Structure effect of activated carbon in Ru/AC catalysts for hydrogenation of phthalates
摘要:
Activated carbon with different microporous surface area were used to prepare a series of Ru/AC catalysts for the hydrogenation of dioctyl phthalate (DOP) to dioctyl 1,2-cyclohexanedicarboxylate (DOCH). The presence of micropores benefit the dispersion of Ru, but Ru particles encapsulated into the micropores can be hardly accessed by DOP molecule. An appropriate microporous surface area of the support should be crucial important for the preparation of highly efficient catalyst for phthalates hydrogenation. The as-prepared 0.45%Ru/AC-2 catalyst (Micropore surface area = 604 m(2)/g) exhibited the best activity in DOP hydrogenation with a TOF of 1406 h(-1) due to its suitable micropore surface area.
Dicarboxylic diester, process for producing the same, and refrigerating machine lubricating oil comprising the ester
申请人:Kawahara Yasuyuki
公开号:US20050038283A1
公开(公告)日:2005-02-17
A diester represented by the formula
wherein A represents a cyclohexane ring, cyclohexene ring or benzene ring, X is H or methyl group, R
X
and R
Y
are the same or different and each is C3-C18 branched-chain alkyl group, C1-C18 straight-chain alkyl group, C2-C18 straight-chain alkenyl or C3-C18 cycloalkyl, provided that when A is a benzene ring, R
X
and R
Y
are different from each other and —COOR
X
and —COOR
Y
are attached to two adjacent carbon atoms of the benzene ring, and having the following properties:
1) a total acid number of 0.05 mgKOH/g or less, 2) a sulfated ash content of 10 ppm or less, 3) a sulfur content of 20 ppm or less, 4) a phosphorus content of 20 ppm or less, 5) a peroxide value of 1.0 meq/kg or less, 6) a carbonyl value of 10 or less;
7) a volume resistivity of 1×10
11
Ω·cm or more, 8) a hydroxyl value of 3 mgKOH/g or less, and 9) a water content of 100 ppm or less, a process for preparing the same and a refrigerator lubricating oil comprising the diester.
PROCESS FOR PRODUCING EXPANDABLE STYRENE POLYMER COMPOSITIONS
申请人:Husemann Wolfram
公开号:US20110291040A1
公开(公告)日:2011-12-01
A composition comprising at least one expandable styrene polymer component and at least one cyclohexanecarboxylic ester and also optionally further components can be processed to mechanically robust foam materials.
CYCLOHEXANE POLYCARBOXYLIC ACID DERIVATIVES AS PLASTICIZERS FOR ADHESIVES AND SEALANTS
申请人:Mack Helmut
公开号:US20110232825A1
公开(公告)日:2011-09-29
The invention provides an adhesive or sealant comprising at least (A) one compound selected from the group consisting of silylated polyurethanes, silylated polyureas, silylated polyethers, silylated polysulfides and silyl-terminated acrylates, and at least (B) one cyclohexane polycarboxylic acid derivative. The composition has enhanced extensibility with good adhesion properties and high tensile strength. A process is disclosed for preparing the adhesive or sealant, and also disclosed is the use thereof for producing material bonds between parts to be joined.
LUBRICATING OIL FOR REFRIGERATOR, HYDRAULIC FLUID COMPOSITION FOR REFRIGERATOR AND METHOD FOR LUBRICATION OF REFRIGERATOR
申请人:NEW JAPAN CHEMICAL CO.,LTD.
公开号:EP1225213A1
公开(公告)日:2002-07-24
The invention provides a lubricating oil for refrigerators, comprising (a) at least one ester represented by the formula (1)
wherein R1 is C1 to C18 straight-chain alkyl or C3 to C18 branched-chain alkyl; R2 is H, C1 to C18 straight-chain alkyl or C3 to C18 branched-chain alkyl; with the poviso that the total number of carbons contained in the alkyls represented by R1 and R2 is 2 to 18 and that when R2 is H, R1 is branched-chain alkyl; and R3 is C1 to C20 straight-chain alkyl, C3 to C20 branched-chain alkyl or C3 to C10 cycloalkyl, optionally in combination with (b) at least one member selected from the group consisting of fatty acid polyol esters, phthalic acid esters, alicyclic dicarboxylic acid esters, polyvinyl ethers, hydrocarbon oils and polyalkylene glycols; as well as a method for lubricating a refrigerator using such a lubricating oil, and a working fluid composition for refrigerators comprising (I) component (a) or components (a) and (b) and (II) a refrigerant.