1. Molybden untuk dipakai dalam pembuatan alloy baja yang yang kuat sekali.
2. Untuk pembuatan pigment yang tahan temperatur tinggi.
3. Untuk berbagai katalisator (mempercepat reaksi)reaksi kimia pada
tewmperatur tinggi.
4. Banyak enzym2 (biokatalisator) mengandung molybden sebagai cofactor.
Cofactor adalah bahan inorganik. Ada yang tanpa itu enzyme tidak aktif.
Ada juga yang kalau ini ditambahkan, enzym nya jadi lebih aktif,
kecepatan reaksinya jadi lebih tinggi.
*Molybdenum* is a chemical element
<https://en.wikipedia.org/wiki/Chemical_element> with symbol *Mo* and atomic
number <https://en.wikipedia.org/wiki/Atomic_number> 42. The name is from
Neo-Latin <https://en.wikipedia.org/wiki/New_Latin> *molybdaenum*, from Ancient
Greek <https://en.wikipedia.org/wiki/Ancient_Greek> Μόλυβδος*molybdos*,
meaning lead <https://en.wikipedia.org/wiki/Lead>, since its ores were
confused with lead ores.[6]
<https://en.wikipedia.org/wiki/Molybdenum#cite_note-CRCdescription-6>
Molybdenum
minerals have been known throughout history, but the element was discovered
(in the sense of differentiating it as a new entity from the mineral salts
of other metals) in 1778 by Carl Wilhelm Scheele
<https://en.wikipedia.org/wiki/Carl_Wilhelm_Scheele>. The metal was first
isolated in 1781 by Peter Jacob Hjelm
<https://en.wikipedia.org/wiki/Peter_Jacob_Hjelm>.
Molybdenum does not occur naturally as a free metal
<https://en.wikipedia.org/wiki/Native_metal> on Earth; it is found only in
various oxidation states <https://en.wikipedia.org/wiki/Oxidation_state> in
minerals. The free element, a silvery metal
<https://en.wikipedia.org/wiki/Metal> with a gray cast, has the
sixth-highest
<https://en.wikipedia.org/wiki/List_of_elements_by_melting_point> melting
point <https://en.wikipedia.org/wiki/Melting_point> of any element. It
readily forms hard, stable carbides <https://en.wikipedia.org/wiki/Carbide>
in alloys <https://en.wikipedia.org/wiki/Alloy>, and for this reason most
of world production of the element (about 80%) is used in steel
<https://en.wikipedia.org/wiki/Steel> alloys, including high-strength
alloys and superalloys <https://en.wikipedia.org/wiki/Superalloy>.
Most molybdenum compounds have low solubility
<https://en.wikipedia.org/wiki/Solubility> in water, but when
molybdenum-bearing minerals contact oxygen
<https://en.wikipedia.org/wiki/Oxygen> and water, the resulting molybdate
<https://en.wikipedia.org/wiki/Molybdate> ion MoO2−
4 is quite soluble. Industrially, molybdenum compounds
<https://en.wikipedia.org/wiki/Chemical_compound> (about 14% of world
production of the element) are used in high-pressure
<https://en.wikipedia.org/wiki/High-pressure> and high-temperature
applications as pigments <https://en.wikipedia.org/wiki/Pigment> and
catalysts <https://en.wikipedia.org/wiki/Catalysis>.
Molybdenum-bearing enzymes
<https://en.wikipedia.org/wiki/Category:Molybdenum_enzymes> are by far the
most common bacterial catalysts for breaking the chemical bond
<https://en.wikipedia.org/wiki/Chemical_bond> in atmospheric molecular
nitrogen <https://en.wikipedia.org/wiki/Nitrogen> in the process of
biological nitrogen fixation
<https://en.wikipedia.org/wiki/Nitrogen_fixation>. At least 50 molybdenum
enzymes are now known in bacteria, plants, and animals, although only
bacterial and cyanobacterial enzymes are involved in nitrogen fixation.
These nitrogenases <https://en.wikipedia.org/wiki/Nitrogenase> contain
molybdenum in a form different from other molybdenum enzymes, which all
contain fully oxidized molybdenum in a molybdenum cofactor
<https://en.wikipedia.org/wiki/Molybdenum_cofactor>. These various
molybdenum cofactor enzymes are vital to the organisms, and molybdenum is an
essential element <https://en.wikipedia.org/wiki/Essential_element> for
life in all higher eukaryote <https://en.wikipedia.org/wiki/Eukaryote>
organisms,
though not in all bacteria.
2017-11-21 4:15 GMT+01:00 'Karma, I Nengah [PT. BI-POS]'
[email protected] [GELORA45] <[email protected]>:
>
>
> Kira-kira berapa defosit emas dan tembaga, aluminium dll di papua?
>
> Kalau ditambang kira-kira sampai berapa tahun?
>
> Apakah cadangan emasnya lebih besar dari tambang emas di afrika?
>
>
>
> *From:* [email protected] [mailto:[email protected]]
> *Sent:* Tuesday, November 21, 2017 11:01 AM
> *To:* Gelora 45 <[email protected]>
> *Subject:* [**EXTERNAL**] Re: [GELORA45] Demi Emas di Papua, CIA
> Gulingkan Sukarno dan Kennedy
>
>
>
>
>
> Seingat saya molibdenum digunakan untuk membuat paduan misalnya baja,
> untuk meningkatkan kekuatan, kekerasan, konduktivitas listrik dan ketahanan
> terhadap korosi dan keausan. Paduan 'moly steel' ini digunakan di beberapa
> bagian mesin.
>
> Sobat-sobat yang menguasai ilmu kimia dan metalurgi bisa menjelaskan lebih
> baik.
>
> Mengenai kuantitas tidak bisa saya sebutkan karena tidak dipublikasi
> berapa ton tembaga, emas, perak dan molybdenum. Pemerintah neo-Mojopahit
> juga tidak memberitahukan, tetapi dulu waktu saya bekerja pada perusahaan
> pelayaran dimana salah satu kapalnya dicharter untuk mengakut biji tembaga
> dari sana ke tempat smelter ada berita ditulis di majalah perusahaan tsb,
> kalau tak salah ingat dari 200.000 ton biji tembaga diperoleh kurang lebih
> 100.000 ton tembaga murni, 4 ton emas dan 2 ton perak. Angka-angka ini dari
> tahun 1970-an.
>
>
>
