7/23/2019 Penge Lan Tang An

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JURNAL 1 (BLEACHING)

Pengelantangan (bleaching)

Proses yang bertujuan untuk menghilangkan warna-warna yang disebabkan oleh karena adanya

pigmen-pigmen alam atau zat-zat lain, sehingga diperoleh bahan yang putih.

Zat-zat pengelantang:

1. Bersifat oksidator:- engandung khlor:

- !aporit "#a$#l%&- 'atrium hipokhlorit "'a$#l&- 'atrium khlorit "'a#l$%&

- (idak mengandung khlor:- )idrogen peroksida ")%$%&- 'atrium peroksida "'a%$%&- 'atrium perborat "'aB$*&- !alium bikromat ""!%#r%$+&- !alium permanganat "!n$&

%. Bersifat reduktor:

-ulfur dioksida ""$%&

- 'atrium sulfit ""'a%$*&- 'atrium bisulfit "'a)$*&- 'atrium hidrosulfit "'a%%$&

Pertanyaan.

1. elaskan tujuan proses pengelantangan/%. ebutkan zat-zat pengelantang yang bersifat oksidator dan mengandung khlor/*. ebutkan zat-zat pengelantang yang bersifat oksidator dan tidak mengandung khlor/. ebutkan zat-zat pengelantang yang bersifat reduktor/

awaban.

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