51 results about "Formaldehyde synthesis" patented technology

The invention discloses an iron-molybdenum catalyst for formaldehyde synthesis through methanol oxidation. The iron-molybdenum catalyst consists of an active metal oxide, an assistant metal oxide and a binder metal oxide, wherein the molar ratio of Mo to Fe to V to assistant metal to binder metal is 1:(0.33-0.67):(0.001-0.1):(0.001-0.1):(0.01-0.5). The iron-molybdenum catalyst has the advantages of low cost, long service life and low calcination temperature and reaction temperature.

The invention relates to a process for producing ethylene glycol from synthesis gas, a process for producing ethylene glycol from synthesis gas. Synthesis gas and methanol synthesis tail gas are mixed into methanol synthesis raw materials, and methanol and methanol synthesis are produced under the action of a methanol synthesis catalyst Exhaust gas: a part of methanol is mixed with air to generate formaldehyde and formaldehyde synthesis tail gas under the action of formaldehyde synthesis catalyst, and another part of methanol is mixed with methanol recycled from hydrogenation reaction and then esterified with glycolic acid to form methyl glycolate; synthesis gas separation H obtained 2 After mixing with methyl glycolate hydrogenation tail gas, it will generate ethylene glycol, methanol and hydrogenation tail gas with methyl glycolate under the action of hydrogenation catalyst; separate ethylene glycol and methanol.

The invention discloses an epoxy resin containing phenolic hydroxyl groups and a preparation method of a fire-retardant foam material based on the epoxy resin.The preparation method includes the specific steps that phenol and formaldehyde are synthesized into phenolic resin under the effect of a basic catalyst, the phenolic resin is then reacted with epoxy chloropropane for 2-5 h at 60-100 DEG C so that part of phenolic hydroxyl groups in the phenolic resin can be subjected to an epoxidation reaction, water and unreacted epoxy chloropropane are removed, and the epoxy resin containing phenolic hydroxyl groups is obtained, wherein the epoxide number of the epoxy resin containing phenolic hydroxyl groups is 0.19-0.32 mol / 100 g; then, the fire-retardant foam material is prepared with the obtained epoxy resin containing phenolic hydroxyl groups as the main body, wherein the fire-retardant foam material is prepared from, by weight, 3-8 parts of a surfactant, 80-100 parts of the epoxy resin containing phenolic hydroxyl groups, 4-10 parts of a foaming agent and 10-40 parts of a curing agent.The preparation method is easy and convenient to implement, the polyfunctional epoxy resin containing phenolic hydroxyl groups, epoxy groups, benzene rings and the like is prepared and has the advantages of phenolic resin and the advantages of epoxy resin, and the prepared epoxy resin foam material is excellent in fire retardance, uniform in foam density and low in water absorption and can be applied to the fields of energy saving and heat insulating, fireproof and fire-retardant materials and the like.

The invention provides a novel wood adhesive resin and a preparation method thereof, belonging to the technical field of wood adhesives. The name of the prepared adhesive resin is urea-ethylenediamine-formaldehyde resin. The preparation raw materials include: ethylenediamine, urea and formaldehyde; the molar ratio of urea to ethylenediamine is 2.0-2.5; the molar ratio of formaldehyde to urea is 0.85-1.0. In the preparation process, firstly, ethylenediamine and urea are subjected to deamination condensation reaction under solvent-free and catalyst-free conditions to synthesize urea-ethylenediamine polyamide, and then urea-ethylenediamine polyamide and formaldehyde are synthesized to obtain the product. The final wood adhesive resin; the appearance of the finally prepared wood adhesive resin is a milky white uniform liquid, the solid content is 60-65%, and the storage period is more than 7 days. The urea-ethylenediamine-formaldehyde resin wood adhesive provided by the invention has a simple synthesis method, and has the advantages of low curing temperature, excellent performance, low formaldehyde emission and the like, and can be used for the production of wood-based panels such as plywood and particleboard.

The invention discloses a preparation method of an oil-soluble high-efficiency electric desalination demulsifier for ultra-heavy oil refining. The preparation method comprises the following steps: synthesizing phenolamine resin, and successively condensing the phenolamine resin with propylene oxide and ethylene oxide Reaction to obtain block polyether, then use phenol, hydrochloric acid and formaldehyde to synthesize thermoplastic phenolic resin, and finally carry out phenolic resin graft modification reaction on the obtained thermoplastic phenolic resin and block polyether to obtain ultra-heavy oil refining oil-soluble high-efficiency electric desalination Demulsifier products. The preparation method of the present invention can efficiently prepare an oil-soluble high-efficiency electric desalination demulsifier, reduce production costs, and improve the utilization rate of raw materials. The demulsifier produced by the method can greatly increase the desalination and dehydration speed of super heavy oil, save limited time, and can effectively Make up for the shortcomings of the processing device in the processing of super-heavy oil.

The invention discloses a core-shell SiC@C catalyst for microwave-assisted catalytic depolymerization of solid waste and a preparation method thereof. The core-shell SiC@C catalyst includes a carrier, an active component and a catalytic component. The carrier is SiC@C core-shell composite material, SiC@C core-shell composite material specifically uses resorcinol and formaldehyde to synthesize phenolic resin as a carbon precursor, and coats the surface of SiC to form a carbon layer; the catalytic promoter component is a transition metal The oxide is loaded in the surface pores of the carbon layer; the active component is a noble metal, which is loaded in the surface pores of the carbon layer; and the mass ratio of the carrier, the catalytic promoter component and the active component is 1:(0.005~0.01): (0.01~0.05). The core-shell SiC@C supported catalyst prepared by the invention is used in the microwave-assisted depolymerization process of solid waste, which effectively improves the depolymerization degree and depolymerization efficiency of solid waste, and at the same time improves the orientation of microwave-assisted depolymerization products Regulation has greatly promoted the efficient and high-value utilization of solid waste.