摘要:
Use of physical vapor deposition methodologies to deposit nanoscale gold on activating support media makes the use of catalytically active gold dramatically easier and opens the door to significant improvements associated with developing, making, and using gold-based, catalytic systems. The present invention, therefore, relates to novel features, ingredients, and formulations of gold-based, heterogeneous catalyst systems generally comprising nanoscale gold deposited onto a nanoporous support.
摘要:
Use of physical vapor deposition methodologies to deposit nanoscale gold on activating support media makes the use of catalytically active gold dramatically easier and opens the door to significant improvements associated with developing, making, and using gold-based, catalytic systems. The present invention, therefore, relates to novel features, ingredients, and formulations of gold-based, heterogeneous catalyst systems generally comprising nanoscale gold deposited onto a nanoporous support.
摘要:
A process for producing sodium carbonate and other sodium-based chemicals from an aqueous solution containing sodium bicarbonate by contacting an aqueous solution of a bicarbonate-containing composition with a gas that is predominately other than carbon dioxide in an amount and for a time adequate to cause a sufficient amount of carbon dioxide to leave the aqueous solution to reduce the amount of bicarbonate ion in the solution by converting the bicarbonate to carbonate as carbon dioxide leaves the solution and thereafter converting the remaining solution to other sodium salts.
摘要:
A process for the dry carbonation of an alkali metal or ammonium carbonate, utilizing a low carbon dioxide-containing carbonating gas stream, and more particularly, a process for the production of a bicarbonate sorbent useful in the desulfurization of flue gases from the low carbon dioxide-content flue gases themselves.
摘要:
Soda ash is prepared from dry-mined nahcolite ore by partially calcining the ore, dissolving the ore in aqueous solution, separating the resultant solution from the ore insolubles, crystallizing anhydrous sodium carbonate or sodium carbonate monohydrate, and recovering the crystallized sodium carbonate.
摘要:
A process for recovery of alkali values from trona in which trona is dissolved, the sodium carbonate in the feed solution is converted to sodium bicarbonate by introducing carbon dioxide, sodium bicarbonate is crystallized and separated from a mother liquor, and sodium bicarbonate in the mother liquor is converted to sodium carbonate by introducing air to form a recirculating dissolving solution which is used to dissolve the trona.
摘要:
A process for producing anhydrous sodium carbonate by the pyrolysis of wet sodium bicarbonate, which comprises (a) a step of forming a complex salt selected from the group consisting of Na.sub.2 CO.sub.3.3NaHCO.sub.3 and Na.sub.2 CO.sub.3.NaHCO.sub.3.2H.sub.2 O by the pyrolysis of wet sodium bicarbonate under such temperature and pressure conditions that said complex salt is stable, and (b) a step of forming anhydrous sodium carbonate by the pyrolysis of said complex salt under such temperature and pressure conditions that the anhydrous sodium carbonate is stable.
摘要翻译:通过湿式碳酸氢钠的热解制备无水碳酸钠的方法,其包括(a)通过湿碳酸氢钠的热解形成由Na 2 CO 3·3H 2 CO 3和Na 2 CO 3·NaHCO 3·2H 2 O组成的组中形成的络盐的步骤 所述复合盐稳定的温度和压力条件,(b)在无水碳酸钠稳定的温度和压力条件下,通过所述络盐的热解形成无水碳酸钠的步骤。