China Petroleum Chemical Corporation

Shanghai Research Institute of Petrochemical Technology, Sinopec

Jiawei Teng

Weimin Yang

Zhiqing Yuan

Wenhua Fu

Zhendong Wang

Songlin Liu

Weichuan Tao

Jian Qiao

Weisheng Yang

Yangdong Wang

Shengli Zhao

Hepan Lu

A SCM-33 molecular sieve has a schematic chemical composition as shown in the formula 'SiO·1/x XO·m MO', wherein X is a framework trivalent element, the Si/X molar ratio x is ≥5, M is a framework equilibrium cation, and the M/Si molar ratio is 0<m≤1. The molecular sieve is a novel molecular sieve with RTE topology and the molecular sieve requires short preparation time, involves a low synthesis cost and can be used as adsorbent or catalyst.

SCM-33 molecular sieve, preparation method therefor and application thereof

A SCM-34 molecular sieve, preparation method therefor and use thereof are provided. The SCM-34 molecular sieve contains aluminum, phosphorus, oxygen and optionally silicon. In the XRD diffraction data of the molecular sieve, a 2θ degree of the strongest peak within the range of 5-50° is 7.59±0.2. The SCM-34 molecular sieve has a new skeleton structure and can be used to prepare a metal-containing AFI type molecular sieve or an SAPO-17 molecular sieve.

SCM-34 molecular sieve, preparation method therefor and use thereof

A silicon-and germanium-based molecular sieve has a framework chemical composition as represented by the formula 'SiO2.1/nGeO2'. The silicon/germanium molar ratio is 0.1n30. The molecular sieve has a unique X-ray diffraction pattern. It can be used in adsorptive separation, ion exchange, and catalytic conversion of organic compounds.

Silicon-and germanium-based SCM-25 molecular sieve, preparation process and use thereof

An aluminophosphate molecular sieve SCM-18 has a schematic chemical composition, expressed on a molar basis, of AlO.n PO, in which n represents a phosphorus to aluminum molar ratio, and is in a range of about 0.8-1.2. The aluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.

Aluminophosphate molecular sieve SCM-18, its preparation and application thereof

A novel silicoaluminophosphate molecular sieve has a schematic chemical composition, expressed on a molar basis, of mSiO&#xb7;AlO&#xb7;nPO, in which m represents the molar ratio of SiOto AlOand is in a range of about 0.005-0.15, and n represents the molar ratio of POto AlOand is in a range of about 0.7-1.1. The silicoaluminophosphate molecular sieve has a unique X-ray diffraction pattern, and can be used as an adsorbent, a catalyst or a catalyst carrier.

Silicoaluminophosphate molecular sieve, its preparation and application thereof

A process for producing ethylene includes the steps of: (1) catalytically cracking a raw material hydrocarbon to obtain a first stream containing propylene; (2) separating the first stream to obtain a C3 component stream; and (3) disproportionating the C3 component stream to obtain an ethylene stream. This process reduces the overall energy consumption of the production process and increases the total yield of the ethylene while obtaining a polymerization-grade ethylene.

Growing community of inventors

Shanghai, China

Jiawei Teng