SU1204568A1 - Method of clarifying titanium-containing sulfate solutions - Google Patents

Description

This invention relates to a process for the purification of titanium sulfate from slimes used in the manufacture of titanium dioxide.

The purpose of the invention is to increase the speed and degree of clarification of titanium-containing solutions obtained from ilmenite with varying degrees of change,

Example 1, 150 ml of titanium-containing sulphate solution, obtained by processing a mixture of ilme-. nitrate concentrates with content,%: TiOt 53.4; F eOV23, 4 is refined by clarification, for which a 0.5% aqueous solution of flocculant-aminomethyl-acrylamide copolymer of acrylamide with h-NOL-amine salt of acrylic acid in the amount of 50 g of flocculant per 1 m of solution is added to it. The solution is then placed in a graduated cylinder and kept in a thermostated condition at 60 ° C. The rate of sedimentation of particles in solution (L oc) is determined by determining the sedimentation rate of particles in the free fall zone on the sedimentation curve, obtained by plotting the dependence of sediment volume on time. The transparency of the clarified DP solution is evaluated further by the content of residual isham in 50 ml of mother liquor after over 20 minutes.

 Under these conditions, the cleaning solution occurs at a Uoc of 150 cm / h and P 0.52 g / l.

Example 2: The titanium-containing solution of Example 1 is purified, but when using an amino-methylated copolymer of acrylamides with sodium salt of maleic anhydride (f) of the general formula

Af -CH-CH- I; C-C C-ABOUT I I OMft ON

where AA is acrylamide with aminomethyl groups.

The process of settling the solution is carried out at Up (; 150 cm / h to P O.ZD g / l.

Flocul nt in example 1 (F1) corresponds to the structural formula

Table 1 presents the indicators of clarification of the titanium containing sulphate solutions of Example 1 with different amounts of the input filter.

Table 1

fifiK solution obtained from rutile quartz concentrate, containing,%: TiOi 45; Si Fe2.0e 3.4, when adding 200 g / m proposed from locally to it in an amount of 200 g / m, the indicators Uoc and P are for F 1100 cm / h and g / l and cm / h and 0.95 g / l, respectively.

As these data and the data of Table 1 show.

flocculants are quite different

for solutions obtained from ilme- nite and rutile quartz concentrate.

Table 2 shows the change

Acts F. and F. according to the invention for titanium-containing solutions obtained from ilmenite concentrates with varying degrees of variation.

Table 2

The effectiveness of the proposed flocculants increases for solutions obtained from ilmenite concentrates with an increase in the degree of their change (see Table 3).

Editor N.Kishtulinets

Compiled by L.Romantseva Tehred M.Nad

Order 8486/22 Circulation 461

VNIIPI USSR State Committee for Inventions and Discoveries 113035; Moscow, Zh-35, Raushsk nab., D.4 / 5

Branch ShSh Patent, Uzhgorod, Proektna St., 4

T a b l and c a 3

Reduction, 05% is not recommended due to the strong dilution of the working solution with floc solution

Pnta, an increase in C of 1.0% makes it difficult to dispense the latter.

The proposed method improves the clarification efficiency of titanium-containing solutions obtained by processing the modified titanium-containing raw material of a complex composition according to the degree of clarification of the solution while maintaining high rates of sludge deposition.

Proofreader And, Erdeyi

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Claims (2)

1. METHOD FOR LIGHTING TITANIUM-CONTAINING SULFURIC ACID SOLUTIONS, including settling the initial solution in the presence of an addition of an aqueous solution of a polymer flocculant, characterized in that, in order to increase the speed and degree of clarification of solutions obtained from ilmenites with varying degrees of change, aminomethyl is used as a polymer flocculant a copolymer of acrylamide with ethanolamine salt of acrylic acid or sodium salt of maleic anhydride. 2. The method according to claim 1, the only one is that the specified polymer flocculant is taken in an amount of 50-200 g per 1 ^{mg of a} titanium-containing solution in the form of 0.05-1.00% aqueous solution. SU „1204568