The invention discloses a method for synthesizing 3, 3, 3-trifluoro propene. The method is as follows: 1, 1, 1, 3-tetrachloropropane, catalyst and hydrofluoric acid are added in a high-pressure reactor used for deoxidization and dewatering, and are heated to a temperature of between 90 and 500 DEG C so as to carry out reaction for 0.5 to 3 hours, thereby obtaining 3, 3, 3-trifluoro propene product; moreover, the molar ratio between hydrofluoric acid and 1, 1, 1, 3-tetrachloropropane is between 3:1 and 300:1, and the mass ratio between catalyst and 1, 1, 1, 3-tetrachloropropane is between 0.005:1 and 10:1. The method can synthesize 3, 3, 3-trifluoro propene at high transformation efficiency and high selectivity with both the transformation efficiency and the selectivity reaching to more than 98 percent. Moreover, the method has the advantages of simple production equipment, short technological flow, long service life of catalyst, low price, high reaction transformation efficiency, ideal reaction selectivity and high product purity, etc.

Method for synthesizing 3,3,3-trifluoro propene

A process for preparing a catalyst, including the reactive milling of a first reagent, which is a chromium oxide compound, with a second reagent, which is a compound of the formula M z M′ 1-z O x F y , M and M′ each being an element having an oxidation state greater than or equal to 0, z being from 0 to 1, x being from 0 to 3, y being from 0 to 6, and 2x+y being greater than 0 and less than or equal to 6.

Catalyst prepared by reactive milling

The invention discloses a high-activity tungsten-based catalyst. The active metal of the catalyst is composed of a tungsten element and a cocatalyst with mass percentage of 60-100% and 0-40%; and the condition is characterized in that the cocatalyst is not Cr. In addition, the invention also discloses a preparation method of the high-activity tungsten-based catalyst. According to the invention, hydrogen fluoride gas is introduced in an activation phase, a part of molybdenum oxide is converted to oxyfluoride tungstic acid. The high-activity molybdenum-based catalyst has the advantages of safety, environmental protection, no harm, high catalytic activity, high catalysis stability, long usage life, and can be mainly used for performing gas phase catalysis on halogenated alkene to generate a fluorine-chlorine exchange reaction under high temperature condition to prepare fluorinated alkene.

High-activity tungsten-based catalyst, preparation method and purpose thereof

The invention discloses a high-activity molybdenum-based catalyst The active metal of the catalyst is composed of a molybdenum element and a cocatalyst with mass percentage of 60-100% and 0-40%; and the condition is characterized in that the cocatalyst is not Cr In addition, the invention also discloses a preparation method of the high-activity molybdenum-based catalyst According to the invention, hydrogen fluoride gas is introduced in an activation phase, a part of molybdenum oxide is converted to fluoride molybdate and molybdenum oxyfluoride acid The high-activity molybdenum-based catalyst has the advantages of safety, environmental protection, no harm, high catalytic activity, high catalysis stability, long usage life, and can be mainly used for performing gas phase catalysis on halogenated alkene to generate a fluorine-chlorine exchange reaction under high temperature condition to prepare fluorinated alkene

High-activity molybdenum-based catalyst, preparation method and purpose thereof

The invention discloses a preparation method of a fluorination catalyst The preparation method is as follows: preparing a solution of active component metal salts, wherein preferably the atomic ratio of Co/Cr is 005-025 and the atomic ratio of Y/Cr is preferably 001-015; reacting with ammonia water as a precipitant at a PH value between 7 and 9; further stirring and aging for 9-11 minutes; filtering, and washing with deionized water till the solution is neutral; drying a filter cake at a temperature of 100-150 DEG C; carrying out calcination in an inertial gas environment to obtain a catalyst precursor; crushing the catalyst precursor and mixing the catalyst with graphite; laminating the uniformly mixed powder till the lamina cannot be crushed with hands; at the temperature of 200-400 DEG C, introducing inertial gas and hydrogen fluoride mixed gas, and carrying out fluorination to obtain the catalyst, wherein metal cobalt and yttrium form corresponding metal oxide during calcination stage; small metal oxide particles move in the catalyst precursor and the catalyst precursor is etched by the particles, the etching of the residual moisture in the catalyst precursor to the catalyst precursor can also be catalyzed, so as to form a series of porous structures in which medium pores take a great proportion

Preparation method of fluorination catalyst

The invention relates to a catalyst for fluorination, especially a catalyst for producing HFC-134a in gas phase fluorination and the manufacturing method. Aiming at the lack of prior technology, the invention provides a catalyst for producing HFC-134a in gas phase fluorination with high activity and high stability and the manufacturing method. The catalyst comprises carrier and active component. The carrier adopts Y compound and the active component adopts Cr compound. The preparing process for the catalyst for producing HFC-134a in gas phase fluorination is that soluble Cr and Y salts are taken to be dissolved by water according to the proportion; it is mixed in uniformity; precipitant is added to make them precipitate; then the filter solution is neural after centrifugal separation and washing; it is dried; the dried precipitate is formed by tablet mould; the precursor of fluorination catalyst is obtained by baking; after it is treated dry by nitrogen, it is treated by HF without water; finally the catalyst is obtained.

Vapor-phase fluorination catalysts for producing HFC-134a and the preparing method

A high-activity durable fluorinating catalyst for preparing hydrocarbon fluorohydride contains proportionally Cr, In, Co, O and F. It is prepared through fluorinating an oxide or a hydroxide.

Fluorination catalyst, its prepn. method and use

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Yueming Tang

Author Tools

Chat about Author

Papers

Vapor-phase fluorination catalysts for producing HFC-134a and the preparing method

Fluorination catalyst, its prepn. method and use