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ITS » PhD Theses » Program Doktoral Teknik Kimia
Posted by eny at 11/01/2010 16:49:29  •  3516 Views


SINTESA NATRIUM SIANAT DARI UREA DAN NATRIUM KARBONAT DENGAN PELARUT TRIKLOROBENZEN

SODIUM CYANATES SYNTHESES FROM UREA AND SODIUM CARBONATES USING TRICHLOROBENZENE AS A SOLVENT

Created by :
ISMAIL, TONTOWI 



SubjectNatrium karbonat
Alt. Subject Sodium carbonate
KeywordNatrium sianat
Natrium karbonat
Urea
Pelarut triklorobenzen
Reaktor batch
Shrinking core model

Description:

Eksperimen sintesa natrium sianat dari urea dan natrium karbonat menggunakan pelarut 1,2,4-triklorobenzen (TCB) telah dilangsungkan dalam reaktor batch yang dilengkapi pengaduk, jaket pemanas dan sistim pengeluaran gas. TCB dan natrium karbonat dipanaskan berurutan pada suhu 130 C diawal proses untuk mengeluarkan kandungan airnya, dilanjutkan penambahan sebagian dari kebutuhan urea sedikit demi sedikit. Suhu dinaikkan menjadi 140 C dan dipertahankan selama 1,5 jam sementara ini sisa urea juga ditambahkan. TCB dapat melarutkan urea namun tidak melarutkan natrium karbonat. Selanjutnya suhu reaksi divariasikan ke 140 sampai 200 C, pada tekanan atmosfer, waktu 2,5 jam. Dengan menggunakan rasio mol urea terhadap natrium karbonat 2/1 dan rasio berat TCB terhadap urea 5/1, pada suhu 200 C hasil natrium sianat yang didapat tertinggi adalah 93,4 % berat Yield pembentukan maksimum natrium sianat adalah 0,977 mol/mol urea dan 1,96 mol/mol natrium karbonat. Proses berlangsung dalan campuran yang heterogen, melibatkan perpindahan massa urea ke permukaan natrium karbonat. Produk natrium sianat yang padat diperkirakan tertumpuk dipermukaan partikel natrium karbonat yang belum bereaksi. Shrinking core model telah digunakan untuk membuat model simulasi sintesa natrium sianat ini. Hasil perhitungan model telah memberikan kecocokan dengan hasil eksperimen, sebagaimana ditunjukkan dalam kurva hasil eksperimen dan hasil perhitungan simulasinya.


Alt. Description

Experiment on sodium cyanates syntheses from urea and sodium carbonates using 1,2,4-trichlorobenzene (TCB) addition as a solvent has been conducted in a batch reactor which is equipped with mixer, heating jacket and exhausted gas system. TCB and natrium carbonates were dewatered at 130 C as an initial pretreatment, followed by additional urea gradually. Temperature was adjusted to 140C and the remaining urea was fed to the mixing system for 1,5 hours.Urea dissolved in TCB while sodium carbonates were not Then, temperature of reaction was varieted from 140 to 200 C and held for 2.5 hours under atmospheric conditions. Using moles ratio of urea to sodium carbonates of 2/1 and the mass ratio of TCB to urea of 5/1, at 200 C, the highest sodium cyanates content in product was 93.4% mass. Maximum yield sodium cyanates produced was 0,976 mol/mol urea and 1,96 mol/mol sodium carbonatest The process was carried out in a heterogeneous system, there was a mass transfer of dissolved urea to the surface of sodium carbonates particles. Solid product of sodium cyanates were accumulated on the surface of sodium carbonates particles. The shrinking core model was applied to the modeling of the syntheses process.The model calculations gave a good agreement with the experimental data.

Contributor:
  1. Prof.Ir. Renanto Handogo, Ms., PhD
    Dr.Ir. Mahfud, DEA
Date Create:11/01/2010
Type:Text
Format:pdf
Language:Indonesian
Identifier:ITS-PhD-3100007029478
Collection ID:3100007029478
Call Number:RDK 661.324 Ism s


Source :
PhD Theses, Chemical Engineering, RDK 661.324 Ism s, 2007

Coverage :
ITS Community Only

Rights :
Copyright @2007 by ITS Library. This publication is protected by copyright and permission should be obtained from the ITS Library prior to any prohibited reproduction, storage in a retrievel system, or transmission in any form or by any means, electronic, mechanical, photocopying, recording, or likewise. For information regarding permission(s), write to ITS Library.


Publication URL :
http://digilib.its.ac.id/sintesa-natrium-sianat-dari-urea-dan-natrium-karbonat-dengan-pelarut-triklorobenzen-7391.html




[ Free Download - Free for All ]

  1.  ITS-PhD-7391-2301301005-SINTESA NATRIUM SIANAT DARI UREA DAN NATRIUM KARBONAT DENGAN PELARUT TRIKLOROBENZEN.pdf - 27 KB
  2.  ITS-PhD-7391-2301301005-Pengesahan.pdf - 27 KB
  3.  ITS-PhD-7391-2301301005-Abstrak.pdf - 48 KB
  4.  ITS-PhD-7391-2301301005-Abstract.pdf - 44 KB
  5.  ITS-PhD-7391-2301301005-Kata pengantar.pdf - 70 KB
  6.  ITS-PhD-7391-2301301005-Daftar isi.pdf - 69 KB
  7.  ITS-PhD-7391-2301301005-Daftar gambar.pdf - 73 KB
  8.  ITS-PhD-7391-2301301005-Daftar tabel.pdf - 43 KB
  9.  ITS-PhD-7391-2301301005-Daftar notasi.pdf - 39 KB
  10.  ITS-PhD-7391-2301301005-Bab1.pdf - 172 KB
  11.  ITS-PhD-7391-2301301005-Kesimpulan.pdf - 58 KB
  12.  ITS-PhD-7391-2301301005-Daftar pustaka.pdf - 87 KB

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  1. ITS-PhD-7391-2301301005-Bab2.pdf - 527 KB
  2. ITS-PhD-7391-2301301005-Bab3.pdf - 183 KB
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  4. ITS-PhD-7391-2301301005-Lampiran.pdf - 1570 KB



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Natrium , Natrium karbonat , Natrium sianat , Pelarut , Pelarut triklorobenzen , Reaktor , Reaktor batch , Shrinking , Shrinking core model , Urea , batch , core , karbonat , model , sianat , triklorobenzen



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