PL116925B2 - Method of manufacture of zeolite adsorbents,especially of foyazite group,in the form of spheroidal grains with diameters in the range from 0.4 up to 1.0 mmuppy fojazita,sfericheskojj formy diametrom ot 0,4 do 1,0 mm - Google Patents

Method of manufacture of zeolite adsorbents,especially of foyazite group,in the form of spheroidal grains with diameters in the range from 0.4 up to 1.0 mmuppy fojazita,sfericheskojj formy diametrom ot 0,4 do 1,0 mm Download PDF

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Publication number
PL116925B2
PL116925B2 PL21998379A PL21998379A PL116925B2 PL 116925 B2 PL116925 B2 PL 116925B2 PL 21998379 A PL21998379 A PL 21998379A PL 21998379 A PL21998379 A PL 21998379A PL 116925 B2 PL116925 B2 PL 116925B2
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Poland
Prior art keywords
zeolite
group
diameters
foyazite
sfericheskojj
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PL21998379A
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Polish (pl)
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PL219983A2 (en
Inventor
Anna Bazarnik
Roch Kazimierczuk
Miroslaw Milewski
Jozef Berak
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Inst Chemii Przemyslowej
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Priority to PL21998379A priority Critical patent/PL116925B2/en
Publication of PL219983A2 publication Critical patent/PL219983A2/xx
Publication of PL116925B2 publication Critical patent/PL116925B2/en

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  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Description

Opis patentowy opublikowano: 01.07.1982 116925 Int. Cl3.C01B 33/28 CZYTELNIA Ur«du Patentowego Twórcywynalazku: Anna Bazarnik, Roch Kazimierczuk, Miroslaw Milewski, Józef M.Berak Uprawniony z patentu tymczasowego: Instytut Chemii Przemyslowej, Warszawa (Polska) Sposób otrzymywania adsorbentów zeolitowych, zwlaszcza grupy fojazytu, w formie sferoidalnej o srednicach w przedziale od 0,4 do 1,0 mm Wynalazek dotyczy sposobu otrzymywania adsorbentów zeolitowych zwlaszcza grupy fojazytu w formie kuli o srednicy od 0,4 do 10 mm, które moga byc wykorzystywane w procesach operujacych zarówno zlozem stalym, w tym z symulacja ruchu zloza, np. do adsorpcyjnego rozdzialu mieszanin, korzystnie do rozdzialu izomerów ksylenu Metylobenzenu.W instalacjach rozdzialu izomerów ksylenu i etylobenzenu ksztalt ziarna adsorbenta ma istotny wplyw na czystosc i efektywnosc wydzielania p-ksylenu.Ksztalt adsorbenta musi zapewnic minimalne przestrzenie miedzyziarnowe w kolumnie i minimalne opoiy dla przeplywajacych mediów, zas maksymalne upakowanie w danej objetosci kolumny. Te wymagania spelnia adsorbent w ksztalcie kuli o srednicy od 0,4 do 1 mm. Znane dotychczas sposoby otrzymywania granulowanego zeolitu pozwalaja na uzyskanie ziarna w formie walców, prostopadloscianów ewentualnie granulatu zblizonego ksztaltem do kuli.Jeden ze sposobów polega na zarabianiu mieszaniny zeolitowo-bentonitowej z woda do uzyskania konsys¬ tencji plasteliny, a nastepnie przecieraniu przez wirujaca tarcze, o przeswicie oczek 1 mm co pozwala uzyskac ekstrudery o dlugosci 1-2 cm. które z kolei rozdrabnia sie i obtacza do uzyskania ksztaltu zblizonego do kuli.Znane sa tez sposoby otrzymywania zeolitów typu A i X w formie kuli polegajace na wprowadzeniu mieszaniny krzemianu sodu i glinianu sodu do warstwy oleju mineralnego o odpowiedniej gestosci. Utworzone w tej warstwie kule przechodza do nastepnej warstwy w której nastepuje krystalizacja i utwardzenie sie kul.Celem niniejszego wynalazku jest otrzymywanie adsorbentów zeolitowych zwlaszcza grupy fojazytu w for¬ mie kul o srednicach od 0,4 do 1 mm, wykorzystujac wlasnosci odwadniajace alkoholu butylowego. Sposób polega na zarabianiu mieszaniny zeolitu z lepiszczem, np. mieszaniny zeolitowo-bentonitowej, z woda do uzyska¬ nia konsystencji gestej smietany, która w formie kropel wprowadza sie do krazacego w obiegu zamknietym alkoholu butylowego, w którym nastepuje suszenie kul i który spelnia role srodka transportujacego wysuszone kule na sito umieszczone w obiegu.Kule z sita suszy sie na powietrzu, nastepnie w suszarce i kalcynuje w piecu w temperaturze zapewniajacej2 116925 odpowiednia wytrzymalosc mechaniczna adsorbenta. Zaleta tego sposobu jest wyeliminowanie klopotliwych operacji zageszczania, wytlaczania, rozdrabniania i obtaczania granulatu otrzymanego znanymi metodami.Przyklad I. Mieszanine 40 g zeolitu NaY i 10 g bentonitu „Zebiec" zarabia sie z 70 ml wody desty¬ lowanejr w homogeni/3toize a nastepnie wprowadza sie w formie kropel do butanolu osuszonego sitami 4A cyrkulujacego w obiegu zamknietym z umieszczonym wewnatrz sitem, na którym oddziela sie otrzymany zeolit.Osuszone w butanolu kule suszy sie 24 godziny na powietrzu, nastepnie 2 h w 110°C i kalcynuje 4 H w 650°C.Otrzymany adsorbent zeolitowy NaY w postaci kul, których srednice zawieraja sie w przedziale od. 0,4 do 1,0 mm posiada pojemnosc sorpcyjna i wytrzymalosc mechaniczna pozwalajaca na stosowanie go w instalacjach rozdzialu izomerów ksylenu. PLThe patent description was published: 01.07.1982 116925 Int. Cl3.C01B 33/28 READING ROOM Ur «du Patent Creators of the invention: Anna Bazarnik, Roch Kazimierczuk, Miroslaw Milewski, Józef M. Berak Authorized by a temporary patent: Institute of Industrial Chemistry, Warsaw (Poland) Method preparation of zeolite adsorbents, especially the fojazyt group, in a spheroidal form with diameters ranging from 0.4 to 1.0 mm. The invention relates to a method of obtaining zeolite adsorbents, especially the groups of fojazite in the form of a sphere with a diameter of 0.4 to 10 mm, which can be used in processes operating both with a solid bed, including simulation of the bed movement, e.g. for the adsorptive separation of mixtures, preferably for the separation of xylene isomers Methylbenzene. In the separation of xylene and ethylbenzene isomers, the grain shape of the adsorbent has a significant impact on the purity and efficiency of p-xylene separation. The shape of the adsorbent must ensure minimum intergranular spaces in the column and minimum binder for flowing media, while the maximum packing in a given volume of the column. These requirements are met by the adsorbent in the shape of a sphere with a diameter of 0.4 to 1 mm. The previously known methods of obtaining granular zeolite allow to obtain grain in the form of cylinders, cuboid or ball-like granules. One of the methods consists in making a zeolite-bentonite mixture with water to obtain the consistency of plasticine, and then rubbing it by a rotating disc with a clearance 1 mm mesh, which allows to obtain extruders 1-2 cm long. which, in turn, are crushed and rolled to a shape close to a sphere. There are also known methods of obtaining type A and X zeolites in the form of a ball by introducing a mixture of sodium silicate and sodium aluminate into the layer of mineral oil of appropriate density. The spheres formed in this layer pass to the next layer in which crystallization and hardening of the spheres takes place. The aim of the present invention is to obtain zeolite adsorbents, especially the groups of foyazite in the form of spheres with diameters from 0.4 to 1 mm, taking advantage of the drainage properties of butyl alcohol. The method consists in making a mixture of zeolite with a binder, e.g. a zeolite-bentonite mixture, with water to obtain the consistency of a thick cream, which in the form of drops is introduced into the circulating butyl alcohol in which the balls are dried and which acts as a liquid agent. transporting the dried balls onto a sieve placed in circulation. The sieve balls are dried in air, then in a dryer and calcined in a furnace at a temperature ensuring adequate mechanical strength of the adsorbent. The advantage of this method is the elimination of the troublesome operations of concentrating, extruding, crushing and rolling the granulate obtained by known methods. Example 1 A mixture of 40 g of NaY zeolite and 10 g of "Zebiec" bentonite is prepared with 70 ml of distilled water in homogeni / 3toize and then introduced in the form of droplets into butanol dried with 4A sieves circulating in a closed circuit with a sieve inside which separates the obtained zeolite. The balls dried in butanol are dried in air for 24 hours, then 2 h at 110 ° C and calcined for 4 hours at 650 ° C . The obtained zeolite NaY adsorbent in the form of spheres with diameters ranging from 0.4 to 1.0 mm has a sorption capacity and mechanical strength allowing it to be used in xylene isomer separation plants. PL

Claims (1)

1. Zastrzezenie patentowe Sposób otrzymywania adsorbentów zeolitowych zwlaszcza grupy fojazytu w formie sferoidalnej o sredni¬ cach w przedziale od 0,4 do 1,0 mm, znamienny tym, ze mieszanine zeolitu z lepisczem, korzystnie mieszanine zeolitowo-bentonitowa, zarabia sie z woda do uzyskania konsystencji gestej smietany i w formie kropel wprowadza sie do alkoholu butylowego, krazacego w ukladzie zamknietym z umieszczonym wewnatrz sitem, na którym adsorbent zeolitowy oddziela sie, a nastepnie suszy i kalcynuje w znany sposób. Prac. Poligraf. UP PRL. Nakkd 120 egz. Cero 100 2* PLClaim 1. A method of obtaining zeolite adsorbents, especially the fojazyt group in a spheroidal form with diameters ranging from 0.4 to 1.0 mm, characterized in that the mixture of zeolite with a binder, preferably a zeolite-bentonite mixture, is made with water to to obtain the consistency of thick cream and in the form of drops, it is introduced into butyl alcohol, circulating in a closed system with a sieve inside, on which the zeolite adsorbent is separated, and then dried and calcined in a known manner. Wash. Typographer. UP PRL. Nakkd 120 copies Cero 100 2 * PL
PL21998379A 1979-11-29 1979-11-29 Method of manufacture of zeolite adsorbents,especially of foyazite group,in the form of spheroidal grains with diameters in the range from 0.4 up to 1.0 mmuppy fojazita,sfericheskojj formy diametrom ot 0,4 do 1,0 mm PL116925B2 (en)

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PL21998379A PL116925B2 (en) 1979-11-29 1979-11-29 Method of manufacture of zeolite adsorbents,especially of foyazite group,in the form of spheroidal grains with diameters in the range from 0.4 up to 1.0 mmuppy fojazita,sfericheskojj formy diametrom ot 0,4 do 1,0 mm

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PL21998379A PL116925B2 (en) 1979-11-29 1979-11-29 Method of manufacture of zeolite adsorbents,especially of foyazite group,in the form of spheroidal grains with diameters in the range from 0.4 up to 1.0 mmuppy fojazita,sfericheskojj formy diametrom ot 0,4 do 1,0 mm

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PL116925B2 true PL116925B2 (en) 1981-07-31

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