COMBINED INTERNAL DONOR SYSTEM FOR ZIEGLER-NATTA POLYOLEFIN CATALYSTS AND METHODS OF MAKING AND USING SAME
申请人:BASF Corporation
公开号:US20160046740A1
公开(公告)日:2016-02-18
Solid catalyst components are disclosed including titanium, magnesium, halogen and an internal electron donor compound having a combination of internal electron donor compounds including at least one 1,8-naphthyl diester and at least one secondary internal donor compound selected from alkyl 2-alkoxy-1-naphthoates, alkyl 2-alkoxybenzoates, alkyl 2,6-dialkoxybenzoates, (2-alkoxyphenyl)(pyrrolidin-1-yl)alkanones, dialkyl phthalates, alkyl alkionates, and dialkyl cyclohexane-1,2-dicarboxylates, and catalyst systems containing the catalyst solid components, organoaluminum compounds, and organosilicon compounds. Further, methods of making the catalyst components and the catalyst systems are disclosed as well as methods of polymerizing or copolymerizing alpha-olefins using the catalyst systems.
Method For Inhibiting Gas Hydrate Blockage In Oil And Gas Pipelines
申请人:Clariant International, Ltd.
公开号:US20200377784A1
公开(公告)日:2020-12-03
This invention relates to a method for inhibiting the agglomeration of gas hydrates, comprising the injection of an anti-agglomerant comprising a N,N-dialkyl-ammoniumalkyl fatty acid amide represented by the formula (I)
wherein
R
1
is an alkyl or alkenyl group having from 7 to 21 carbon atoms,
R
2
and R
3
are each independently an alkyl group containing 1 to 10 carbon atoms, or together form an optionally substituted ring having 5 to 10 ring atoms, wherein the ring may carry up to 3 substituents,
R
4
is hydrogen or an alkyl group having 1 to 6 carbon atoms,
R
5
is hydrogen or an optionally substituted hydrocarbyl group having 1 to 22 carbon atoms and
A is an alkylene group having two or three carbon atoms, into a fluid comprising gas, water and oil under conditions prone to the formation of gas hydrates,
wherein the N,N-dialkyl-ammoniumalkyl fatty acid amide represented by formula (I) is produced by the aminolysis of an ester of a fatty acid and a C
1
- to C
4
-alcohol with an N,N-dialkylamino alkyl amine and subsequent neutralization with a carboxylic acid.
US9738736B2
申请人:——
公开号:US9738736B2
公开(公告)日:2017-08-22
Long-Chain Alkyl Cyanides: Unprecedented Volatile Compounds Released by <i>Pseudomonas</i>
and <i>Micromonospora</i>
Bacteria
作者:Diogo Montes Vidal、Anna-Lena von Rymon-Lipinski、Srinivasa Ravella、Ulrike Groenhagen、Jennifer Herrmann、Nestor Zaburannyi、Paulo H. G. Zarbin、Adithi R. Varadarajan、Christian H. Ahrens、Laure Weisskopf、Rolf Müller、Stefan Schulz
DOI:10.1002/anie.201611940
日期:2017.4.3
chain elongation and dehydration in the fatty acid biosynthesis leads to either unbranched saturated or unsaturated nitriles with an ω−7 double bond, such as (Z)‐11‐octadecenenitrile, or methyl‐branched unsaturated nitriles with the double bond located at C‐3, such as (Z)‐13‐methyltetradec‐3‐enenitrile. The nitrile biosynthesis starts from fatty acids, which are converted into their amides and finally