41results about How to "Poor miscibility" patented technology

The raw material for a ZnO—Pr-based varistor is mixed with cobalt and potassium to prepare a ceramic raw material powder. Potassium, which is an alkali metal, is added in the form of KClO4, KHC4H4O6, PtCl6, or K3[Co(NO2)6]. The ceramic raw material powder is pulverized by a wet process while 0.1 to 5.0 wt % of polycarboxylate dispersant is added to the powder. Such a method can produce a reliable, high-quality varistor having excellent varistor characteristics, such as varistor voltage V1mA and insulation resistance IR, and less variation in these characteristics.

A system for reducing the refrigerant pressure in an oil sump (10) or in a cavity (352) of a housing. The invention is particularly useful for reducing pressure in a compressor (23) for heat pump applications that has been validated for water chiller operations or in turbine and generator systems in ORC systems generating electricity using refrigerant, the ORC systems essentially being a heat pump application operating in reverse. An auxiliary compressor (509), an auxiliary condenser (709) or an ejector pump (609) may be used to reduce pressure in the oil sump (10), to separate refrigerant from oil. The auxiliary compressor (509), the auxiliary condenser (709) or the ejector pump (609) may also be used to reduce the pressure of refrigerant in the housing of a compressor in heat pump applications at temperatures and pressures at which the compressor was validated for water chiller applications and of the turbine and generator in ORC applications.

The invention discloses a method for preparing acetal (ketone) by catalyzing an acidic magnetic material containing -SO3H, which belongs to the technical field of chemical material and preparation thereof. According to the invention, mol ratio of aldehyde or ketone to alcohol used in the preparation method is 1: (1-5), mole of the acidic magnetic material catalyst accounts for 8-10% of that of the used aldehyde or ketone by calculating -SO3H, reaction temperature is 110 DEG C, the reaction time is 0.5-3 hours, the reaction pressure is one atmospheric pressure, a cooling step is carried out to room temperature after reaction is completed, the catalyst is sucked by a magnet, and the conversion rate, selectivity and acetal(ketone) yield of the reaction raw material are detected by a reaction solution through a gas chromatograph. Compared with the preparation method of other catalysts, the method has the advantages of high reaction selectivity, simple separation of the catalyst and the product, the catalyst enables cycle usage without any treatment, the operation of whole preparation process is simple, the economic benefit is high, and the method is convenient for industrial large scale production.