China Petroleum & Chemical Corporation

Sinopec Catalyst Co., Ltd.

Beijing Research Institute of Chemical Industry

Geneplus—beijing

Ling Yang

Tao Wang

Ye Li

Songyuan Gu

Zhiwei Yuan

Jin'ai Gao

Yuhua Chen

Yan Zhou

Tao An

Hongliang Yi

Fuzu Liu

Zhimin Zhang

Shupeng Xu

Xiping Yin

Zhijian Liu

Hongqi Guo

Yu Wang

Tao Liu

Jun Xiao

Tianyi Li

Zhong Tan

Zhiwu Wang

Xin Yi

Meiru Zhao

Peng Kou

Li'an Yan

Haixiang Cui

Liang Pan

Zhengyang Guo

Xingbo Li

Huijuan Xu

Xiaoxing Lv

Yanfang Guan

In a method for treating waste water containing ammonium salts, sodium sulfate crystal is obtained by freezing crystallization, then the pH value of the waste water is adjusted to a specific range, and next sodium chloride crystal and ammonia water is obtained by evaporation. Alternatively, the pH value of the waste water is adjusted to a specific range, then sodium chloride crystal and ammonia water is obtained by evaporation, and next sodium sulfate crystal is obtained by freezing crystallization. This method can recover ammonia, sodium sulfate, and sodium chloride from the waste water.

Apparatus and method for treating waste water containing ammonium salts

Apparatus and methods are related to treating waste water containing ammonium salts, which contains NH, SO, Cl, and Na. In such a method, the pH value of the waste water to be treated is adjusted to a specific range in advance; sodium sulfate crystal and relatively concentrated ammonia are obtained by first evaporation, and then sodium chloride crystal and relatively dilute ammonia is obtained by second evaporation; alternatively, sodium chloride crystal and relatively concentrated ammonia is obtained by third evaporation, and then sodium sulfate crystal and relatively dilute ammonia are obtained by fourth evaporation. Ammonia, sodium sulfate, and sodium chloride from the waste water are recovered so that the resources in the waste water can be reused.

The present invention provides a low-frequency mutation enrichment sequencing method for free target DNA in plasma, comprising plasma DNA extraction and library construction, general library TT COLD PCR amplification enrichment, probe enrichment capture, PCR and sequencing of captured products, and positive and negatice double-strand error-correction low-frequency information analysis.

Low-frequency mutations enrichment sequencing method for free target DNA in plasma

The present invention relates to the waste water treatment field, and discloses apparatus and method for treating waste water containing ammonium salts, which contains NH, SO, Cl, and Na. In the method of the present invention, the pH value of the waste water to be treated is adjusted to a specific range in advance; sodium sulfate crystal and relatively concentrated ammonia are obtained by first evaporation, and then sodium chloride crystal and relatively dilute ammonia is obtained by second evaporation; alternatively, sodium chloride crystal and relatively concentrated ammonia is obtained by third evaporation, and then sodium sulfate crystal and relatively dilute ammonia are obtained by fourth evaporation. The method of the present invention can recover ammonia, sodium sulfate, and sodium chloride from the waste water respectively, so that the resources in the waste water can be reused as far as possible.

The invention relates to a catalyst component for olefin (co)polymerization, to preparation thereof, to a catalyst comprising the same, and to use thereof in olefin (co)polymerization. The catalyst component of the invention comprises magnesium, titanium, halogen, inner electron donor compound, and alkoxy group derived from a surface modifier, wherein the content of the alkoxy group derived from the surface modifier is in a range of from 0.01 to 3 percent by weight, based on the weight of the catalyst component.

Catalyst component for olefin (co)polymerization, preparation thereof, a catalyst comprising the same and use thereof

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Shandong, China

Ling Yang