The invention discloses a catalyst for preparing vinyl fluoride (VF) and 1,1-difluoroethane by using acetylene fluoride and a preparation method for the catalyst. The catalyst consists of a carrier and active ingredients, wherein the carrier is a mixture of beta-AlF3, alpha-AlF3 and alpha-Al2O3; the active ingredients Cr2O3 and La2O3 account for 1 to 5 mass percent of the catalyst; and Cr and La are simultaneously carried on the carrier. The method comprises the following steps of: preparing a mixed solution from soluble salts of chromium and lanthanum, adding into gamma-Al2O3, and soaking for 4 hours at room temperature; drying for 12 hours in an oven of 120 DEG C, and roasting for 4 hours in air atmosphere of 1,100 DEG C to obtain powder; and pre-treating the powder for 4 to 6 hours at the temperature of 450 DEG C through anhydrous hydrogen fluoride (HF), introducing N2 till cooling to room temperature, and thus obtaining the catalyst. The catalyst is low in cost, easy to prepare, high in activity and environment-friendly, and can improve the total selectivity of VF and hydrofluorocarbon 152a (HFC-152a).

Catalyst for preparing vinyl fluoride and 1,1-difluoroethane by using acetylene fluoride and preparation method for catalyst

The invention relates to a method for the co-production of trifluoroethylene and hydrogen fluoride, and is used for producing the trifluoroethylene in a hydrogen fluoride removing manner by taking 1,1,1,3-tetrafluoroethane as a main raw material as well as co-producing the hydrogen fluoride. The method comprises the following steps: mixing HFC-134a (1,1,1,2-tetrafluoroethane) and an inert gas at a molar ratio f 1:(1-20); performing a reaction of removing HF (Hydrogen Fluoride) from the HFC-134a in a fixed bed reactor through an acid catalyst under the conditions that the temperature ranges from 300 to 650 DEG C, the air speed ranges from 300 to 2000h and the pressure ranges from 0.1 to 0.8Mp; separating tail gas in a first separation tower; pretreating the catalyst and producing an anhydrous hydrogen fluoride product through the cyclic utilization of the separated hydrogen fluoride; realizing the cyclic utilization of the HFC-134a and the inert gas after separating the HFC-134a with a low boiling point, the inert gas and the trifluoroethylene in a second separation tower; performing alkaline cleaning, drying, compression and condensation liquefaction on the trifluoroethylene; then enabling the trifluoroethylene to enter a first rectifying tower; finally drying and packaging the trifluoroethylene treated in the first rectifying tower. The method is suitable for the production of the trifluoroethylene, and belongs to an atomic economic reaction. The two reaction products have important economic values; the conversion rate of the HFC-134a is high; the selectivity and yield of the trifluoroethylene as a main product are high.

Method for co-production of trifluoroethylene and hydrogen fluoride

Preparation of heptafluoropropane through gas phase catalysis fluorination

Preparation method for trifluoroethylene and tetrafluoroethane

The invention discloses an in-situ activation and evaluation method of a magnesium based catalyst for gas phase cracking of trichloroethane to prepare cis-dichloroethylene; before a reaction of gas phase catalytic cracking of 1,1,2-trichloroethane is carried out, the magnesium based catalyst is subjected to activation treatment at an activation atmosphere and an activation temperature, and then at the reaction total space velocity and reaction temperature, cis-1,2-dichloroethene is directionally synthesized. Through optimizing activation treatment conditions of the magnesium based catalyst and cracking reaction conditions of 1,1,2-trichloroethane, the conversion rate of 1,1,2-trichloroethane reaches more than 96%, and the selectivity of cis-1,2-dichloroethene reaches more than 94%; the method has quite good industrial application prospect, and an industrialization basis is provided for market diversification of trichloroethane cracking products.

In-situ activation and evaluation method of magnesium based catalyst for gas phase cracking of trichloroethane to prepare cis-dichloroethylene

The invention discloses a catalyst for gas phase catalytic cracking of 1,1,2-trichloroethane to prepare cis-1,2-dichloroethene and a preparation method thereof. The preparation method comprises the following steps: (a) preparatory work; (b) analysis of a preparation scheme; and (c) preparation. The magnesium based catalyst can be prepared by the preparation method, the magnesium based catalyst comprises the components of a carrier and an active component, wherein the carrier is one of silica, activated carbon and a silicon aluminum molecular sieve, the active component is one or two of magnesium nitrate, magnesium chloride, magnesium hydroxide and magnesium carbonate. The catalyst is prepared by an impregnation method and a deposition-precipitation method respectively according to different precursors of magnesium. The magnesium based catalyst enables catalytic cracking of 1,1,2-trichloroethane to directionally generate cis-1,2-dichloroethene, has relatively high conversion rate and selectivity, and opens up a new direction for market diversification of 1,1,2-trichloroethane dehydrochlorinated crackates.

Catalyst for gas phase catalytic cracking of 1,1,2-trichloroethane to prepare cis-1,2-dichloroethene and preparation method thereof

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Preparation method for trifluoroethylene and tetrafluoroethane

In-situ activation and evaluation method of magnesium based catalyst for gas phase cracking of trichloroethane to prepare cis-dichloroethylene

Catalyst for gas phase catalytic cracking of 1,1,2-trichloroethane to prepare cis-1,2-dichloroethene and preparation method thereof