44results about How to "Suitable for industrial scale" patented technology

This invention provides a process for producing 2,3,3,3-tetrafluoropropene, the process comprising: (1) a first reaction step of reacting hydrogen fluoride with at least one chlorine-containing compound selected from the group consisting of a chloropropane represented by Formula (1): CClX2CHClCH2Cl, wherein each X is the same or different and is CI or F, a chloropropene represented by Formula (2): CClY2CCl═CH2, wherein each Y is the same or different and is CI or F, and a chloropropene represented by Formula (3): CZ2═CClCH2Cl, wherein each Z is the same or different and is CI or F in a gas phase in the absence of a catalyst while heating; and (2) a second reaction step of reacting hydrogen fluoride with a reaction product obtained in the first reaction step in a gas phase in the presence of a fluorination catalyst while heating. According to the process of this invention, 2,3,3,3-tetrafluoropropene (HFO-1234yf) can be obtained with high selectivity, and catalyst deterioration can be suppressed.

The present disclosure describes processes for producing cyclohexenes using Lewis acidic ionic liquids comprising the steps of providing to a reactor an α,β-unsaturated carbonyl dienophile, providing to the reactor a 1,3-diene, providing a Lewis acidic ionic liquid to the reactor; and reacting the α,β-unsaturated carbonyl dienophile with 1,3-diene to form a substituted cyclohexene product. The α,β-unsaturated carbonyl dienophile can be mesityl oxide, the 1,3-diene can be piperylene; and the Lewis acidic ionic liquid can be AlCl3:[C2mim]Cl; AlCl3:[C8mim]Cl; or mixtures thereof.

The invention relates to an aqueous touch gloss oil for gravure printing and a preparation method thereof. The aqueous touch gloss oil comprises the following components in parts by weight: 30 to 60 parts of film-forming resin, 30 to 60 parts of solvent, and 1 to 8 parts of auxiliary agent; wherein the film-forming resin is acrylic resin, the solvent is water or a mixture of water and alcohol, and the auxiliary agent is polyurethane emulsion. Compared with the prior art, the provided gloss oil belongs to aqueous resin, which has a good levelling property and film surface smoothness. The gloss oil can be well printed on the surface of various paper to protect the integrity and beautiful appearance of printed matters. The gloss oil has the advantages of beautiful appearance, stable performance, good scratch resistant performance, and good waterproof property. The film formed by the gloss oil is transparent, and thus the color and luster of medium can be more clearly displayed. The hand feeling is smooth. The preparation technology is simple, the finished product is stable, additive is not needed, the production cost is saved, and the gloss oil is suitable for industrial high-efficient massive production.

The invention provides a preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles. The preparation method comprises steps as follows: preparation of a heteroatom doped graphene-based material: a graphene-based material is subjected to ultrasonic treatment, a heteroatom precursor is added, heteroatom doping is performed in a hydrothermal kettle at the temperature of 150-200 DEG C, and the heteroatom doped graphene-based material is obtained; preparation of the heteroatom doped graphene-based material supported noble metal nanoparticles: the heteroatom doped graphene-based material is dissolved in deionized water and subjected to ultrasonic treatment, a stabilizer and a metal precursor are added, metal in the metal precursor is platinum, palladium, gold or silver, the mixture is continuously stirred, pH is adjusted to range from 8 to 14, a reduction agent is added, the mixture is continuously stirred, and the heteroatom doped graphene-based material supported noble metal nanoparticles are obtained after vacuum drying. The synergistic effect of the heteroatom and the carrier on noble metal is used, the activity and the stability of a catalyst are effectively improved, and a preparation process is simple and suitable for industrial production and has higher economic value.

The invention discloses a preparation method of PEST resistant composite ceramics. The method comprises the following steps of (1) uniformly mixing C, Si, B, B4C and MoSi2; then, adding bonding agents; performing ball milling, material mixing, compression moulding forming and drying to obtain a blank material; (2) transferring the blank material into a vacuum sintering furnace with Si powder; maintaining the vacuum degree at 10<-2> to 10<-3> Pa; maintaining the temperature rise speed at 1 to 10 DEG C / min; then, performing heat insulation for 5 to 60min at 1400 to 1430 DEG C; then, inflating nitrogen gas or argon gas; raising the temperature to 1450 to 1500 DEG C; performing heat insulation for 5 to 60min; performing vacuum pumping; raising the temperature to 1500 to 1550 DEG C; performing heat insulation for 5 to 40min; finally performing cooling to obtain the composite ceramics. The PEST resistant composite ceramics obtained by the method have low preparation cost and are suitable for industrial mass production.

The invention provides applications of beta-lactamase or peptide of which the identity is at least 20% with a beta-lactamase amino acid sequence as leading peptide in improving functional protein folding. One or more of resectable amino acid residues in a leader sequence used in the invention are same with one or more resectable amino acid residues of an isolated leader sequence and a to-be-folded protein precursor, which is good for resecting leader sequence segments after folding, thus the purification steps at the down stream can be simplified, and also the leader protein provided by the invention can improve the folding of functional protein.