Process for preparing beta-zeolite

A process for preparing beta-zeolite includes mixing Al source, Na source, ammonium tetraethyl hydroxide, water and organic solvent uniformly, stirring while adding Si source and reaction including low-temp crystallization and high-temp crystallization. The mole ratio for reaction system is 0.02-0.20 for TEAOH : SiO2, 0.05-0.5 for Na2O : SiO2, 10-100 for SiO2 : Al2O3, 7-2.72 for H2O : SiO2, or 0.5-2 for organic solvent : SiO2. Its advantages are less consumption of template agent and simple post-treatment.

Polyolefin resin and nucleating agent-containing composition

The invention discloses a polyolefin resin and nucleating agent-containing composition. The composition is characterized in that: a nucleating agent is a polyalcohol diacetal-silica gel graft with a general formula (I). The polyolefin resin and nucleating agent-containing composition of the invention improves the stability of organic acetals, is highly environmentally-friendly, reduces the production cost, and particularly has remarkably improved mechanical properties and thermal properties.

Zeolite catalyst for synthesizing cumine and method for preparing cumin by using said catalyst

Process for preparing beta-zeolite

一种丙烯聚合用高效负载型催化剂及其制备方法

The present invention is efficient loaded catalyst for polymerization of propylene and its preparation process. The catalyst consists of titanium compound loaded onto active magnesium chloride and electron donor compound, and it contains Mg 15-20 wt%, Ti 1.5-4.0 wt%, electron donor compound 8-16 wt%. The electron donor compound is II-IV organic silicide and ester in the molar ratio of 0.05-0.3. The preparation process includes mainly mixing anhydrous MgCl2 and organic alcohol as inert solvent under the protection of inert gas, adding phenyl anhydride and organic silicide to obtain alcoholate; adding the alcoholate to the solution of titanium compound and adding ester for reaction; and filtering separation to obtain solid catalyst grain. The catalyst has high polymerization activity, capacity of increasing polymer grain size and decreasing polymer grain size distribution and excellent granular state.

Zeolite catalyst for synthesizing cumine and method for preparing cumin by using said catalyst

The said catalyst includes one kind of zeolite, which has a Bronsted acid amount measured in 2,6-dimethyl pyridine adsorption method greater than 0.50 millimole each gram at 200 deg.C, a molar ratio of Bronsted acid to Lewis acid being 2.5-12, a strong Bronsted acid amount measured in 2,6-dimethyl pyridine adsorption method greater than 0.08 millimole each gram, and one kind of optional inorganic oxide adhesive.

Prepn process of polypropylene catalyst

Preparation and application of emulsifying wax liquid mulch film

The invention provides biodegradable emulsifying wax liquid mulch film without toxic and pollution. The components and the mass percentage thereof of the liquid mulch film are as follows: 90 to 95 of emulsifying wax, 1 to 10 parts of water-soluble polymer molecules, 0 to 10 parts of weedicide, and 0 to 5 parts of fertilizer. The liquid mulch film can be widely applied to crops, vegetables and trees, and plays the roles of moisturizing, heat insulating, production increasing and pest resisting.

Polyolefin resin nucleating agent and preparation method thereof

The invention discloses a polyolefin resin nucleating agent and a preparation method thereof. The nucleating agent is polyol acetal-silica gel graft copolymer shown as a right general formula (I); the nucleating agent improves the stability of organic acetal and environment-friendly performance, reduces the production cost and remarkably improves the mechanical performance and thermal performance of polyolefin resin in particular.

Preparing process of slurry catalyst for gaseous ethylene polymerization

一种聚丙烯催化剂制备方法

The present invention features applying ultrasonic technology in the preparation process of polypropylene catalyst. The preparation process includes the following steps: mixing anhydrous MgCl2, organic alcohol and inert solvent, inserting ultrasonic probe into the reactor, heating to 120-150 deg.c, turning on the ultrasonic unit while tuning the ultrasonic wave frequency to 20-50 KHz, adding phenyl anhydride and organic silicide and reaction for 1-5 hr to obtain alcoholate; adding the alcoholate cooled to room temperature into titanium compound solution cooled to -40 deg.c to -15 deg.c, heating to 90-110 deg.c, adding ester and reaction at 100-130 deg.c for 1-3 hr, and filtering to separate out solid catalyst grain. Applying ultrasonic wave technology in preparing polypropylene catalyst can raise the polymerizing activity of the catalyst and the bulk density of the polymer.

Preparing method of catalyst for slurry polymerization of ethylene