it is sufficient to cast kj very simply.

Since there is almost no striped residual ink in the pulp slurry after flotation, the method of the present invention causes a decrease in the whiteness of the deinked pulp due to the ink in the water, even if the water is closed. Never. Furthermore, the method of the present invention can also treat shaving ink, for which flotation treatment was difficult in conventional methods.

The deinking agent used in the method of the present invention is a surfactant represented by the following general formula (1).

General formula (where R is an alkyl group having 8 to 22 carbon atoms, an alkenyl group, or an alkylaryl group having an alkyl group having 8 to 12 carbon atoms, (Xo)n and (YO)ti, tpolyoxyalgylene group, and (X o) × m + (X
O) t is C, H, O group 50% to 90% (l amount), C,
Mixed polyoxyalkylene υN U consisting of H, 0 groups 50% to 1O% (sentries, )
Q (where B is a divalent hydrocarbon) r, ), I
t, is the same as R, or a residue of di- to octavalent alkaline: 1-, n and t are integers of θ to 200, and n + 1 is a number of 20 to 400; Indicates a number that is the same as or less than the valence of mke ■ 工. ) Among the compounds represented by general formula (1), A is 10H, -C
For the TT-HCTl, - group, a polyalkylene glycol needle-type non-ionic surfactant is prepared by adding an alkylene oxide to a higher alcohol and a higher alcohol or alkylphenol by a conventional method, and then 1 mol of the nonionic surfactant is reacted with 1 mol of epichlorohydrin using an acidic catalyst, further 1 mol of caustic soda is added to remove salt to form an epoxy group, and an acidic catalyst is added again to produce 1 mol of epichlorohydrin. This can be achieved by adding a nonionic surfactant.

Instead of epichlorohydrin, it can also be obtained by directly reacting a polyglycidyl ether obtained by glycidyl etherifying a polyhydric alcohol or a polyhydric polyether polyol with the non-imene surfactant of d1 above using an acidic catalyst.

On the other hand, A is -C-NIr13NIT-C- (However, if B is 21
11'Ii Hydrocarbon II' 1
1 0 0 ), either 2 mol of the nonionic surfactant and 1 mol of diisocyanate are subjected to a face reaction, or 1 mol of the nonionic surfactant and 1 mol of diisocyanate are separated.
It can be obtained by first reacting moles and then reacting a polyhydric alcohol or a polyhydric polyether polyol.

Deinking agent 'f used in the method of the present invention: The higher alcohols used in the production include lauryl alcohol, stearyl alcohol, oleyl alcohol, and oxyalcohol, including -1 alkyl phenol and L'
Examples include l-1 octylphenol, nonylphenol, and dinonylphenol.

Polyglycidyl needle, ethylene glycol diglycidyl needle, dalepyrene glycol diglycidyl ether, glycerol triglycidyl ether, diglycerol triglycidyl ether, vinyl tetraglycidyl needle, poly]: V-cypropylene poly These include Oxyeg' Diglyzodyle Edel and Polyoxyethylene Bolyi°7V Novropitone Glycerol Ether Diglycidyl Edel.

In addition, diisocyanate and tt', 2-4-tolylene diisocyanate), 1-4 naphdylene diisonoanate,
These include 1e3-phenylene diisocyanate, tolidine diisocyanate, and detramethylene diisocyanate.

Used in the production of the compound represented by the general formula () used in the method of the present invention (1 molyte alkylene oxide dissolved in ethyl oxide → J ide and propylene oxide. Added mole of alkylene oxide. The number is in the range of 0 to 2 fl 0 mol for higher alcohol or alkylphenol and di- to octahydric alcohol, respectively, and the number of added moles of higher alcohol or alkylphenol and di- to octahydric alcohol (=J addition). 7 mole number is 20 to 400 moles, but the preferable range from the viewpoint of effect is 1, and the 11th number of moles added is 5 () to 2.
The range is 001 nyl.

Further, the ratio of ethylene oxide to propylene oxide is in the range of 5() to 90(@light). If the ratio of nib 1,/n 1 key lead is more than 50 inches (1 useful), the polymerization rate will be poor, and if the ratio is less than 90 points (1 (useful)), In the north, d, ・into 'urai (4 characters are boiled, so it is preferable [2 is not. Ethylene oxide → 1 id and propylene 1/n oya - I7 id's combined form lie is lanthano, polymerization or bronc polymerization. But there is no difference.

The method of the present invention involves the compound i represented by the general formula (1) in an amount of 01% to 1.0% (jK it,
) is used. It is also possible to use a conventionally known deinking agent in combination.

The types of waste paper targeted for de-crystallization are Shinkyokushi, T! ! I1
．． fl1 paper, magazines, general paper - used paper for printing.

Next, Examples of the present invention will be shown. 40) 2560 g (1 mol) of oxyethylene ly(1o)oxypropylene nonylphenyl ether (oxyethylene and oxy/propylene IrJ, Landano, polymerization) was added to 4'I, hv, = t, and trifluoride was added. Boron chloride needle = 1 complex 25 ji? r: JJI
I*7, Shiniehi Chlorhydrin 92.5.8i (+'
Use 9()℃f21f#l "17"6111
°7・3 Next, after cooling to 70°C, 48-occupied sodium chloride l' + 3.34 (1 mol) was added, and the mixture was heated for 1 hour.
1. After 1 step, dehydrated at 80℃ and 1011H5', then filtered with salt (A).
, 5 mol) in another four [-1 flask, boron difluoride needle complex 13.9 and poly(40)
Oxye'f-1/Mboli (10) Oxyglobylene nonylphenol efful (landano, il'j combined type)
Add 128 (1 g (0, fi mol)) at 5°C: 2
A time reaction was carried out to obtain Invention Product I Gold A21, and Invention Products 2 to 3 were obtained in the same manner as Q.

Example: Add poly(40) oxypropylene poly(25) oxyethylene lauryl ether (block combination t-<Q
) a 400 g (1 mol) and glycerol triglyceride and (17 g of boron trifluoride were added at 80°C).
) Terao Tanio and Inventive Product 4 were obtained. Hereinafter, Inventive Products 5 and 6 were obtained in the same manner.

Example: Add poly(3(1) oxynib(7) to a 1" flask with stirrer, warm 1f(cut, nitrogen gas inlet tube)
2 (1) Take 2760 g (1 mol) of dipropylene oleyl needle (Bunock LW mold)],
0 0 U 5 mr. After dehydration for 20 minutes at a ratio of
(0.5 mol)'fC? +l'ii to L, 8
The reaction was carried out at 0°C to 90°C for 2 hours to obtain product 7 of the present invention.

The present Imei crystals 8 to 9 (r-) were obtained in the same manner.

Example ■ IW. Stirring] (1st temperature 1, 4 tubes with nitrogen gas introduction tube [-1
Add 2992 g (1 mol) of poly(60) oxypropylene glycerol to a flask and heat at 100°C for 5 hours.
- After delking for C2o minutes, 564 g (3 mol) of A-lylene diincyanate was added dropwise in nitrogen gas, F' L, 80°C.
Start the reaction at ~90°C for 2 hours.

Next, I dehydrated the water in advance and the water was 11゛゛〆1゛ (
4 (1) 4 ethylene nonyl noego. Le Ding Σ
° 5 ++ 4 o g (3 moles) - Add 80℃~
9) Incubate the product 11 of the present invention for 2 hours at 0°C.
I was.

Hereafter, use the same method to prepare book 1ﾾlight product z4・i fathom.

(2) Deinking test method Used newspaper (letterpress printing paper 7 (1st), letterpress printing paper 30
%) 'I 1.5L-m x 1.5cm (, υ cut and separate) qi (Put it in a tube, 15 g of caustic soda (for waste paper), 3 g of No. 3 sulfuric acid soda (for waste paper), 35 g. Add 3 liters of J1 station hydrogen oxide water (for used paper) and the above ψ (obtained by the J-pickling method), add 0.3% of shavings (for used paper), add water and add 5 liters of waste paper. After heating to 55℃], IiI(f
Vf(L f?-.

After disaggregation, ripen at the same temperature for 1 hour and then valve? n degree 0.8
Dilute it with the person in charge and put it in a flow booter, 〕〕11-boo'
/Yo 7 M. f: I went in'l for 10 minutes. After the flow dye treatment, the bulbs were diluted to 05% and hand-sheeted using a sheet machine specified in JIS P-82 (19).

After drying, the handmade paper was subjected to the following measurements to evaluate the deinking effect.

Whiteness: Jl. S fist P-8132)'. t1, measured based on Hiroshi's method.

Remaining ink Algebra 2 Observe the paper surface magnified 120 times with a microscope, count the remaining ink in the field of view by classifying it into large, medium, and small, and multiply the remaining ink by the coefficients in Table 1. was taken as the number of remaining inks.

In the table, (PO) indicates propylene oxyside, and (EO) refers to ethylene oxide, and (, PO) (FX,
.

indicates random polymerization, and (PO) (EO) indicates block jointing.

(B) Deinking W・(≠Result Table 3 The results in Table 3 show) This shows that the deinking performance of the invented product is extremely superior compared to conventionally used deinking agents.

In addition, the ink drainage effect during flow printing (r-observation revealed that a large amount of ink leaked out at the beginning of the flow of products 1 to 11d1 of the present invention, and no more ink was observed to flow out after 10 minutes. On the other hand, the ratio axis products i and 2t: The ink extraction force was inferior and the ink flow was clearly lower than the product of the present invention.

In addition, in the case of Comparative Product 3, the ink collection 1〆■- is somewhat good, but what about the ink collection during flow? The ink floss did not come out properly from the flow datater.

Claims (1)

[Scope of Claims] General formula (wherein RVi is an argyl group having 8 to 22 carbon atoms, an alkyl group, or an alkylaryl group having an alkyl group having 8 to 12 carbon atoms, (XO)n and (YO)t are A polyoxyalkylene group, and (X O) m4-(YO)
z is C, H, 0 group 50-90% (heavy I!'), Cs
He A mixed polyoxyalkylene group consisting of 50 to 10% (@N) O groups, A is -CH, ClICTl, -1 or -C-N IIB N I (-e -1111 OH00 (However, B-12 valent hydrocarbon group), R, or a residue of a di- to octahydric alcohol, n and tV are integers from 0 to 200, and n -1-1 is 2
Using a deinking agent containing one or more of the compounds represented by the following formula: a number ranging from 0 to 400, where m is the same number as or less than the valence of R1. 4. Characteristics and 4 methods of deinking waste paper.