Weekly topic: 8 wealth points for those who answer correctly, 2 wealth points for participation； Question 129

Conditions that an ideal catalyst carrier should possess: Answer: (1) It should have a shape and size suitable for the reaction process； ⑵It has sufficient mechanical strength to withstand mechanical or thermal stresses during the reaction process ； It has sufficient tensile strength to resist cracking caused by side reaction products (such as carbon deposits) or contaminants that gradually accumulate in the pores during catalyst use ； ⑶It has a sufficient specific surface area, an appropriate pore structure, and water absorption rate, enabling the uniform loading of active components and catalyst promoters on its surface to meet the requirements of catalytic reactions ； ⑷It has sufficient stability to resist chemical erosion from active components, reactants, and products, and can withstand catalyst regeneration processes ； ⑸Heat-resistant, with an appropriate thermal conductivity ； ⑹Free of substances that can poison the catalyst or increase side reactions ； ⑺The raw materials are readily available and easy to obtain; their use in preparing carriers as well as catalysts does not cause environmental pollution ； ⑻It can undergo beneficial chemical reactions with the active components ； ⑼It can prevent the catalyst from deactivating

(1) The polymer carrier used for solid-state reactions should be completely insoluble in common solvents, (2) it should have considerable rigidity (non-swellable) or considerable flexibility (swellable type)； (3) A high degree of functionalization can be achieved; the functional groups are evenly distributed within the polymer, and there are appropriate analytical methods for these functional groups ； (4) Whether it is a rigid or flexible polymer, its functional groups should be easily accessible to reagent and solvent molecules. Sometimes, the accessibility of functional groups can be improved by attaching active functional groups to the polymer backbone through \"long handles\" or \"linker arms\" ； (5) Functional polymers can react directly with reagents or catalysts, preferably without side reactions ； (6) Functional polymers can be compatible with the solvents, reagents, and catalysts used ； (7) It is easy to use, and no mechanical damage occurs during synthesis operations ； (8) Used functional polymers can be regenerated and reused through simple and economical methods. From Baidu.

(1) The polymer carrier used for solid-state reactions should be completely insoluble in common solvents, (2) it should have considerable rigidity (non-swellable) or considerable flexibility (swellable type)； (3) A high degree of functionalization can be achieved; the functional groups are evenly distributed within the polymer, and there are appropriate analytical methods for these functional groups ； (4) Whether it is a rigid or flexible polymer, its functional groups should be easily accessible to reagent and solvent molecules. Sometimes, the accessibility of functional groups can be improved by attaching active functional groups to the polymer backbone through \"long handles\" or \"linker arms\" ； (5) Functional polymers can react directly with reagents or catalysts, preferably without side reactions ； (6) Functional polymers can be compatible with the solvents, reagents, and catalysts used ； (7) It is easy to use, and no mechanical damage occurs during synthesis operations ； (8) Used functional polymers can be regenerated and reused through simple and economical methods

What requirements should reagents and catalyst carriers meet? (1) The polymer carrier used for solid-state reactions should be completely insoluble in common solvents, (2) it should have considerable rigidity (non-swellable) or considerable flexibility (swellable type) ； (3) A high degree of functionalization can be achieved; the functional groups are evenly distributed within the polymer, and there are appropriate analytical methods for these functional groups ； (4) Whether it is a rigid or flexible polymer, its functional groups should be easily accessible to reagent and solvent molecules. Sometimes, the accessibility of functional groups can be improved by attaching active functional groups to the polymer backbone through “long handles” or “linker arms” ； (5) Functional polymers can react directly with reagents or catalysts, preferably without side reactions ； (6) Functional polymers can be compatible with the solvents, reagents, and catalysts used ； (7) It is easy to use, and no mechanical damage occurs during synthesis operations ； (8) Used functional polymers can be regenerated and reused through simple and economical methods

1. The polymer carrier used for solid-state reactions should be completely insoluble in ordinary solvents. 2. It should have considerable rigidity (non-swellable) or considerable flexibility (swellable type)； 3. A high degree of functionalization can be achieved; the functional groups are evenly distributed within the polymer, and there are appropriate analytical methods for these functional groups ； 4. Whether it is a rigid or flexible polymer, its functional groups should be easily accessible to reagent and solvent molecules. Sometimes, the accessibility of these functional groups can be improved by attaching them to the polymer backbone through \"long handles\" or \"linker arms\" ； 5. Functional polymers can react directly with reagents or catalysts, preferably without side reactions ； 6. Functional polymers can be compatible with the solvents, reagents, and catalysts used ； 7. It is easy to use, and no mechanical damage occurs during synthesis operations ； 8. Used functional polymers can be regenerated and reused through simple and economical methods.

This post was last edited by Siji on 2015-8-5 09:43. Requirements for reagent and catalyst carriers: (1) Polymer carriers used in solid-phase reactions should be completely insoluble in common solvents. (2) They should either be sufficiently rigid (non-swellable) or sufficiently flexible (swellable). (3) A high degree of functionalization should be achievable, with functional groups being evenly distributed within the polymer, and appropriate methods for analyzing these functional groups should be available. (4) In both rigid and flexible polymers, the functional groups should be readily accessible to reagent and solvent molecules. Sometimes this can be achieved through

Catalyst carriers should possess: a high specific surface area, mechanical strength, good thermal conductivity, appropriate shape and size, as well as relatively stable physical and chemical properties.

1) The polymer carrier used for solid-state reactions should be completely insoluble in common solvents, (2) it should have sufficient rigidity (non-swellable) or sufficient flexibility (swellable type)； (3) A high degree of functionalization can be achieved; the functional groups are evenly distributed within the polymer, and there are appropriate analytical methods for these functional groups ； (4) Whether it is a rigid or flexible polymer, its functional groups should be easily accessible to reagent and solvent molecules. Sometimes, the accessibility of functional groups can be improved by attaching active functional groups to the polymer backbone through \"long handles\" or \"linker arms\" ； (5) Functional polymers can react directly with reagents or catalysts, preferably without side reactions ； (6) Functional polymers can be compatible with the solvents, reagents, and catalysts used ； (7) It is easy to use, and no mechanical damage occurs during synthesis operations ； (8) Used functional polymers can be regenerated and reused through simple and economical methods

Answer: (1) The polymer carrier used for solid-state reactions should be completely insoluble in common solvents, (2) it should have considerable rigidity (non-swellable) or considerable flexibility (swellable type)； (3) A high degree of functionalization can be achieved; the functional groups are evenly distributed within the polymer, and there are appropriate analytical methods for these functional groups ； (4) Whether it is a rigid or flexible polymer, its functional groups should be easily accessible to reagent and solvent molecules. Sometimes, the accessibility of functional groups can be improved by attaching active functional groups to the polymer backbone through \"long handles\" or \"linker arms\" ； (5) Functional polymers can react directly with reagents or catalysts, preferably without side reactions ； (6) Functional polymers can be compatible with the solvents, reagents, and catalysts used ； (7) It is easy to use, and no mechanical damage occurs during synthesis operations ； (8) Used functional polymers can be regenerated and reused through simple and economical methods

What requirements should reagents and catalyst carriers meet? 1. The polymer carrier used in solid-phase reactions is completely insoluble in ordinary solvents. 2. It possesses either considerable rigidity or considerable flexibility. 3. A high degree of functionalization can be achieved, with the functional groups being evenly distributed within the polymer; appropriate analytical methods are available for these functional groups. 4. In both rigid and flexible polymers, the functional groups are easily accessible to reagent and solvent molecules. 5. Functional polymers can react directly with reagents or catalysts. 6. Functional polymers are compatible with the solvents, reagents, and catalysts used. 7. No mechanical damage occurs during synthesis. 8. They can be regenerated