SU657105A1 - Paper base for production of corrosion-proofing paper - Google Patents

Description

(54) BUIAGA BASIS FOR THE MANUFACTURE OF ANTI-CORROSION PAPER of an acidic nature, which may be contained in the atmosphere and serving as the main cause of metal corrosion. The aim of the invention is to reduce the degradation of the base paper and the permeability of aggressive gases at elevated temperatures. This goal is achieved by the fact that the known base for anticorrosive paper, consisting of cellulose and inhibitor, contains. As an inhibitor, a complex compound of the general formula: a (ttH4} gO XBAEjjOg-CPgOg / dH O, where a: B: c: d (0.4-o; 75l: 1: (1.20-1.25 ): (8-8, with the following ratio of components, Bes,% g Cellulose 75-39.9 Inhibitor 0.1-25 Compound; "(NH l O-bAe O cP OgdH O can be introduced directly into the pulp or applied on paper at 2 oC and pri 2.5–7.7 It can also be formed in the pulp or on the surface of paper at and pri 2.5–7 with a certain order of introduction of chemicals to the soluble aluminum salt, phosphorus compound, ammonium hydroxide. As soluble salt of agaomini de (NOa)., AetHgPO AS, (COOH) h, and orthophosphoric acid or ammonium phosphate is used as the phosphorus compound. Using a compound of the general formula G, {NH) O-BAAE dHjO as a base for anticorrosive paper, This effect is achieved due to the fact that starting at elevated temperature the specified soybean with decomposition of ammonia is decomposed with the absorption of heat. Ammonia released at elevated temperatures, neutralizes aggressive gases such as chlorine, sulfur dioxide, vapors of acids, and other chemicals of an acidic nature, which are the main cause of metal corrosion. By treating the substrate with elevated temperatures and penetration of aggressive gases, the use of this complex compound can ensure the tightness of the package of the protected product and prevent the loss of the inhibitor. It should also be noted that this compound has a protective effect on the metal, since ammonia and phosphoric acid compounds have a passivating effect on corrosion. Example. Unbleached sulphate pulp paper, pre-coated with latex, is treated in an impregnation bath with a 0.5% suspension of compound 1O, 4 (MH 2O-A & 2i, 2p, .C, then dried and used as a base paper for the inhibitor atmospheric corrosion. The content of the complex compound in paper is 0.1% by weight of absolutely dry fiber. Example 2: A paper made from unbleached sulphate pulp, coated with paraffin wax, treated with O, 3% suspension of the compound: 0.4 ( NH) g Р 2Ос and pri 3, then it is dried and used as cracker L of an atmospheric corrosion inhibitor. The content of the complex compound in paper is 4.6% .Tryth grade. Unbleached sulphate pulp is ground to 50 ° SR and treated with 10.6 g of AE (LC). Then 14.7 g is introduced at 20 ° C and 10% pacvBop of ammonia up to pri 5 is added to the resulting pulp. A silky compound of 0.4 is formed. i, 2 RjOj BHgO. The treatment with this compound is carried out for 30 minutes, then the resulting suspension is molded on liner equipment and paraffin coating is applied to the resulting paper. The base contains 25% of a compound of the general formula 0.4 (NH4 -), jO-Aa, jOj, 2P2Og-eH2O by weight of absolutely dry fiber. Table 1 shows the properties of the base, made in accordance with examples 1-3.

ha I

99

h o (in t

1L (Ti

Iiiiii

about

Iiiiii

yi

1st 00

I I I

I I

J

I I

I I I r

Uncoated papers containing various amounts of the compound have also been obtained (p. In accordance with Examples 4-7, and a test of a known base containing a latex and paraffin coating has been carried out.

EXAMPLE 4 Unbleached sulphate pulp paper is treated in an impregnation bath with a 1% suspension of a complex compound 0.4 (W14), -1.2P2058H20 at 20 and pd 2.5; then dried and used as a base paper for applying an inhibitor of atmospheric corrosion.

The content of the complex compound in paper is 1.5% by weight of absolutely dry fiber,

EXAMPLE 5 Unbleached sulphate pulp paper is treated in an impregnation bath with a 2% suspension of the compound 0.75 (MNI) O Ae330-1.25. P Oj-SH O at and pH 3, then dried and used as a base paper for applying an atmospheric corrosion inhibitor. The content of the complex compound in paper is 2.5% by weight of absolutely dry fiber.

EXAMPLE 6 Unbleached sulphate pulp is ground to 42 HRP and then treated with a suspension of the complex compound 0.4 (NH4L O-AeO3-1.25 at 20 ° C and pH 7 with a concentration of 10% in the mixture. at room temperature for 30 minutes, a base paper is formed on the grid of the paper machine,

The resulting base paper consists of 14.5 complex compounds and 85.5% cellulose.

.Primr7. Unbleached sulphate pulp is milled 40 and then treated with a suspension of the complex compound 0.4 (NH) O "AegOj-1, 2Pj6g-SH O at 20 ° C and pri 7 with its concentration in the mixture

20%. After processing continued at room temperature for 30 minutes, the base paper is cast onto the grid of the paper machine. .

The resulting base paper contains

25% complex and 75% cellulose.

From the data in Table 1, it follows that the greatest mass loss at elevated temperature is observed for paper that does not contain a coating and does not contain the compound ci {NH 1 o-bAe20j-cP20j-dH20,

When comparing the mass loss after heat treatment of a known base containing a coating of latex and paraffin and paper that does not contain latex ji3 and paraffin coating but contains compound a (rtjAEgOjCPgOg-dHgO. There is a significant difference. For paper containing a complex compound, the loss rate the masses are much smaller, which indicates a significant effect of this compound on the destruction process.

From the data of Table 1 it follows that the presence of the base and the coating and the indicated compound leads to a slight decrease in the mass loss, it is possible to analyze the effect of the presence in the base of the compound. –Cp Od – C 1 H 2 O on the permeability of the base to aggressive gases and the loss of the inhibitor after heat treatment. The proposed basis, in contrast to the known, is not permeable to aggressive gases. In addition, the proposed basis, compared to the known, has lower inhibitor loss at elevated temperatures.

Base papers containing the proposed complex compound, a phosphate volatile inhibitor, and a base without additives were tested under equal conditions.

Data from the test results. Are given in table 2.

Table 2

The performance of the base paper after its heat treatment at 120 s for 20 h

breaking length, m

number of double kinks

The strength of the base paper after treatment with water and after drying

1800

4100

700

100

Bursting length

number of double kinks

The strength of the base paper in the wet state,% of the initial strength of the dry sample

As follows from the data presented in Table 2, the introduction of the paper to the base of the proposed compound allows preserving the integrity of the base paper in various weather conditions and operating conditions.

The phosphate volatile inhibitor does not ensure the safety of the base paper and in its essence requires the use of not more paper, but a more inert carrier.

The high resistance of the base to degradation at elevated temperatures, the impermeability of aggressive gases, and the high retention of the inhibitor make it possible to make wide use of the proposed base in the production of anti-corrosion papers.

Claims (1)

1. Trukhtenkova N.E. Technologist packing booms. m. J 9 7 4, s, 197-198 „