CS271755B1 - Tanning agent containing aluminium's basic salts - Google Patents

Abstract

Possibility of its use is in plants producing mineral chemical agents, in tanneries and in basic fur industry. It solves the stabilization of combined chemical agent with aluminium salts by organic substances with hydroxyl groups on neighbouring carbons, for example polyols, saccharides. A cleaning chemical agent containing basic aluminium salts and containing eventually acidity binding substances in the amount of up to 10 % by weight in a dry matter of the product is characteristic by the fact that it contains a stabilizing agent of the following formula <IMAGE>, where n = 2 to 6 and where in two neighbouring carbons with a hydroxyl group the relative position of -OH groups is not relevant and where R1, R2 can be: -H, or COOH, or -CHO, -CO-CH2OH, -CmH2m-1O (saturated carbon strand with one keto group, -CmH2m-1 (saturated carbon strand), -CmH2m-1 (carbon strand with one double bond), where m = 1 to 6, in the amount of 0.2 to 3 mols to 1 mol of aluminium contained in the mixture.

Description

The present invention relates to a tanning composition comprising basified aluminum salts and a solution stabilizing basified aluminum salts.

The tanning aluminum compositions used hitherto are basified aluminum salts which tend to fall out of solutions, such as masking and complexing agents, to which organic mono-, d- and more carboxylic acids and hydroxy acids, such as formic, citric or gluconic acid, are added. , malonic, acetic, lactic, oxalic, phthalic or easily soluble salts of these acids. These substances are usually difficult to obtain or very expensive for these purposes. Some of these substances have, in addition to excellent stabilizing properties, a negative tanning ability when applied to the skin.

The above-mentioned disadvantages of the aluminum compositions used hitherto are eliminated by the tanning agent according to the invention containing basic aluminum salts with an optional content of gradually acidifying substances up to 10% by weight in the dry product, characterized in that it contains a stabilizing agent of the formula

CH

OH where n = 2-6 and wherein in two adjacent carbons with a hydroxyl group regardless of the relative position of the -OH group and R p R ₂ may be: -H, -COOH, -CO-CHgOH, -CHO, C _n) H _2Rn _ | 0 (saturated carbon chain with one keto group), -C _ni H _{2n + 1} (saturated carbon chain), "B _H2m _J (carbon chain with one double bond), where m = 1-6, in an amount 0.2 to 3 moles per 1 mol of aluminum contained in the mixture.

With such a composition, there is no risk of the aluminum compounds falling out of solution during preparation and application. Such a product can be spray dried, for example. The resulting powder is soluble without the risk of aluminum compounds falling out of the solution prepared thereafter.

The process according to the invention is illustrated by the following examples of use, which are given several of the many possible variants.

Example 1

The stirred and heated shafts were charged with 2,500 wt. parts of water, 500 wt. The mixture is stirred and heated to 80 ° C until the aluminum-ammonium alum has dissolved, then 320 wt. parts of glucose and basification is carried out by successive addition of 420 wt. parts of solid sodium bicarbonate (NaHCO 3) in the solid state, with stirring. The resulting product having a basicity of 30 ° Sch can be applied in a liquid state or in a powder after drying in a spray dryer.

The product contains 0.32 moles of stabilizer per mole of aluminum.

Example 2

2,000 wt. parts of water, 2 000 wt. of parts A1 ₂ (S 0 ^). 18 H ₂ O, the mixture is heated to about 60 to 80 ° C with stirring until the aluminum sulfate is dissolved. Then, 750 wt. parts of waste syrup from xyloza production (450 parts by weight of xyloose dry matter) and basification is carried out by gradual addition and mixing of 477 parts by weight of the mixture. parts of solid sodium carbonate. The resulting aluminum reagent having a basicity of 30 ° Sch can be used in a liquid state or spray dried.

The product contains 1 mole of stabilizer per mole of aluminum.

CS 271755 Bl

Example 3

The reaction stirred duplicator boiler is charged with 3,000 wt. parts of water. 2,500 wt. parts of Al ₂ (SO ₄ ) j. 18 H ₂ 0, the mixture was heated to 60-80 ° C and stirred until the aluminum sulphate was dissolved, then added to a solution of 375 wt. parts of xyloza waste syrup (225 parts by weight of xyloose dry matter) and basification is carried out by successive addition and stirring of 239 parts by weight. parts of sodium carbonate. The product is dried in a spray drier, dosed into a weighed stirred silo, where 88 wt. parts of the ground MgO pellets which are lost in the manufacture of cellulose. The silo content is mixed until the MgO is uniformly dispersed in the silo content. The resulting aluminum reagent, when applied, has a theoretical initial basicity of 20 ° Sch with a further self-basifying effect.

Example 4

A 1000 wt. 1000 parts by weight of water are added while stirring and heating to 60-80 ° C. The mixture is heated to complete dissolution of the alum ammonium alum, and the mixture is further agitated with 138 wt. parts of ethylene glycol. The solution thus obtained is dried in a spray drier, the resulting powder is metered into a stirred silo, where 70 wt. parts of MgO powder. The silo content is mixed to uniformly disperse the MgO in the silo content. A self-base clay agent is formed.

The composition contains 1 mole of stabilizer per mole of aluminum.

Claims (1)

A tanning agent containing basic aluminum salts with an optional acidity-gradually binding content of up to 10% by weight on the dry product, characterized in that it contains a stabilizing agent of the formula: CH • ^J η where n = 2 to 6 and where the two adjacent hydroxyl carbons do not depend on the relative position of the -OH groups and where Rp R2 may be: -H, -COOH, -CO-CH3OH, - CHO, Cff1H2m_ | O, i.e. a saturated carbon chain having one ketone group ^-C m ^H 2m + l 'i.e. saturated carbon chain ^_c mH2m-L' to 3 'chain with one double bond, wherein m = 1-6, in an amount of 0 2 to 3 moles per 1 mol of aluminum contained in the mixture.