Review A Clean Production Process Of Chromic Oxide

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PDF A Clean Production Process of Chromic Oxide

capability of 2,000 tons of chromic oxide has been built in China. The comparison of the industrial operation results of the clean process with those of the tradition process was given in Table 3 (Zhang, 2005). The clean process has exhibited promising results for the industrial production of chromic oxide. Table 3.(1)

Development of a new cleaner production process for producing chromic …

A demonstration plant featuring this process, as well as an Eco-Industrial Park (EIP) has been built in He’nan Province, PR China. The new cleaner process is a promising advancement for the industrial production of chromic oxide (Cr 2 O 3) as well as other chromium compounds such as potassium chromate (K 2 CrO 4) and potassium dichromate (K 2 …(2)

A Clean Production Process of Chromic Oxide – AIChE

In the production line, the industrial yield of chromium can be achieved as high as an average of 98.5% and the production cost of chromic oxide can be decreased by 17.1% when compared to the traditional production process. The clean process has exhibited a promising prospect in the industrial production of chromic oxide.(3)

Development of a new cleaner production process for producing chromic …

The new cleaner process is a promising advancement for the industrial production of chromic oxide (Cr2O3) as well as other chromium compounds such as potassium chromate (K2CrO4) and potassium …(4)

Chromium Oxide (Cr2O3): Properties, Production, Uses and … – Collegedunia

Apr 5, 2022Chromium Oxide (Cr 2 O 3) Production. The first transparent hydrated form of Chromium (+3) was prepared and made by the Parisians Pannetier and Binet in 1838. It has a secret process that is being manufactured from Chromite (Fe, Mg) Cr 2 O 4 which is used to produce Chromium (III) Oxide. Chromite was found in the mines of southern Africa, Asia, Turkey, and Cuba.(5)

CN102030370A – Clean preparation method of high loose density chromic …

The invention discloses a clean method for preparing high loose density chromic oxide. The method comprises the following steps: causing chromic salts which is used as raw materials to react with reducing gas which is used as a reducing agent at 300-800 DEG C for 0.5-5 hours, cooling, washing the reaction mixture with water, filtering and drying, thus obtaining an intermediate product …(6)

US4296076A – Chromic oxide production – Google Patents

Chromic oxide of very low (below 40 ppm) insoluble sulphur content is obtained by calcination of a less pure product at a temperature above 1100° C. for at least 10 minutes. US4296076A – Chromic oxide production – Google Patents Chromic oxide production Download PDF Info Publication number US4296076A. US4296076A …(7)

Novel Method for Producing Chromic Oxide without … – SpringerLink

Sep 8, 2021The chromic oxide made from the chromium sulfate solution is of high quality (up to 99.3%). The chromium exists as Cr(III) throughout the process; hence pollution from hexavalent chromium is avoided, achieving an environmentally friendly method for the production of chromic oxide.(8)

Chromic oxide – CAMEO

May 29, 2022A dull, olive-green color pigment that occurs naturally as the mineral eskolaite. A process for synthetically producing anhydrous, opaque chrome oxide green was developed in 1809 by Vauquelin. The colorant was listed as an artists pigment in the 1840 Winsor and Newton catalog (Newman 1997). It is opaque, lightfast, and durable with excellent …(9)

Green manufacturing process of chromium compounds

In the traditional process, three problems are highly distinguishable. The first is the environmental pollution. During production of one ton of chromium anhydride (CrO 3) product, the chromate production plant has to discharge approximately 2.5 to 3.0 tons of toxic chromium-containing residues that are difficult to be detoxified and comprehensively used because of their high content of …(10)

Development of a new cleaner production process for producing chromic …

Chromic oxide (Cr2O3) is an important chemical with numerous industrial applications. The traditional process used for manufacturing chromic oxide from chromite ore has low resources and energy efficiency. Moreover, large quantities of chromium-containing toxic solid wastes are discharged, posing serious pollution concerns. To reduce the environmental impact of this procedure, a new cleaner …(11)

Cleaner Production of Chromium Oxide from Low Fe(II)-Chromite

Sulfuric acid-based leaching is a promising cleaner method to produce chromium salts, but its feasibility for treating low Fe(II)-chromite still remains to be proven. A Box–Behnken design (BBD)-based set of experiments for sulfuric acid leaching of low Fe(II)-chromite was utilized in this work for generating an experimental dataset for revealing the functional relationships between the …(12)

Cleaner Production of Chromium Oxide from Low Fe(II)-Chromite

Sulfuric acid-based leaching is a promising cleaner method to produce chromium salts, but its feasibility for treating low Fe(II)-chromite still remains to be proven. A Box–Behnken design (BBD)-based set of experiments for sulfuric acid leaching of low Fe(II)-chromite was utilized in this work for generating an experimental dataset for revealing the functional relationships between the …(13)

A green process to prepare chromic oxide green pigment.

The results revealed that lower hydrogen reduction temperature, suitable addition of Al and Ba, were beneficial to obtaining the high quality chromic oxide green pigment. A hydrogen reduction and activated sintering process was proposed to prepare chromic oxide green pigment. Through ICP, XRD, SEM, FT-IR, UV, and CIE-L*a*b* colorimetric analysis, key factors and mechanism that influenced …(14)

A green process to prepare chromic oxide green pigment

A hydrogen reduction and activated sintering process was proposed to prepare chromic oxide green pigment. Through ICP, XRD, SEM, FT-IR, UV, and CIE-L*a*b* colorimetric analysis, key factors and mechanism that influenced preparation of chromic oxide green pigment were studied. The results revealed th …(15)

Metals Production and Metal Oxides Reduction Using Hydrogen: A Review

Jan 12, 2022Hydrogen is projected to be not only a source of clean fuel energy, but also a reducing agent for metals production in the current industrial decarbonization effort. Currently, hydrogen is still not common to be used in many metals production. Hydrogen is only commercially utilized in a limited number of refractory metals (i.e., W, Mo) and partly utilized in Ni and Co metals production(16)

chromium processing | Britannica

chromium processing, preparation of the ore for use in various products. Chromium (Cr) is a brilliant, hard, refractory metal that melts at 1,857 °C (3,375 °F) and boils at 2,672 °C (4,842 °F). In the pure state it is resistant to ordinary corrosion, resulting in its application as an electroplated protective coating for other metals. It dissolves in nonoxidizing mineral acids but not in …(17)

Process for production of chromic oxide – Patent US-2574065-A – PubChem

US-2574065-A chemical patent summary.(18)

Efficient Process for the Production of Cr2O3 from Chromite Ore

Dec 6, 2021The pressurized leaching process set forth in the paper produced an undiluted leaching solution. This was conducive to the precipitation of BrCO 4 using a Ba (OH) 2 transformation process. Chromium separation efficiency was 98%. At a reaction temperature of 80 o C, the chromium conversion efficiency was 96%. The reaction time for conversion was …(19)

A Green Process to Prepare Chromic Oxide Green Pigment

【Abstract】 <正>An hydrogen reduction and activated sintering method was proposed to prepare chromic oxide green pigment.Based on the green metallurgical process for chromite ore,clean production and value increment from chromite ore to chromic oxide green pigment were realized.Through XRD,(20)

Excerpt Links

(1). PDF A Clean Production Process of Chromic Oxide
(2). Development of a new cleaner production process for producing chromic …
(3). A Clean Production Process of Chromic Oxide – AIChE
(4). Development of a new cleaner production process for producing chromic …
(5). Chromium Oxide (Cr2O3): Properties, Production, Uses and … – Collegedunia
(6). CN102030370A – Clean preparation method of high loose density chromic …
(7). US4296076A – Chromic oxide production – Google Patents
(8). Novel Method for Producing Chromic Oxide without … – SpringerLink
(9). Chromic oxide – CAMEO
(10). Green manufacturing process of chromium compounds
(11). Development of a new cleaner production process for producing chromic …
(12). Cleaner Production of Chromium Oxide from Low Fe(II)-Chromite
(13). Cleaner Production of Chromium Oxide from Low Fe(II)-Chromite
(14). A green process to prepare chromic oxide green pigment.
(15). A green process to prepare chromic oxide green pigment
(16). Metals Production and Metal Oxides Reduction Using Hydrogen: A Review
(17). chromium processing | Britannica
(18). Process for production of chromic oxide – Patent US-2574065-A – PubChem
(19). Efficient Process for the Production of Cr2O3 from Chromite Ore
(20). A Green Process to Prepare Chromic Oxide Green Pigment

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