Nickel sulfate|CAS10101-97-0

Nickel sulfate CAS No.10101-97-0, the molecular structure formula is NiSO4.6H2O, is one of the main raw materials for chemical nickel plating, the price is closely related to the price of metallic nickel. Nickel sulfate has a wide range of uses, it can be used as a catalyst to catalyze alkylation reaction, hydrogenation reaction, dehydrogenation reaction. It can improve the corrosion resistance, hardness and gloss of metal in chemical plating and electroplating. Nickel sulfate can be used as anode material for energy storage batteries, such as ternary anode material in lithium-ion batteries. It can be used in the manufacture of nickel-metal hydride batteries, nickel-cadmium batteries, nickel sulfate and so on.

Basic data

English name: Nickel sulfate

Molecular Formula: NiSO4.6H2O

CAS No.: 10101-97-0

H.S Code: 2833240000

EINECS No.: 231-111-4

Molecular weight: 262.84

Solubility: 65.0 g/100mL (20℃)

Melting point: 53°C

Physical and Chemical Properties: It is green monoclinic crystal. Loses six crystalline water when heated to 103℃. Soluble in water, aqueous solution is acidic; soluble in alcohol and ammonia.

Mechanism of nickel sulfate in chemical plating

The reaction process of chemical nickel plating is an autocatalytic redox process, and the reductants that can be applied in the plating solution are sodium hypophosphite, sodium borohydride, alkylamine borane and registers, etc. Among these reductants, sodium hypophosphite is the most important one. In these reductants to sodium hypophosphite used most, this is because of its cheap price, and the plating solution is easy to control, good corrosion resistance of the plated layer and other advantages. Chemical nickel plating solution in the main salt is nickel salt, generally used or nickel sulfate or nickel chloride, sometimes also used nickel sulfamate, nickel acetate and other inorganic salts. Early acidic nickel plating solution, nickel chloride, but nickel chloride will increase the stress of the plated layer, now most of the use of nickel sulfate. Currently there are patents that introduce the use of nickel hypophosphite as a source of nickel and hypophosphite, an advantage is to avoid the presence of sulfate ions, and at the same time in the replenishment of nickel salts, can make the accumulation of alkali metal ions to reach the minimum value. However, a problem exists in that the solubility of nickel hypophosphite is limited to only 35 g/L at saturation.The preparation of nickel hypophosphite is also a problem and is expensive. If the preparation method of nickel hypophosphite is mature and the solubility problem can be solved, this nickel salt will have a good prospect.

Production method

1、Nickel metal preparation: dissolve nickel metal with sulfuric acid, crystallize to get crude nickel sulfate crystals, dissolve the crystals, remove impurities and then concentrate to get battery grade nickel sulfate crystals. Add water in the reactor, then add sulfuric acid to formulate 30°Bé, then add nickel metal, and add nitric acid for reaction in several times. Reaction concentration reaches 48 ~ 50 ° Bé for crystallization, filtration, water to wash the crude crystals and add water to dissolve into 30 ° Bé, then add barium carbonate to neutralize the free acid, and then add hydrogen peroxide to oxidize the divalent iron and hydrolysis, purification of the solution after clarification, add a small amount of sulfuric acid to adjust the pH 3 ~ 4, and then concentrate the crystals, centrifugal dewatering, to produce nickel sulfate.

3Ni+8HNO3→3Ni(NO3)2+2NO↑+4H2O

Ni(NO3)2+H2SO4→NiSO4+2HNO3

2、Impurity nickel contained in copper electrolysis is dissolved into nickel sulfate in the anode, and after removing impurities and concentrating, battery-grade nickel sulfate crystals are obtained.

3、Nickel oxide, nickel hydroxide and nickel carbonate and other nickel intermediates are dissolved in sulfuric acid.

4、It is made from nickel-containing solution in cobalt production.

5、Prepared from nickel-containing waste.

Specification

Content (as Ni) ≥22.0%

Cl≤0.1%

NH4≤0.03%

Al≤0.003%

Ca≤0.02%

Fe≤0.002%

Co≤0.2%

Cu≤0.002%

Zn≤0.003%

Pb≤0.001%

Water Insoluble Matter≤0.03%

Uses

1, used in electroplating industry, is the main nickel salt of electroplating nickel and chemical nickel, is also the source of nickel metal ions, can dissociate nickel ions and sulfate ions in the electroplating process.

2, printing and dyeing industry for the production of phthalocyanine blue complexing agent and reducing dyes mordant.

3, the pharmaceutical industry for the production of vitamin C oxidation reaction catalyst.

4, It is the catalyst for hydrogenation of fats and oils in the production of hardened oil.

5, used in inorganic industry for the production of other nickel salts such as: nickel sulfate salt, nickel oxide, nickel hydroxide, nickel carbonate and so on.

6, used in battery industry, nickel sulfate can be used to make spherical nickel hydroxide, the latter is nickel-metal hydride, nickel-cadmium secondary batteries anode material is an important raw material; used in the preparation of nickel-cobalt hydroxide (referred to as NC), the market contains 60% nickel, 5% cobalt, containing hydroxide 35% of the NC products; used in the preparation of nickel-cobalt-aluminum hydroxide (referred to as NCA), the representative of the products for the Japan Panasonic for the Tesla to nickel-cobalt alumina as the main material of the anode, the main material of lithium aluminate. NCA is an important part of Tesla's battery cathode materials; for the preparation of nickel-cobalt-manganese hydroxide, commonly known as ternary precursor (NCM), representative models include NCM-523, NCM-622, NCM-811 and so on, NCM-811, etc. The numbers 523, 622 and 811 represent the proportion of nickel, cobalt and manganese elements respectively.

Nickel Sulfate Hexahydrate has a wide range of specifications, mainly industrial grade, electroplating grade, electronic grade, battery grade, chemically pure grade and so on. The price of nickel sulfate has a great relationship with nickel price, corresponding manufacturers, brands and specification grade.