求~~化工类外文论文翻译高手帮忙

Question

Using combination of Mn–Co transition metal species with
N-hydroxyphthalimide as a catalyst for one-step oxidation of cyclohexane with molecular oxygen in acetic acid at 353 K can give more than 95% selectivity towards oxygenated products with
adipic acid as a major product at a high conversion (ca. 78%).
A turnover number of 74 for this partial oxidation are also recorded.
KEY WORDS: adipic acid; one-step oxidation; catalyst; cyclohexane oxidation; N-hydroxyphthalimide; radical; selectivity.
1. Introduction
A considerable research effort has been made to
develop efficient methods for oxidation of unactivated
C–H bonds of alkanes because of the importance of the
substrates in view of both industrial and synthetic
aspects [1–7]. Catalytic oxidation of alkanes has been
explored using different oxidants [8], and those reactions
with molecular oxygen under mild conditions [9] are
especially rewarding due to its cheap availability and
production of H2O as the main harmless by-product.
However, the oxidation of cyclohexane turns out to be
the least efficient of all major industrial processes [10].
At present, the industrial oxidation of cyclohexane to
adipic acid undergoes a two-step process. The first step
involves oxidation of cyclohexane to cyclohexanone and
cyclohexanol at around 423 K and 1–2 MPa pressure
using either a soluble cobalt catalyst or no catalyst, in
the liquid phase, in which the total cyclohexane conversion
is less than 4%. Under such low conversion the
selectivity towards cyclohexanol and cyclohexanone
(KA oil) can be optimized at 70–85% without much
over-oxidation of the products [11–13]. The second step
involves oxidation of the KA oil to adipic acid via the
use of nitric acid as a mild oxidant. The side product
produced from this step includes nitrous oxide (N2O),
which shows a global warming effect of 300 times higher
than carbon dioxide. Research is on going to improve
reaction selectivity of this two-step process. For example,
addition of boric acid to the oxidation mixture
proved to be effective, which allowed approximately
10% conversion of cyclohexane with 90% selectivity for
KA oil [14]. Murahashi et al. reported the oxidation of
cyclohexane over iron powder and observed 11% conversion
with 95% selectivity to KA oil [15]. However,
finding a one-step method for manufacturing adipic acid
from cyclohexane without producing NOx is the most
urgent issue from the viewpoint of green chemistry.
There have been some interesting work led by Thomas
and co-workers in using molecular sieve catalysts with
active site isolation for the direct oxidation of cyclohexane
to adipic acid in gas phase (solvent free) [16,17].
In a similar line of research, Moden et al. have claimed
the selective nature of MnAPO-5 catalysts for the
cyclohexane oxidation [18].
要求通顺~不要谷歌等网络翻译的

Answer 1

利用相结合的锰过渡金属钴物种
N一hydroxyphthalimide的催化剂一步氧化环己烷分子氧乙酸在353 K可以给95 ％以上实现选择性氧化产品
己二酸的主要产品，较高的转换（大约78 ％ ） 。
年营业额数74本部分氧化也记录。
关键词：己二酸;一步氧化;催化剂;环己烷氧化;氮hydroxyphthalimide ;自由基;选择性。
1 。导言
有相当的研究已尽力
制定有效的方法氧化unactivated
C - H键，因为烷烃的重要性，
基板鉴于工业和合成
方面[ 1-7 ] 。烷烃催化氧化一直
探讨使用不同的氧化剂[ 8 ] ，这些反应
分子氧温和条件下[ 9 ]是
特别是有益的，因为它便宜的可用性和
生产水作为主要无害的副产品。
然而，氧化环己烷原来是
最有效的所有主要的工业生产过程[ 10 ] 。
目前，工业氧化环己烷为
己二酸经历两个步骤。第一步
涉及氧化环己烷和环己酮
环己醇约423 K和1-2兆帕的压力
使用一种可溶性钴催化剂或无催化剂，在
液相，其中总环己烷转换
小于4 ％ 。在这种低转换的
对环己烯选择性和环己酮
（家石油）可以优化在70-85 ％没有多少
过氧化的产品[ 11月13日] 。第二个步骤
涉及氧化的Ka石油己二酸通过
使用硝酸作为一个温和的氧化剂。一侧产品
产生这一步骤包括氧化亚氮（ N2O ） ，
这表明全球变暖效应的300倍
比二氧化碳。研究是要改善
反应的选择性的两个步骤。例如，
此外硼酸氧化混合物
证明是有效的，从而使大约
10 ％的转换与环己烷的选择性为90 ％
卡油[ 14 ] 。 Murahashi等。报告的氧化
环己烷的铁粉，并观察了11 ％的转换
有95 ％的选择性家油[ 15 ] 。但是，
找到一步法生产己二酸
从环己烷没有产生氮氧化物是最
紧迫的问题的观点绿色化学。
出现了一些有趣的工作由托马斯
和同事在使用分子筛催化剂
活性部位分离的直接氧化环己烷
合成己二酸气相（无溶剂） [ 16,17 ] 。
在一个类似的研究，现代等。声称
选择性质MnAPO - 5催化剂
环己烷氧化[ 18 ] 。