Abstract:
TtLl(SP)m-[M(II)1-xM(III)x(OH)2 X+(Ax/n)= yH2O) is one that anion phosphine metal complex(eqn 1: TtLl(SP)m) is coupled between layers of hydrotalcite compound (eqn 2: [M(II)1-xM(III)x(OH)2 X+(Ax/n)= yH2O), where T is Rh, Co, Ru, Ir, Pt, Ni, Cu, Mn, Fe, Pd, Ag or Au; L is Cl, CO, NO, COD, H, SR, OH, NH3 or alkylamine; SP is anion phosphine ligand, sulfonated or carbonated alkyl or anion allyl phosphine; t is 1-2; l is 0-8; m is 1-8; M(II) is Mg, Ni, Co, Fe, An, Cu or Li; M(III) is Al, Cr or Fe; A is organic or inorganic anion with quantity of electric charge of n; X is 0.2-0.4; n is the quantity of electric charge of A; y is the number of water molecule.
Abstract:
The method producing methyl metacrylate or ethyl metacrylate continuosly and recovering non-reaction metacrylic acid and alcohols. Metacrylic acid is synthesized by gas-phase catalytic oxidizing at least one compound of isobutylene, t-butanol and metacrolein. In manufacturing metacrylic acid ester with metacrylic acid, alcohol and solid-acid catalyst, the reaction temp is 60-130 deg.C, and pressure is 0-30 psig. A fluidized bed catalyst reactor is used for continuous production. Mixing solvents selected from aromatics such as ethylbenzene, xylene and cumene and from aliphatic such as nonane, decane, decaline and tetraline are used as esterification solvent. The above solid-acid catalyst are porous polystyrene base cation exchange resin and fluorine base cation exchange resin.
Abstract:
A catalyst of formula Mo12Bi1FeaCobNicPbdSieAfDgOx [where A= at least one selected from a gp. of Cu, V, P, Te, Cr and Mn; D= at least one selected from a gp. of K, Rb, Ba, Mg and Ca; a=b=c=d 0.1 -6, e= 2.5- 15, f= 0.1-6, g= 0.05-5, x= bal. no. for producing methacrolein e.g. is prepd. by (a) dispersing silica powder into Mo and aq. soln. of the D, (b) co-pptg. with Fe, Co, Ni, Pb and aq. soln. of the A, (c) ripening after adding dild. HNO3-Bi soln., (d) spray-drying or evapg. to slurry state, (e) drying at below 100 deg. C, (f) calcining at 210 deg. C and molding, and (g) recalcining for 6 hr at 550 deg. C.
Abstract translation:式Mo12Bi1FeaCobNicPbdSieAfDgOx的催化剂[其中A =至少一种选自gp。 的Cu,V,P,Te,Cr和Mn; D =从gp中选出的至少一个。 的K,Rb,Ba,Mg和Ca; a = b = c = d 0.1 -6,e = 2.5-15,f = 0.1-6,g = 0.05-5,x = bal。 没有。 用于制备甲基丙烯醛,例如 是prepd 通过(a)将二氧化硅粉末分散在Mo和水溶液中。 SOLN。 的D,(b)co-pptg。 与Fe,Co,Ni,Pb和aq。 SOLN。 的A,(c)添加胆汁后成熟。 HNO3-Bi溶胶,(d)喷雾干燥或蒸发。 (e)在100℃以下干燥。 (f)在210℃煅烧 并且(g)在550度下重新煅烧6小时。 C。
Abstract:
본발명은광학이성질체가혼합된락타이드시료를알킬프로피오네이트(alkyl propionate) 및물을함유하는혼합용매로재결정하는단계를포함하는광학순도가향상된 L- 또는 D-락타이드의제조방법에관한것이다. 본발명의제조방법은선택적으로광학적순도는높이고산성도는낮은락타이드를제공할수 있으므로, 상기제조방법에의해생산된고순도의락타이드는분자량이큰 고급폴리락타이드의생산에유용하게사용될수 있다.
Abstract:
본발명은광학이성질체가혼합된락타이드시료를알킬프로피오네이트(alkyl propionate) 및물을함유하는혼합용매로재결정하는단계를포함하는광학순도가향상된 L- 또는 D-락타이드의제조방법에관한것이다. 본발명의제조방법은선택적으로광학적순도는높이고산성도는낮은락타이드를제공할수 있으므로, 상기제조방법에의해생산된고순도의락타이드는분자량이큰 고급폴리락타이드의생산에유용하게사용될수 있다.