DE1048472B - Process for combating congestion and blockages in. Line systems and apparatus, primarily in the pulp, Holzschhff, paper and cardboard industries - Google Patents

Description

GERMAN

B42270IVa / 55b

REGISTRATION DAY; OCTOBER 26, 1956

NOTICE THE REGISTRATION AND ISSUE OF THE EDITORIAL:

8 JANUARY 959

In the pulp, wood pulp, paper and cardboard industries, pulp and paste-like preparations are constantly being used to transport and process. These contain foams and slimes, some of which are mechanical and previous chemical treatment processes originate, are partly produced by microorganisms and possibly also from Colonies of such exist. These slimes and foams settle on the walls of pipelines and kettles and, when they have grown to a certain thickness, loosen unexpectedly and uncontrollable by the walls, which leads to unpleasant malfunctions due to occurring Congestion and even clogging of pipelines comes about. It is already known to help prevent Adding complexing agents such as polyphosphates to deposits in pipelines in the pulp industry.

It has now been found that such hindrances to the material throughput hardly occur any more or much less frequently, when adding compounds of the general formula to the sludge or pulp to be transported

R ₁ ,

; n — c — s — R,

added, where R ₁ and R ₂ each represent an aliphatic, aromatic radical or two members of a common ring and R _{3 is} a metal, an amine, carbamate or

—S — c — n;

-Rest

and R ₄ and R _{5 are} radicals such as R ₁ and R ₂ .

As far as the approaches to the pipe walls, etc. with the presence of microorganisms and the under The compounds can be attributed to any slimes and foams that may arise under their influence of the aforementioned class of substances, if appropriate with other specifically growth-inhibiting, fungicidal, bactericidal and / or algicidal agents are used together.

Above all, however, it has proven useful, the inventive substances to be used together with condensed phosphoric acids and especially their salts to use, although it is advantageous, but mostly not necessary, that the use of phosphates and, if appropriate, of the aforementioned growth-inhibiting substances locally in the same place as that of the thiurams he follows.

Method for combating congestion and blockages in pipe systems and apparatus, mainly in the

Pulp, wood pulp, paper

and cardboard industry

Applicant:

Joh. A. Benddser G. mb H _M

Chemical factory, Ludwigshafen / Rhein, Frankenthaler Str. 3

Condensed phosphates are primarily intended to be the soluble or solubilized alkali salts Pyrophosphoric acid, polyphosphoric acids, metaphosphoric acids including their ammonium salts as well as complexes of alkali phosphates with alkaline earths or other optionally bactericidal, fungicidal and / or insecticidal metals as well Imidophosphates, such as those produced by the condensation of urea with phosphoric acid or by other means. The phosphate complexes can be completely or partially saturated by other metals. In the end the condensed phosphoric acids can also be connected in a salt-like manner with organic bases, with as the latter can optionally be selected that, such as oxyquinoline or oxyquinoline derivatives algicidal, can have bactericidal or fungicidal effects. In addition to extensive or complete suppression of approaches to pipe etc. walls, with their dreaded consequences, results from the addition of compounds the thiuram class on its own and in particular together with condensed phosphates have various other advantages.

It has been shown that the slurries, slurries, etc. prepared from the treated according to the invention Finished products such as paper, cardboard and the like are free from defects and less prone to subsequent changes are harmful influences during storage.

Another advantage of the agents is that they are non-toxic, so the wastewater containing them is harmless Rivers can be channeled and the entanglement of the

¹ »09 728/96

3 4

Finished products such as paper, cardboard and the like, in which they disulfide, 75 g of tetraethylthiuram disulfide and 100 g of tetra anyway only get in extremely small amounts, no methylthiuram monosulfide on the grindstone, in the grinder's barriers are set. trough or clogged out of it when leaving the cut.

The following table contains a list of im;

For the purposes of the present invention, particularly preferred 5 BeisDiel 7

Thiuram compounds and mixtures of them. P.

400 g of sodium tripoly-

Tetramethylthiuramdisulnd phosphate, 40 g Tetra-S-chloro ^ -bromo-S-oxyquinolinium-

Tetramethylthiuram disulfide \ in a mixture pyrophosphate, 20g tetra-5-chloro-7-iodo-8-oxyquinolinium

Tetraäthylthiuramdisulfid j particularly effective ¹⁰ pyrophosphate and 5 g of tetramethylthiuramdisulfid im

_ _A. ,,. ..,.,. . ". , Dutch incorporated.

Tetramethylthiuram disulfide ) in a mixture °

Tetramethylthiuram monosulfide J particularly effective Example 8

Tetramethylthiuram disulfide) in admixture special 97 ° / ₀ of a crushed phosphate glass melt with

Dimethyldiphenylthiiiramdisuliid J ders effectively 15 of the following composition, with the individual grain

Zinkäthylphenyldithiocarbamat components about 50 parts of sodium pyrophosphate, 58 parts

Disodium ethyl bisdithiocarbamate sodium polyphosphate and 42 parts of a sodium

Sodium ether bisdithiocarbamate polyphosphate mixture, which in its average

Zinc ethylene bisdithiocarbamate 'Composition is a sodium heptapolyphosphate

Sodium dimethylditliiocarbamate ^ao speaks be, with 3 »/ ₀ tetramethylthiuram-

Zinc dimethyldithiocarbamate disulfide mixed well

Iron dimethyldithiocarbamate The above mixture is in an order of magnitude

from about 0.1 to 1% wet pulp preparations

. . . given. The above combination has proven to be special

ISp 85 proven effective to relieve clogs and congestion too

On 100 kg of paper stock, 20 g of tetramethyl will fight.

thiuram disulfide and 25 g of dimethyldiphenylthiuram disul- Example 9

fid admitted. The addition can take place in the Holländer ^p

at the beginning of the grinding in powder form dry or 97% of a ground phosphate glass melt with

dissolved in acetone or slurried in mixing vats 30 approximately the following composition: 50 parts of sodium pyro-

and similar apparatus. phosphate, 52 parts of sodium tripolyphosphate, 48 parts of a

. . Sodium polyphosphate mixture, which in its thorough-

Example of the composition of a sodium hexapoly-

For 100 kg of paper stock, 160 g of sodium tripoly-phosphate are equivalent, with 3% tetramethylthiu-

Phosphate, 20 g tetramethylthiuram disulfide and 25 g 35 ram disulfide mixed well.

Dimethyldiphenylthiuram disulfide added. The addition of the above product has turned out very well in the Dutch or at the latest on the paper- suitable to prevent blockages and jams, machine. when it is added between 0.1 to 1% of the pulpy preparations to be conveyed, B stnel 3. As far as the

40 Blockages and jams of only a minor degree

To 100 kg paper stock 170 g of copper Graham are often suffice even only 0.01 to 0.3 ° / ₀ as an additive

salt complex and 25 g of tetramethylthiuram disulfide from the above mixture,
set and in the processing equipment, such as in

Hollander, pulper or pan mill incorporated. Example 10

When using the mentioned phosphate thiuram 45

Combination in the form of a common wet encryption 50 ° / ₀ of a phosphate glass melt with the following feed

Grinding can also be done on the paper machine. Composition: 50 parts of sodium pyrophosphate, 58 parts

take place. Sodium tripolyphosphate, 42 parts of a sodium poly-

BeisD'el 4 phosphate mixture, which in its average

'50 composition consists of a sodium heptapolyphosphate

For 100 kg of paper stock, 100 g of tetra-5-chloro-speak are made with 50% tetramethylthiuram disulfide Grind 7-iodo-8-oxycninolinium pyrophosphate and 100 g of Tetra together to form a powdery product. S-chloro ^ -bromo-S-oxyquinolinium pyrophosphate in the Hol- The above mill product is quite excellent country added, and one on the paper machine becomes suitable to avoid clogging and jamming. Combination of 25 g of tetramethylthiuram disulfide and 55 if it is in quantities depending on the operating conditions 25 g Tetraäthylthiuramdisulnd, dissolved in acetone, added from 0.01 to 1% to the pulp to be conveyed, is joined.

BeisDiel 5 ^ ⁶ 'additions ^of 0.15 to 1% are the resulting

products such as paper and pulp, especially

A combination of 60 ders can be stored well on 100 kg of paper stock, even if stored for a long time

25 g of tetramethylthiuram disulfide and 25 g of tetramethyl to show signs of aging,

thiurammonosulfid, dissolved in acetone, in the Hollander to B ¹ III

given and on the paper machine a combination eispi

of 100 g of tctra-5-chloro-7-bromo-8-oxycliinoliniumpyro- To 100 kg of cellulose, 0.06 kg of tetramethyl phosphate and 150 g of sodium tripolyphosphate, 65 thiuram disulfide, 0.24 kg of graham salt, 0.005 kg of propylene, dissolved in water, are incorporated. Oxydpolyglykoläther added and incorporated into the processing equipment (eg in the Hollander, Pulper, etc.). ^P The material is made into paper in the usual way.

A mixture of 20 g is added to 100 kg of wood pulp. As a result of the additives, it is fungicidal

K-Kurrolsalz, 9 g graham salt, 75 g tetramethylthiuram - 70 properties.

Example 12

100 kg of unbleached pulp are made in the processing plant 0.08 kg of tetramethylthiuram disulfide and 0.016 kg of a condensation product of oleic acid with Ethylene oxide (e.g. Emulphor A) added and incorporated.

The product obtained also has fungicidal properties.

Claims (2)

Patent claims: 1.Methods for combating congestion and blockages in pipe systems and equipment, primarily in the pulp, wood pulp, paper and cardboard industries, characterized by that the sludge to be conveyed or treated and pasty preparations compounds of the general formula n — c — s r, are added, in which R _x and R _{1 are} each an aliphatic, aromatic radical or two members of a common ring and R _{8 is} a metal, an amine, carbamate or the - S — C —N R ₄ -Rest and R ₄ and R _{5 are} the same radicals as R _x and R _a . 2. The method according to claim 1, characterized by the simultaneous presence of condensed Phosphoric acids and / or their salts. Considered publications: German Patent No. 740833; Austrian Patent No. 175,782; Swiss Patent No. 226 936; Belgian Patent No. 502946; Wochenblatt für Papierfabrikation, born in 1952, p. 748 (report on a work by Stocker); Chemisches Centralblatt, Jg. 1954, pp. 5655 to 5656 (report on a work by Andersen and
McKnight Jr.). © 609728 /% 12.51