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    • 22. 发明授权
    • Process for purifying wet-processed phosphoric acid
    • 净化湿法磷酸的方法
    • US4596703A
    • 1986-06-24
    • US557111
    • 1983-12-01
    • Reinhard GradiGero HeymerGunther Schimmel
    • Reinhard GradiGero HeymerGunther Schimmel
    • C01B25/234C01B25/46C01B25/16C01B15/16C01B25/26
    • C01B25/461C01B25/462
    • The disclosure relates to a process for purifying crude, concentrated wet-processed phosphoric acid. To this end, the disclosure provides:(a) for the organic solvent to be mixed with the starting product in a ratio by volume of more than 4:1 to effect the extraction in a single process step--from the crude wet-processed phosphoric acid--of a quantity of phosphoric acid necessary for 40 to 70 weight % of the P.sub.2 O.sub.5 used to go into the organic phase, and for the resulting aqueous phosphoric acid raffinate to contain at most 28-32 weight % P.sub.2 O.sub.5, and for the organic phosphoric acid solution to be separated from the phosphoric acid raffinate;(b) for the separated organic phosphoric acid solution to be scrubbed with a quantity of scrubbing solution corresponding at most to 5% of the volume of the phosphoric acid solution; for the scrubbing solution to be recycled into stage (a), and for purified phosphoric acid and phosphate salt solution, respectively, to be recovered in known manner from the scrubbed phosphoric acid solution; and(c) for the aqueous phosphoric acid raffinate produced in stage (a), if desired after prior removal of residual solvent therefrom, to be directly utilized or subjected to known purifying treatment.
    • 本公开涉及纯化粗浓缩湿法磷酸的方法。 为此,本公开内容提供:(a)使有机溶剂与起始产物以体积比大于4:1的比例混合以在单一工艺步骤中进行萃取,从粗制湿法磷酸 酸为一定量的磷酸,用于进入有机相中的40〜70重量%的P2O5,所得到的磷酸提取液含有最多28-32重量%的P2O5,对于有机磷酸 酸性溶液与磷酸提余液分离; (b)对于待洗涤的分离的有机磷酸溶液,其量为相当于磷酸溶液体积的至多5%的洗涤溶液; 将洗涤溶液再循环到阶段(a)中,分别用纯化的磷酸和磷酸盐溶液从已洗涤的磷酸溶液中以已知方式回收; 和(c)如果需要,在步骤(a)中制备的磷酸残液水溶液中,在预先除去残余溶剂之后,直接使用或进行已知的纯化处理。
    • 29. 发明授权
    • Production of organophosphines
    • 生产有机膦
    • US4073810A
    • 1978-02-14
    • US549172
    • 1975-02-12
    • Klaus HestermannBernd LippsmeierGero Heymer
    • Klaus HestermannBernd LippsmeierGero Heymer
    • B01J21/00C07B61/00C07F9/50C07F9/53C07F9/54
    • C07F9/5086C07F9/54
    • Production of organophosphines of the general formula R.sub.n PH.sub.3-n, in which R stands for identical or different, substituted or unsubstituted alkyl, cycloalkyl or aralkyl groups having from 1 to 18 carbon atoms, preferably from 1 to 4 carbon atoms, more preferably from 1 to 2 carbon atoms, and n stands for a whole number within the range 1 and 3. The compounds are more particularly produced by continuously reacting hydrocarbon halides of the general formula RX, in which R has the meaning given hereinabove and X stands for halogen, especially for chlorine or bromine, with hydrogen phosphide, and primary or secondary organophosphines at temperatures within the range 100.degree. and 600.degree. C. and under pressures of up to 20 atmospheres in contact with a catalyst being placed in a reactor. Gaseous matter issuing from the reactor is cooled and the resulting organophosphonium halides (R.sub.n PH.sub.4-n)X are hydrolyzed in conventional manner to the corresponding organophosphines.
    • 制备通式RnPH3-n的有机膦,其中R代表相同或不同的取代或未取代的具有1至18个碳原子,优选1至4个碳原子的烷基,环烷基或芳烷基,更优选1至 2个碳原子,n表示1和3范围内的整数。化合物更特别地通过连续反应通式RX的卤代烃,其中R具有上文给出的含义,X代表卤素,特别是 对于氯或溴,与磷化氢以及初级或次级有机膦在100℃和600℃的温度范围内以及在与置于反应器中的催化剂接触的情况下在高达20个大气压的压力下进行。 将从反应器排出的气态物质冷却,并将所得的有机鏻卤化物(RnPH4-n)X以常规方式水解成相应的有机膦。