Abstract:
The present invention discloses a device for inductively suppressing acid mist from electrowinning. The device comprises a polar plate. A first isolation net and a second isolation net are respectively provided at two sides of the polar plate. Gaps are left between the first and second isolation nets and the two sides of the polar plate respectively. A first isolation piece and a second isolation piece are respectively provided to two sides of a top of the polar plate and are respectively located above the first and second isolation nets. The present invention also discloses a process for inductively suppressing acid mist from electrowinning by using the above device. The acid mist suppressing device and process of the present invention can prevent formation of acid mist during an electrowinning process so that pollution of acid mist can be eliminated and clean production can be realized.
Abstract:
This invention relates to a method for the preparation of lithium carbonate from lithium chloride containing brines. The method can include a silica removal step, capturing lithium chloride, recovering lithium chloride, supplying lithium chloride to an electrochemical cell and producing lithium hydroxide, contacting the lithium hydroxide with carbon dioxide to produce lithium carbonate.
Abstract:
Methods and systems of treating petroleum feedstock contaminated with naphthenic acids and sulfur are disclosed. The methods and systems include heating the petroleum feedstock to decompose the naphthenic acids, pressurizing to minimize the portion in the vapor phase, sweeping water vapor and carbon dioxide into a headspace with a non-oxidizing gas, removing water vapor and carbon dioxide from the headspace, reacting the sulfur with an alkali metal and a radical capping gas to convert the sulfur into alkali sulfides, and removing the alkali sulfides. Also disclosed is reacting the naphthenic acid with water and an oxide or hydroxide of an alkaline earth element to convert the naphthenic acid into naphthenates, removing water, ketonizing, removing oxides or carbonates, reacting the sulfur with an alkali metal and a radical capping gas to convert the sulfur into alkali sulfides, and removing the alkali sulfides.
Abstract:
Alkali metals and sulfur may be recovered from an oil desulfurization process which utilized alkali metal in an electrolytic process that utilizes an electrolytic cell having an alkali ion conductive membrane. An anolyte solution includes an alkali monosulfide, an alkali polysulfide, or a mixture thereof and a solvent that dissolves elemental sulfur. A catholyte includes molten alkali metal. Applying an electric current oxidizes sulfide and polysulfide in the anolyte compartment, causes alkali metal ions to pass through the alkali ion conductive membrane to the catholyte compartment, and reduces the alkali metal ions in the catholyte compartment. Liquid sulfur separates from the anolyte solution and may be recovered. The electrolytic cell is operated at a temperature where the formed alkali metal and sulfur are molten.
Abstract:
The electrolysis of cuprous chloride was carried out in the electrochemical cell. The particle size, current density, cathodic current efficiency, conversion of cuprous chloride and yield of copper formed depends strongly on current flow, heat transfer and mass transfer operation. The current flow, heat transfer and mass transfer are depends on surface area ratio of anode to cathode, distance between electrodes, concentration of HCl, applied voltage, flow rate of electrolyte, CuCl concentration and reaction temperature. The electrolysis of cuprous chloride as a part of Cu—Cl thermochemical cycle for hydrogen production is experimentally demonstrated in proof-of-concept work.
Abstract:
A room temperature method and electrode for producing sodium metal in situ is disclosed. The electrode has a sodium hydroxide, or another easily electrolyzible sodium containing material, solution on the anode side, a membrane which permits sodium ions to pass through to the cathode where the sodium ions are reduced to sodium metal. This sodium metal is then available to react with other components of the solution on the cathode side.
Abstract:
The invention relates to a transfer and insulation device (1) for electrically insulating electrodes, particularly anodes (2) and cathodes (3), used in the electrolytic cleaning of metals, from each other in an electrolytic tank (4), for distributing the electrodes as they are hanging in the electrolytic tank and for enabling the electrodes to be transferred, said transfer and insulation device (1) being made of one single piece.
Abstract:
An electrolysis system for generating a metal and molecular oxygen includes a container for receiving a metal oxide containing a metallic species to be extracted, a cathode positioned to contact a metal oxide housed within the container; an oxygen-ion-conducting membrane positioned to contact a metal oxide housed within the container; an anode in contact with the oxygen-ion-conducting membrane and spaced apart from a metal oxide housed within the container, said anode selected from the group consisting of liquid metal silver, oxygen stable electronic oxides, oxygen stable crucible cermets, and stabilized zirconia composites with oxygen stable electronic oxides.
Abstract:
A lithium ion conductor having the composition Li4nullxSi1nullxPxO4, where x is at least 0.3 and not more than 0.7, is prepared by shaping and calcining Li4nullxSi1nullxPxO4, where x is at least 0.3 and not more than 0.7, and/or compounds which are converted into this during calcination, wherein the Li4nullxSi1nullxPxO4 and/or the compounds is/are used in the form of powder having a mean particle size of not more than 5 microns.
Abstract translation:通过成形和煅烧Li4-xSi1-xPxO4,其中x为至少0.3且不大于0.7,制备具有组成Li 4-x Si 1-x P x O 4的锂离子导体,其中x为至少0.3且不大于0.7,以及 /或在煅烧期间转化为其的化合物,其中Li 4-x Si 1-x P x O 4和/或化合物以平均粒度不超过5微米的粉末形式使用。
Abstract:
An arrangement for spacing electrodes used in the electrowinning of copper includes two identical spacers which are designed to be mounted in an opening of an anode. Each spacer is elongated and has two ends which respectively face upward and downward during use. The upward facing end includes a confining surface which confronts a major surface of the anode on which the spacer is mounted and a sliding surface which faces away from the confining surface and has a slope. The confining surface and the sliding surface meet at a knife-edge which again faces upward during use. When the anode on which the spacer is mounted is immersed in an electrolytic bath and a cathode is lowered into a position adjacent to the anode, the knife-edge prevents the cathode from becoming caught on the spacer should the cathode be lowered onto the spacer. In addition, the sliding surface allows the cathode to slide towards its position. The two spacers have cooperating parts at their downward facing ends for locking the spacers to one another.