62 results about "Citric Acid / tartaric acid" patented technology

A long-term stabilized aqueous initiator composition, which includes components for curing of a two-component mortar system composition. The long-term stabilized aqueous initiator composition includes an activator component that has an alkali and / or alkaline earth metal salt, an accelerator component that has a water-soluble alkali and / or alkaline earth metal salt, a retarder selected from citric acid, tartaric acid, lactic acid, salicylic, gluconic acid, and a mixture of these components, a mineral filler selected from a limestone filler, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture of these components, a thickening agent, and water.

The invention discloses a catalyst for producing MTBE (Methyl Tert-Butyl Ether) by virtue of C4 fractions in a refinery plant, and relates to the technical field of catalyst synthesis. A ZSM-5 zeolite molecular sieve serves as a carrier, platinum or nickel serves as an active ingredient, alumina, titanium dioxide, zinc oxide or zirconia serves as an adhesive, citric acid, tartaric acid, hydrochloric acid, oxalic acid, lactic acid or trichloroacetic acid serves as a competitive adsorbent, and the catalyst is prepared by an ultrasonic-microwave impregnation method. According to the catalyst, by the microporous structure of the ZSM-5 zeolite molecular sieve, the load ratio of the active ingredient can be increased, and the obtained catalyst has high selective catalytic performance; the ultrasonic-microwave impregnation method is used, so that the load ratio of the active ingredient can be increased, and time for preparing the catalyst is shortened.

The invention relates to the technical field of radioactive waste treatment, and provides an electrochemical decontamination electrolyte and a preparation method and application thereof. The electrochemical decontamination electrolyte is an aqueous solution, and solutes are prepared from phosphoric acid, oxalic acid, citric acid, tartaric acid, hydrogen peroxide and glacial acetic acid. Accordingto the electrochemical decontamination electrolyte and the preparation method and application thereof, the types of solutes of the electrochemical decontamination electrolyte are reasonably matched, and the dosage of the solutes is reasonably controlled, so that the electrochemical decontamination electrolyte which is good in decontamination effect, high in decontamination speed and capable of easily treating generated secondary waste liquid and residues is obtained; and the electrochemical decontamination electrolyte is suitable for overall or local electrochemical decontamination of radioactive contaminated waste stainless steel. In addition, in the electrochemical decontamination electrolyte, oxalic acid, citric acid, tartaric acid and glacial acetic acid are all organic acids and do not contain N and Cl ions, the electrochemical decontamination electrolyte is very beneficial to a glass solidification treatment system of decontamination waste liquid, and thus the generated waste liquid is easy to treat through the glass solidification system.

The invention relates to the technical field of mineral processing chemicals, in particular to a high-sulfur magnetite processing agent and an application method thereof. The high-sulfur magnetite processing agent is prepared by the following steps: using citric acid, tartaric acid, iron sulfide and water to prepare a mixed solution; using sodium diethyldithiocarbamate, sodium sulfide, ammonium dibutyl dithiophosphate and water to prepare a collecting agent liquid; and mixing the mixed solution and the collecting agent liquid according to a volume ratio of 1:(0.3-1.8) to form the high-sulfur magnetite processing agent. Therefore, activation of pyrrhotite is realized, separation between the pyrrhotite and magnetite is ensured, and the purpose of enhancing the desulfurization effect is achieved. The high-sulfur magnetite processing agent can be applied to desulfurization treatment of high-sulfur magnetites with different sulfur contents, and enables the sulfur content of iron concentrateafter flotation treatment to be reduced 0.15% or less, and the iron concentrate yield to be 91% or more.