摘要:
One aspect of the invention relates to a method for formulating a molecular sieve catalyst composition, the method comprising the steps of: (a) providing a synthesized molecular sieve having been recovered in the presence of a flocculant; (b) thermally treating the synthesized molecular sieve at a temperature from about 50° C. to about 250° C. and under other conditions sufficient to form a thermally treated synthesized molecular sieve having a first LOI less than 26% and a first micropore surface area; (c) aging the thermally treated synthesized molecular sieve for at least one year; (d) analyzing the aged, thermally treated molecular sieve to determine a second micropore surface area, wherein the second micropore surface area is 3% or less lower than the first micropore surface area; and (e) combining the aged, thermally treated synthesized molecular sieve, a binder, and optionally a matrix material to produce an aged, formulated molecular sieve catalyst composition.
摘要:
This invention is directed to a hardened molecular sieve catalyst composition, a method of making the composition and a method of using the composition. The catalyst composition is made by mixing together molecular sieve, liquid, and an effective hardening amount of a dried molecular sieve catalyst to form a slurry. The slurry is dried, and then calcined to form the hardened molecular sieve catalyst composition. The hardened molecular sieve catalyst is highly attrition resistant.
摘要:
This invention, in one embodiment, is drawn to a process for forming olefin product by contacting an oxygenate with an olefin-forming catalyst under supercritical conditions to form an olefin product. This invention also relates to methods for activating molecular sieve catalyst, regenerating molecular sieve catalyst, and forming and/or disposing a co-catalyst within a molecular sieve catalyst, each under supercritical conditions.
摘要:
A method of making a higher olefin product from a C4+ fraction separated from the hydrocarbon product produced by an oxygenate to olefin reaction unit. The C4+ fraction primarily contains butenes which may be directed to a higher olefin reaction unit without removing isobutenes, butanes, and/or butadiene. The C4+ fraction is particularly well suited for the production of higher olefins because of its high olefin content, low branching number, and low contaminent levels. The invention is also directed to an olefin product composition that is produced by contacting the C4+ fraction with an oligomerization catalyst. The olefin composition is characterized by a relatively high octene content, and octene with a branching number less than 1.4.
摘要翻译:从由含氧化合物产生的烃产物与烯烃反应单元分离的C 4 H 4 O + +馏分制备较高级烯烃产物的方法。 C 4 S 4+ + / - >级分主要包含可以引导到较高级烯烃反应单元而不除去异丁烯,丁烷和/或丁二烯的丁烯。 由于其高烯烃含量,低分支数和低污染物水平,C 4 S 4 O + + / O 2馏分特别适用于生产高级烯烃。 本发明还涉及一种烯烃产物组合物,该烯烃产物组合物是通过使低分子化催化剂与C 4+ 4+ 烯烃组合物的特征在于具有相对较高的辛烯含量和分支数小于1.4的辛烯。
摘要:
The invention is directed to methods of transfering catalyst particles into and within reaction systems. The reaction systems are those that use catalysts that comprise molecular sieves, particularly metalloaluminophosphate molecular sieves, especially metalloaluminophosphate molecular sieves which are susceptible to loss of catalytic activity due to contact with water molecules. The transfer methods provide appropriate mechanisms for transporting catalyst into and within a reactor to protect against loss of catalytic activity that can occur due to contact with water molecules.
摘要:
The invention is directed to a method of stabilizing metalloaluminophosphate molecular sieves and catalysts derived therefrom. In particular, the invention is directed to a method of treating such molecular sieves with chemisorbed ammonia, which may be easily desorbed before or during use and after storage. The invention is also directed to formulating the molecular sieve into a catalyst useful in a process for producing olefin(s), preferably ethylene and/or propylene, from a feedstock, preferably an oxygenate containing feedstock.
摘要:
This invention is directed to a method of rejuvenating a molecular sieve that has decreased catalytic activity as a result of contact with moisture, and a method of using the rejuvenated catalyst to make an olefin product from methanol feed. The molecular sieve can be rejuvenated by heating at a rate sufficient to increase the catalytic activity of the molecular sieve. The molecular sieve is considered to be rejuvenated when the molecular sieve has a CMCPS that is increased by at least 5% relative to that at a heat rate basis of 40° C./min over a temperature range of from 25° C. to 475° C.
摘要:
A process is described, such process comprising i) contacting a hydrocarbon feed with a heterogeneous catalyst under conditions suitable to hydrolyze nitriles present in the feed to form a nitrile hydrolysis product comprising ammonia, carboxylic acid and carboxylate salts or a mixture thereof; and ii) removing the nitrile hydrolysis product from the feed. In an embodiment, the hydrocarbon feed comprises olefins and is intended for use in an olefin oligomerization process.
摘要:
In a feed clean-up process at least two adsorbents (2, 4) are installed in front of an oligomerization reactor (3). Olefin feed is sent over one adsorbent (2) and the nitrile poisons are adsorbed so that clean feed will enter the reactor (3). Before the adsorbent (2) will be saturated, the feed (1) is sent to the other, fresh adsorbent (4). At the same time oligomerization product from the reactor (3) is used to desorb nitriles from the spent adsorbent (2).
摘要:
This invention is to a process of making olefin, particularly ethylene and propylene, from an oxygenate feed. The invention uses two or more zeolite catalysts. Examples of zeolite catalysts include a first catalyst containing of ZSM-5, and a second catalyst containing a 10-ring molecular sieve, including but not limited to, ZSM-22, ZSM-23, ZSM35, ZSM-48, and mixtures thereof. The ZSM-5 can be unmodified, phosphorous modified, steam modified having a micropore volume reduced to not less than 50% of that of the unsteamed ZSM-5, or various mixtures thereof.