SU569680A1 - Device for detecting irregularities in railroad track position - Google Patents

Description

I

The invention relates to bulk paper and paperboard sizing compositions and can be used in pulp and paper industry in the manufacture of various types of paper and paperboard that are not subject to high whiteness.

The urgent task is to find cheap substitutes for rosin, which is widely used for sizing paper and cardboard, as well as 1 paint industry, and has become a scarce material on the world market.

Attempts to replace the rosin completely with one bottoms IOT distillate cyital oil residue (tall oil pitch) in some paper and cardboard sizing compositions were not successful, because in the process of working the papermaking machine there are smoldering difficulties from falling out of the non-shed papermaking machine, paper machine grid ij.

Also known is the sizing composition for making paper, obtained by treating the bottom residue from the distillation of gall oil with maleic anhydride (at 230 ° C for 2 hours), followed by saponification of the modified product with a mixture of sodium hydroxide and sodium carbonate {H1 2.

However, such a composition does not provide paper with a satisfactory degree of sizing. In addition, this formulation is complex in its preparation method and is quite expensive.

The closest to the offer is also a composition containing, in wt.%: Paraffin32 - 47.7

VAT residue from the rectification of tall oil with a fatty acid content of at least 30% 47.7 - 62 Soda (caustic or calcined) 4.6-6 h. However, after a long continuous operation of the papermaking machine, for the production of paper with glue of known composition, precipitation from the glue occurs. e.

saponified veshesgv on the grid, the cloth, poses resinous difficulties.

It is explained by haem that fatty acid sweats of tall oil with carbon chain length C do not have sufficient protection for uncoupleted tall pitch substances. The aim of the invention is to eliminate resinous difficulties. This is achieved by TeNJ, that the composition for paper and cardboard sticking, including the bottom residue from tall oil rectification and soda, additionally contains mixynthetic fatty acids with 17-20 carbon atoms in the following ratio of components, wt.%: The bottom residue from tall oil rectification is 65- 85 A mixture of synthetic fatty acids 1 O - ZO Soda Else. The composition is prepared as follows. In a glue pot with a stirrer and obo- (direct or closed steam) aarpy

quantity of synthetic

zhu calculated

and tall oil pitch. C-C fatty acids, appropriately form; its amount of soda in the form of an aqueous solution of sodium hydroxide or sodium carbonate at the rate of obtaining a neutral glue or glue, with an insignificant content of free acids; boil glue with continuous stirring and heating. At the end of the cooking process, the glue is diluted with hot water directly in the cooking appliance, first to a concentration of 95-100 g / l, and then in a separate rye kosgi - with cold water to a working concentration of 2-OO g / l.

Example 1. For the preparation of the composition, the following are used: tall Pot of Kotlas UFJK with content, wt.%: Resin acids 9, unstable substances 4O, fatty acids 28, oxidized substances 16; synthetic fatty acids, satisfying the requirements of GOST 31492-72, with a saponification number of 180 mg CCP / g, and a 1O% aqueous solution of sodium hydroxide.

Glue of the following composition is prepared, wt.% Dry BeuiecTs: VAT residue from distillation of tall oil (tall pitch) 85, synthetic fatty acid SPL .1 C „- CIQ 10, sodium hydroxide NaOH 5.0.

The prepared adhesive with a working concentration of 30 g / l is stored for 7 days, after which there are no visible changes in the appearance of the adhesive emulsion and no precipitate forms. In addition to assessing the stability

emulsions, the resulting composition is checked for its ability to cause gum problems, i.e. fall out in the form of sticky sediments in the grid part, on presses of paper and glue consumption 30 (by weight of absolute dry aeuiecTBa) and technical aluminum sulphate 4% (by weight of absolutely dry fiber). From the prepared paper pulp, castings with a mass of 1OO g / m are made on a sheet-pouring apparatus and are tested according to well-known methods. The test results of glue and samples of paper glued by it are given in the table.

Example 2. Use the same components as Example 1. A composition containing wt.% Is prepared: tall oil pitch, 75, synthetic C-C 18.9 fatty acids

40 sodium hydroxide 6.1. Glue is prepared and tested as in Example 1. The results of the glue tests on the effectiveness of eliminating resin difficulties, as well as on the quality of glued paper, are given in the table.

45 Example 3. Components in the following quantity, wt. %: tall oil pitch 65.5, synthetic fatty acids C, - C 28.0, sodium hydroxide 6.5. The rest is similar to that of prtmer 1. The results of the testing of scientific research institutes are given in the table.

Example 4. The following composition is taken. Wt.%: Tall oil pitch 65, synthetic fatty acids 30, sodium hydroxide 5. The process is carried out analogously to example 1.

55 PRI me R, 5. Take wt.%: Tall oil pitch 85, fatty acids C - CgjjlO, sodium hydroxide 5. The process is carried out as in example 1.

Example 6. Buret control base of tav from one tall oil pitch, circulating dividing machine. The test is carried out according to a specially developed (verified by production experiments with a known contrasted composition) laboratory procedure, which is as follows. The glue is precipitated with aluminum sulfate solution, the precipitate is placed between the metal-specific construction plates at a pressure of 15 KG / CN and the precipitate is compressed (which corresponds to the maximum pressing pressure on the paper mill), then the separation force of the plates is determined. At the same time, it was established that the low value of the plate separation forces (within 2–0 t) indicates the ability of the adhesive to cause resin difficulties. To assess the quality of the caoiicTBaM glue, the paper glued by them is used to make paper pulp from 100% bleached sulphite pulp with a grinding degree of 35 ° SR,

its sodium hydroxide, wt.%: gall pitch 93.5, sodium hydroxide 6.5. The process is carried out analogously to example 1. The test results in the table.

Example 7 Gallium Lek and sodium carbonate are taken, and paraffin instead of synthetic fatty acids, i.e., the known composition is reproduced with a ratio of components, wt.%: Tall oil pitch 65.6,

paraffin 28, O, hydroxide ngsh 6.4. Consumption glue 2%, ammonium sulfate 3%. The glue and the paper it has glued are made and tested in Example 1. The test results are placed in the table.

Note: in all examples, a pitch containing,%: fatty acids 35, unstable -40, oxidized substances 16, resin acids 9, was used.

85

TALL OK

OO, O 150

SNCs KKCAOTU

5.0 G wagr

2, Tall Peck, 75

Cet hete scool rye ncflotu1v, in

Gi rookns load 6.1

3. Twilight lek65,5

Sintet chesh e zhngzhye kns opv2v, 0

G trosha wahr 6.5

4. TV pitch65

Svigegichmzhzhe fatty acids

Himprooxide WagP 5

5. Tallock pitch85

Skez get msh zh ry z soty1O

Mr. Thrush "mtri 5

6. Thallurry century

93.5 6.5

Mr Droppiu lgrp

Tall pet

65.5 2B Paraffin Karbokag Shatriv

6.4 From the table it can be seen that the proposed 155 composition in comparison with the known one allows to completely eliminate smolnye difficulties, and also slightly increase the degree of prokpeyk and mechanical indicators of the boom

gi

5200

350

53OO

O170

420

4.3

520

S5OO

About 2OO

4.5

515О

O150

340

4 2

5SO

2.0 19О

552О

4.5

2OO

4800

in, O 12O

3.9

15O

52SU

350

4.2

Claims (3)

1. Collector of works NIIIBa, No. 9, 1974, p. 25O-257. 2. Japanese patent number 26983, CP. 39 B, 1964. 3. Forward number 2016666, according to which a decision was made to issue an author's certificate, cl. D 21 H 3 / O4, 1975.