(1945) Cytological reactions induced by inorganic salt solutions.

Transient nephrotoxic effects have been recorded after accidental ingestion of nickel salts.

Solid-state chemistry of nickel(II)-oxalate-amine systems

The evaluations are summarized below: ----------------------------------------------------------------------- Degree of evidence Overall for carcinogenicitya evaluation Human Animal ----------------------------------------------------------------------- Nickel and nickel compounds Nickel compounds 1 Nickel salts L Nickel sulfate S Combination of nickel oxides and sulfides encountered in the nickel refining industry S Nickel monoxides S Nickel trioxides I Nickel sulfide, amorphous I Nickel sulfides, crystalline S Nickel antimonide L Nickel arsenides L Nickel carbonyl L Nickel hydroxides S Nickelocene L Nickel selenides L Nickel telluride L Nickel titanate IMetallic nickel I S 2B Nickel alloys I L----------------------------------------------------------------------- a S : Sufficient evidence of carcinogenicity.

Black nickel oxide is chemically reactive and forms simple salts in the presence of acids.

Synthesis of nickel oxalate particles in the ..

1. The method of producing oxalate dihydrate cobalt (II), comprising preparing a reaction of an aqueous solution containing cobalt (II) and oxalate crystallization of the desired product from the solution, separating the precipitate from the solution and drying the precipitate, while for the preparation of the reaction of an aqueous solution as the source of cobalt (II) use of cobalt containing waste production, characterized in that as waste production use waste solution chemical coalitionary and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(from 0.9 to 4.5), and the pH value from 0.0 to 8.0.2. The method according to claim 1, characterized in that for the preparation of the reaction of an aqueous solution as a source of oxalate used at least one substance from the group consisting of oxalic acid, sodium oxalate, potassium oxalate, ammonium oxalate.3. The method according to claim 1, characterized in that for the preparation of the reaction of an aqueous solution as a source of oxalate using an aqueous solution containing at least one substance from the group consisting of oxalic acid, sodium oxalate, potassium oxalate, ammonium oxalate, with a mass fraction of the substance in the solution is from 5 to 50%.4. The method according to claim 1, characterized in that DL is making the reaction of an aqueous solution as a source of oxalate use waste production, containing at least one substance from the group consisting of oxalic acid, sodium oxalate, potassium oxalate, ammonium oxalate.5. The method according to claim 1, characterized in that the crystallization of the target product are carried out from a solution with a temperature of from 0 to 30°C.6. The method according to claim 1, characterized in that the crystallization of the target product are carried out from a solution with a temperature of from 70 to 105°C.7. The method according to any one of claims 1 to 6, characterized in that use exhaust the chemical solution coalitionary containing as the main components of cobalt (II), dimethylaminoborane, boric acid, acetic acid, sodium acetate, and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(from 0.9 to 4.5), and the pH value from 0.0 to 7.5.8. The method according to any one of claims 1 to 6, characterized in that use exhaust the chemical solution coalitionary containing as the main components of cobalt (II), dimethylaminoborane, boric acid, lactic acid, sodium citrate, and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(from 0.9 to 3.5), and the pH value from 0.0 to 6.5.9. The method according to any one of claims 1 to 6, characterized in that use exhaust the chemical solution coalitionary containing as the main components of cobalt (II), dimethylaminoborane, Bo is strong acid, malonic acid, sodium sulfate and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(from 0.9 to 4.0), and a pH value of from 0.0 to 8.0.10. The method according to any one of claims 1 to 6, characterized in that use exhaust the chemical solution coalitionary containing as the main components of cobalt (II), hydrazine, ammonia, and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(1,0-3,0), and pH value of from 1.0 to 7.5.11. The method according to any one of claims 1 to 6, characterized in that use exhaust the chemical solution coalitionary containing as the main components of cobalt (II), hypophosphite sodium, postit sodium, sodium citrate, ammonium chloride, ammonia, and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(1,0-2,9), and pH value of from 0.3 to 7.0.12. The method according to any one of claims 1 to 6, characterized in that use exhaust the chemical solution coalitionary containing as the main components of cobalt (II), hypophosphite sodium, postit sodium, aminouksusnoy acid, ammonia, and water in the reaction solution establish the molar ratio of cobalt (II)oxalate, equal to 1.0:(1,0-2,9), and pH value of from 0.3 to 6.5.

Contact hypersensitivity Nickel and its water-soluble salts are potent skin sensitizers.

Nickel oxalate particles were also synthesized in systems where confinement of space did not exist, such as the precipitation stripping (PS) technique and in homogenous solutions, under conditions similar as that in the ELM systems.

Inhalation is an important route of exposure to nickel and its salts in relation to health risks.


Synthesis of nickel oxalate/zeolitic ..

SUBSTANCE: invention relates to the improved method for preparing nickel oxalate that can be used in preparing catalysts, ceramic materials and in manufacturing electric vacuum devices. Method involves preparing the reaction solution containing nickel (II) and oxalate, crystallization of product, separation of precipitate from solution and its drying. The reaction solution is prepared by mixing reagent as source of oxalate and spent solution from chemical nickel plating taken in the amount providing the mole ratio in the reaction solution nickel (II) : oxalate = 1.0:(0.8-2.8). Spent solution of chemical nickel plating contains as main components nickel (II), ligand for nickel (II), reducing agent and product of its oxidation. As spent solution of chemical nickel plating method involves using solution containing nickel (II), ligand for nickel (II), hypophosphite, phosphite as main components and pH value in the reaction solution is brought about from 2.5 to 7.5. As spent solution of chemical nickel plating method involves using solution containing nickel (II) and ligand for nickel (II) as main components. As a reducing agent method involves using substance taken among the group including hydrazine, borohydride, hydrazine borane, alkylaminoborane, dithionite, hydroxymethyl sulfinate, thiourea dioxide, product of reducing agent oxidation and pH value in the reaction solution is brought about 0.0 to 8.5. Invention provides reducing material consumptions for preparing nickel oxalate, expanded assortment of materials used for preparing nickel oxalate, utilization of manufacture waste, reduced cost of product and simultaneous utilization of the spent solution of chemical nickel plating representing toxic waste of manufacturing.

Nickel(III) Oxalate Ni2(C2O4)3 Molecular Weight -- …

SUBSTANCE: invention relates to a method for preparing copper (II) acetate monohydrate that represents organic carboxylic acid salt. Copper (II) acetate monohydrate is prepared by crystallization from solution obtained by mixing acetic acid, alkaline metal acetates or ammonium with copper-containing spent solution used in etching printing boards. Method provides reducing cost of the proposed method for preparing copper (II) acetate monohydrate, retaining purity of product with simultaneous utilization of toxic waste in electronic engineering manufacture - the spent solution in etching printing boards. Also, invention provides reducing material consumptions in preparing copper (II) acetate monohydrate, expanding assortment of materials used for its preparing and utilization of toxic waste in electronic engineering manufacture. Product obtained by the proposed method can be used as pigment, fungicide and copper microfertilizer in agriculture, as catalyst in processes of polymerization, as a stabilizing agent of artificial fibers, for preparing galvanic solutions and preparing other copper compounds.