SU1706674A1 - Method of producing composed membranes - Google Patents

Abstract

This invention relates to a process for the preparation of composite membranes. The invention makes it possible to simplify the process of obtaining zzr zhonyi x composite membranes, improve their separation properties and expand their fields of application by using micro and ultrafiltration membranes of cellulose base and ether, as a porous material, or acrylic or monomer as a porous material. methacrylic acid, or NN-dimethylaminoethyl methacrylate, followed by treatment of the cellulose membrane successively with solutions of the iron salt (i) with a concentration of 0.12 and 0.13 mol / l and hydrogen peroxide 1.4-1.8 mol / l or: pc cToopOf-. containing iron salt () and hydrogen peroxide with a concentration of 0.04-0.06 and 0.2-0.4 mol / l, respectively, and then treated with a solution of acrylic or meta-acidic concentration of 0.3-1, 2 mol / l containing 0.003-0.006 mol / l of salt Freez, with NN-dimstilaminoethyl methacrylate / .atl or psor 0.3-1.2 mol / l containing O.SO3-0.006 mol / l salt Mora and 0.004-0.007 trimethacrylate triethanolam1 /, - table 4. Them

Description

The invention relates to methods for the preparation of coglozits / .on membranes based on "; - -, chesically modified cellulose and its derivatives n can be used in separation processes methods ;; micro, ultrafiltration and reverse osmosis.

The aim of the invention is to simplify the process of obtaining zar, Ј-nni composite membranes, improving their distribution of methods by adjusting the size and the amount of charge on the surface of the pores and and; -, resharpp. p sigirony areas of membrane processes.

About. Membranes and membranes. H-iHd iio; ir; u (H ° C, MolZO, - igCv} i :.-iOfi :. nf: t (CCTD (PP.-FTI / b GLNYYG b,

.- j J :: M. . og ,, o: 3in) opr-dolppg when using: s M 1I .r.-. T.iHf p Vi-jCKO1 /; I ;;: - w-1; it is of flow type, equipped with magnetic

interfered with / at a rotation speed of 500 op / min. Detention is determined by the formula

R (1) - 100%,

V.O

where Cf, Co is the concentration of the solute in the filtrate and the initial solution, respectively.

Productivity is characterized by a permeability constant calculated by the formulas 2

I - Av

ID

S A g A p

where LU is the volume of filtrate that has passed through a membrane with an area S in the arsm & at working pressure dr.

Kontstsmsts | what is the an1 / ug (; koliths are defined to ducturia,

 ABOUT

WITH

f.

i W

jV N

USSIKS AND IL.ULARSHEALS. IPG-: rFerOg; itric methods.

The process is about; .i;.: / and: 1. I am an Acetate of G. Slopped membranes (Table 1 and f.L.

Option 1 (gbl. 1, examples 1-4 and 15). Org.zots acetate acetate. ig; a vines membrane with an average hydragus G. and-eski .., with a pore radius of 3, and it has EYDZRHISH. OT in solution 1; c5P -; (: - 11 - ;;;; 5Sl with an impregnation of 0.12 mol / l i for 10 min at room temperature. Then the membrane is washed for 3 min in distilled here, e and incubated for 25 min in a solution of H; gO2 with a concentration of 1.4 and 1.5 mol / l at room temperature. vpe, after the membrane is washed in distilled type for L min.

Option 2 (table. 2, example 12). A sample of cellulose acetate membrane with a mean water-pore radius of 23.6 H.V is maintained for 20 minutes at room temperature and a solution of FeCIs H; .0 ;. with a component concentration of 0.06 v, 0.3 mol / l, respectively, after which the membrane is washed for 6 minutes with distilled soda.

The stage of the prior polymerization of acrylic monomerosis is preg t after the ori g, 1OP 1 membrane providing max- g ;: the elite rate of the nailed polymeeis- (g 5l.З).

PRI me R 1. /. Cellulose membrane with srg-dh / m hydraulic membrane with a pore size of 23.5 nm after an ax l and i. l about serp.T that 1 maintain (. 3. example 19) in 0,4 M szstg.ore and;: ryyy sour ibt. containing A mol / l Mora salt, for 30 s, after che; e membrane membrane G /. PS GI / LYRONAL WATER. By / / CHonna.ch

mesensrenz has an average hydraulic p a d l y of pore 15.5 n m, constant

the permeability is 1.17 10 m / g-G- s MPa with a gander canny g maglo o: at 99.8. Emuran O lucr.e inai on wooig.n: y 2 and treated with rasporom acrylic kslegg.1, in the analogue of 1 h-HL-IX services x gives the same pszu.you.

Example 1 .. Jatta. zolsch membrane with a related guide: RG Liegeg, p diuso - then 23.0 to them i: C .--; oxidation f option I

,,, - ,, -.-, ....,., - ,, „,. T -, -...-., 1 О4. gg, about 1

Li st. . -, :. L: J (h, C; J. 1. O,. P.... P -, - V O

rzeg: his ochrplo. : к,., о ;; -: о.К31ий 10 mol / l with the co-s of Mira, s (ec. p. JC p. po .; e ei d prom. c: from distributor a: g: i

I

NE And h; s rdldius pore 19.4 them,: ..; -: oriccr /, 1. ГЗЗ Ю 4 m3 / m2. with

m poly.: t: GL o-P, -.

.O NIL

acrylic acid, under similar conditions zet same results.

PRI me R 3. Ltsdsellulose membrane with an average hydraulic radius

pores of 5.0 nm after oxidation according to option 1 or 2 according to the described modes are maintained (Table 3. Example 10) with a 0.55 M solution of acrylic acid containing 5 x x mol / l of Mohr salt for 4 minutes,

after which the membrane is washed with distilled water. The resulting membrane has an average hydraulic pore radius of 3.3 nm and at a working pressure of 1.0 MeP, it has a productivity of 1.00-10 JMJ / M

-c with the retention of NaCI, Mazzoz, MgCto, determined by concentration of solutions. mol / l, 81.88 and 20%, respectively. PRI me R 4. Cellulose acetate membrane with medium hydraulic

with a pore radius of 5.0 nm after oxidation according to option 1 or 2, according to decommissioned regimes, they are kept (Table 3, example 36) in a 0.4 M solution of M.M-dimethylminomal methacrylate containing triethanolamine trimethacrylate and Mohr salt, the concentration of which is 0,014 and 0,004 mol / l, respectively, for 4 min, after which the membrane is washed with distilled water. The resulting membrane has an average hydraulic pore radius of 3, 2 nm and, with a working pressure of 1.0 MPa, has a capacity of 1.0 m /:.g-c during the retention of MaCl,.;. MgCl2. determined by solutions by concentration of 1 mol / l. 81.66 n 88% respectively.

The method allows to shorten the process time from 1.75 hours to 30 minutes (3.5 times); pe3vo reduce working pressure

with a low content of low-frost-free NYHR.ODS 1G-13 toO, 5-1.0 (LPa (16-36 times) np i an increase in membrane productivity a 20-35 times and preservation of the content). to regulate

the pore sizes of the membrane when changing the graft polymerization or monomer concentration and using initial porous materials with different pore size, which allows you to create

charged composite m mbrtny d /: n r.nu.po-and ult rg.uiltrats li and reverse use. In addition, the method allows for 3 ;; ar:; memera to -c g positive - iht ii negative surface

(tzbl. A).

Claims (1)

Invention Formula  HOiiy: COMPOS TSNON NG ..e; Designed by: 4 0 pmipopania ppl / nist porous cellulosic material of the polymer layer, including chemically initiated added polymer acrylic monomers in the processing of the material with a solution of iron, hydrogen peroxide and monomer, characterized in that. In order to simplify the process of obtaining charged composite membranes, improve their separation properties and expand their areas of application, cellulose-based micro- and ultrafiltration membranes are used as a porous material, acrylic or methacrylic acids or NN- are used as monomers. dimethylaminostilmethacrylate, the cellulose membrane is successively treated with a solution of salt of salt (II) concept option C. 12-- 0.13 mol / l and g.ex. of oxide with 1.4-1, about mol / l or solution containing salt iron (III) and hydrogen peroxide with a concentration of 0.04-0.06 and 0.2-0.4 mol / l, respectively, and then subjected to treatment with a solution of acrylic or methacrylic acid with a concentration of 0.3-1.2 mol / m. containing 0.003-0.006 mol / l of Mora salt, or a solution of M, M-dimethylsminoethyl methacrylate with a concentration of 0.3-1.2 mol / l, containing 0.003-0.005 mol / l of Mora salt and 0.004-0.007 mol / l of trimethacryltz trisanthanolamine. Note. The data were obtained using a scrambled membrane with an average hydraulic radius of 23.6 nm :: priming of acrylic acid for 5 min in a 0.6 mol / l monomer solution. Table 1 Note. The data were obtained using cellulose acetate membranes with an average hydraulic radius of 23.6 nm and an acrylic acid graft for 5 minutes in a 0.6 mol / L monomer solution. Table 2  the index of the value of z zderzhan l pokazisget. the solution of which thing sgee obtained the value: 1 - NaCl; 2 - N32804; 3 - MgCl2: 4 - polyethylene glycol with mpl.m. 15,000; 5 - hemoglobin; b - myoglsbin. 17 Characteristic I G us ten Low porosity cellophane Negative nosm ethical 16-18 . 2.73-10 GO-82 -7 170 o l 4 , 18 T and 0 l and c and 4 Way , yjPJ jy and 0 / G5-0,5 ten 2-6 ori th sky Micro and Ulgrafiltrative MeMs ne osmosis cellulose and all esters Negative, positive, mixed OOrctnosmotic n and °: sogogo daeg.en ultra- and microfilters 0.5-1.0 (0.6-1.0) 10 5 58-32