A NEW METHOD OF PREPARATION OF METAL OXIDE MODIFIED INORGANIC MEMBRANE

ＡＮＥＷＭＥＴＨＯＤＯＦＰＲＥＰＡＲＡＴＩＯＮＯＦＭＥＴＡＬＯＸＩＤＥＭＯＤＩＦＩＥＤＩＮＯＲＧＡＮＩＣＭＥＭＢＲＡＮＥ￥ＲｕＺｈｉＺＨＡＮＧ；ＧｕｏＸｉｎｇＸＩＯＮＧ；ＳｈｉＳｈａｎＳＨＥＮＧａｎｄＸｉｎＳｈｅｎＬＩ（ＳｔａｔｅＫｅｙｌａｂｏｒａｔ...     

A NEW METHOD FOR THE PREPARATION OF FULLEROL

ＡＮＥＷＭＥＴＨＯＤＦＯＲＴＨＥＰＲＥＰＡＲＡＴＩＯＮＯＦＦＵＬＬＥＲＯＬ￥ＤａＹｏｎｇＳＵＮ；ＺｉＹａｎｇＬＩＵ；ＸｉｎｇＨｕａＧＵＯ；ＹｉＭｉｎＳＨＥ；ＹｕＺＨＯＵ；ＳｈｕＹｉｎｇＬＩＵ（ＴｈｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＡｐｐｌｉｅｄＳｐｅｃ...     

STUDY ON PREPARATION OF INORGANIC COMPOSITE MEMBRANE AND ITS PROPERTIES FOR HYDROGEN PERMEATION

IntroductionDevclopmcntoftcchniqucsforthcscparationofgascousmixturesisofgrcatimportancetochemicalindustries.Rccentadvanccsinceramicmaterialprocessinghavcstimulatedtheeffortstodcvclopccramicormctallicmcmbrancsforgasseparation.Suchmembraneswouldbesuitableforthescparationsathightemperatureatx`hichthcx`ellcstablishedorganicpol}mermcmbranescannotfunctionButmostcommercialceramicmembranesxvhichcanbcobtainedinmarkctaremicroporous(porediamcterfromO.ItoloPm)whereseparationmcchanismisgovcrncdbyKnudscnd…     

A NEW METHOD FOR PREPARATION OF β-LACTAM SULFOXIDES

Abstract

Penicillin sulfoxides (II) are key intermediates in chemical transformations of penicillins to cephalosporins. Oxidation of the sulfur atom in penicillin nucleus (I) to the sulfoxide (II) has been studied and a new economically feasible method developed.     

PREPARATION OF SILICALITE-1 AND ZSM-5 ZEOLITE/ CERAMIC COMPOSITE MEMBRANES

ＰＲＥＰＡＲＡＴＩＯＮＯＦＳＩＬＩＣＡＬＩＴＥ┐１ＡＮＤＺＳＭ┐５ＺＥＯＬＩＴＥ／ＣＥＲＡＭＩＣＣＯＭＰＯＳＩＴＥＭＥＭＢＲＡＮＥＳＺｈａｎｇＬｉｘｉｏｎｇ，ＪｉａＭｅｎｇｄｏｎｇ，ＭｉｎＥｎｚｅ（ＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅｏｆＰｅｔｒｏｌｅ...     

A NEW METHOD FOR THE PREPARATION OF PHENOLS AND ITS DERIVATIVES

a-Oxo ketene dithioacetals 2 via 1,2-nucleophilie addition by methallyl magnesius chloride afforded corresponding alcohols (3). Treated with water or methanol and catalyzed by Lewis acid, the alcohols 3 were converted regiospecifical ly to substituted phenols 5' or related phenol methyl ethers 5 respectively. This reaction is a novel approach to the synthesis of phenols and their derivatives starting from non-aromatic precursors.     

PREPARATION OF A NEW ZEOLITE CATALYST FOR HYDRATION OF PROPYL ENE TO ISOPROPANOL

ＰＲＥＰＡＲＡＴＩＯＮＯＦＡＮＥＷＺＥＯＬＩＴＥＣＡＴＡＬＹＳＴＦＯＲＨＹＤＲＡＴＩＯＮＯＦＰＲＯＰＹＬＥＮＥＴＯＩＳＯＰＲＯＰＡＮＯＬＬｉＷｅｉ，ＴａｏＫｅｙｉ，ＬｉＨｅｘｕａｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＮａｎｋａｉＵｎｉｖｅｒ...     

STUDIES ON THE CERAMIC MEMBRANE REACTOR FOR OXIDATIVE COUPLING OF METHANE

lntroductionNat[lralgasisanabundanresourceandtheworldreservesareestimatedtobe43trillioncubicmeers.DuetoitshightransportcostandverystablechendcalproPerty,onlylessthanlo%oftheworldproductionofnaturalgasisusedinchendcalindustriesandtheremainderisburnedasfuelforpowergeneratingandhcaing.Toincreaseitsvalueanduseitasachemicalfeedstock,naturalgasmustbeconvetaltomoreappropriatC-products.SincethepioneeringworkofKellerandBhasim(l982)atUnionCarbidell],therehasbeenconsiderableinterestinmethaneconversiont…     

PEROVSKITE OXIDES：A NEW KIND OF CATALYTIC MEMBRANE

ＰＥＲＯＶＳＫＩＴＥＯＸＩＤＥＳ：ＡＮＥＷＫＩＮＤＯＦＣＡＴＡＬＹＴＩＣＭＥＭＢＲＡＮＥ＊ＬｉＳｉｗｅｎ，ＹａｎｇＷｅｉｓｈｅｎ＊＊，ＦａｎｇＬｉａｎｑｉｎｇ，ＬｉｎＬｉｗｕ（ＤａｌｉａｎＩｎｓｔｉｔｕｔｅｏｆＣｈｅｍｉｃａｌＰｈｙｓｉｃｓ，Ｃｈｉｎ...     

A MODIFIED METHOD FOR THE PREPARATION OF GOETHITE

Synthetic goethite(α-FeOOH) was prepared in the laboratory using a modified version of Brauer's method.The process of steam-crystallization was prolonged and impurities were removed by dialysis.The products have been characterised by Surface Area Analyser and Scanning Electron Microscope, and proved to have larger Specific Surface Area than that in literature.     

A RHEOLOGICAL MODEL FOR THE PROCESS OF PREPARATION OF AN EARTHQUAKE

In this paper we try to explain the mechanical aspects of earthquake preparation process and pre-earthquake creep with the steady growth model of an in-plane shear (mode-Ⅱ) crack in rheologic materials. The fault creep which has occurred during the whole period of stable rupture propagation is the pre-earthquake creep. The result of our estimate shows that a considerable pre-earthquake creep had probably occurred before the Tangshan earthquake.     

A NOVEL APPROACH FOR THE PREPARATION OF MEDIUM-SIZE LACTAMS

ＡＮＯＶＥＬＡＰＰＲＯＡＣＨＦＯＲＴＨＥＰＲＥＰＡＲＡＴＩＯＮＯＦＭＥＤＩＵＭ－ＳＩＺＥＬＡＣＴＡＭＳ￥ＹｕｎＸｉｎＢｏ；ＤｏｎｇＬｕＢＡＩ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭａｔｅｒｉａＭｅｄｉｃａ，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎ...     

A NEW METHOD FOR THE SYNTHESIS OF ARYLTHIOCYANATES

Arylthiocyanates could be synthesized by reaction of arylsulfonyl chlorides with cuprous cyanide with yields ranging from 42-80％.     

STUDIES ON FLUOROALKYLATION AND FLUOROALKOXYLATION 17.A NEW METHOD FOR PREPARATION OF 2-FLUOROALKYL PYRROLE

The examples for fluoroalkylating heteroaromatic compounds are rather few.Wak-selman et.al.reported the reaction Of perfluoroalkyl iodides with N-methyl pyrroleunder thermal conditions,but failed for pyrrole tself.However,Kobayashi et.al.found that 2-trifluoromethyl pyrrole conld be obtained under UV irradiation for 3 days     

APPLICATION OF N-DOPED CARBON NANOTUBES FOR THE PREPARATION OF HIGHLY DISPERSED PdO–CeO2 COMPOSITE CATALYSTS

Journal of Structural Chemistry - Pd–CeO2 catalytic composites deposited on the surface of carbon nanomaterials (CNMs) can act as model systems for probing the nature of active sites of...     

A NEW METHOD FOR PREPARATION OF IRON（Ⅱ） PORPHYRIN COMPLEX－ISOLATION AND CHARACTERIZATION OF AMINE COMPLEX OF FERROUS PORPHYRIN

ＡＮＥＷＭＥＴＨＯＤＦＯＲＰＲＥＰＡＲＡＴＩＯＮＯＦＩＢＯＮ（ＩＩ）ＰＯＲＰＨＹＲＩＮＣＯＭＰＬＥＸ－ＩＳＯＬＡＴＩＯＮＡＮＤＣＨＡＲＡＣＴＥＲＩＺＡＴＩＯＮＯＦＡＭＩＮＥＣＯＭＰＬＥＸＯＦＦＥＲＲＯＵＳＰＯＲＰＨＹＲＩＮ￥ＸｉｎＨｕａＺＨＯＮＧ；Ｙ...     

A NEW RAPID FLUOROMETRIC METHOD FOR DETERMINATION OF SULFONAMIDES

Ａ ＮＥＷ ＲＡＰＩＤ ＦＬＵＯＲＯＭＥＴＲＩＣ ＭＥＴＨＯＤ ＦＯＲ ＤＥＴＥＲＭＩＮＡＴＩＯＮ ＯＦ ＳＵＬＦＯＮＡＭＩＤＥＳ￥ＨｕａｉＮａＬＩａｎｄＹｕｎＸｉａｎｇＣＩ（ＤｅｐｔｏｆＣｈｅｍｉｓｔｒｙ．ＰｅｋｉｎｇＵｎｉｖｅｒｓｉｔｙ．Ｂｅｉｊ...