摘要:
The present invention relates to chelating resins containing methyleneaminoethylsulfonic acid groups, a process for producing them and also their use for removing heavy metals or metals of value from aqueous solutions having a pH of
摘要:
The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having acetic acid and/or iminodiacetic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, to the chelating exchangers themselves, and also to uses thereof.
摘要:
There is disclosed a process for transporting fracture fluid additives underground to oil and gas wells by attaching a fracture fluid additive to an ion exchange resin and flowing the ion exchange resin underground and thereafter releasing the frac fluid additives from the ion exchange resins and also there is provided the use of an ion exchange resin as a proppant and a frac fluid lubricant.
摘要:
The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having acetic acid and/or iminodiacetic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, to the chelating exchangers themselves, and also to uses thereof.
摘要:
The present invention relates to a method for improved removal of cations, preferably alkaline earth metals, in particular calcium and barium, from aqueous solutions using chelating resins having aminomethylphosphonic acid groups and iminodimethylphosphonic acid groups having high dynamic absorption capacity for cations at a low residual content of the cations and high regeneration efficiency, and a markedly lengthened loading duration of the chelating resin, to the chelating exchangers themselves, and also to uses thereof.
摘要:
The present application relates to novel monodisperse, gel-type or macroporous picolylamine resins which are based on at least one monovinylaromatic compound and at least one polyvinylaromatic compound and/or a (meth)acrylic compound and contain tertiary nitrogen atoms in structures of the general formula (I) as functional group, where R1 is an optionally substituted radical from the group consisting of picolyl, methylquinoline and methylpiperidine, R2 is a radical —(CH2)q—COOR3, R3 is a radical from the group consisting of H, Na and K, m is an integer from 1 to 4, n and p are each, independently of one another, a number in the range from 0.1 to 1.9 and the sum of n and p is 2, q is an integer from 1 to 5 and M is the polymer matrix, a process for preparing them and their uses, in particular the use in hydrometallurgy and electroplating.
摘要:
The present invention relates to heat-stable anion exchangers based on at least one aromatic monomer and at least one crosslinker having structural elements of the general formula (I) where Ak, Ak′, Ak″ are in each case independently of one another identically or differently a C1-C18-alkyl radical, n is an even number between 5 and 18, x+y=2 and X is Cl, Br, OH, HCO3, HSO4, ½ (SO4), ½ CO3, NO3, F, H2PO4, ½ HPO4, ⅓ PO4 with the result that these anion exchangers, preferably in the OH form, withstand a working temperature of at least 60° C., preferably of at least 80° C., over a relatively long time, a process for production thereof and also use thereof.
摘要翻译:本发明涉及基于至少一种芳族单体和至少一种具有通式(I)的结构元件的交联剂的热稳定阴离子交换剂,其中Ak,Ak',Ak“在每种情况下彼此独立地彼此独立地 或者不同的是C 1 -C 18 - 烷基,n是5至18之间的偶数,x + y = 2,X是Cl,Br,OH, HCO 3,HSO 4,½(SO 4 S),1/3 CO 3,NO 3, / SUB,F,H 2 PO 4,1/2 HPO 4,1/3 PO 4,和 结果是这些阴离子交换剂优选为OH形式,在相当长的时间内经受至少60℃,优选至少80℃的工作温度,其制备方法及其用途。
摘要:
There is disclosed a process for transporting fracture fluid additives underground to oil and gas wells by attaching a fracture fluid additive to an ion exchange resin and flowing the ion exchange resin underground and thereafter releasing the frac fluid additives from the ion exchange resins and also there is provided the use of an ion exchange resin as a proppant and a frac fluid lubricant.
摘要:
Disclosed are processes for preparing monomer complexes that include contacting 2,3,5,6-tetraminopyridine free base in water with 2,5-dihydroxy terephthalic acid dipotassium salt to form an aqueous mixture, and adjusting the pH of the aqueous mixture to within the range of from about (3) to about (5) to precipitate the monomer complex. Processes of polymerizing the monomer complexes, polyareneazoles, filaments and yarns are also disclosed.
摘要:
The present invention relates to the use of inorganic salts for increasing the adsorption of oxoanions and/or thioanalogues thereof to metal-doped ion exchangers, preferably to iron oxide/iron oxyhydroxide-containing ion exchangers, preferably from water or aqueous solutions, and also the conditioning of these metal-doped ion exchangers having increased adsorption behaviour toward oxoanions and/or thioanalogues thereof by using inorganic salts with the exception of amphoteric ion exchangers which have both acidic and basic groups as functional groups.