Methods of Utilizing Biomass Materials and Usage of Industrial Fuels
    6.
    发明申请
    Methods of Utilizing Biomass Materials and Usage of Industrial Fuels 审中-公开
    利用生物质材料的方法和工业燃料的使用

    公开(公告)号:US20090317319A1

    公开(公告)日:2009-12-24

    申请号:US12224318

    申请日:2007-02-15

    申请人: Caidong Qin

    发明人: Caidong Qin

    IPC分类号: C01B33/32 C01F11/06 C01B17/98

    摘要: The present invention provides methods of utilizing biomass materials, in which biomass materials are mixed directly with the reactants and the biomass materials while in combustion can directly heat up the reactants to the temperature required for the chemical reaction to take place. Such chemical reaction takes advantage of the heat energy, carbon element and/or silicon element that are inherently contained within biomass materials. For instance, biomass materials produce powdery or lumpy alkali metal silicates when chemically reacting with alkali metal compounds, synthesize black powder when reacting with nitrates, redox sulfates and decompose carbonates, etc. The present invention is characterized with high heat utilization, no need for external heat source, low power consumption, greatly reduced equipment costs, and the significantly simplified process.

    摘要翻译: 本发明提供利用生物质材料的方法,其中生物质材料在燃烧过程中直接与反应物和生物质材料混合,直接将反应物加热到化学反应所需的温度。 这种化学反应利用固有地包含在生物质材料内的热能,碳元素和/或硅元素。 例如,当与碱金属化合物发生化学反应时,生物质材料产生粉状或块状的碱金属硅酸盐,当与硝酸盐反应时合成黑色粉末,氧化还原硫酸盐和分解碳酸盐等。本发明的特征在于热利用率高,不需要外部 热源,低功耗,大大降低了设备成本,并大大简化了工艺流程。

    Process for treating phosphate rock

    公开(公告)号:US3560149A

    公开(公告)日:1971-02-02

    申请号:US3560149D

    申请日:1968-04-29

    申请人: CITIES SERVICE CO

    IPC分类号: C01B25/22 C01F11/04 C01B25/18

    摘要: PHOSPHORIS ACID CAN BE PREPARED FROM PHOSPHATE ROCK BY ACIDULATING THE ROCK FROM ABOUT 75-85% BY WIEGHT NITRIC ACID TO FORM AN ACIDULATE AND THEREAFDTER PRECIPITATING ANHYDROUS CALCIUM NITRATE BY RAISING THE NITRIC ACID CONTENT OF THE ACIDULATE. THE PRECIPITATED ANHYDROUS CALCIUM NITRATE CAN BE DECOMPOSED IN THE PRESENCE OF A NITROGEN OXIDE CONTAINING ATMOSPHERE AND THE PRODUCT GASES CAN BE USED TO FORM NITRIC ACID WHICH CAN BE RECYCLED TO THE ACIDULATION OR ANHYDROUS CALCIUM NITRATE PRECIPITATION STEPS. THE DECOMPOSITION GASES CAN ALSO BE RECYCLED DIRECTLY TO FORM NITRIC ACID IN SITU. BY DECOMPOSING THE PRECIPITATED CALCIUM NITRATE IN THE PRESENCE OF A NITROGEN OXIDE-CONTAINING ATMOSPHERE, A PRODUCT GAS STREAM CONTAINING A HIGH PROPORTION OF NITROGEN AND A RELATIVELY LOW PROPORTION OF UNDESIRED INERTS MAY BE OBATINED. THE CALCIUM NITRATE MAY BE DECOMPOSED IN THE PRESENCE OF A BED OF FLUIDIZED SOLIDS. THE BED MAY COMPRISE BY-PRODUCT LIME THAT IS HEATED AND RECYCLED TO THE DECOMPOSITION ZONE. A PORTION OF THE LPRODUCT GAS MAY BE RECYCLED TO THE DECOMPOSITION ZONE AT A BED FLUIDIZING VELOCITY. THE PRODUCT GASES, COMPRISING NITROGEN OXIDES AND OXYGEN, ARE PARTICULARLY SUITABLE FOR USE IN THE FORMATION OF CONCENTRATED NITRIC ACID. THIS ACID MAY CONVENIENTLY BE RECYCLED TO THE ACIDULATION OR ANHYDROUS CALCIUM NITRATE SEPARATION OPERATIONS. THE PRODUCT GASES MAY ALSO ADVANTAGEOUSLY BE RECYCLED DIRECTLY TO THE ACIDULATION MIXTURE SO AS TO FORM NITRIC ACID IN SITU.

    Processes for the production of citric acid

    公开(公告)号:US11897840B2

    公开(公告)日:2024-02-13

    申请号:US17590483

    申请日:2022-02-01

    发明人: Ethan Novek

    摘要: The present application pertains to methods for making metal oxides and/or citric acid. In one embodiment, the application pertains to a process for producing calcium oxide, magnesium oxide, or both from a material comprising calcium and magnesium. The process may include reacting a material comprising calcium carbonate and magnesium carbonate. Separating, concentrating, and calcining may lead to the production of oxides such as calcium oxide or magnesium oxide. In other embodiments the application pertains to methods for producing an alkaline-earth oxide and a carboxylic acid from an alkaline earth cation-carboxylic acid anion salt. Such processes may include, for example, reacting an alkaline-earth cation-carboxylic acid anion salt with aqueous sulfur dioxide to produce aqueous alkaline-earth-bisulfite and aqueous carboxylic acid solution. Other useful steps may include desorbing, separating, and/or calcining.

    Sodium Hydroxide Production with Carboxylic Acid and Sulfur Dioxide Intermediates

    公开(公告)号:US20230382841A1

    公开(公告)日:2023-11-30

    申请号:US18198664

    申请日:2023-05-17

    发明人: Ethan NOVEK

    摘要: The present application pertains to processes producing oxides using a weak acid intermediate. In one embodiment a material comprising calcium carbonate is reacted with a solution comprising aqueous carboxylic acid to form a gas comprising carbon dioxide and a solution comprising aqueous calcium carboxylate. The solution comprising aqueous calcium carboxylate is reacted with sodium sulfate to form a solution comprising aqueous sodium carboxylate and a solid comprising calcium sulfate. The solution comprising aqueous sodium carboxylate is reacted with sulfur dioxide to form sodium sulfite and an aqueous carboxylic acid. The sodium sulfite is separated from said aqueous carboxylic acid and reacted to form a solid comprising calcium sulfite which is decomposed to form calcium oxide and sulfur dioxide.