Solid State S-Methylation of Thiols and O-Methylation of Phenols and Naphthols with Dimethyl Sulfate Under Microwave Irradiation
摘要:
Mild and efficient S-methylation of thiols and o-methylation of phenols and naphthols occurs with dimethyl sulfate (DMS) supported on basic alumina under microwave irradiation in solventless system.
Process for manufacturing a densified polymer powder, and process of melt processing a densified polymer powder
申请人:SABIC GLOBAL TECHNOLOGIES B.V.
公开号:US10596727B2
公开(公告)日:2020-03-24
Process for manufacturing a densified polymer powder comprising compressing a polymer feed that has a bulk density of less than or equal to 240 kg/m in a roll compactor comprising at least two compaction rolls to obtain a densified polymer material, wherein a gap between the two rolls is 0.5 to 10 mm, wherein the compaction rolls operate at a speed of 3 to 30 rpm, wherein an applied pressure of the roll compactor is 0.5 to 5 MPa, and milling the densified polymer material to obtain a densified polymer powder, wherein a bulk density of the densified polymer powder is greater than or equal to 250 kg/m3.
PROCESS FOR MANUFACTURING A DENSIFIED POLYMER POWDER, AND PROCESS OF MELT POLYMERIZING A DENSIFIED POLYMER POWDER
申请人:SABIC GLOBAL TECHNOLOGIES B.V.
公开号:US20170232640A1
公开(公告)日:2017-08-17
Process for manufacturing a densified polymer powder comprising compressing a polymer feed that has a bulk density of less than or equal to 240 kg/m in a roll compactor comprising at least two compaction rolls to obtain a densified polymer material, wherein a gap between the two rolls is 0.5 to 10 mm, wherein the compaction rolls operate at a speed of 3 to 30 rpm, wherein an applied pressure of the roll compactor is 0.5 to 5 MPa, and milling the densified polymer material to obtain a densified polymer powder, wherein a bulk density of the densified polymer powder is greater than or equal to 250 kg/m3.
Solid State S-Methylation of Thiols and O-Methylation of Phenols and Naphthols with Dimethyl Sulfate Under Microwave Irradiation
作者:Majid M. Heravi、Neda Zamani Ahari、Hossein A. Oskooie、Mitra Ghassemzadeh
DOI:10.1080/10426500590885165
日期:2005.7.1
Mild and efficient S-methylation of thiols and o-methylation of phenols and naphthols occurs with dimethyl sulfate (DMS) supported on basic alumina under microwave irradiation in solventless system.