N₂₃₅ÝÍ·°»úÀíµÄÑо¿

À´Ô´ÆÚ¿¯£ºÖÐÄÏ´óѧѧ±¨(×ÔÈ»¿Æѧ°æ)1980ÄêµÚ2ÆÚ

ÂÛÎÄ×÷Õߣº³Â³¬Çò ¾­ÌÄÐù ÂÞÉùÇó ÕÅÏé÷ë

ÎÄÕÂÒ³Â룺20 - 26

¹Ø¼ü´Ê£º·°ËáÄÆ£¬ÝÍÈ¡·´Ó¦£¬ÇøÓòͼ£¬ÝÍ·°»úÀí£¬±¥ºÍ·¨£¬µÈĦ¶ûϵÁз¨£¬ÝͺϱÈ

Õª    Òª£º±¾ÎÄÑо¿ÁËÓÃN₂₃₅µÄúÓÍÈÜÒº£¨°´Ìå»ý¼Æ,¼ÓÓÐ×÷ΪÖúÈܼÁµÄÖÙÐÁ´¼20%£©ÔÚÑÎËáÌåϵÖдӷ°ËáÄÆË®ÈÜÒºÝÍ·°µÄ»úÀí¡£ÔÚ35¡À1¡æºãÎÂÏÂ,Óñ¥ºÍ·¨¼°µÈĦ¶ûϵÁз¨²âµÃ,µ±Ë®ÏàƽºâpH·Ö±ðΪ2.7¡«3.3ºÍ3.9¡«4.0Ö®¼äʱ,N₂₃₅ÝÍ·°µÄÝͺϱȣ¨·°¡Ã°·,Ħ¶û±È£©·Ö±ðΪ2.5ºÍ2.0;Ë®ÏàƽºâpHÔÚ3.5¡«3.8Ö®¼äʱ,ÝͺϱÈÔÚ2.0¡«2.5Ö®¼ä¡£ÔÚ35¡À1¡æºãÎÂÏÂ,ÓÃбÂÊ·¨²âµÃ,ÔÚ±¾Îı¨µ¼µÄʵÑéÌõ¼þÏÂ,N₂₃₅µÄÑÎËáÑÎÔÚÓлúÏàÖеÄƽ¾ùµÞºÏ¶ÈΪ1.5¡£Òò´Ë,¶ÔÓ¦ÓÚÝͺϱÈΪ2.5ºÍ2.0µÄÝÍÈ¡·´Ó¦·½³Ìʽ¿ÉÄÜÓ¦·Ö±ðΪ3HV₁₀O_28£¨a£©^5-+10£¨R₃NHCl£©_1.5£¨O£©=3£¨R₃NH£©₅HV₁₀O₂₈£¨O£©+15Cl_£¨a£©^-3H₂V₁₀O_28£¨a£©^4-+8£¨R₃NHCl£©_1.5£¨O£©=3£¨R₃NH£©₄H₂V₁₀O_28£¨O£©+12Cl_a^-

Abstract: The extraction of vanadium£¨V£©from aqueous hydrochlorie acid solutionswith N₂₃₅[whose formula is N(C_nH_2n+1)₃,n=7¡«9]in kerosene£¨with theaddition of sec.-octyl alcohol amounting to 20% by volume to prevent the formation of the third phase in the system£©has been investigated at 35¡À1¡æby the maximum saturation method and the method of continuous variation.Based on the experimental results,the chemical equations elucidatingthe mechanism of the extraction were suggested to be:H₂V₁₀O_28n^4-+£¨4/n£©£¨R₃NHCl£©_no=£¨R₃NH£©₄H₂V₁₀O₂₈₀+4Cl_?^-£¨¢ñ£©in the equilibrium pH range of 2.7¡«3.3 in the aqueous phase andHV₁₀O_28£¨a£©^5-+£¨5/n£©£¨R₃NHCl£©_no=£¨R₃NH£©₅HV₁₀O₂₈₀+5Cl_a^-£¨¢ò£©in the equilibrium pH range of 3.9¡«4.0 in the aqueous phase,where R₃Nrepresents N₂₃₅,£¨a£©and£¨o£©refer to the aqueous and organic phase respecti-vely and n is the mean degree of association of the amine hydrochloride inthe aqueous phase.In the equilibrium pH range of 3.5¡«3.8 in the aqueousphase,probably both compounds£¨¢ñ£©and£¨¢ò£©were formed in the organicphase.To evaluate n,the slope method was used.The mean degree of associati-on of the amine hydrochloride in the organic phase,n was found to be 1.5approximately under the experimental conditions specified in this paper.