2 results about "Liquefied petroleum gas" patented technology

The invention belongs to the field of foam gap fillers, and especially relates to an ultrahigh-foaming amount polyurethane foaming agent. The ultrahigh-foaming amount polyurethane foaming agent comprises, by mass, 10-70 parts of polyether polyol I, 40-60 parts of mixed polyether polyol II, 3-5 parts of a foam stabilizer, 30-80 parts of paraffin, 3-5 parts of polyether modified polysiloxane, 2-4 parts of a catalyst, 300-400 parts of isocyanate, 40-80 parts of methyl ether, and 30-60 parts of liquefied petroleum gas. A mono-component polyurethane foam gap filler keeps the foam hole size unchanged, makes the foaming amount increase by 58-70% and has a very substantial effect through adding assistants and adjusting the formula without changing the proportion of PAPI or increasing the weight of the above product.

The present, invention relates to a process for the production of additives for catalysts for fluid catalytic cracking (FCC) based on zeolite that is selective for light olefins, with the aim of increasing the yields, in FCC units, of liquefied petroleum gas (LPG) and light olefins, of high added value, among others propene and isobutene. This invention provides a method of preparation of catalytic compositions, starting from zeolite modified with phosphate and alkaline-earth metal, that leads to the production of an additive with better performance than the additives, of similar compositions, obtained by other methods of the prior art. The process can be regarded as a development in relation to other processes, as it promotes interaction between the zeolite that is selective for light olefins and its activator, reagent “X”. For this, a separate stage is used during the sequence of stages in the preparation. Moreover, the zeolite does not undergo additional treatments such as filtration, washing or calcination after the treatment with its activator.

This additive can be obtained starting from any commercial zeolite that is selective for light olefins, such as zeolite of type ZSM-5.