CLAUS PLANT PREPROCESSING SYSTEMS AND METHODS FOR REMOVAL OF AMMONIA FROM CLAUS PLANT FEED GASES
    3.
    发明申请
    CLAUS PLANT PREPROCESSING SYSTEMS AND METHODS FOR REMOVAL OF AMMONIA FROM CLAUS PLANT FEED GASES 有权
    植物生长因子植物预处理系统和从植物饲料气体中去除氨的方法

    公开(公告)号:US20150014590A1

    公开(公告)日:2015-01-15

    申请号:US14329725

    申请日:2014-07-11

    CPC classification number: C01B17/0408 C01B25/28

    Abstract: Systems and methods for pre-treatment of acid gas are presented in which ammonium is removed from the acid gas in an absorber that is operated at significantly elevated temperature using dilute phosphoric acid. While seemingly incompatible, absorbing ammonia at high heat in the absorber will allow for production of a diammonium phosphate product that is ultra-low in residual sulfurous compounds and prevent crystallization of phosphate salts due to the increased solubility of the salts in the hot diluted solvent.

    Abstract translation: 提出了用于预处理酸性气体的系统和方法,其中在使用稀磷酸在显着升高的温度下运行的吸收器中从酸性气体中除去铵。 虽然似乎不兼容,但是在吸收器中吸收高热量的氨将允许生产残留的亚硫酸化合物中超低的磷酸二铵产物,并且由于盐在热稀释溶剂中的溶解度增加而防止磷酸盐的结晶。

    Process for producing high purity phosphates
    6.
    发明申请
    Process for producing high purity phosphates 失效
    生产高纯度磷酸盐的方法

    公开(公告)号:US20060222581A1

    公开(公告)日:2006-10-05

    申请号:US11094518

    申请日:2005-03-31

    CPC classification number: C01B25/28 C01B25/30

    Abstract: Phosphate rock is reacted with phosphoric acid to produce monobasic calcium phosphate. Monobasic calcium phosphate is reacted with ammonium carbonate to produce ammonium phosphate. Dibasic calcium phosphate is also produced as a by-product when monobasic calcium phosphate reacting with ammonium carbonate. The dibasic calcium phosphate is reacted with sulfuric acid to produce phosphoric acid. The phosphoric acid is used to react with phosphate rock. Ammonium sulfate or ammonium hydroxide may be used instead of ammonium carbonate. Phosphate other than ammonium phosphate can be produced if calcium phosphate is reacted with a-y to produce x-phosphate, where x is lithium, sodium, ammonium or potassium and y is carbonate, hydroxide or sulfate.

    Abstract translation: 磷酸盐与磷酸反应生成磷酸二氢钙。 磷酸二氢钙与碳酸铵反应生成磷酸铵。 当磷酸二氢铵与碳酸铵反应时,磷酸二氢钙也作为副产物生产。 磷酸氢钙与硫酸反应生成磷酸。 磷酸用于与磷酸盐岩反应。 可以使用硫酸铵或氢氧化铵代替碳酸铵。 如果磷酸钙与a-y反应生成x-磷酸盐,其中x是锂,钠,铵或钾,y是碳酸盐,氢氧化物或硫酸盐,可以生产磷酸铵以外的磷酸盐。

    Water soluble caking inhibitors for ammonium phosphates
    7.
    发明授权
    Water soluble caking inhibitors for ammonium phosphates 失效
    磷酸铵的水溶性结块抑制剂

    公开(公告)号:US5595688A

    公开(公告)日:1997-01-21

    申请号:US469112

    申请日:1995-06-06

    CPC classification number: B01J2/30 C01B25/28 C05B19/00 C05G3/0088

    Abstract: There is disclosed a class of inhibitors for mono- and diammonium phosphates which are water soluble and effective at small concentrations rendering the phosphates acceptable in most utilities without separation of the inhibitor. The class of inhibitors are water soluble alkali metal phosphate salts selected from sodium tripolyphosphate, sodium potassium tripolyphosphate, sodium acid pyrophosphate, sodium pyrophosphate, sodium hexametaphosphate, trisodium phosphate, disodium phosphate and monosodium phosphate. Effective amounts of these salts range from about 0.025 percent to about 0.3 percent by weight in the ammonium phosphates. It is particularly advantageous that these salts are useful in both types of ammonium phosphates.

    Abstract translation: 公开了一类磷酸一铵和磷酸氢二铵的抑制剂,它们是水溶性的并且在小浓度下是有效的,使磷酸盐在多数情况下是可接受的,而不分离抑制剂。 一类抑制剂是选自三聚磷酸钠,三聚磷酸钠钠,焦磷酸钠,焦磷酸钠,六偏磷酸钠,磷酸三钠,磷酸二钠和磷酸一钠的水溶性碱金属磷酸盐。 在磷酸铵中,这些盐的有效量为约0.025%至约0.3%(重量)。 特别有利的是这些盐可用于两种类型的磷酸铵。

    Process of removing cationic impurities from wet process phosphoric acid
    8.
    发明授权
    Process of removing cationic impurities from wet process phosphoric acid 失效
    从湿法磷酸中除去阳离子杂质的方法

    公开(公告)号:US4639359A

    公开(公告)日:1987-01-27

    申请号:US809440

    申请日:1985-12-16

    CPC classification number: C01B25/237 C01B25/28

    Abstract: A method of removing aluminum, magnesium, iron and other impurities from wet process phosphoric acid is provided. The method comprises partially ammoniating the acid and reacting the acid with a fluoride ion donating compound to precipitate aluminum- and magnesium-containing ralstonite and ammonium fluorosilicate which can be easily separated from the acid thereby producing a partially ammoniated wet process phosphoric acid of reduced impurities content.

    Abstract translation: 提供了从湿法磷酸中除去铝,镁,铁和其他杂质的方法。 该方法包括部分氨化酸,并使酸与氟离子供体化合物反应,以沉淀含铝和镁的硅铝酸盐和氟硅酸铵,其可以容易地与酸分离,从而产生部分氨化的湿法磷酸,其杂质含量降低 。

    Recovery of phosphorus and aluminum from spent acid from the bright-dip
aluminum finishing process
    9.
    发明授权
    Recovery of phosphorus and aluminum from spent acid from the bright-dip aluminum finishing process 失效
    从光亮铝整理过程中,从废酸中回收磷和铝

    公开(公告)号:US4565680A

    公开(公告)日:1986-01-21

    申请号:US691326

    申请日:1985-01-14

    CPC classification number: C01B25/28 C01B25/36

    Abstract: In the process of the invention spent phosphoric acid is concentrated and stripped with air to a greater than 50% P.sub.2 O.sub.5 concentration to remove nitric acid. As a result of concentrating the spent acid a portion of the aluminum precipitates as monoaluminum phosphate, which is recovered by filtration. The filtrate is then ammoniated to produce a monoammonium phosphate solution. The solids precipitated during ammoniation and comprising aluminum ammonium phosphate which contains other metal phosphates are washed and reacted with aqueous ammonia to form diammonium phosphate.

    Abstract translation: 在本发明的方法中,将磷酸浓缩并用空气汽提至大于50%的P2O5浓度以除去硝酸。 通过将废酸浓缩一部分铝沉淀物作为通过过滤回收的单磷酸铝的结果。 然后将滤液氨化以产生磷酸二氢铵溶液。 在氨化过程中沉淀的固体含有磷酸铵铵,其中含有其它金属磷酸盐,并与氨水反应生成磷酸二铵。

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