37 用饱和水蒸气加热原油，为减少总热阻，应采取的最有 ...？ 37 用饱和水蒸气加热原油，为减少总热阻，应采取的最有效的措施是（ ）。 A ．增加水蒸气流量 B ．采用导热系数大的管材 C ．增加原油流量 D ．用螺纹管代替光滑管以改善传热面结构 为什么可以增加原油量？ 查看更多3个回答 . 3人已关注
各位大侠，我查到美国专利看不到图文? <DIV > <DIV ><IMG src="http://www.organicchem.com/bbs/skins/Default/topicface/face1.gif"></DIV><B>[求助]我查到美国专利看不到图文?</B></DIV> <DIV> < >我不知道要装一个什么软件才能看到专利的images啊?按这个键之后，不能打开．请问是什么软件没装！以前一直用已经装了的，能看到结构式，现在我看不到，都是代号！如</P> <CENTER><IMG src="http://patft.uspto.gov/netaicon/PTO/patfthdr.gif"> <BR> <TABLE> <TR> <TD align=middle><a href="http://www.uspto.gov/patft/index.html" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/home.gif" border=0></A> <a href="http://patft.uspto.gov/netahtml/PTO/search-bool.html" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/boolean.gif" border=0></A> <a href="http://patft.uspto.gov/netahtml/PTO/search-adv.htm" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/manual.gif" border=0></A> <a href="http://patft.uspto.gov/netahtml/PTO/srchnum.htm" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/number.gif" border=0></A> <a href="http://www.uspto.gov/patft/help/help.htm" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/help.gif" border=0></A> </TD></TR> <TR> <TD align=middle><a href="http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=6747163.PN.&OS=PN/6747163&RS=PN/6747163#bottom" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/bottom.gif" border=0></A> </TD></TR> <TR> <TD align=middle><a href="http://ebiz1.uspto.gov/vision-service/ShoppingCart_P/ShowShoppingCart?backUrl1=http%3A//patft1.uspto.gov/netacgi/nph-Parser?Sect1%3DPTO1%26Sect2%3DHITOFF%26d%3DPALL%26p%3D1%26u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%26r%3D1%26f%3DG%26l%3D50%26s1%3D6747163.PN.%26OS%3DPN%2F6747163&backLabel1=Back%20to%20Document%3A%206747163" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/cart.gif" border=0></A> <a href="http://ebiz1.uspto.gov/vision-service/ShoppingCart_P/AddToShoppingCart?docNumber=6747163&backUrl1=http%3A//patft1.uspto.gov/netacgi/nph-Parser?Sect1%3DPTO1%26Sect2%3DHITOFF%26d%3DPALL%26p%3D1%26u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%26r%3D1%26f%3DG%26l%3D50%26s1%3D6747163.PN.%26OS%3DPN%2F6747163&backLabel1=Back%20to%20Document%3A%206747163" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/order.gif" border=0></A> </TD></TR> <TR> <TD align=middle><a href="http://patimg2.uspto.gov/.piw?Docid=06747163&homeurl=http%3A%2F%2Fpatft.uspto.gov%2Fnetacgi%2Fnph-Parser%3FSect1%3DPTO1%2526Sect2%3DHITOFF%2526d%3DPALL%2526p%3D1%2526u%3D%25252Fnetahtml%25252FPTO%25252Fsrchnum.htm%2526r%3D1%2526f%3DG%2526l%3D50%2526s1%3D6747163.PN.%2526OS%3DPN%2F6747163%2526RS%3DPN%2F6747163& ageNum=&Rtype=&SectionNum=&idkey=NONE&Input=View+first+page" target="_blank" ><IMG src="http://patft.uspto.gov/netaicon/PTO/image.gif" border=0></A> </TD></TR></TABLE></CENTER> < > <TABLE width="100%"> <TR> <TD align=left width="50%"></TD> <TD vAlign=bottom align=right width="50%"><FONT size=-1>( <STRONG>1</STRONG></FONT> <FONT size=-2>of</FONT> <STRONG><FONT size=-1>1</STRONG> )</FONT></TD></TR></TABLE></P> <HR> < > <TABLE width="100%"> <TR> <TD align=left width="50%"><B>United States Patent </B></TD> <TD align=right width="50%"><B><B><I></I></B>6,747,163</B></TD></TR> <TR> <TD align=left width="50%"><B>Rubinsztain , et al.</B> </TD> <TD align=right width="50%"><B>June 8, 2004 </B></TD></TR></TABLE></P> <HR> < ><FONT size=+1>Method for the isolation of 6.alpha., 9.alpha.-difluoro-11.beta., 17.alpha.-dihydroxy-16.alpha.-methylpregna-3-oxo-1,4-diene-17.beta.-carbox ylic acid </FONT><BR><BR></P> <CENTER><B>Abstract</B></CENTER> < >The invention provides a process for the preparation and isolation of compound of formula 2, comprising the following steps: ##STR1## oxidizing Flumethasone dissolved in a tetrahydrofuran-water mixture with periodic acid at a temperature lower than 30.degree. C.; cooling the reaction mixture to a temperature lower than 10.degree. C.; adding an antisolvent precooled to a temperature lower than 10.degree. C.; and separating the precipitated crystal by filtration, whereby there is obtained a compound of formula 2 in a yield of at least 98% and of a chromatographic purity of at least 99%. </P></DIV>查看更多6个回答 . 4人已关注
aspenplusDSTUW中回流比对理论板的表格怎么画图？ 首先选中calculationOptions 中的generate table of reflux ratio xs number of theoretical stages，如图11示，把下面的参数输进去， 第二部就是运行后，在查看结果处，找到reflux ratio Profile，theoretical stages作为X轴，reflux ratio作为Y轴，显示图表就行了，如图22所示。查看更多5个回答 . 1人已关注
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